./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe012_power.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe012_power.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe012_power.opt.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe012_power.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-28 04:02:02,886 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-28 04:02:02,921 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-28 04:02:02,924 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-28 04:02:02,924 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-28 04:02:02,939 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-28 04:02:02,940 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-28 04:02:02,940 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-28 04:02:02,940 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-28 04:02:02,941 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-28 04:02:02,941 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-28 04:02:02,941 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-28 04:02:02,942 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-28 04:02:02,942 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-28 04:02:02,942 INFO L153 SettingsManager]: * Use SBE=true [2024-06-28 04:02:02,943 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-28 04:02:02,943 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-28 04:02:02,943 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-28 04:02:02,943 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-28 04:02:02,944 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-28 04:02:02,944 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-28 04:02:02,944 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-28 04:02:02,945 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-28 04:02:02,945 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-28 04:02:02,945 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-28 04:02:02,945 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-28 04:02:02,946 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-28 04:02:02,946 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-28 04:02:02,946 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-28 04:02:02,946 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-28 04:02:02,946 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-28 04:02:02,947 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-28 04:02:02,947 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 04:02:02,947 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-28 04:02:02,947 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-28 04:02:02,948 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-28 04:02:02,948 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-28 04:02:02,948 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-28 04:02:02,948 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-28 04:02:02,948 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-28 04:02:02,949 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-28 04:02:02,949 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-28 04:02:02,949 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-28 04:02:02,949 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-28 04:02:03,162 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-28 04:02:03,181 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-28 04:02:03,183 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-28 04:02:03,184 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-28 04:02:03,185 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-28 04:02:03,186 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe012_power.opt.yml/witness.yml [2024-06-28 04:02:03,362 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-28 04:02:03,362 INFO L274 PluginConnector]: CDTParser initialized [2024-06-28 04:02:03,363 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe012_power.opt.i [2024-06-28 04:02:04,407 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-28 04:02:04,635 INFO L384 CDTParser]: Found 1 translation units. [2024-06-28 04:02:04,635 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe012_power.opt.i [2024-06-28 04:02:04,647 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/71b47d0e1/0adbdd003dc647d2b1d615c8d8841904/FLAGc7f6d63c2 [2024-06-28 04:02:04,660 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/71b47d0e1/0adbdd003dc647d2b1d615c8d8841904 [2024-06-28 04:02:04,661 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-28 04:02:04,662 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-28 04:02:04,664 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-28 04:02:04,665 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-28 04:02:04,668 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-28 04:02:04,669 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 04:02:03" (1/2) ... [2024-06-28 04:02:04,669 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36927daa and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 04:02:04, skipping insertion in model container [2024-06-28 04:02:04,670 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 04:02:03" (1/2) ... [2024-06-28 04:02:04,671 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@51f76852 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 04:02:04, skipping insertion in model container [2024-06-28 04:02:04,671 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 04:02:04" (2/2) ... [2024-06-28 04:02:04,671 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36927daa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 04:02:04, skipping insertion in model container [2024-06-28 04:02:04,672 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 04:02:04" (2/2) ... [2024-06-28 04:02:04,672 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-28 04:02:04,778 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-28 04:02:04,779 INFO L97 edCorrectnessWitness]: Location invariant before [L853-L853] (((((((((((((((((((((((((((((((((! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 1)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_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) && y$flush_delayed == (_Bool)0) && y$r_buff0_thd0 == (_Bool)0) && y$r_buff0_thd1 == (_Bool)0) && y$r_buff0_thd3 == (_Bool)0) && y$r_buff1_thd0 == (_Bool)0) && y$r_buff1_thd1 == (_Bool)0) && y$r_buff1_thd3 == (_Bool)0) && y$read_delayed == (_Bool)0) && y$read_delayed_var == 0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & y && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1)))) && (x == 0 || x == 1)) && (y == 0 || y == 1)) && (y$mem_tmp == 0 || y$mem_tmp == 1)) && (y$w_buff0 == 0 || y$w_buff0 == 1)) && (y$w_buff1 == 0 || y$w_buff1 == 1)) && (z == 0 || z == 1)))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 1))) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & y && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1))))) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0) [2024-06-28 04:02:04,779 INFO L97 edCorrectnessWitness]: Location invariant before [L856-L856] (((((((((((((((((((((((((((((((((! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 1)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (((((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p2_EAX$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$w_buff1_used == (_Bool)0) && y$flush_delayed == (_Bool)0) && y$r_buff0_thd0 == (_Bool)0) && y$r_buff0_thd1 == (_Bool)0) && y$r_buff0_thd3 == (_Bool)0) && y$r_buff1_thd0 == (_Bool)0) && y$r_buff1_thd1 == (_Bool)0) && y$r_buff1_thd3 == (_Bool)0) && y$read_delayed == (_Bool)0) && y$read_delayed_var == 0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & y && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1)))) && (x == 0 || x == 1)) && (y == 0 || y == 1)) && (y$mem_tmp == 0 || y$mem_tmp == 1)) && (y$w_buff0 == 0 || y$w_buff0 == 1)) && (y$w_buff1 == 0 || y$w_buff1 == 1)) && (z == 0 || z == 1)))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 1))) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & y && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1))))) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0) [2024-06-28 04:02:04,779 INFO L97 edCorrectnessWitness]: Location invariant before [L855-L855] (((((((((((((((((((((((((((((((((! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 1)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_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) && y$flush_delayed == (_Bool)0) && y$r_buff0_thd0 == (_Bool)0) && y$r_buff0_thd1 == (_Bool)0) && y$r_buff0_thd3 == (_Bool)0) && y$r_buff1_thd0 == (_Bool)0) && y$r_buff1_thd1 == (_Bool)0) && y$r_buff1_thd3 == (_Bool)0) && y$read_delayed == (_Bool)0) && y$read_delayed_var == 0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & y && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1)))) && (x == 0 || x == 1)) && (y == 0 || y == 1)) && (y$mem_tmp == 0 || y$mem_tmp == 1)) && (y$w_buff0 == 0 || y$w_buff0 == 1)) && (y$w_buff1 == 0 || y$w_buff1 == 1)) && (z == 0 || z == 1)))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 1))) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & y && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1))))) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0) [2024-06-28 04:02:04,779 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-28 04:02:04,779 INFO L106 edCorrectnessWitness]: ghost_update [L851-L851] multithreaded = 1; [2024-06-28 04:02:04,816 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-28 04:02:05,146 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 04:02:05,154 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-28 04:02:05,264 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 04:02:05,292 INFO L206 MainTranslator]: Completed translation [2024-06-28 04:02:05,293 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 04:02:05 WrapperNode [2024-06-28 04:02:05,293 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-28 04:02:05,294 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-28 04:02:05,294 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-28 04:02:05,294 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-28 04:02:05,299 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 04:02:05" (1/1) ... [2024-06-28 04:02:05,311 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 04:02:05" (1/1) ... [2024-06-28 04:02:05,339 INFO L138 Inliner]: procedures = 175, calls = 84, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 255 [2024-06-28 04:02:05,341 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-28 04:02:05,346 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-28 04:02:05,347 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-28 04:02:05,347 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-28 04:02:05,355 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 04:02:05" (1/1) ... [2024-06-28 04:02:05,355 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 04:02:05" (1/1) ... [2024-06-28 04:02:05,359 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 04:02:05" (1/1) ... [2024-06-28 04:02:05,374 INFO L175 MemorySlicer]: Split 42 memory accesses to 2 slices as follows [2, 40]. 95 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 5 writes are split as follows [0, 5]. [2024-06-28 04:02:05,375 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 04:02:05" (1/1) ... [2024-06-28 04:02:05,375 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 04:02:05" (1/1) ... [2024-06-28 04:02:05,388 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 04:02:05" (1/1) ... [2024-06-28 04:02:05,390 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 04:02:05" (1/1) ... [2024-06-28 04:02:05,392 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 04:02:05" (1/1) ... [2024-06-28 04:02:05,394 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 04:02:05" (1/1) ... [2024-06-28 04:02:05,398 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-28 04:02:05,398 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-28 04:02:05,398 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-28 04:02:05,399 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-28 04:02:05,399 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 04:02:05" (1/1) ... [2024-06-28 04:02:05,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 04:02:05,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 04:02:05,420 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 04:02:05,457 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 04:02:05,481 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-28 04:02:05,481 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-28 04:02:05,481 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-28 04:02:05,482 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-28 04:02:05,482 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-28 04:02:05,482 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-28 04:02:05,482 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-28 04:02:05,482 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-28 04:02:05,482 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-28 04:02:05,482 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-28 04:02:05,483 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-28 04:02:05,483 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-28 04:02:05,483 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-28 04:02:05,483 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-28 04:02:05,483 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-28 04:02:05,483 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-28 04:02:05,483 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-28 04:02:05,485 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 04:02:05,591 INFO L244 CfgBuilder]: Building ICFG [2024-06-28 04:02:05,592 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-28 04:02:06,045 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-28 04:02:06,045 INFO L293 CfgBuilder]: Performing block encoding [2024-06-28 04:02:06,421 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-28 04:02:06,422 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-28 04:02:06,422 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 04:02:06 BoogieIcfgContainer [2024-06-28 04:02:06,422 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-28 04:02:06,424 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-28 04:02:06,424 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-28 04:02:06,427 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-28 04:02:06,427 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 04:02:03" (1/4) ... [2024-06-28 04:02:06,427 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34d29712 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 04:02:06, skipping insertion in model container [2024-06-28 04:02:06,427 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.06 04:02:04" (2/4) ... [2024-06-28 04:02:06,428 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34d29712 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 04:02:06, skipping insertion in model container [2024-06-28 04:02:06,428 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 04:02:05" (3/4) ... [2024-06-28 04:02:06,428 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34d29712 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 04:02:06, skipping insertion in model container [2024-06-28 04:02:06,428 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 04:02:06" (4/4) ... [2024-06-28 04:02:06,429 INFO L112 eAbstractionObserver]: Analyzing ICFG safe012_power.opt.i [2024-06-28 04:02:06,443 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-28 04:02:06,443 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-28 04:02:06,443 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-28 04:02:06,513 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-28 04:02:06,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-28 04:02:06,571 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-28 04:02:06,571 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 04:02:06,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 54 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-28 04:02:06,573 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-28 04:02:06,576 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-28 04:02:06,587 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-28 04:02:06,593 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;@6b53d694, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-28 04:02:06,593 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-28 04:02:06,597 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-28 04:02:06,597 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-28 04:02:06,597 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 04:02:06,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:02:06,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-28 04:02:06,598 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 04:02:06,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:02:06,604 INFO L85 PathProgramCache]: Analyzing trace with hash 809368729, now seen corresponding path program 1 times [2024-06-28 04:02:06,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:02:06,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125328746] [2024-06-28 04:02:06,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:02:06,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:02:06,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:02:08,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:02:08,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:02:08,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125328746] [2024-06-28 04:02:08,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125328746] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:02:08,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:02:08,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-28 04:02:08,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458975074] [2024-06-28 04:02:08,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:02:08,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-28 04:02:08,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:02:08,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-28 04:02:08,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-28 04:02:08,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 04:02:08,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:02:08,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:02:08,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 04:02:08,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:02:08,669 INFO L124 PetriNetUnfolderBase]: 788/1222 cut-off events. [2024-06-28 04:02:08,669 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2024-06-28 04:02:08,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2486 conditions, 1222 events. 788/1222 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 5941 event pairs, 460 based on Foata normal form. 1/1201 useless extension candidates. Maximal degree in co-relation 2474. Up to 1205 conditions per place. [2024-06-28 04:02:08,678 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 34 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2024-06-28 04:02:08,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 45 transitions, 181 flow [2024-06-28 04:02:08,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-28 04:02:08,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-28 04:02:08,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 71 transitions. [2024-06-28 04:02:08,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634920634920635 [2024-06-28 04:02:08,689 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 71 transitions. [2024-06-28 04:02:08,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 45 transitions, 181 flow [2024-06-28 04:02:08,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 45 transitions, 176 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-28 04:02:08,693 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-28 04:02:08,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-28 04:02:08,696 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-28 04:02:08,697 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-28 04:02:08,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:02:08,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:02:08,697 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:02:08,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-28 04:02:08,698 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 04:02:08,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:02:08,698 INFO L85 PathProgramCache]: Analyzing trace with hash -345023968, now seen corresponding path program 1 times [2024-06-28 04:02:08,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:02:08,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790633120] [2024-06-28 04:02:08,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:02:08,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:02:08,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:02:10,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:02:10,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:02:10,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790633120] [2024-06-28 04:02:10,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790633120] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:02:10,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:02:10,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 04:02:10,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458950897] [2024-06-28 04:02:10,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:02:10,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 04:02:10,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:02:10,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 04:02:10,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 04:02:10,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:02:10,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:02:10,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:02:10,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:02:10,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:02:11,124 INFO L124 PetriNetUnfolderBase]: 1391/2103 cut-off events. [2024-06-28 04:02:11,124 INFO L125 PetriNetUnfolderBase]: For 393/393 co-relation queries the response was YES. [2024-06-28 04:02:11,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4836 conditions, 2103 events. 1391/2103 cut-off events. For 393/393 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9687 event pairs, 503 based on Foata normal form. 6/2108 useless extension candidates. Maximal degree in co-relation 4824. Up to 2006 conditions per place. [2024-06-28 04:02:11,134 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 43 selfloop transitions, 6 changer transitions 0/54 dead transitions. [2024-06-28 04:02:11,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 54 transitions, 244 flow [2024-06-28 04:02:11,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 04:02:11,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 04:02:11,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 84 transitions. [2024-06-28 04:02:11,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-28 04:02:11,136 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 84 transitions. [2024-06-28 04:02:11,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 54 transitions, 244 flow [2024-06-28 04:02:11,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 54 transitions, 240 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-28 04:02:11,138 INFO L231 Difference]: Finished difference. Result has 45 places, 37 transitions, 125 flow [2024-06-28 04:02:11,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=125, PETRI_PLACES=45, PETRI_TRANSITIONS=37} [2024-06-28 04:02:11,139 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 2 predicate places. [2024-06-28 04:02:11,139 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 37 transitions, 125 flow [2024-06-28 04:02:11,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:02:11,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:02:11,140 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:02:11,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-28 04:02:11,140 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:02:11,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:02:11,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1215353055, now seen corresponding path program 1 times [2024-06-28 04:02:11,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:02:11,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398644209] [2024-06-28 04:02:11,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:02:11,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:02:11,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:02:12,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:02:12,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:02:12,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398644209] [2024-06-28 04:02:12,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398644209] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:02:12,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:02:12,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 04:02:12,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635431368] [2024-06-28 04:02:12,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:02:12,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 04:02:12,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:02:12,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 04:02:12,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-28 04:02:12,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:02:12,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 37 transitions, 125 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 04:02:12,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:02:12,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:02:12,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:02:13,170 INFO L124 PetriNetUnfolderBase]: 1080/1654 cut-off events. [2024-06-28 04:02:13,170 INFO L125 PetriNetUnfolderBase]: For 852/852 co-relation queries the response was YES. [2024-06-28 04:02:13,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4143 conditions, 1654 events. 1080/1654 cut-off events. For 852/852 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 7820 event pairs, 500 based on Foata normal form. 2/1655 useless extension candidates. Maximal degree in co-relation 4128. Up to 1618 conditions per place. [2024-06-28 04:02:13,178 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 44 selfloop transitions, 8 changer transitions 0/57 dead transitions. [2024-06-28 04:02:13,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 57 transitions, 287 flow [2024-06-28 04:02:13,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 04:02:13,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 04:02:13,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 89 transitions. [2024-06-28 04:02:13,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4238095238095238 [2024-06-28 04:02:13,180 INFO L175 Difference]: Start difference. First operand has 45 places, 37 transitions, 125 flow. Second operand 5 states and 89 transitions. [2024-06-28 04:02:13,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 57 transitions, 287 flow [2024-06-28 04:02:13,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 57 transitions, 270 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-28 04:02:13,182 INFO L231 Difference]: Finished difference. Result has 49 places, 43 transitions, 170 flow [2024-06-28 04:02:13,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=170, PETRI_PLACES=49, PETRI_TRANSITIONS=43} [2024-06-28 04:02:13,183 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 6 predicate places. [2024-06-28 04:02:13,183 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 43 transitions, 170 flow [2024-06-28 04:02:13,183 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 04:02:13,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:02:13,183 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:02:13,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-28 04:02:13,184 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 04:02:13,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:02:13,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1014508366, now seen corresponding path program 1 times [2024-06-28 04:02:13,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:02:13,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496349983] [2024-06-28 04:02:13,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:02:13,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:02:13,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:02:14,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:02:14,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:02:14,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496349983] [2024-06-28 04:02:14,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496349983] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:02:14,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:02:14,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 04:02:14,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215851957] [2024-06-28 04:02:14,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:02:14,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 04:02:14,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:02:14,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 04:02:14,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 04:02:14,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:02:14,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 43 transitions, 170 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 04:02:14,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:02:14,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:02:14,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:02:15,471 INFO L124 PetriNetUnfolderBase]: 1075/1647 cut-off events. [2024-06-28 04:02:15,472 INFO L125 PetriNetUnfolderBase]: For 1455/1455 co-relation queries the response was YES. [2024-06-28 04:02:15,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4566 conditions, 1647 events. 1075/1647 cut-off events. For 1455/1455 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 7733 event pairs, 482 based on Foata normal form. 2/1648 useless extension candidates. Maximal degree in co-relation 4548. Up to 1600 conditions per place. [2024-06-28 04:02:15,479 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 49 selfloop transitions, 11 changer transitions 0/65 dead transitions. [2024-06-28 04:02:15,479 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 65 transitions, 350 flow [2024-06-28 04:02:15,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:02:15,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:02:15,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-28 04:02:15,480 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-28 04:02:15,480 INFO L175 Difference]: Start difference. First operand has 49 places, 43 transitions, 170 flow. Second operand 6 states and 105 transitions. [2024-06-28 04:02:15,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 65 transitions, 350 flow [2024-06-28 04:02:15,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 65 transitions, 344 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-28 04:02:15,482 INFO L231 Difference]: Finished difference. Result has 54 places, 46 transitions, 214 flow [2024-06-28 04:02:15,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=214, PETRI_PLACES=54, PETRI_TRANSITIONS=46} [2024-06-28 04:02:15,483 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 11 predicate places. [2024-06-28 04:02:15,483 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 46 transitions, 214 flow [2024-06-28 04:02:15,484 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 04:02:15,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:02:15,484 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:02:15,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-28 04:02:15,484 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 04:02:15,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:02:15,485 INFO L85 PathProgramCache]: Analyzing trace with hash -276761250, now seen corresponding path program 1 times [2024-06-28 04:02:15,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:02:15,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785636436] [2024-06-28 04:02:15,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:02:15,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:02:15,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:02:17,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:02:17,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:02:17,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785636436] [2024-06-28 04:02:17,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785636436] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:02:17,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:02:17,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:02:17,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789292263] [2024-06-28 04:02:17,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:02:17,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:02:17,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:02:17,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:02:17,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:02:17,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:02:17,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 46 transitions, 214 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 04:02:17,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:02:17,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:02:17,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:02:18,358 INFO L124 PetriNetUnfolderBase]: 1070/1640 cut-off events. [2024-06-28 04:02:18,358 INFO L125 PetriNetUnfolderBase]: For 2308/2308 co-relation queries the response was YES. [2024-06-28 04:02:18,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5003 conditions, 1640 events. 1070/1640 cut-off events. For 2308/2308 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 7674 event pairs, 464 based on Foata normal form. 2/1641 useless extension candidates. Maximal degree in co-relation 4982. Up to 1582 conditions per place. [2024-06-28 04:02:18,368 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 54 selfloop transitions, 14 changer transitions 0/73 dead transitions. [2024-06-28 04:02:18,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 73 transitions, 426 flow [2024-06-28 04:02:18,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:02:18,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:02:18,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-28 04:02:18,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41156462585034015 [2024-06-28 04:02:18,373 INFO L175 Difference]: Start difference. First operand has 54 places, 46 transitions, 214 flow. Second operand 7 states and 121 transitions. [2024-06-28 04:02:18,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 73 transitions, 426 flow [2024-06-28 04:02:18,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 73 transitions, 400 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-28 04:02:18,377 INFO L231 Difference]: Finished difference. Result has 57 places, 49 transitions, 248 flow [2024-06-28 04:02:18,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=248, PETRI_PLACES=57, PETRI_TRANSITIONS=49} [2024-06-28 04:02:18,378 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 14 predicate places. [2024-06-28 04:02:18,378 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 49 transitions, 248 flow [2024-06-28 04:02:18,379 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 04:02:18,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:02:18,379 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:02:18,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-28 04:02:18,379 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 04:02:18,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:02:18,380 INFO L85 PathProgramCache]: Analyzing trace with hash -162402889, now seen corresponding path program 1 times [2024-06-28 04:02:18,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:02:18,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094509472] [2024-06-28 04:02:18,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:02:18,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:02:18,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:02:20,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:02:20,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:02:20,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094509472] [2024-06-28 04:02:20,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094509472] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:02:20,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:02:20,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:02:20,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303932343] [2024-06-28 04:02:20,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:02:20,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:02:20,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:02:20,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:02:20,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:02:20,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:02:20,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 49 transitions, 248 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:02:20,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:02:20,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:02:20,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:02:21,050 INFO L124 PetriNetUnfolderBase]: 1374/2086 cut-off events. [2024-06-28 04:02:21,051 INFO L125 PetriNetUnfolderBase]: For 4004/4004 co-relation queries the response was YES. [2024-06-28 04:02:21,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6726 conditions, 2086 events. 1374/2086 cut-off events. For 4004/4004 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9580 event pairs, 507 based on Foata normal form. 2/2087 useless extension candidates. Maximal degree in co-relation 6704. Up to 1982 conditions per place. [2024-06-28 04:02:21,064 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 51 selfloop transitions, 13 changer transitions 0/68 dead transitions. [2024-06-28 04:02:21,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 68 transitions, 434 flow [2024-06-28 04:02:21,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 04:02:21,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 04:02:21,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 89 transitions. [2024-06-28 04:02:21,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4238095238095238 [2024-06-28 04:02:21,066 INFO L175 Difference]: Start difference. First operand has 57 places, 49 transitions, 248 flow. Second operand 5 states and 89 transitions. [2024-06-28 04:02:21,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 68 transitions, 434 flow [2024-06-28 04:02:21,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 68 transitions, 398 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-28 04:02:21,070 INFO L231 Difference]: Finished difference. Result has 57 places, 52 transitions, 276 flow [2024-06-28 04:02:21,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=276, PETRI_PLACES=57, PETRI_TRANSITIONS=52} [2024-06-28 04:02:21,071 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 14 predicate places. [2024-06-28 04:02:21,071 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 52 transitions, 276 flow [2024-06-28 04:02:21,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:02:21,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:02:21,072 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:02:21,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-28 04:02:21,072 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 04:02:21,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:02:21,073 INFO L85 PathProgramCache]: Analyzing trace with hash 234373703, now seen corresponding path program 2 times [2024-06-28 04:02:21,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:02:21,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027870534] [2024-06-28 04:02:21,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:02:21,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:02:21,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:02:22,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:02:22,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:02:22,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027870534] [2024-06-28 04:02:22,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027870534] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:02:22,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:02:22,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:02:22,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173647059] [2024-06-28 04:02:22,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:02:22,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:02:22,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:02:22,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:02:22,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:02:22,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:02:22,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 52 transitions, 276 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:02:22,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:02:22,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:02:22,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:02:23,531 INFO L124 PetriNetUnfolderBase]: 1369/2079 cut-off events. [2024-06-28 04:02:23,532 INFO L125 PetriNetUnfolderBase]: For 5502/5502 co-relation queries the response was YES. [2024-06-28 04:02:23,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7159 conditions, 2079 events. 1369/2079 cut-off events. For 5502/5502 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9559 event pairs, 507 based on Foata normal form. 2/2080 useless extension candidates. Maximal degree in co-relation 7136. Up to 1964 conditions per place. [2024-06-28 04:02:23,543 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 56 selfloop transitions, 16 changer transitions 0/76 dead transitions. [2024-06-28 04:02:23,543 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 76 transitions, 496 flow [2024-06-28 04:02:23,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:02:23,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:02:23,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 104 transitions. [2024-06-28 04:02:23,545 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-28 04:02:23,545 INFO L175 Difference]: Start difference. First operand has 57 places, 52 transitions, 276 flow. Second operand 6 states and 104 transitions. [2024-06-28 04:02:23,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 76 transitions, 496 flow [2024-06-28 04:02:23,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 76 transitions, 456 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-28 04:02:23,549 INFO L231 Difference]: Finished difference. Result has 60 places, 55 transitions, 308 flow [2024-06-28 04:02:23,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=308, PETRI_PLACES=60, PETRI_TRANSITIONS=55} [2024-06-28 04:02:23,549 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 17 predicate places. [2024-06-28 04:02:23,550 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 55 transitions, 308 flow [2024-06-28 04:02:23,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:02:23,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:02:23,550 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:02:23,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-28 04:02:23,550 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 04:02:23,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:02:23,551 INFO L85 PathProgramCache]: Analyzing trace with hash 10337697, now seen corresponding path program 1 times [2024-06-28 04:02:23,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:02:23,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115042455] [2024-06-28 04:02:23,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:02:23,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:02:23,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:02:25,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:02:25,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:02:25,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115042455] [2024-06-28 04:02:25,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115042455] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:02:25,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:02:25,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:02:25,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533669953] [2024-06-28 04:02:25,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:02:25,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:02:25,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:02:25,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:02:25,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:02:25,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:02:25,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 55 transitions, 308 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 04:02:25,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:02:25,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:02:25,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:02:26,746 INFO L124 PetriNetUnfolderBase]: 1070/1646 cut-off events. [2024-06-28 04:02:26,746 INFO L125 PetriNetUnfolderBase]: For 4955/4955 co-relation queries the response was YES. [2024-06-28 04:02:26,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5946 conditions, 1646 events. 1070/1646 cut-off events. For 4955/4955 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 7769 event pairs, 427 based on Foata normal form. 4/1649 useless extension candidates. Maximal degree in co-relation 5922. Up to 1560 conditions per place. [2024-06-28 04:02:26,760 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 66 selfloop transitions, 16 changer transitions 0/87 dead transitions. [2024-06-28 04:02:26,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 87 transitions, 566 flow [2024-06-28 04:02:26,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:02:26,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:02:26,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-28 04:02:26,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-28 04:02:26,764 INFO L175 Difference]: Start difference. First operand has 60 places, 55 transitions, 308 flow. Second operand 8 states and 137 transitions. [2024-06-28 04:02:26,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 87 transitions, 566 flow [2024-06-28 04:02:26,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 87 transitions, 522 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-28 04:02:26,768 INFO L231 Difference]: Finished difference. Result has 64 places, 57 transitions, 329 flow [2024-06-28 04:02:26,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=329, PETRI_PLACES=64, PETRI_TRANSITIONS=57} [2024-06-28 04:02:26,771 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 21 predicate places. [2024-06-28 04:02:26,771 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 57 transitions, 329 flow [2024-06-28 04:02:26,771 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 04:02:26,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:02:26,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:02:26,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-28 04:02:26,772 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 04:02:26,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:02:26,772 INFO L85 PathProgramCache]: Analyzing trace with hash -739520470, now seen corresponding path program 1 times [2024-06-28 04:02:26,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:02:26,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114143676] [2024-06-28 04:02:26,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:02:26,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:02:26,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:02:28,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:02:28,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:02:28,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114143676] [2024-06-28 04:02:28,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114143676] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:02:28,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:02:28,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:02:28,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885760051] [2024-06-28 04:02:28,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:02:28,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:02:28,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:02:28,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:02:28,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:02:28,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:02:28,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 57 transitions, 329 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:02:28,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:02:28,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:02:28,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:02:29,182 INFO L124 PetriNetUnfolderBase]: 1366/2080 cut-off events. [2024-06-28 04:02:29,183 INFO L125 PetriNetUnfolderBase]: For 7275/7275 co-relation queries the response was YES. [2024-06-28 04:02:29,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7595 conditions, 2080 events. 1366/2080 cut-off events. For 7275/7275 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 9529 event pairs, 481 based on Foata normal form. 2/2081 useless extension candidates. Maximal degree in co-relation 7570. Up to 1931 conditions per place. [2024-06-28 04:02:29,193 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 59 selfloop transitions, 19 changer transitions 0/82 dead transitions. [2024-06-28 04:02:29,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 82 transitions, 565 flow [2024-06-28 04:02:29,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:02:29,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:02:29,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-28 04:02:29,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-28 04:02:29,194 INFO L175 Difference]: Start difference. First operand has 64 places, 57 transitions, 329 flow. Second operand 6 states and 106 transitions. [2024-06-28 04:02:29,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 82 transitions, 565 flow [2024-06-28 04:02:29,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 82 transitions, 518 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-28 04:02:29,200 INFO L231 Difference]: Finished difference. Result has 64 places, 60 transitions, 366 flow [2024-06-28 04:02:29,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=282, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=366, PETRI_PLACES=64, PETRI_TRANSITIONS=60} [2024-06-28 04:02:29,201 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 21 predicate places. [2024-06-28 04:02:29,201 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 60 transitions, 366 flow [2024-06-28 04:02:29,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:02:29,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:02:29,201 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:02:29,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-28 04:02:29,201 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:02:29,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:02:29,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1324342426, now seen corresponding path program 2 times [2024-06-28 04:02:29,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:02:29,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67980869] [2024-06-28 04:02:29,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:02:29,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:02:29,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:02:31,031 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 04:02:31,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:02:31,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67980869] [2024-06-28 04:02:31,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67980869] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:02:31,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:02:31,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:02:31,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647348409] [2024-06-28 04:02:31,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:02:31,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:02:31,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:02:31,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:02:31,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:02:31,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:02:31,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 60 transitions, 366 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:02:31,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:02:31,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:02:31,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:02:31,784 INFO L124 PetriNetUnfolderBase]: 1379/2099 cut-off events. [2024-06-28 04:02:31,785 INFO L125 PetriNetUnfolderBase]: For 9308/9308 co-relation queries the response was YES. [2024-06-28 04:02:31,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8087 conditions, 2099 events. 1379/2099 cut-off events. For 9308/9308 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 9694 event pairs, 481 based on Foata normal form. 2/2100 useless extension candidates. Maximal degree in co-relation 8061. Up to 1915 conditions per place. [2024-06-28 04:02:31,794 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 64 selfloop transitions, 27 changer transitions 0/95 dead transitions. [2024-06-28 04:02:31,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 95 transitions, 716 flow [2024-06-28 04:02:31,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:02:31,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:02:31,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-28 04:02:31,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41836734693877553 [2024-06-28 04:02:31,796 INFO L175 Difference]: Start difference. First operand has 64 places, 60 transitions, 366 flow. Second operand 7 states and 123 transitions. [2024-06-28 04:02:31,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 95 transitions, 716 flow [2024-06-28 04:02:31,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 95 transitions, 668 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-28 04:02:31,804 INFO L231 Difference]: Finished difference. Result has 67 places, 66 transitions, 454 flow [2024-06-28 04:02:31,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=318, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=454, PETRI_PLACES=67, PETRI_TRANSITIONS=66} [2024-06-28 04:02:31,806 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 24 predicate places. [2024-06-28 04:02:31,806 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 66 transitions, 454 flow [2024-06-28 04:02:31,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:02:31,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:02:31,806 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:02:31,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-28 04:02:31,807 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 04:02:31,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:02:31,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1324348006, now seen corresponding path program 3 times [2024-06-28 04:02:31,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:02:31,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517181740] [2024-06-28 04:02:31,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:02:31,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:02:31,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:02:33,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:02:33,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:02:33,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517181740] [2024-06-28 04:02:33,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517181740] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:02:33,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:02:33,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:02:33,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243245342] [2024-06-28 04:02:33,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:02:33,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:02:33,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:02:33,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:02:33,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:02:33,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:02:33,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 66 transitions, 454 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:02:33,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:02:33,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:02:33,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:02:34,654 INFO L124 PetriNetUnfolderBase]: 1488/2277 cut-off events. [2024-06-28 04:02:34,655 INFO L125 PetriNetUnfolderBase]: For 12373/12381 co-relation queries the response was YES. [2024-06-28 04:02:34,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9324 conditions, 2277 events. 1488/2277 cut-off events. For 12373/12381 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 10674 event pairs, 468 based on Foata normal form. 10/2287 useless extension candidates. Maximal degree in co-relation 9297. Up to 2060 conditions per place. [2024-06-28 04:02:34,666 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 90 selfloop transitions, 44 changer transitions 0/138 dead transitions. [2024-06-28 04:02:34,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 138 transitions, 1103 flow [2024-06-28 04:02:34,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:02:34,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:02:34,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-28 04:02:34,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-28 04:02:34,668 INFO L175 Difference]: Start difference. First operand has 67 places, 66 transitions, 454 flow. Second operand 9 states and 157 transitions. [2024-06-28 04:02:34,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 138 transitions, 1103 flow [2024-06-28 04:02:34,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 138 transitions, 1029 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-28 04:02:34,680 INFO L231 Difference]: Finished difference. Result has 77 places, 97 transitions, 799 flow [2024-06-28 04:02:34,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=408, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=799, PETRI_PLACES=77, PETRI_TRANSITIONS=97} [2024-06-28 04:02:34,681 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 34 predicate places. [2024-06-28 04:02:34,681 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 97 transitions, 799 flow [2024-06-28 04:02:34,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:02:34,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:02:34,681 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:02:34,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-28 04:02:34,681 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:02:34,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:02:34,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1166953578, now seen corresponding path program 4 times [2024-06-28 04:02:34,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:02:34,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581782223] [2024-06-28 04:02:34,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:02:34,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:02:34,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:02:36,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:02:36,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:02:36,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581782223] [2024-06-28 04:02:36,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581782223] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:02:36,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:02:36,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:02:36,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628415494] [2024-06-28 04:02:36,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:02:36,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:02:36,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:02:36,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:02:36,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:02:36,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:02:36,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 97 transitions, 799 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:02:36,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:02:36,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:02:36,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:02:37,570 INFO L124 PetriNetUnfolderBase]: 1545/2368 cut-off events. [2024-06-28 04:02:37,570 INFO L125 PetriNetUnfolderBase]: For 14488/14494 co-relation queries the response was YES. [2024-06-28 04:02:37,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10507 conditions, 2368 events. 1545/2368 cut-off events. For 14488/14494 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 11123 event pairs, 489 based on Foata normal form. 6/2373 useless extension candidates. Maximal degree in co-relation 10474. Up to 2113 conditions per place. [2024-06-28 04:02:37,616 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 84 selfloop transitions, 54 changer transitions 0/142 dead transitions. [2024-06-28 04:02:37,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 142 transitions, 1330 flow [2024-06-28 04:02:37,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:02:37,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:02:37,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-28 04:02:37,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-28 04:02:37,618 INFO L175 Difference]: Start difference. First operand has 77 places, 97 transitions, 799 flow. Second operand 8 states and 134 transitions. [2024-06-28 04:02:37,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 142 transitions, 1330 flow [2024-06-28 04:02:37,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 142 transitions, 1254 flow, removed 14 selfloop flow, removed 2 redundant places. [2024-06-28 04:02:37,633 INFO L231 Difference]: Finished difference. Result has 85 places, 112 transitions, 1050 flow [2024-06-28 04:02:37,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=733, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1050, PETRI_PLACES=85, PETRI_TRANSITIONS=112} [2024-06-28 04:02:37,633 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 42 predicate places. [2024-06-28 04:02:37,634 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 112 transitions, 1050 flow [2024-06-28 04:02:37,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:02:37,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:02:37,634 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:02:37,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-28 04:02:37,634 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 04:02:37,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:02:37,635 INFO L85 PathProgramCache]: Analyzing trace with hash -589932966, now seen corresponding path program 5 times [2024-06-28 04:02:37,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:02:37,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722588071] [2024-06-28 04:02:37,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:02:37,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:02:37,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:02:39,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:02:39,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:02:39,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722588071] [2024-06-28 04:02:39,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722588071] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:02:39,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:02:39,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:02:39,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343470409] [2024-06-28 04:02:39,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:02:39,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:02:39,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:02:39,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:02:39,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:02:39,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:02:39,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 112 transitions, 1050 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:02:39,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:02:39,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:02:39,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:02:40,263 INFO L124 PetriNetUnfolderBase]: 1540/2364 cut-off events. [2024-06-28 04:02:40,264 INFO L125 PetriNetUnfolderBase]: For 16999/17007 co-relation queries the response was YES. [2024-06-28 04:02:40,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10810 conditions, 2364 events. 1540/2364 cut-off events. For 16999/17007 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 11129 event pairs, 485 based on Foata normal form. 8/2371 useless extension candidates. Maximal degree in co-relation 10773. Up to 2080 conditions per place. [2024-06-28 04:02:40,278 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 73 selfloop transitions, 61 changer transitions 0/138 dead transitions. [2024-06-28 04:02:40,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 138 transitions, 1398 flow [2024-06-28 04:02:40,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:02:40,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:02:40,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-28 04:02:40,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-28 04:02:40,281 INFO L175 Difference]: Start difference. First operand has 85 places, 112 transitions, 1050 flow. Second operand 7 states and 119 transitions. [2024-06-28 04:02:40,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 138 transitions, 1398 flow [2024-06-28 04:02:40,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 138 transitions, 1285 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-28 04:02:40,303 INFO L231 Difference]: Finished difference. Result has 89 places, 112 transitions, 1077 flow [2024-06-28 04:02:40,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=937, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1077, PETRI_PLACES=89, PETRI_TRANSITIONS=112} [2024-06-28 04:02:40,304 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 46 predicate places. [2024-06-28 04:02:40,304 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 112 transitions, 1077 flow [2024-06-28 04:02:40,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:02:40,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:02:40,305 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:02:40,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-28 04:02:40,305 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:02:40,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:02:40,305 INFO L85 PathProgramCache]: Analyzing trace with hash -32729889, now seen corresponding path program 1 times [2024-06-28 04:02:40,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:02:40,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527844607] [2024-06-28 04:02:40,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:02:40,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:02:40,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:02:42,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:02:42,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:02:42,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527844607] [2024-06-28 04:02:42,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527844607] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:02:42,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:02:42,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 04:02:42,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770222016] [2024-06-28 04:02:42,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:02:42,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 04:02:42,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:02:42,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 04:02:42,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-28 04:02:42,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:02:42,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 112 transitions, 1077 flow. Second operand has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:02:42,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:02:42,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:02:42,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:02:42,729 INFO L124 PetriNetUnfolderBase]: 1309/2085 cut-off events. [2024-06-28 04:02:42,729 INFO L125 PetriNetUnfolderBase]: For 18015/18045 co-relation queries the response was YES. [2024-06-28 04:02:42,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9842 conditions, 2085 events. 1309/2085 cut-off events. For 18015/18045 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 10065 event pairs, 460 based on Foata normal form. 22/2093 useless extension candidates. Maximal degree in co-relation 9804. Up to 1930 conditions per place. [2024-06-28 04:02:42,742 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 95 selfloop transitions, 16 changer transitions 0/126 dead transitions. [2024-06-28 04:02:42,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 126 transitions, 1353 flow [2024-06-28 04:02:42,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 04:02:42,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 04:02:42,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 88 transitions. [2024-06-28 04:02:42,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41904761904761906 [2024-06-28 04:02:42,743 INFO L175 Difference]: Start difference. First operand has 89 places, 112 transitions, 1077 flow. Second operand 5 states and 88 transitions. [2024-06-28 04:02:42,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 126 transitions, 1353 flow [2024-06-28 04:02:42,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 126 transitions, 1198 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-28 04:02:42,760 INFO L231 Difference]: Finished difference. Result has 88 places, 115 transitions, 990 flow [2024-06-28 04:02:42,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=922, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=990, PETRI_PLACES=88, PETRI_TRANSITIONS=115} [2024-06-28 04:02:42,761 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 45 predicate places. [2024-06-28 04:02:42,761 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 115 transitions, 990 flow [2024-06-28 04:02:42,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:02:42,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:02:42,761 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:02:42,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-28 04:02:42,762 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 04:02:42,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:02:42,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1238009808, now seen corresponding path program 1 times [2024-06-28 04:02:42,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:02:42,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658304746] [2024-06-28 04:02:42,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:02:42,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:02:42,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:02:44,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:02:44,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:02:44,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658304746] [2024-06-28 04:02:44,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658304746] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:02:44,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:02:44,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:02:44,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169923131] [2024-06-28 04:02:44,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:02:44,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:02:44,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:02:44,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:02:44,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:02:44,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:02:44,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 115 transitions, 990 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:02:44,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:02:44,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:02:44,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:02:45,796 INFO L124 PetriNetUnfolderBase]: 1579/2428 cut-off events. [2024-06-28 04:02:45,796 INFO L125 PetriNetUnfolderBase]: For 17017/17025 co-relation queries the response was YES. [2024-06-28 04:02:45,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11112 conditions, 2428 events. 1579/2428 cut-off events. For 17017/17025 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 11471 event pairs, 320 based on Foata normal form. 10/2437 useless extension candidates. Maximal degree in co-relation 11073. Up to 2120 conditions per place. [2024-06-28 04:02:45,809 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 102 selfloop transitions, 43 changer transitions 0/149 dead transitions. [2024-06-28 04:02:45,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 149 transitions, 1462 flow [2024-06-28 04:02:45,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:02:45,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:02:45,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-28 04:02:45,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41496598639455784 [2024-06-28 04:02:45,811 INFO L175 Difference]: Start difference. First operand has 88 places, 115 transitions, 990 flow. Second operand 7 states and 122 transitions. [2024-06-28 04:02:45,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 149 transitions, 1462 flow [2024-06-28 04:02:45,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 149 transitions, 1424 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-28 04:02:45,827 INFO L231 Difference]: Finished difference. Result has 92 places, 119 transitions, 1101 flow [2024-06-28 04:02:45,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=952, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1101, PETRI_PLACES=92, PETRI_TRANSITIONS=119} [2024-06-28 04:02:45,827 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 49 predicate places. [2024-06-28 04:02:45,828 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 119 transitions, 1101 flow [2024-06-28 04:02:45,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:02:45,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:02:45,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:02:45,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-28 04:02:45,828 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:02:45,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:02:45,829 INFO L85 PathProgramCache]: Analyzing trace with hash 907909140, now seen corresponding path program 2 times [2024-06-28 04:02:45,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:02:45,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134708681] [2024-06-28 04:02:45,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:02:45,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:02:45,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:02:47,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:02:47,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:02:47,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134708681] [2024-06-28 04:02:47,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134708681] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:02:47,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:02:47,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:02:47,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298421281] [2024-06-28 04:02:47,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:02:47,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:02:47,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:02:47,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:02:47,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:02:47,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:02:47,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 119 transitions, 1101 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:02:47,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:02:47,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:02:47,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:02:48,812 INFO L124 PetriNetUnfolderBase]: 1571/2416 cut-off events. [2024-06-28 04:02:48,813 INFO L125 PetriNetUnfolderBase]: For 19394/19402 co-relation queries the response was YES. [2024-06-28 04:02:48,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11470 conditions, 2416 events. 1571/2416 cut-off events. For 19394/19402 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 11421 event pairs, 446 based on Foata normal form. 10/2425 useless extension candidates. Maximal degree in co-relation 11430. Up to 2188 conditions per place. [2024-06-28 04:02:48,824 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 98 selfloop transitions, 39 changer transitions 0/141 dead transitions. [2024-06-28 04:02:48,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 141 transitions, 1443 flow [2024-06-28 04:02:48,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:02:48,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:02:48,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 104 transitions. [2024-06-28 04:02:48,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-28 04:02:48,826 INFO L175 Difference]: Start difference. First operand has 92 places, 119 transitions, 1101 flow. Second operand 6 states and 104 transitions. [2024-06-28 04:02:48,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 141 transitions, 1443 flow [2024-06-28 04:02:48,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 141 transitions, 1359 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-06-28 04:02:48,844 INFO L231 Difference]: Finished difference. Result has 95 places, 119 transitions, 1104 flow [2024-06-28 04:02:48,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1017, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1104, PETRI_PLACES=95, PETRI_TRANSITIONS=119} [2024-06-28 04:02:48,844 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 52 predicate places. [2024-06-28 04:02:48,844 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 119 transitions, 1104 flow [2024-06-28 04:02:48,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:02:48,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:02:48,845 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:02:48,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-28 04:02:48,845 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 04:02:48,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:02:48,846 INFO L85 PathProgramCache]: Analyzing trace with hash 907914100, now seen corresponding path program 1 times [2024-06-28 04:02:48,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:02:48,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761251531] [2024-06-28 04:02:48,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:02:48,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:02:48,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:02:51,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:02:51,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:02:51,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761251531] [2024-06-28 04:02:51,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761251531] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:02:51,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:02:51,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:02:51,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583839831] [2024-06-28 04:02:51,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:02:51,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:02:51,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:02:51,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:02:51,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:02:51,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:02:51,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 119 transitions, 1104 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:02:51,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:02:51,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:02:51,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:02:51,944 INFO L124 PetriNetUnfolderBase]: 1584/2441 cut-off events. [2024-06-28 04:02:51,944 INFO L125 PetriNetUnfolderBase]: For 21514/21522 co-relation queries the response was YES. [2024-06-28 04:02:51,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11806 conditions, 2441 events. 1584/2441 cut-off events. For 21514/21522 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 11605 event pairs, 428 based on Foata normal form. 8/2448 useless extension candidates. Maximal degree in co-relation 11764. Up to 2131 conditions per place. [2024-06-28 04:02:51,956 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 97 selfloop transitions, 49 changer transitions 0/150 dead transitions. [2024-06-28 04:02:51,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 150 transitions, 1524 flow [2024-06-28 04:02:51,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:02:51,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:02:51,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-28 04:02:51,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41836734693877553 [2024-06-28 04:02:51,957 INFO L175 Difference]: Start difference. First operand has 95 places, 119 transitions, 1104 flow. Second operand 7 states and 123 transitions. [2024-06-28 04:02:51,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 150 transitions, 1524 flow [2024-06-28 04:02:51,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 150 transitions, 1440 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-28 04:02:51,975 INFO L231 Difference]: Finished difference. Result has 97 places, 122 transitions, 1176 flow [2024-06-28 04:02:51,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1020, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1176, PETRI_PLACES=97, PETRI_TRANSITIONS=122} [2024-06-28 04:02:51,976 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 54 predicate places. [2024-06-28 04:02:51,976 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 122 transitions, 1176 flow [2024-06-28 04:02:51,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:02:51,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:02:51,976 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:02:51,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-28 04:02:51,977 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:02:51,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:02:51,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1108055898, now seen corresponding path program 3 times [2024-06-28 04:02:51,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:02:51,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004310210] [2024-06-28 04:02:51,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:02:51,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:02:51,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:02:53,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:02:53,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:02:53,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004310210] [2024-06-28 04:02:53,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004310210] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:02:53,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:02:53,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:02:53,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678070144] [2024-06-28 04:02:53,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:02:53,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:02:53,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:02:53,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:02:53,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:02:53,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:02:53,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 122 transitions, 1176 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:02:53,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:02:53,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:02:53,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:02:54,660 INFO L124 PetriNetUnfolderBase]: 1576/2429 cut-off events. [2024-06-28 04:02:54,660 INFO L125 PetriNetUnfolderBase]: For 24243/24251 co-relation queries the response was YES. [2024-06-28 04:02:54,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12187 conditions, 2429 events. 1576/2429 cut-off events. For 24243/24251 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 11528 event pairs, 426 based on Foata normal form. 10/2438 useless extension candidates. Maximal degree in co-relation 12144. Up to 2138 conditions per place. [2024-06-28 04:02:54,673 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 93 selfloop transitions, 54 changer transitions 0/151 dead transitions. [2024-06-28 04:02:54,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 151 transitions, 1584 flow [2024-06-28 04:02:54,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:02:54,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:02:54,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-28 04:02:54,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-28 04:02:54,675 INFO L175 Difference]: Start difference. First operand has 97 places, 122 transitions, 1176 flow. Second operand 7 states and 119 transitions. [2024-06-28 04:02:54,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 151 transitions, 1584 flow [2024-06-28 04:02:54,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 151 transitions, 1464 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-28 04:02:54,696 INFO L231 Difference]: Finished difference. Result has 99 places, 124 transitions, 1211 flow [2024-06-28 04:02:54,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1056, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1211, PETRI_PLACES=99, PETRI_TRANSITIONS=124} [2024-06-28 04:02:54,696 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 56 predicate places. [2024-06-28 04:02:54,696 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 124 transitions, 1211 flow [2024-06-28 04:02:54,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:02:54,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:02:54,697 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:02:54,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-28 04:02:54,697 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:02:54,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:02:54,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1103114280, now seen corresponding path program 2 times [2024-06-28 04:02:54,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:02:54,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599537302] [2024-06-28 04:02:54,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:02:54,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:02:54,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:02:56,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:02:56,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:02:56,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599537302] [2024-06-28 04:02:56,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599537302] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:02:56,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:02:56,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:02:56,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317451501] [2024-06-28 04:02:56,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:02:56,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:02:56,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:02:56,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:02:56,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:02:57,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:02:57,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 124 transitions, 1211 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:02:57,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:02:57,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:02:57,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:02:57,978 INFO L124 PetriNetUnfolderBase]: 1589/2442 cut-off events. [2024-06-28 04:02:57,979 INFO L125 PetriNetUnfolderBase]: For 27717/27719 co-relation queries the response was YES. [2024-06-28 04:02:57,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12564 conditions, 2442 events. 1589/2442 cut-off events. For 27717/27719 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 11554 event pairs, 434 based on Foata normal form. 2/2443 useless extension candidates. Maximal degree in co-relation 12520. Up to 1997 conditions per place. [2024-06-28 04:02:57,994 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 82 selfloop transitions, 78 changer transitions 0/164 dead transitions. [2024-06-28 04:02:57,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 164 transitions, 1785 flow [2024-06-28 04:02:57,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:02:57,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:02:57,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-28 04:02:57,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-28 04:02:57,996 INFO L175 Difference]: Start difference. First operand has 99 places, 124 transitions, 1211 flow. Second operand 8 states and 140 transitions. [2024-06-28 04:02:57,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 164 transitions, 1785 flow [2024-06-28 04:02:58,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 164 transitions, 1656 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-28 04:02:58,023 INFO L231 Difference]: Finished difference. Result has 102 places, 130 transitions, 1348 flow [2024-06-28 04:02:58,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1082, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1348, PETRI_PLACES=102, PETRI_TRANSITIONS=130} [2024-06-28 04:02:58,023 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 59 predicate places. [2024-06-28 04:02:58,023 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 130 transitions, 1348 flow [2024-06-28 04:02:58,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:02:58,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:02:58,024 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:02:58,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-28 04:02:58,024 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:02:58,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:02:58,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1107877958, now seen corresponding path program 3 times [2024-06-28 04:02:58,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:02:58,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870722866] [2024-06-28 04:02:58,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:02:58,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:02:58,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:03:00,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:03:00,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:03:00,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870722866] [2024-06-28 04:03:00,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870722866] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:03:00,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:03:00,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:03:00,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069487923] [2024-06-28 04:03:00,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:03:00,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:03:00,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:03:00,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:03:00,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:03:00,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:03:00,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 130 transitions, 1348 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:03:00,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:03:00,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:03:00,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:03:01,041 INFO L124 PetriNetUnfolderBase]: 1602/2461 cut-off events. [2024-06-28 04:03:01,042 INFO L125 PetriNetUnfolderBase]: For 31325/31327 co-relation queries the response was YES. [2024-06-28 04:03:01,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13164 conditions, 2461 events. 1602/2461 cut-off events. For 31325/31327 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 11644 event pairs, 434 based on Foata normal form. 2/2462 useless extension candidates. Maximal degree in co-relation 13119. Up to 2086 conditions per place. [2024-06-28 04:03:01,060 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 90 selfloop transitions, 70 changer transitions 0/164 dead transitions. [2024-06-28 04:03:01,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 164 transitions, 1814 flow [2024-06-28 04:03:01,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:03:01,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:03:01,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-28 04:03:01,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-28 04:03:01,064 INFO L175 Difference]: Start difference. First operand has 102 places, 130 transitions, 1348 flow. Second operand 8 states and 136 transitions. [2024-06-28 04:03:01,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 164 transitions, 1814 flow [2024-06-28 04:03:01,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 164 transitions, 1675 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-28 04:03:01,089 INFO L231 Difference]: Finished difference. Result has 106 places, 133 transitions, 1417 flow [2024-06-28 04:03:01,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1215, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1417, PETRI_PLACES=106, PETRI_TRANSITIONS=133} [2024-06-28 04:03:01,090 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 63 predicate places. [2024-06-28 04:03:01,090 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 133 transitions, 1417 flow [2024-06-28 04:03:01,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:03:01,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:03:01,090 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:03:01,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-28 04:03:01,091 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:03:01,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:03:01,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1108050938, now seen corresponding path program 4 times [2024-06-28 04:03:01,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:03:01,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361941482] [2024-06-28 04:03:01,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:03:01,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:03:01,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:03:03,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:03:03,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:03:03,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361941482] [2024-06-28 04:03:03,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361941482] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:03:03,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:03:03,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:03:03,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090073803] [2024-06-28 04:03:03,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:03:03,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:03:03,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:03:03,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:03:03,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:03:03,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:03:03,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 133 transitions, 1417 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:03:03,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:03:03,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:03:03,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:03:04,724 INFO L124 PetriNetUnfolderBase]: 1597/2460 cut-off events. [2024-06-28 04:03:04,725 INFO L125 PetriNetUnfolderBase]: For 33432/33440 co-relation queries the response was YES. [2024-06-28 04:03:04,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13393 conditions, 2460 events. 1597/2460 cut-off events. For 33432/33440 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 11727 event pairs, 426 based on Foata normal form. 8/2467 useless extension candidates. Maximal degree in co-relation 13346. Up to 2147 conditions per place. [2024-06-28 04:03:04,741 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 96 selfloop transitions, 64 changer transitions 0/164 dead transitions. [2024-06-28 04:03:04,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 164 transitions, 1831 flow [2024-06-28 04:03:04,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:03:04,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:03:04,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-28 04:03:04,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-28 04:03:04,743 INFO L175 Difference]: Start difference. First operand has 106 places, 133 transitions, 1417 flow. Second operand 8 states and 134 transitions. [2024-06-28 04:03:04,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 164 transitions, 1831 flow [2024-06-28 04:03:04,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 164 transitions, 1633 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-28 04:03:04,818 INFO L231 Difference]: Finished difference. Result has 108 places, 133 transitions, 1357 flow [2024-06-28 04:03:04,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1219, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1357, PETRI_PLACES=108, PETRI_TRANSITIONS=133} [2024-06-28 04:03:04,819 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 65 predicate places. [2024-06-28 04:03:04,820 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 133 transitions, 1357 flow [2024-06-28 04:03:04,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:03:04,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:03:04,821 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:03:04,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-28 04:03:04,822 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 04:03:04,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:03:04,822 INFO L85 PathProgramCache]: Analyzing trace with hash -984238240, now seen corresponding path program 1 times [2024-06-28 04:03:04,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:03:04,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033741036] [2024-06-28 04:03:04,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:03:04,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:03:04,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:03:06,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:03:06,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:03:06,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033741036] [2024-06-28 04:03:06,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033741036] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:03:06,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:03:06,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:03:06,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968068033] [2024-06-28 04:03:06,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:03:06,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:03:06,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:03:06,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:03:06,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:03:06,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:03:06,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 133 transitions, 1357 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:03:06,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:03:06,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:03:06,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:03:07,766 INFO L124 PetriNetUnfolderBase]: 1478/2310 cut-off events. [2024-06-28 04:03:07,766 INFO L125 PetriNetUnfolderBase]: For 35501/35538 co-relation queries the response was YES. [2024-06-28 04:03:07,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12645 conditions, 2310 events. 1478/2310 cut-off events. For 35501/35538 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 11250 event pairs, 414 based on Foata normal form. 27/2333 useless extension candidates. Maximal degree in co-relation 12597. Up to 2172 conditions per place. [2024-06-28 04:03:07,780 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 129 selfloop transitions, 11 changer transitions 0/152 dead transitions. [2024-06-28 04:03:07,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 152 transitions, 1711 flow [2024-06-28 04:03:07,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:03:07,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:03:07,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 97 transitions. [2024-06-28 04:03:07,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38492063492063494 [2024-06-28 04:03:07,781 INFO L175 Difference]: Start difference. First operand has 108 places, 133 transitions, 1357 flow. Second operand 6 states and 97 transitions. [2024-06-28 04:03:07,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 152 transitions, 1711 flow [2024-06-28 04:03:07,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 152 transitions, 1553 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-28 04:03:07,808 INFO L231 Difference]: Finished difference. Result has 109 places, 140 transitions, 1289 flow [2024-06-28 04:03:07,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1201, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1289, PETRI_PLACES=109, PETRI_TRANSITIONS=140} [2024-06-28 04:03:07,809 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 66 predicate places. [2024-06-28 04:03:07,809 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 140 transitions, 1289 flow [2024-06-28 04:03:07,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:03:07,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:03:07,809 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 04:03:07,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-28 04:03:07,810 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:03:07,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:03:07,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1317661235, now seen corresponding path program 1 times [2024-06-28 04:03:07,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:03:07,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632376204] [2024-06-28 04:03:07,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:03:07,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:03:07,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:03:09,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:03:09,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:03:09,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632376204] [2024-06-28 04:03:09,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632376204] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:03:09,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:03:09,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:03:09,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748309954] [2024-06-28 04:03:09,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:03:09,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:03:09,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:03:09,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:03:09,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:03:09,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:03:09,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 140 transitions, 1289 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:03:09,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:03:09,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:03:09,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:03:10,758 INFO L124 PetriNetUnfolderBase]: 1700/2626 cut-off events. [2024-06-28 04:03:10,758 INFO L125 PetriNetUnfolderBase]: For 37968/37972 co-relation queries the response was YES. [2024-06-28 04:03:10,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14268 conditions, 2626 events. 1700/2626 cut-off events. For 37968/37972 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 12681 event pairs, 412 based on Foata normal form. 8/2634 useless extension candidates. Maximal degree in co-relation 14217. Up to 2347 conditions per place. [2024-06-28 04:03:10,773 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 163 selfloop transitions, 41 changer transitions 0/208 dead transitions. [2024-06-28 04:03:10,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 208 transitions, 2040 flow [2024-06-28 04:03:10,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 04:03:10,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 04:03:10,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 179 transitions. [2024-06-28 04:03:10,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3874458874458874 [2024-06-28 04:03:10,775 INFO L175 Difference]: Start difference. First operand has 109 places, 140 transitions, 1289 flow. Second operand 11 states and 179 transitions. [2024-06-28 04:03:10,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 208 transitions, 2040 flow [2024-06-28 04:03:10,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 208 transitions, 2022 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-06-28 04:03:10,807 INFO L231 Difference]: Finished difference. Result has 125 places, 160 transitions, 1633 flow [2024-06-28 04:03:10,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1273, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1633, PETRI_PLACES=125, PETRI_TRANSITIONS=160} [2024-06-28 04:03:10,808 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 82 predicate places. [2024-06-28 04:03:10,808 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 160 transitions, 1633 flow [2024-06-28 04:03:10,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:03:10,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:03:10,808 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 04:03:10,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-28 04:03:10,808 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:03:10,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:03:10,809 INFO L85 PathProgramCache]: Analyzing trace with hash 120103337, now seen corresponding path program 2 times [2024-06-28 04:03:10,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:03:10,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033780428] [2024-06-28 04:03:10,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:03:10,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:03:10,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:03:12,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:03:12,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:03:12,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033780428] [2024-06-28 04:03:12,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033780428] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:03:12,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:03:12,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:03:12,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690620046] [2024-06-28 04:03:12,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:03:12,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:03:12,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:03:12,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:03:12,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:03:12,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:03:12,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 160 transitions, 1633 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:03:12,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:03:12,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:03:12,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:03:13,757 INFO L124 PetriNetUnfolderBase]: 1884/2932 cut-off events. [2024-06-28 04:03:13,758 INFO L125 PetriNetUnfolderBase]: For 45202/45208 co-relation queries the response was YES. [2024-06-28 04:03:13,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16485 conditions, 2932 events. 1884/2932 cut-off events. For 45202/45208 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 14805 event pairs, 456 based on Foata normal form. 10/2942 useless extension candidates. Maximal degree in co-relation 16425. Up to 2542 conditions per place. [2024-06-28 04:03:13,778 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 180 selfloop transitions, 69 changer transitions 0/253 dead transitions. [2024-06-28 04:03:13,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 253 transitions, 2686 flow [2024-06-28 04:03:13,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 04:03:13,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 04:03:13,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 203 transitions. [2024-06-28 04:03:13,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4027777777777778 [2024-06-28 04:03:13,781 INFO L175 Difference]: Start difference. First operand has 125 places, 160 transitions, 1633 flow. Second operand 12 states and 203 transitions. [2024-06-28 04:03:13,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 253 transitions, 2686 flow [2024-06-28 04:03:13,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 253 transitions, 2434 flow, removed 47 selfloop flow, removed 6 redundant places. [2024-06-28 04:03:13,828 INFO L231 Difference]: Finished difference. Result has 135 places, 193 transitions, 2008 flow [2024-06-28 04:03:13,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1455, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2008, PETRI_PLACES=135, PETRI_TRANSITIONS=193} [2024-06-28 04:03:13,829 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 92 predicate places. [2024-06-28 04:03:13,829 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 193 transitions, 2008 flow [2024-06-28 04:03:13,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:03:13,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:03:13,829 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 04:03:13,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-28 04:03:13,830 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:03:13,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:03:13,830 INFO L85 PathProgramCache]: Analyzing trace with hash -255986409, now seen corresponding path program 3 times [2024-06-28 04:03:13,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:03:13,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172736489] [2024-06-28 04:03:13,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:03:13,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:03:13,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:03:15,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:03:15,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:03:15,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172736489] [2024-06-28 04:03:15,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172736489] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:03:15,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:03:15,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:03:15,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501104367] [2024-06-28 04:03:15,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:03:15,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:03:15,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:03:15,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:03:15,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:03:15,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:03:15,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 193 transitions, 2008 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:03:15,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:03:15,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:03:15,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:03:16,709 INFO L124 PetriNetUnfolderBase]: 1904/2956 cut-off events. [2024-06-28 04:03:16,709 INFO L125 PetriNetUnfolderBase]: For 48447/48453 co-relation queries the response was YES. [2024-06-28 04:03:16,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17123 conditions, 2956 events. 1904/2956 cut-off events. For 48447/48453 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 14730 event pairs, 273 based on Foata normal form. 8/2963 useless extension candidates. Maximal degree in co-relation 17060. Up to 2288 conditions per place. [2024-06-28 04:03:16,732 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 133 selfloop transitions, 91 changer transitions 0/228 dead transitions. [2024-06-28 04:03:16,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 228 transitions, 2624 flow [2024-06-28 04:03:16,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:03:16,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:03:16,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-28 04:03:16,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-28 04:03:16,746 INFO L175 Difference]: Start difference. First operand has 135 places, 193 transitions, 2008 flow. Second operand 8 states and 135 transitions. [2024-06-28 04:03:16,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 228 transitions, 2624 flow [2024-06-28 04:03:16,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 228 transitions, 2483 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-28 04:03:16,802 INFO L231 Difference]: Finished difference. Result has 137 places, 195 transitions, 2113 flow [2024-06-28 04:03:16,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1867, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2113, PETRI_PLACES=137, PETRI_TRANSITIONS=195} [2024-06-28 04:03:16,803 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 94 predicate places. [2024-06-28 04:03:16,803 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 195 transitions, 2113 flow [2024-06-28 04:03:16,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:03:16,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:03:16,803 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 04:03:16,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-28 04:03:16,804 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:03:16,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:03:16,804 INFO L85 PathProgramCache]: Analyzing trace with hash 972555163, now seen corresponding path program 4 times [2024-06-28 04:03:16,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:03:16,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668019325] [2024-06-28 04:03:16,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:03:16,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:03:16,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:03:18,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:03:18,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:03:18,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668019325] [2024-06-28 04:03:18,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668019325] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:03:18,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:03:18,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:03:18,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572580104] [2024-06-28 04:03:18,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:03:18,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:03:18,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:03:18,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:03:18,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:03:18,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:03:18,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 195 transitions, 2113 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:03:18,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:03:18,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:03:18,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:03:19,618 INFO L124 PetriNetUnfolderBase]: 1924/2988 cut-off events. [2024-06-28 04:03:19,619 INFO L125 PetriNetUnfolderBase]: For 53858/53864 co-relation queries the response was YES. [2024-06-28 04:03:19,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17725 conditions, 2988 events. 1924/2988 cut-off events. For 53858/53864 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 14987 event pairs, 439 based on Foata normal form. 8/2995 useless extension candidates. Maximal degree in co-relation 17664. Up to 2623 conditions per place. [2024-06-28 04:03:19,637 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 153 selfloop transitions, 67 changer transitions 0/224 dead transitions. [2024-06-28 04:03:19,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 224 transitions, 2709 flow [2024-06-28 04:03:19,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:03:19,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:03:19,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-28 04:03:19,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41156462585034015 [2024-06-28 04:03:19,639 INFO L175 Difference]: Start difference. First operand has 137 places, 195 transitions, 2113 flow. Second operand 7 states and 121 transitions. [2024-06-28 04:03:19,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 224 transitions, 2709 flow [2024-06-28 04:03:19,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 224 transitions, 2483 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-28 04:03:19,701 INFO L231 Difference]: Finished difference. Result has 138 places, 197 transitions, 2080 flow [2024-06-28 04:03:19,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1895, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2080, PETRI_PLACES=138, PETRI_TRANSITIONS=197} [2024-06-28 04:03:19,702 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 95 predicate places. [2024-06-28 04:03:19,702 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 197 transitions, 2080 flow [2024-06-28 04:03:19,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:03:19,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:03:19,702 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:03:19,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-28 04:03:19,703 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:03:19,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:03:19,703 INFO L85 PathProgramCache]: Analyzing trace with hash 972407293, now seen corresponding path program 5 times [2024-06-28 04:03:19,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:03:19,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617505148] [2024-06-28 04:03:19,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:03:19,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:03:19,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:03:21,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:03:21,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:03:21,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617505148] [2024-06-28 04:03:21,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617505148] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:03:21,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:03:21,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:03:21,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525038801] [2024-06-28 04:03:21,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:03:21,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:03:21,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:03:21,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:03:21,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:03:21,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:03:21,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 197 transitions, 2080 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:03:21,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:03:21,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:03:21,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:03:22,750 INFO L124 PetriNetUnfolderBase]: 1944/3020 cut-off events. [2024-06-28 04:03:22,750 INFO L125 PetriNetUnfolderBase]: For 48945/48951 co-relation queries the response was YES. [2024-06-28 04:03:22,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17386 conditions, 3020 events. 1944/3020 cut-off events. For 48945/48951 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 15117 event pairs, 421 based on Foata normal form. 8/3027 useless extension candidates. Maximal degree in co-relation 17324. Up to 2612 conditions per place. [2024-06-28 04:03:22,773 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 153 selfloop transitions, 69 changer transitions 0/226 dead transitions. [2024-06-28 04:03:22,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 226 transitions, 2672 flow [2024-06-28 04:03:22,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:03:22,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:03:22,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-28 04:03:22,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-28 04:03:22,775 INFO L175 Difference]: Start difference. First operand has 138 places, 197 transitions, 2080 flow. Second operand 7 states and 119 transitions. [2024-06-28 04:03:22,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 226 transitions, 2672 flow [2024-06-28 04:03:22,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 226 transitions, 2505 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-28 04:03:22,843 INFO L231 Difference]: Finished difference. Result has 140 places, 199 transitions, 2109 flow [2024-06-28 04:03:22,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1913, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2109, PETRI_PLACES=140, PETRI_TRANSITIONS=199} [2024-06-28 04:03:22,843 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 97 predicate places. [2024-06-28 04:03:22,843 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 199 transitions, 2109 flow [2024-06-28 04:03:22,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:03:22,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:03:22,844 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 04:03:22,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-28 04:03:22,844 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:03:22,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:03:22,845 INFO L85 PathProgramCache]: Analyzing trace with hash 977318283, now seen corresponding path program 1 times [2024-06-28 04:03:22,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:03:22,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125886840] [2024-06-28 04:03:22,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:03:22,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:03:22,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:03:25,254 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 04:03:25,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:03:25,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125886840] [2024-06-28 04:03:25,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125886840] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:03:25,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:03:25,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 04:03:25,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665477753] [2024-06-28 04:03:25,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:03:25,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 04:03:25,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:03:25,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 04:03:25,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-28 04:03:25,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:03:25,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 199 transitions, 2109 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:03:25,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:03:25,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:03:25,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:03:26,331 INFO L124 PetriNetUnfolderBase]: 2012/3148 cut-off events. [2024-06-28 04:03:26,332 INFO L125 PetriNetUnfolderBase]: For 57753/57759 co-relation queries the response was YES. [2024-06-28 04:03:26,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18287 conditions, 3148 events. 2012/3148 cut-off events. For 57753/57759 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 16106 event pairs, 396 based on Foata normal form. 20/3167 useless extension candidates. Maximal degree in co-relation 18224. Up to 2552 conditions per place. [2024-06-28 04:03:26,355 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 158 selfloop transitions, 75 changer transitions 0/237 dead transitions. [2024-06-28 04:03:26,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 237 transitions, 2775 flow [2024-06-28 04:03:26,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:03:26,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:03:26,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-28 04:03:26,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-28 04:03:26,372 INFO L175 Difference]: Start difference. First operand has 140 places, 199 transitions, 2109 flow. Second operand 8 states and 143 transitions. [2024-06-28 04:03:26,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 237 transitions, 2775 flow [2024-06-28 04:03:26,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 237 transitions, 2603 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-28 04:03:26,457 INFO L231 Difference]: Finished difference. Result has 143 places, 200 transitions, 2135 flow [2024-06-28 04:03:26,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1937, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2135, PETRI_PLACES=143, PETRI_TRANSITIONS=200} [2024-06-28 04:03:26,462 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 100 predicate places. [2024-06-28 04:03:26,462 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 200 transitions, 2135 flow [2024-06-28 04:03:26,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:03:26,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:03:26,463 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 04:03:26,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-28 04:03:26,463 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:03:26,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:03:26,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1240733645, now seen corresponding path program 6 times [2024-06-28 04:03:26,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:03:26,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650742397] [2024-06-28 04:03:26,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:03:26,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:03:26,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:03:28,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:03:28,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:03:28,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650742397] [2024-06-28 04:03:28,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650742397] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:03:28,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:03:28,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:03:28,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730073328] [2024-06-28 04:03:28,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:03:28,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:03:28,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:03:28,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:03:28,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:03:28,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:03:28,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 200 transitions, 2135 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:03:28,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:03:28,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:03:28,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:03:29,414 INFO L124 PetriNetUnfolderBase]: 2032/3180 cut-off events. [2024-06-28 04:03:29,415 INFO L125 PetriNetUnfolderBase]: For 59118/59124 co-relation queries the response was YES. [2024-06-28 04:03:29,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18697 conditions, 3180 events. 2032/3180 cut-off events. For 59118/59124 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 16300 event pairs, 455 based on Foata normal form. 8/3187 useless extension candidates. Maximal degree in co-relation 18633. Up to 2786 conditions per place. [2024-06-28 04:03:29,436 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 144 selfloop transitions, 85 changer transitions 0/233 dead transitions. [2024-06-28 04:03:29,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 233 transitions, 2763 flow [2024-06-28 04:03:29,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:03:29,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:03:29,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-28 04:03:29,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-28 04:03:29,441 INFO L175 Difference]: Start difference. First operand has 143 places, 200 transitions, 2135 flow. Second operand 8 states and 134 transitions. [2024-06-28 04:03:29,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 233 transitions, 2763 flow [2024-06-28 04:03:29,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 233 transitions, 2609 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-28 04:03:29,512 INFO L231 Difference]: Finished difference. Result has 145 places, 202 transitions, 2214 flow [2024-06-28 04:03:29,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1981, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2214, PETRI_PLACES=145, PETRI_TRANSITIONS=202} [2024-06-28 04:03:29,513 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 102 predicate places. [2024-06-28 04:03:29,514 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 202 transitions, 2214 flow [2024-06-28 04:03:29,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:03:29,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:03:29,514 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 04:03:29,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-28 04:03:29,514 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:03:29,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:03:29,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1240737365, now seen corresponding path program 7 times [2024-06-28 04:03:29,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:03:29,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148526044] [2024-06-28 04:03:29,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:03:29,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:03:29,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:03:31,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:03:31,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:03:31,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148526044] [2024-06-28 04:03:31,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148526044] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:03:31,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:03:31,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:03:31,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257467301] [2024-06-28 04:03:31,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:03:31,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:03:31,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:03:31,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:03:31,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:03:31,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:03:31,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 202 transitions, 2214 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:03:31,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:03:31,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:03:31,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:03:32,406 INFO L124 PetriNetUnfolderBase]: 2052/3212 cut-off events. [2024-06-28 04:03:32,406 INFO L125 PetriNetUnfolderBase]: For 63607/63613 co-relation queries the response was YES. [2024-06-28 04:03:32,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19172 conditions, 3212 events. 2052/3212 cut-off events. For 63607/63613 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 16524 event pairs, 443 based on Foata normal form. 8/3219 useless extension candidates. Maximal degree in co-relation 19107. Up to 2823 conditions per place. [2024-06-28 04:03:32,433 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 154 selfloop transitions, 78 changer transitions 0/236 dead transitions. [2024-06-28 04:03:32,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 236 transitions, 2854 flow [2024-06-28 04:03:32,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:03:32,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:03:32,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-28 04:03:32,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-28 04:03:32,435 INFO L175 Difference]: Start difference. First operand has 145 places, 202 transitions, 2214 flow. Second operand 8 states and 134 transitions. [2024-06-28 04:03:32,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 236 transitions, 2854 flow [2024-06-28 04:03:32,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 236 transitions, 2643 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-28 04:03:32,519 INFO L231 Difference]: Finished difference. Result has 147 places, 204 transitions, 2224 flow [2024-06-28 04:03:32,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2003, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2224, PETRI_PLACES=147, PETRI_TRANSITIONS=204} [2024-06-28 04:03:32,520 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 104 predicate places. [2024-06-28 04:03:32,520 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 204 transitions, 2224 flow [2024-06-28 04:03:32,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:03:32,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:03:32,520 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 04:03:32,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-28 04:03:32,521 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:03:32,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:03:32,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1235227115, now seen corresponding path program 8 times [2024-06-28 04:03:32,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:03:32,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604485938] [2024-06-28 04:03:32,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:03:32,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:03:32,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:03:34,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:03:34,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:03:34,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604485938] [2024-06-28 04:03:34,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604485938] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:03:34,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:03:34,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:03:34,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885691638] [2024-06-28 04:03:34,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:03:34,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:03:34,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:03:34,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:03:34,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:03:34,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:03:34,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 204 transitions, 2224 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:03:34,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:03:34,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:03:34,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:03:35,673 INFO L124 PetriNetUnfolderBase]: 2111/3311 cut-off events. [2024-06-28 04:03:35,674 INFO L125 PetriNetUnfolderBase]: For 68905/68909 co-relation queries the response was YES. [2024-06-28 04:03:35,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19872 conditions, 3311 events. 2111/3311 cut-off events. For 68905/68909 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 17306 event pairs, 468 based on Foata normal form. 8/3319 useless extension candidates. Maximal degree in co-relation 19806. Up to 2902 conditions per place. [2024-06-28 04:03:35,705 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 168 selfloop transitions, 90 changer transitions 0/262 dead transitions. [2024-06-28 04:03:35,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 262 transitions, 3057 flow [2024-06-28 04:03:35,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:03:35,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:03:35,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-28 04:03:35,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119047619047619 [2024-06-28 04:03:35,706 INFO L175 Difference]: Start difference. First operand has 147 places, 204 transitions, 2224 flow. Second operand 10 states and 173 transitions. [2024-06-28 04:03:35,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 262 transitions, 3057 flow [2024-06-28 04:03:35,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 262 transitions, 2850 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-28 04:03:35,789 INFO L231 Difference]: Finished difference. Result has 153 places, 215 transitions, 2380 flow [2024-06-28 04:03:35,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2021, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2380, PETRI_PLACES=153, PETRI_TRANSITIONS=215} [2024-06-28 04:03:35,789 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 110 predicate places. [2024-06-28 04:03:35,790 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 215 transitions, 2380 flow [2024-06-28 04:03:35,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:03:35,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:03:35,790 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 04:03:35,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-28 04:03:35,790 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:03:35,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:03:35,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1030108431, now seen corresponding path program 2 times [2024-06-28 04:03:35,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:03:35,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767015683] [2024-06-28 04:03:35,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:03:35,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:03:35,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:03:38,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:03:38,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:03:38,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767015683] [2024-06-28 04:03:38,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767015683] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:03:38,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:03:38,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 04:03:38,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130524756] [2024-06-28 04:03:38,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:03:38,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 04:03:38,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:03:38,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 04:03:38,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-28 04:03:38,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:03:38,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 215 transitions, 2380 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:03:38,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:03:38,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:03:38,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:03:39,334 INFO L124 PetriNetUnfolderBase]: 2275/3585 cut-off events. [2024-06-28 04:03:39,334 INFO L125 PetriNetUnfolderBase]: For 84593/84595 co-relation queries the response was YES. [2024-06-28 04:03:39,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22020 conditions, 3585 events. 2275/3585 cut-off events. For 84593/84595 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 19009 event pairs, 450 based on Foata normal form. 12/3596 useless extension candidates. Maximal degree in co-relation 21951. Up to 2584 conditions per place. [2024-06-28 04:03:39,362 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 145 selfloop transitions, 115 changer transitions 0/264 dead transitions. [2024-06-28 04:03:39,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 264 transitions, 3310 flow [2024-06-28 04:03:39,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:03:39,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:03:39,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-28 04:03:39,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-28 04:03:39,365 INFO L175 Difference]: Start difference. First operand has 153 places, 215 transitions, 2380 flow. Second operand 9 states and 160 transitions. [2024-06-28 04:03:39,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 264 transitions, 3310 flow [2024-06-28 04:03:39,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 264 transitions, 3096 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-28 04:03:39,485 INFO L231 Difference]: Finished difference. Result has 157 places, 218 transitions, 2529 flow [2024-06-28 04:03:39,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2168, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2529, PETRI_PLACES=157, PETRI_TRANSITIONS=218} [2024-06-28 04:03:39,486 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 114 predicate places. [2024-06-28 04:03:39,486 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 218 transitions, 2529 flow [2024-06-28 04:03:39,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:03:39,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:03:39,487 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 04:03:39,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-28 04:03:39,487 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:03:39,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:03:39,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1382491561, now seen corresponding path program 3 times [2024-06-28 04:03:39,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:03:39,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597660787] [2024-06-28 04:03:39,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:03:39,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:03:39,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:03:41,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:03:41,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:03:41,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597660787] [2024-06-28 04:03:41,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597660787] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:03:41,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:03:41,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 04:03:41,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579953375] [2024-06-28 04:03:41,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:03:41,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 04:03:41,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:03:41,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 04:03:41,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-28 04:03:41,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:03:41,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 218 transitions, 2529 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:03:41,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:03:41,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:03:41,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:03:43,150 INFO L124 PetriNetUnfolderBase]: 2343/3701 cut-off events. [2024-06-28 04:03:43,150 INFO L125 PetriNetUnfolderBase]: For 95112/95114 co-relation queries the response was YES. [2024-06-28 04:03:43,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23122 conditions, 3701 events. 2343/3701 cut-off events. For 95112/95114 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 19966 event pairs, 525 based on Foata normal form. 16/3716 useless extension candidates. Maximal degree in co-relation 23051. Up to 3012 conditions per place. [2024-06-28 04:03:43,179 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 143 selfloop transitions, 112 changer transitions 0/259 dead transitions. [2024-06-28 04:03:43,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 259 transitions, 3252 flow [2024-06-28 04:03:43,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:03:43,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:03:43,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-28 04:03:43,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-28 04:03:43,181 INFO L175 Difference]: Start difference. First operand has 157 places, 218 transitions, 2529 flow. Second operand 9 states and 155 transitions. [2024-06-28 04:03:43,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 259 transitions, 3252 flow [2024-06-28 04:03:43,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 259 transitions, 3076 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-28 04:03:43,289 INFO L231 Difference]: Finished difference. Result has 161 places, 219 transitions, 2631 flow [2024-06-28 04:03:43,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2355, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2631, PETRI_PLACES=161, PETRI_TRANSITIONS=219} [2024-06-28 04:03:43,289 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 118 predicate places. [2024-06-28 04:03:43,289 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 219 transitions, 2631 flow [2024-06-28 04:03:43,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:03:43,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:03:43,290 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 04:03:43,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-28 04:03:43,290 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:03:43,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:03:43,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1382693371, now seen corresponding path program 4 times [2024-06-28 04:03:43,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:03:43,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941694657] [2024-06-28 04:03:43,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:03:43,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:03:43,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:03:45,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:03:45,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:03:45,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941694657] [2024-06-28 04:03:45,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941694657] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:03:45,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:03:45,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 04:03:45,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471681645] [2024-06-28 04:03:45,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:03:45,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 04:03:45,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:03:45,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 04:03:45,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-28 04:03:45,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:03:45,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 219 transitions, 2631 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:03:45,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:03:45,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:03:45,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:03:47,294 INFO L124 PetriNetUnfolderBase]: 2451/3889 cut-off events. [2024-06-28 04:03:47,294 INFO L125 PetriNetUnfolderBase]: For 108831/108833 co-relation queries the response was YES. [2024-06-28 04:03:47,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24475 conditions, 3889 events. 2451/3889 cut-off events. For 108831/108833 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 21458 event pairs, 553 based on Foata normal form. 32/3920 useless extension candidates. Maximal degree in co-relation 24402. Up to 3145 conditions per place. [2024-06-28 04:03:47,321 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 153 selfloop transitions, 104 changer transitions 0/261 dead transitions. [2024-06-28 04:03:47,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 261 transitions, 3416 flow [2024-06-28 04:03:47,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:03:47,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:03:47,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-28 04:03:47,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-28 04:03:47,324 INFO L175 Difference]: Start difference. First operand has 161 places, 219 transitions, 2631 flow. Second operand 9 states and 154 transitions. [2024-06-28 04:03:47,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 261 transitions, 3416 flow [2024-06-28 04:03:47,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 261 transitions, 3173 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-28 04:03:47,433 INFO L231 Difference]: Finished difference. Result has 163 places, 221 transitions, 2700 flow [2024-06-28 04:03:47,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2388, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2700, PETRI_PLACES=163, PETRI_TRANSITIONS=221} [2024-06-28 04:03:47,434 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 120 predicate places. [2024-06-28 04:03:47,434 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 221 transitions, 2700 flow [2024-06-28 04:03:47,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:03:47,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:03:47,435 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 04:03:47,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-28 04:03:47,435 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:03:47,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:03:47,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1240583543, now seen corresponding path program 5 times [2024-06-28 04:03:47,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:03:47,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974255502] [2024-06-28 04:03:47,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:03:47,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:03:47,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:03:49,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:03:49,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:03:49,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974255502] [2024-06-28 04:03:49,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974255502] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:03:49,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:03:49,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 04:03:49,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826215364] [2024-06-28 04:03:49,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:03:49,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 04:03:49,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:03:49,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 04:03:49,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-28 04:03:49,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:03:49,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 221 transitions, 2700 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:03:49,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:03:49,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:03:49,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:03:51,100 INFO L124 PetriNetUnfolderBase]: 2423/3851 cut-off events. [2024-06-28 04:03:51,101 INFO L125 PetriNetUnfolderBase]: For 100222/100228 co-relation queries the response was YES. [2024-06-28 04:03:51,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23773 conditions, 3851 events. 2423/3851 cut-off events. For 100222/100228 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 21260 event pairs, 529 based on Foata normal form. 20/3870 useless extension candidates. Maximal degree in co-relation 23699. Up to 3350 conditions per place. [2024-06-28 04:03:51,128 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 169 selfloop transitions, 87 changer transitions 0/260 dead transitions. [2024-06-28 04:03:51,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 260 transitions, 3378 flow [2024-06-28 04:03:51,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:03:51,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:03:51,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-28 04:03:51,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-06-28 04:03:51,130 INFO L175 Difference]: Start difference. First operand has 163 places, 221 transitions, 2700 flow. Second operand 9 states and 151 transitions. [2024-06-28 04:03:51,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 260 transitions, 3378 flow [2024-06-28 04:03:51,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 260 transitions, 3123 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-28 04:03:51,249 INFO L231 Difference]: Finished difference. Result has 165 places, 221 transitions, 2626 flow [2024-06-28 04:03:51,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2445, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2626, PETRI_PLACES=165, PETRI_TRANSITIONS=221} [2024-06-28 04:03:51,249 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 122 predicate places. [2024-06-28 04:03:51,249 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 221 transitions, 2626 flow [2024-06-28 04:03:51,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:03:51,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:03:51,250 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 04:03:51,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-28 04:03:51,250 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 04:03:51,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:03:51,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1394326114, now seen corresponding path program 1 times [2024-06-28 04:03:51,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:03:51,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508265097] [2024-06-28 04:03:51,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:03:51,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:03:51,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:03:53,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:03:53,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:03:53,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508265097] [2024-06-28 04:03:53,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508265097] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:03:53,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:03:53,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 04:03:53,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164614341] [2024-06-28 04:03:53,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:03:53,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 04:03:53,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:03:53,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 04:03:53,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 04:03:53,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:03:53,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 221 transitions, 2626 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 04:03:53,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:03:53,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:03:53,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:03:54,402 INFO L124 PetriNetUnfolderBase]: 2324/3766 cut-off events. [2024-06-28 04:03:54,402 INFO L125 PetriNetUnfolderBase]: For 93017/93032 co-relation queries the response was YES. [2024-06-28 04:03:54,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23031 conditions, 3766 events. 2324/3766 cut-off events. For 93017/93032 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 21295 event pairs, 648 based on Foata normal form. 16/3778 useless extension candidates. Maximal degree in co-relation 22956. Up to 3543 conditions per place. [2024-06-28 04:03:54,430 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 203 selfloop transitions, 34 changer transitions 0/247 dead transitions. [2024-06-28 04:03:54,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 247 transitions, 3298 flow [2024-06-28 04:03:54,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:03:54,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:03:54,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 103 transitions. [2024-06-28 04:03:54,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4087301587301587 [2024-06-28 04:03:54,432 INFO L175 Difference]: Start difference. First operand has 165 places, 221 transitions, 2626 flow. Second operand 6 states and 103 transitions. [2024-06-28 04:03:54,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 247 transitions, 3298 flow [2024-06-28 04:03:54,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 247 transitions, 3119 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-28 04:03:54,561 INFO L231 Difference]: Finished difference. Result has 165 places, 230 transitions, 2618 flow [2024-06-28 04:03:54,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2447, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2618, PETRI_PLACES=165, PETRI_TRANSITIONS=230} [2024-06-28 04:03:54,562 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 122 predicate places. [2024-06-28 04:03:54,562 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 230 transitions, 2618 flow [2024-06-28 04:03:54,562 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 04:03:54,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:03:54,562 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 04:03:54,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-28 04:03:54,562 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 04:03:54,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:03:54,563 INFO L85 PathProgramCache]: Analyzing trace with hash -415340224, now seen corresponding path program 2 times [2024-06-28 04:03:54,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:03:54,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816695763] [2024-06-28 04:03:54,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:03:54,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:03:54,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:03:56,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:03:56,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:03:56,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816695763] [2024-06-28 04:03:56,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816695763] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:03:56,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:03:56,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 04:03:56,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685526783] [2024-06-28 04:03:56,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:03:56,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 04:03:56,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:03:56,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 04:03:56,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 04:03:56,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:03:56,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 230 transitions, 2618 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 04:03:56,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:03:56,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:03:56,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:03:57,651 INFO L124 PetriNetUnfolderBase]: 2320/3759 cut-off events. [2024-06-28 04:03:57,652 INFO L125 PetriNetUnfolderBase]: For 96388/96440 co-relation queries the response was YES. [2024-06-28 04:03:57,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23096 conditions, 3759 events. 2320/3759 cut-off events. For 96388/96440 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 21325 event pairs, 660 based on Foata normal form. 42/3793 useless extension candidates. Maximal degree in co-relation 23019. Up to 3538 conditions per place. [2024-06-28 04:03:57,683 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 197 selfloop transitions, 34 changer transitions 0/241 dead transitions. [2024-06-28 04:03:57,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 241 transitions, 3120 flow [2024-06-28 04:03:57,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:03:57,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:03:57,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 98 transitions. [2024-06-28 04:03:57,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-28 04:03:57,684 INFO L175 Difference]: Start difference. First operand has 165 places, 230 transitions, 2618 flow. Second operand 6 states and 98 transitions. [2024-06-28 04:03:57,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 241 transitions, 3120 flow [2024-06-28 04:03:57,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 241 transitions, 3076 flow, removed 21 selfloop flow, removed 1 redundant places. [2024-06-28 04:03:57,831 INFO L231 Difference]: Finished difference. Result has 170 places, 230 transitions, 2649 flow [2024-06-28 04:03:57,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2574, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2649, PETRI_PLACES=170, PETRI_TRANSITIONS=230} [2024-06-28 04:03:57,831 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 127 predicate places. [2024-06-28 04:03:57,832 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 230 transitions, 2649 flow [2024-06-28 04:03:57,832 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 04:03:57,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:03:57,832 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 04:03:57,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-28 04:03:57,832 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:03:57,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:03:57,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1679354061, now seen corresponding path program 1 times [2024-06-28 04:03:57,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:03:57,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689518488] [2024-06-28 04:03:57,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:03:57,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:03:57,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:03:59,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:03:59,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:03:59,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689518488] [2024-06-28 04:03:59,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689518488] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:03:59,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:03:59,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 04:03:59,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462921268] [2024-06-28 04:03:59,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:03:59,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 04:03:59,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:03:59,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 04:03:59,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-28 04:04:00,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:04:00,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 230 transitions, 2649 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:04:00,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:04:00,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:04:00,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:04:01,380 INFO L124 PetriNetUnfolderBase]: 2475/3941 cut-off events. [2024-06-28 04:04:01,380 INFO L125 PetriNetUnfolderBase]: For 108386/108392 co-relation queries the response was YES. [2024-06-28 04:04:01,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24234 conditions, 3941 events. 2475/3941 cut-off events. For 108386/108392 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 21904 event pairs, 323 based on Foata normal form. 16/3956 useless extension candidates. Maximal degree in co-relation 24154. Up to 3139 conditions per place. [2024-06-28 04:04:01,409 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 176 selfloop transitions, 92 changer transitions 0/272 dead transitions. [2024-06-28 04:04:01,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 272 transitions, 3385 flow [2024-06-28 04:04:01,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:04:01,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:04:01,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-28 04:04:01,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-06-28 04:04:01,412 INFO L175 Difference]: Start difference. First operand has 170 places, 230 transitions, 2649 flow. Second operand 9 states and 151 transitions. [2024-06-28 04:04:01,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 272 transitions, 3385 flow [2024-06-28 04:04:01,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 272 transitions, 3286 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-28 04:04:01,528 INFO L231 Difference]: Finished difference. Result has 174 places, 231 transitions, 2791 flow [2024-06-28 04:04:01,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2550, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2791, PETRI_PLACES=174, PETRI_TRANSITIONS=231} [2024-06-28 04:04:01,528 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 131 predicate places. [2024-06-28 04:04:01,528 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 231 transitions, 2791 flow [2024-06-28 04:04:01,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:04:01,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:04:01,529 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 04:04:01,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-28 04:04:01,529 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:04:01,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:04:01,529 INFO L85 PathProgramCache]: Analyzing trace with hash 227329043, now seen corresponding path program 2 times [2024-06-28 04:04:01,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:04:01,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405869013] [2024-06-28 04:04:01,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:04:01,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:04:01,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:04:04,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:04:04,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:04:04,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405869013] [2024-06-28 04:04:04,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405869013] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:04:04,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:04:04,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 04:04:04,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104183961] [2024-06-28 04:04:04,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:04:04,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 04:04:04,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:04:04,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 04:04:04,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-28 04:04:04,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:04:04,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 231 transitions, 2791 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:04:04,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:04:04,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:04:04,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:04:05,324 INFO L124 PetriNetUnfolderBase]: 2523/4025 cut-off events. [2024-06-28 04:04:05,324 INFO L125 PetriNetUnfolderBase]: For 116723/116729 co-relation queries the response was YES. [2024-06-28 04:04:05,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25179 conditions, 4025 events. 2523/4025 cut-off events. For 116723/116729 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 22575 event pairs, 533 based on Foata normal form. 16/4040 useless extension candidates. Maximal degree in co-relation 25099. Up to 3515 conditions per place. [2024-06-28 04:04:05,357 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 193 selfloop transitions, 70 changer transitions 0/267 dead transitions. [2024-06-28 04:04:05,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 267 transitions, 3499 flow [2024-06-28 04:04:05,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:04:05,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:04:05,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-28 04:04:05,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-28 04:04:05,359 INFO L175 Difference]: Start difference. First operand has 174 places, 231 transitions, 2791 flow. Second operand 8 states and 135 transitions. [2024-06-28 04:04:05,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 267 transitions, 3499 flow [2024-06-28 04:04:05,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 267 transitions, 3282 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-28 04:04:05,599 INFO L231 Difference]: Finished difference. Result has 175 places, 232 transitions, 2770 flow [2024-06-28 04:04:05,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2574, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2770, PETRI_PLACES=175, PETRI_TRANSITIONS=232} [2024-06-28 04:04:05,600 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 132 predicate places. [2024-06-28 04:04:05,600 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 232 transitions, 2770 flow [2024-06-28 04:04:05,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:04:05,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:04:05,600 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 04:04:05,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-28 04:04:05,600 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:04:05,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:04:05,601 INFO L85 PathProgramCache]: Analyzing trace with hash -80238009, now seen corresponding path program 3 times [2024-06-28 04:04:05,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:04:05,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497898636] [2024-06-28 04:04:05,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:04:05,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:04:05,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:04:07,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:04:07,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:04:07,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497898636] [2024-06-28 04:04:07,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497898636] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:04:07,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:04:07,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 04:04:07,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056774855] [2024-06-28 04:04:07,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:04:07,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 04:04:07,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:04:07,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 04:04:07,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-28 04:04:08,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:04:08,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 232 transitions, 2770 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:04:08,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:04:08,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:04:08,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:04:09,366 INFO L124 PetriNetUnfolderBase]: 2571/4109 cut-off events. [2024-06-28 04:04:09,366 INFO L125 PetriNetUnfolderBase]: For 125159/125165 co-relation queries the response was YES. [2024-06-28 04:04:09,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25539 conditions, 4109 events. 2571/4109 cut-off events. For 125159/125165 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 23258 event pairs, 557 based on Foata normal form. 16/4124 useless extension candidates. Maximal degree in co-relation 25458. Up to 3625 conditions per place. [2024-06-28 04:04:09,401 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 182 selfloop transitions, 86 changer transitions 0/272 dead transitions. [2024-06-28 04:04:09,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 272 transitions, 3506 flow [2024-06-28 04:04:09,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:04:09,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:04:09,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-28 04:04:09,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-28 04:04:09,403 INFO L175 Difference]: Start difference. First operand has 175 places, 232 transitions, 2770 flow. Second operand 9 states and 150 transitions. [2024-06-28 04:04:09,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 272 transitions, 3506 flow [2024-06-28 04:04:09,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 272 transitions, 3328 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-28 04:04:09,558 INFO L231 Difference]: Finished difference. Result has 178 places, 233 transitions, 2822 flow [2024-06-28 04:04:09,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2592, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2822, PETRI_PLACES=178, PETRI_TRANSITIONS=233} [2024-06-28 04:04:09,568 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 135 predicate places. [2024-06-28 04:04:09,568 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 233 transitions, 2822 flow [2024-06-28 04:04:09,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:04:09,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:04:09,568 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 04:04:09,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-28 04:04:09,568 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:04:09,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:04:09,569 INFO L85 PathProgramCache]: Analyzing trace with hash -84821979, now seen corresponding path program 4 times [2024-06-28 04:04:09,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:04:09,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442104601] [2024-06-28 04:04:09,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:04:09,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:04:09,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:04:11,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:04:11,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:04:11,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442104601] [2024-06-28 04:04:11,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442104601] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:04:11,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:04:11,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 04:04:11,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204728950] [2024-06-28 04:04:11,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:04:11,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 04:04:11,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:04:11,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 04:04:11,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-28 04:04:11,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:04:11,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 233 transitions, 2822 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:04:11,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:04:11,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:04:11,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:04:13,096 INFO L124 PetriNetUnfolderBase]: 2551/4077 cut-off events. [2024-06-28 04:04:13,096 INFO L125 PetriNetUnfolderBase]: For 121824/121830 co-relation queries the response was YES. [2024-06-28 04:04:13,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24919 conditions, 4077 events. 2551/4077 cut-off events. For 121824/121830 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 23050 event pairs, 537 based on Foata normal form. 16/4092 useless extension candidates. Maximal degree in co-relation 24837. Up to 3598 conditions per place. [2024-06-28 04:04:13,130 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 189 selfloop transitions, 79 changer transitions 0/272 dead transitions. [2024-06-28 04:04:13,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 272 transitions, 3446 flow [2024-06-28 04:04:13,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:04:13,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:04:13,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-28 04:04:13,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3941798941798942 [2024-06-28 04:04:13,131 INFO L175 Difference]: Start difference. First operand has 178 places, 233 transitions, 2822 flow. Second operand 9 states and 149 transitions. [2024-06-28 04:04:13,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 272 transitions, 3446 flow [2024-06-28 04:04:13,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 272 transitions, 3234 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-28 04:04:13,309 INFO L231 Difference]: Finished difference. Result has 179 places, 232 transitions, 2708 flow [2024-06-28 04:04:13,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2546, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2708, PETRI_PLACES=179, PETRI_TRANSITIONS=232} [2024-06-28 04:04:13,310 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 136 predicate places. [2024-06-28 04:04:13,310 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 232 transitions, 2708 flow [2024-06-28 04:04:13,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:04:13,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:04:13,310 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 04:04:13,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-28 04:04:13,311 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 04:04:13,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:04:13,311 INFO L85 PathProgramCache]: Analyzing trace with hash 2028365403, now seen corresponding path program 1 times [2024-06-28 04:04:13,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:04:13,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007035737] [2024-06-28 04:04:13,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:04:13,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:04:13,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:04:15,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:04:15,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:04:15,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007035737] [2024-06-28 04:04:15,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007035737] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:04:15,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:04:15,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:04:15,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559513715] [2024-06-28 04:04:15,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:04:15,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:04:15,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:04:15,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:04:15,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:04:15,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:04:15,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 232 transitions, 2708 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 04:04:15,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:04:15,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:04:15,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:04:16,472 INFO L124 PetriNetUnfolderBase]: 2447/3936 cut-off events. [2024-06-28 04:04:16,472 INFO L125 PetriNetUnfolderBase]: For 120621/120636 co-relation queries the response was YES. [2024-06-28 04:04:16,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24124 conditions, 3936 events. 2447/3936 cut-off events. For 120621/120636 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 22493 event pairs, 537 based on Foata normal form. 14/3936 useless extension candidates. Maximal degree in co-relation 24041. Up to 3678 conditions per place. [2024-06-28 04:04:16,505 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 191 selfloop transitions, 39 changer transitions 0/247 dead transitions. [2024-06-28 04:04:16,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 247 transitions, 3242 flow [2024-06-28 04:04:16,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:04:16,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:04:16,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 99 transitions. [2024-06-28 04:04:16,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-28 04:04:16,507 INFO L175 Difference]: Start difference. First operand has 179 places, 232 transitions, 2708 flow. Second operand 6 states and 99 transitions. [2024-06-28 04:04:16,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 247 transitions, 3242 flow [2024-06-28 04:04:16,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 247 transitions, 3042 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-28 04:04:16,658 INFO L231 Difference]: Finished difference. Result has 178 places, 235 transitions, 2635 flow [2024-06-28 04:04:16,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2508, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2635, PETRI_PLACES=178, PETRI_TRANSITIONS=235} [2024-06-28 04:04:16,659 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 135 predicate places. [2024-06-28 04:04:16,659 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 235 transitions, 2635 flow [2024-06-28 04:04:16,659 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 04:04:16,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:04:16,660 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 04:04:16,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-28 04:04:16,660 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 04:04:16,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:04:16,660 INFO L85 PathProgramCache]: Analyzing trace with hash -97072357, now seen corresponding path program 2 times [2024-06-28 04:04:16,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:04:16,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503411001] [2024-06-28 04:04:16,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:04:16,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:04:16,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:04:18,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:04:18,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:04:18,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503411001] [2024-06-28 04:04:18,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503411001] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:04:18,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:04:18,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:04:18,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343009062] [2024-06-28 04:04:18,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:04:18,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:04:18,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:04:18,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:04:18,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:04:18,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:04:18,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 235 transitions, 2635 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 04:04:18,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:04:18,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:04:18,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:04:20,260 INFO L124 PetriNetUnfolderBase]: 2435/3920 cut-off events. [2024-06-28 04:04:20,260 INFO L125 PetriNetUnfolderBase]: For 119217/119232 co-relation queries the response was YES. [2024-06-28 04:04:20,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23902 conditions, 3920 events. 2435/3920 cut-off events. For 119217/119232 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 22384 event pairs, 535 based on Foata normal form. 14/3920 useless extension candidates. Maximal degree in co-relation 23818. Up to 3656 conditions per place. [2024-06-28 04:04:20,289 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 193 selfloop transitions, 42 changer transitions 0/252 dead transitions. [2024-06-28 04:04:20,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 252 transitions, 3189 flow [2024-06-28 04:04:20,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:04:20,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:04:20,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-28 04:04:20,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-28 04:04:20,291 INFO L175 Difference]: Start difference. First operand has 178 places, 235 transitions, 2635 flow. Second operand 7 states and 112 transitions. [2024-06-28 04:04:20,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 252 transitions, 3189 flow [2024-06-28 04:04:20,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 252 transitions, 3088 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-28 04:04:20,459 INFO L231 Difference]: Finished difference. Result has 181 places, 238 transitions, 2668 flow [2024-06-28 04:04:20,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2538, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2668, PETRI_PLACES=181, PETRI_TRANSITIONS=238} [2024-06-28 04:04:20,460 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 138 predicate places. [2024-06-28 04:04:20,460 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 238 transitions, 2668 flow [2024-06-28 04:04:20,461 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 04:04:20,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:04:20,461 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 04:04:20,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-28 04:04:20,461 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 04:04:20,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:04:20,461 INFO L85 PathProgramCache]: Analyzing trace with hash -274555231, now seen corresponding path program 1 times [2024-06-28 04:04:20,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:04:20,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136160598] [2024-06-28 04:04:20,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:04:20,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:04:20,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:04:22,969 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 04:04:22,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:04:22,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136160598] [2024-06-28 04:04:22,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136160598] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:04:22,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:04:22,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:04:22,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684931907] [2024-06-28 04:04:22,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:04:22,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:04:22,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:04:22,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:04:22,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:04:23,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:04:23,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 238 transitions, 2668 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:04:23,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:04:23,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:04:23,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:04:24,039 INFO L124 PetriNetUnfolderBase]: 2457/4001 cut-off events. [2024-06-28 04:04:24,039 INFO L125 PetriNetUnfolderBase]: For 118475/118492 co-relation queries the response was YES. [2024-06-28 04:04:24,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24423 conditions, 4001 events. 2457/4001 cut-off events. For 118475/118492 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 22990 event pairs, 678 based on Foata normal form. 16/4009 useless extension candidates. Maximal degree in co-relation 24338. Up to 3711 conditions per place. [2024-06-28 04:04:24,072 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 216 selfloop transitions, 40 changer transitions 0/266 dead transitions. [2024-06-28 04:04:24,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 266 transitions, 3412 flow [2024-06-28 04:04:24,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:04:24,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:04:24,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-28 04:04:24,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-28 04:04:24,074 INFO L175 Difference]: Start difference. First operand has 181 places, 238 transitions, 2668 flow. Second operand 7 states and 119 transitions. [2024-06-28 04:04:24,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 266 transitions, 3412 flow [2024-06-28 04:04:24,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 266 transitions, 3304 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-28 04:04:24,256 INFO L231 Difference]: Finished difference. Result has 183 places, 244 transitions, 2725 flow [2024-06-28 04:04:24,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2560, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2725, PETRI_PLACES=183, PETRI_TRANSITIONS=244} [2024-06-28 04:04:24,257 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 140 predicate places. [2024-06-28 04:04:24,257 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 244 transitions, 2725 flow [2024-06-28 04:04:24,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:04:24,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:04:24,257 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 04:04:24,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-28 04:04:24,258 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 04:04:24,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:04:24,258 INFO L85 PathProgramCache]: Analyzing trace with hash -1541064237, now seen corresponding path program 2 times [2024-06-28 04:04:24,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:04:24,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099586233] [2024-06-28 04:04:24,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:04:24,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:04:24,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:04:26,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:04:26,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:04:26,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099586233] [2024-06-28 04:04:26,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099586233] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:04:26,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:04:26,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:04:26,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045211996] [2024-06-28 04:04:26,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:04:26,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:04:26,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:04:26,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:04:26,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:04:26,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:04:26,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 244 transitions, 2725 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 04:04:26,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:04:26,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:04:26,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:04:27,575 INFO L124 PetriNetUnfolderBase]: 2465/4013 cut-off events. [2024-06-28 04:04:27,575 INFO L125 PetriNetUnfolderBase]: For 124386/124403 co-relation queries the response was YES. [2024-06-28 04:04:27,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24861 conditions, 4013 events. 2465/4013 cut-off events. For 124386/124403 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 23093 event pairs, 678 based on Foata normal form. 16/4021 useless extension candidates. Maximal degree in co-relation 24775. Up to 3784 conditions per place. [2024-06-28 04:04:27,609 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 217 selfloop transitions, 37 changer transitions 0/264 dead transitions. [2024-06-28 04:04:27,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 264 transitions, 3343 flow [2024-06-28 04:04:27,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:04:27,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:04:27,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-28 04:04:27,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3843537414965986 [2024-06-28 04:04:27,611 INFO L175 Difference]: Start difference. First operand has 183 places, 244 transitions, 2725 flow. Second operand 7 states and 113 transitions. [2024-06-28 04:04:27,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 264 transitions, 3343 flow [2024-06-28 04:04:27,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 264 transitions, 3270 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-28 04:04:27,796 INFO L231 Difference]: Finished difference. Result has 187 places, 247 transitions, 2780 flow [2024-06-28 04:04:27,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2656, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2780, PETRI_PLACES=187, PETRI_TRANSITIONS=247} [2024-06-28 04:04:27,796 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 144 predicate places. [2024-06-28 04:04:27,796 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 247 transitions, 2780 flow [2024-06-28 04:04:27,796 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 04:04:27,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:04:27,797 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 04:04:27,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-28 04:04:27,797 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 04:04:27,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:04:27,797 INFO L85 PathProgramCache]: Analyzing trace with hash -274435075, now seen corresponding path program 1 times [2024-06-28 04:04:27,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:04:27,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956853188] [2024-06-28 04:04:27,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:04:27,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:04:27,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:04:29,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:04:29,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:04:29,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956853188] [2024-06-28 04:04:29,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956853188] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:04:29,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:04:29,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:04:29,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252807015] [2024-06-28 04:04:29,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:04:29,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:04:29,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:04:29,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:04:29,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:04:29,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:04:29,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 247 transitions, 2780 flow. Second operand has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:04:29,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:04:29,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:04:29,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:04:31,368 INFO L124 PetriNetUnfolderBase]: 2589/4154 cut-off events. [2024-06-28 04:04:31,368 INFO L125 PetriNetUnfolderBase]: For 131322/131322 co-relation queries the response was YES. [2024-06-28 04:04:31,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25675 conditions, 4154 events. 2589/4154 cut-off events. For 131322/131322 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 23899 event pairs, 1277 based on Foata normal form. 2/4156 useless extension candidates. Maximal degree in co-relation 25587. Up to 3992 conditions per place. [2024-06-28 04:04:31,400 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 250 selfloop transitions, 23 changer transitions 0/277 dead transitions. [2024-06-28 04:04:31,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 277 transitions, 3549 flow [2024-06-28 04:04:31,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:04:31,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:04:31,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-28 04:04:31,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3843537414965986 [2024-06-28 04:04:31,402 INFO L175 Difference]: Start difference. First operand has 187 places, 247 transitions, 2780 flow. Second operand 7 states and 113 transitions. [2024-06-28 04:04:31,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 277 transitions, 3549 flow [2024-06-28 04:04:31,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 277 transitions, 3446 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-28 04:04:31,567 INFO L231 Difference]: Finished difference. Result has 191 places, 257 transitions, 2838 flow [2024-06-28 04:04:31,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2684, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2838, PETRI_PLACES=191, PETRI_TRANSITIONS=257} [2024-06-28 04:04:31,567 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 148 predicate places. [2024-06-28 04:04:31,567 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 257 transitions, 2838 flow [2024-06-28 04:04:31,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:04:31,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:04:31,568 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 04:04:31,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-28 04:04:31,568 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 04:04:31,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:04:31,568 INFO L85 PathProgramCache]: Analyzing trace with hash 9593593, now seen corresponding path program 2 times [2024-06-28 04:04:31,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:04:31,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216087214] [2024-06-28 04:04:31,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:04:31,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:04:31,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:04:33,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:04:33,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:04:33,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216087214] [2024-06-28 04:04:33,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216087214] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:04:33,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:04:33,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:04:33,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222528097] [2024-06-28 04:04:33,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:04:33,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:04:33,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:04:33,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:04:33,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:04:33,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:04:33,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 257 transitions, 2838 flow. Second operand has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:04:33,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:04:33,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:04:33,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:04:35,183 INFO L124 PetriNetUnfolderBase]: 2599/4169 cut-off events. [2024-06-28 04:04:35,183 INFO L125 PetriNetUnfolderBase]: For 137216/137220 co-relation queries the response was YES. [2024-06-28 04:04:35,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26077 conditions, 4169 events. 2599/4169 cut-off events. For 137216/137220 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 23960 event pairs, 1280 based on Foata normal form. 6/4175 useless extension candidates. Maximal degree in co-relation 25986. Up to 4002 conditions per place. [2024-06-28 04:04:35,218 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 244 selfloop transitions, 28 changer transitions 0/276 dead transitions. [2024-06-28 04:04:35,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 276 transitions, 3548 flow [2024-06-28 04:04:35,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:04:35,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:04:35,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 107 transitions. [2024-06-28 04:04:35,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36394557823129253 [2024-06-28 04:04:35,219 INFO L175 Difference]: Start difference. First operand has 191 places, 257 transitions, 2838 flow. Second operand 7 states and 107 transitions. [2024-06-28 04:04:35,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 276 transitions, 3548 flow [2024-06-28 04:04:35,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 276 transitions, 3496 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-28 04:04:35,400 INFO L231 Difference]: Finished difference. Result has 196 places, 262 transitions, 2908 flow [2024-06-28 04:04:35,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2790, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2908, PETRI_PLACES=196, PETRI_TRANSITIONS=262} [2024-06-28 04:04:35,400 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 153 predicate places. [2024-06-28 04:04:35,400 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 262 transitions, 2908 flow [2024-06-28 04:04:35,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:04:35,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:04:35,401 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 04:04:35,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-28 04:04:35,401 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 04:04:35,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:04:35,401 INFO L85 PathProgramCache]: Analyzing trace with hash -97303555, now seen corresponding path program 3 times [2024-06-28 04:04:35,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:04:35,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971404705] [2024-06-28 04:04:35,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:04:35,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:04:35,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:04:37,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:04:37,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:04:37,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971404705] [2024-06-28 04:04:37,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971404705] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:04:37,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:04:37,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:04:37,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523330901] [2024-06-28 04:04:37,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:04:37,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:04:37,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:04:37,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:04:37,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:04:38,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:04:38,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 262 transitions, 2908 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:04:38,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:04:38,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:04:38,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:04:39,536 INFO L124 PetriNetUnfolderBase]: 2593/4161 cut-off events. [2024-06-28 04:04:39,537 INFO L125 PetriNetUnfolderBase]: For 140873/140877 co-relation queries the response was YES. [2024-06-28 04:04:39,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25928 conditions, 4161 events. 2593/4161 cut-off events. For 140873/140877 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 23894 event pairs, 1279 based on Foata normal form. 6/4167 useless extension candidates. Maximal degree in co-relation 25835. Up to 3997 conditions per place. [2024-06-28 04:04:39,574 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 245 selfloop transitions, 27 changer transitions 0/276 dead transitions. [2024-06-28 04:04:39,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 276 transitions, 3490 flow [2024-06-28 04:04:39,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:04:39,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:04:39,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 108 transitions. [2024-06-28 04:04:39,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3673469387755102 [2024-06-28 04:04:39,575 INFO L175 Difference]: Start difference. First operand has 196 places, 262 transitions, 2908 flow. Second operand 7 states and 108 transitions. [2024-06-28 04:04:39,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 276 transitions, 3490 flow [2024-06-28 04:04:39,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 276 transitions, 3419 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-28 04:04:39,738 INFO L231 Difference]: Finished difference. Result has 199 places, 262 transitions, 2897 flow [2024-06-28 04:04:39,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2837, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2897, PETRI_PLACES=199, PETRI_TRANSITIONS=262} [2024-06-28 04:04:39,738 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 156 predicate places. [2024-06-28 04:04:39,738 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 262 transitions, 2897 flow [2024-06-28 04:04:39,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:04:39,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:04:39,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:04:39,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-28 04:04:39,739 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 04:04:39,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:04:39,739 INFO L85 PathProgramCache]: Analyzing trace with hash -269793631, now seen corresponding path program 3 times [2024-06-28 04:04:39,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:04:39,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413145974] [2024-06-28 04:04:39,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:04:39,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:04:39,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:04:41,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:04:41,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:04:41,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413145974] [2024-06-28 04:04:41,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413145974] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:04:41,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:04:41,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:04:41,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108485900] [2024-06-28 04:04:41,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:04:41,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:04:41,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:04:41,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:04:41,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:04:41,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:04:41,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 262 transitions, 2897 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 04:04:41,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:04:41,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:04:41,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:04:43,138 INFO L124 PetriNetUnfolderBase]: 2493/4044 cut-off events. [2024-06-28 04:04:43,138 INFO L125 PetriNetUnfolderBase]: For 143606/143660 co-relation queries the response was YES. [2024-06-28 04:04:43,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25436 conditions, 4044 events. 2493/4044 cut-off events. For 143606/143660 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 23287 event pairs, 690 based on Foata normal form. 42/4074 useless extension candidates. Maximal degree in co-relation 25343. Up to 3791 conditions per place. [2024-06-28 04:04:43,174 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 218 selfloop transitions, 41 changer transitions 0/274 dead transitions. [2024-06-28 04:04:43,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 274 transitions, 3457 flow [2024-06-28 04:04:43,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:04:43,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:04:43,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 109 transitions. [2024-06-28 04:04:43,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3707482993197279 [2024-06-28 04:04:43,175 INFO L175 Difference]: Start difference. First operand has 199 places, 262 transitions, 2897 flow. Second operand 7 states and 109 transitions. [2024-06-28 04:04:43,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 274 transitions, 3457 flow [2024-06-28 04:04:43,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 274 transitions, 3385 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-28 04:04:43,367 INFO L231 Difference]: Finished difference. Result has 201 places, 262 transitions, 2914 flow [2024-06-28 04:04:43,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2825, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2914, PETRI_PLACES=201, PETRI_TRANSITIONS=262} [2024-06-28 04:04:43,368 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 158 predicate places. [2024-06-28 04:04:43,368 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 262 transitions, 2914 flow [2024-06-28 04:04:43,368 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 04:04:43,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:04:43,368 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 04:04:43,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-28 04:04:43,369 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 04:04:43,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:04:43,369 INFO L85 PathProgramCache]: Analyzing trace with hash -97057477, now seen corresponding path program 1 times [2024-06-28 04:04:43,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:04:43,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050127611] [2024-06-28 04:04:43,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:04:43,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:04:43,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:04:46,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:04:46,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:04:46,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050127611] [2024-06-28 04:04:46,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050127611] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:04:46,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:04:46,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:04:46,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988248868] [2024-06-28 04:04:46,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:04:46,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:04:46,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:04:46,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:04:46,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:04:46,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:04:46,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 262 transitions, 2914 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 04:04:46,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:04:46,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:04:46,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:04:47,545 INFO L124 PetriNetUnfolderBase]: 2451/3963 cut-off events. [2024-06-28 04:04:47,546 INFO L125 PetriNetUnfolderBase]: For 152271/152330 co-relation queries the response was YES. [2024-06-28 04:04:47,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24960 conditions, 3963 events. 2451/3963 cut-off events. For 152271/152330 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 23070 event pairs, 1225 based on Foata normal form. 53/4002 useless extension candidates. Maximal degree in co-relation 24866. Up to 3762 conditions per place. [2024-06-28 04:04:47,584 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 243 selfloop transitions, 14 changer transitions 0/277 dead transitions. [2024-06-28 04:04:47,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 277 transitions, 3480 flow [2024-06-28 04:04:47,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:04:47,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:04:47,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 108 transitions. [2024-06-28 04:04:47,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3673469387755102 [2024-06-28 04:04:47,585 INFO L175 Difference]: Start difference. First operand has 201 places, 262 transitions, 2914 flow. Second operand 7 states and 108 transitions. [2024-06-28 04:04:47,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 277 transitions, 3480 flow [2024-06-28 04:04:47,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 277 transitions, 3367 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-28 04:04:47,792 INFO L231 Difference]: Finished difference. Result has 202 places, 264 transitions, 2854 flow [2024-06-28 04:04:47,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2801, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2854, PETRI_PLACES=202, PETRI_TRANSITIONS=264} [2024-06-28 04:04:47,793 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 159 predicate places. [2024-06-28 04:04:47,793 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 264 transitions, 2854 flow [2024-06-28 04:04:47,793 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 04:04:47,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:04:47,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:04:47,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-28 04:04:47,794 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 04:04:47,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:04:47,794 INFO L85 PathProgramCache]: Analyzing trace with hash -532159027, now seen corresponding path program 1 times [2024-06-28 04:04:47,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:04:47,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830970242] [2024-06-28 04:04:47,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:04:47,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:04:47,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:04:50,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:04:50,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:04:50,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830970242] [2024-06-28 04:04:50,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830970242] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:04:50,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:04:50,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:04:50,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142377317] [2024-06-28 04:04:50,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:04:50,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:04:50,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:04:50,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:04:50,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:04:50,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:04:50,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 264 transitions, 2854 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 04:04:50,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:04:50,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:04:50,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:04:51,628 INFO L124 PetriNetUnfolderBase]: 2524/4084 cut-off events. [2024-06-28 04:04:51,629 INFO L125 PetriNetUnfolderBase]: For 154862/154879 co-relation queries the response was YES. [2024-06-28 04:04:51,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25851 conditions, 4084 events. 2524/4084 cut-off events. For 154862/154879 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 23469 event pairs, 675 based on Foata normal form. 16/4092 useless extension candidates. Maximal degree in co-relation 25756. Up to 3718 conditions per place. [2024-06-28 04:04:51,668 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 228 selfloop transitions, 53 changer transitions 0/297 dead transitions. [2024-06-28 04:04:51,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 297 transitions, 3664 flow [2024-06-28 04:04:51,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:04:51,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:04:51,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-28 04:04:51,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-28 04:04:51,670 INFO L175 Difference]: Start difference. First operand has 202 places, 264 transitions, 2854 flow. Second operand 8 states and 136 transitions. [2024-06-28 04:04:51,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 297 transitions, 3664 flow [2024-06-28 04:04:51,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 297 transitions, 3627 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-28 04:04:51,900 INFO L231 Difference]: Finished difference. Result has 205 places, 270 transitions, 2991 flow [2024-06-28 04:04:51,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2817, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2991, PETRI_PLACES=205, PETRI_TRANSITIONS=270} [2024-06-28 04:04:51,901 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 162 predicate places. [2024-06-28 04:04:51,901 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 270 transitions, 2991 flow [2024-06-28 04:04:51,901 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 04:04:51,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:04:51,901 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 04:04:51,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-28 04:04:51,902 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 04:04:51,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:04:51,902 INFO L85 PathProgramCache]: Analyzing trace with hash 78723775, now seen corresponding path program 2 times [2024-06-28 04:04:51,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:04:51,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616084700] [2024-06-28 04:04:51,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:04:51,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:04:51,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:04:55,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:04:55,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:04:55,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616084700] [2024-06-28 04:04:55,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616084700] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:04:55,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:04:55,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:04:55,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195013201] [2024-06-28 04:04:55,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:04:55,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:04:55,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:04:55,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:04:55,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:04:55,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:04:55,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 270 transitions, 2991 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 04:04:55,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:04:55,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:04:55,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:04:56,775 INFO L124 PetriNetUnfolderBase]: 2519/4077 cut-off events. [2024-06-28 04:04:56,776 INFO L125 PetriNetUnfolderBase]: For 160282/160299 co-relation queries the response was YES. [2024-06-28 04:04:56,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26404 conditions, 4077 events. 2519/4077 cut-off events. For 160282/160299 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 23420 event pairs, 673 based on Foata normal form. 16/4085 useless extension candidates. Maximal degree in co-relation 26308. Up to 3785 conditions per place. [2024-06-28 04:04:56,814 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 240 selfloop transitions, 39 changer transitions 0/295 dead transitions. [2024-06-28 04:04:56,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 295 transitions, 3669 flow [2024-06-28 04:04:56,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:04:56,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:04:56,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-28 04:04:56,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37797619047619047 [2024-06-28 04:04:56,816 INFO L175 Difference]: Start difference. First operand has 205 places, 270 transitions, 2991 flow. Second operand 8 states and 127 transitions. [2024-06-28 04:04:56,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 295 transitions, 3669 flow [2024-06-28 04:04:57,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 295 transitions, 3578 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-28 04:04:57,041 INFO L231 Difference]: Finished difference. Result has 209 places, 273 transitions, 3024 flow [2024-06-28 04:04:57,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2900, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3024, PETRI_PLACES=209, PETRI_TRANSITIONS=273} [2024-06-28 04:04:57,041 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 166 predicate places. [2024-06-28 04:04:57,041 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 273 transitions, 3024 flow [2024-06-28 04:04:57,042 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 04:04:57,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:04:57,042 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 04:04:57,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-28 04:04:57,042 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 04:04:57,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:04:57,043 INFO L85 PathProgramCache]: Analyzing trace with hash 78723930, now seen corresponding path program 1 times [2024-06-28 04:04:57,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:04:57,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535467118] [2024-06-28 04:04:57,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:04:57,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:04:57,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:04:59,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:04:59,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:04:59,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535467118] [2024-06-28 04:04:59,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535467118] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:04:59,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:04:59,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:04:59,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138764111] [2024-06-28 04:04:59,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:04:59,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:04:59,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:04:59,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:04:59,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:04:59,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:04:59,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 273 transitions, 3024 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:04:59,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:04:59,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:04:59,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:05:00,805 INFO L124 PetriNetUnfolderBase]: 2612/4187 cut-off events. [2024-06-28 04:05:00,805 INFO L125 PetriNetUnfolderBase]: For 168397/168397 co-relation queries the response was YES. [2024-06-28 04:05:00,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27459 conditions, 4187 events. 2612/4187 cut-off events. For 168397/168397 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 24097 event pairs, 1278 based on Foata normal form. 2/4189 useless extension candidates. Maximal degree in co-relation 27361. Up to 4039 conditions per place. [2024-06-28 04:05:00,853 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 281 selfloop transitions, 18 changer transitions 0/303 dead transitions. [2024-06-28 04:05:00,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 303 transitions, 3786 flow [2024-06-28 04:05:00,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:05:00,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:05:00,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-28 04:05:00,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3601190476190476 [2024-06-28 04:05:00,855 INFO L175 Difference]: Start difference. First operand has 209 places, 273 transitions, 3024 flow. Second operand 8 states and 121 transitions. [2024-06-28 04:05:00,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 303 transitions, 3786 flow [2024-06-28 04:05:01,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 303 transitions, 3677 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-28 04:05:01,085 INFO L231 Difference]: Finished difference. Result has 213 places, 282 transitions, 3075 flow [2024-06-28 04:05:01,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2922, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3075, PETRI_PLACES=213, PETRI_TRANSITIONS=282} [2024-06-28 04:05:01,086 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 170 predicate places. [2024-06-28 04:05:01,086 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 282 transitions, 3075 flow [2024-06-28 04:05:01,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:05:01,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:05:01,086 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 04:05:01,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-28 04:05:01,086 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 04:05:01,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:05:01,087 INFO L85 PathProgramCache]: Analyzing trace with hash 82443000, now seen corresponding path program 2 times [2024-06-28 04:05:01,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:05:01,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500726738] [2024-06-28 04:05:01,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:05:01,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:05:01,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:05:03,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:05:03,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:05:03,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500726738] [2024-06-28 04:05:03,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500726738] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:05:03,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:05:03,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:05:03,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424384491] [2024-06-28 04:05:03,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:05:03,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:05:03,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:05:03,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:05:03,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:05:03,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:05:03,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 282 transitions, 3075 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:05:03,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:05:03,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:05:03,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:05:04,653 INFO L124 PetriNetUnfolderBase]: 2638/4223 cut-off events. [2024-06-28 04:05:04,653 INFO L125 PetriNetUnfolderBase]: For 176671/176671 co-relation queries the response was YES. [2024-06-28 04:05:04,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28055 conditions, 4223 events. 2638/4223 cut-off events. For 176671/176671 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 24218 event pairs, 1274 based on Foata normal form. 2/4225 useless extension candidates. Maximal degree in co-relation 27954. Up to 4056 conditions per place. [2024-06-28 04:05:04,691 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 283 selfloop transitions, 33 changer transitions 0/320 dead transitions. [2024-06-28 04:05:04,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 320 transitions, 4019 flow [2024-06-28 04:05:04,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:05:04,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:05:04,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-28 04:05:04,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37202380952380953 [2024-06-28 04:05:04,693 INFO L175 Difference]: Start difference. First operand has 213 places, 282 transitions, 3075 flow. Second operand 8 states and 125 transitions. [2024-06-28 04:05:04,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 320 transitions, 4019 flow [2024-06-28 04:05:05,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 320 transitions, 3944 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-28 04:05:05,010 INFO L231 Difference]: Finished difference. Result has 221 places, 301 transitions, 3301 flow [2024-06-28 04:05:05,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3005, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3301, PETRI_PLACES=221, PETRI_TRANSITIONS=301} [2024-06-28 04:05:05,010 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 178 predicate places. [2024-06-28 04:05:05,010 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 301 transitions, 3301 flow [2024-06-28 04:05:05,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:05:05,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:05:05,011 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:05:05,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-28 04:05:05,011 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 04:05:05,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:05:05,011 INFO L85 PathProgramCache]: Analyzing trace with hash 82442845, now seen corresponding path program 3 times [2024-06-28 04:05:05,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:05:05,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52579128] [2024-06-28 04:05:05,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:05:05,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:05:05,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:05:07,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:05:07,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:05:07,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52579128] [2024-06-28 04:05:07,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52579128] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:05:07,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:05:07,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:05:07,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085061507] [2024-06-28 04:05:07,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:05:07,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:05:07,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:05:07,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:05:07,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:05:07,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:05:07,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 301 transitions, 3301 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 04:05:07,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:05:07,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:05:07,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:05:09,127 INFO L124 PetriNetUnfolderBase]: 2730/4377 cut-off events. [2024-06-28 04:05:09,128 INFO L125 PetriNetUnfolderBase]: For 211158/211173 co-relation queries the response was YES. [2024-06-28 04:05:09,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31178 conditions, 4377 events. 2730/4377 cut-off events. For 211158/211173 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 25051 event pairs, 623 based on Foata normal form. 16/4389 useless extension candidates. Maximal degree in co-relation 31072. Up to 3582 conditions per place. [2024-06-28 04:05:09,170 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 194 selfloop transitions, 119 changer transitions 0/338 dead transitions. [2024-06-28 04:05:09,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 338 transitions, 4293 flow [2024-06-28 04:05:09,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:05:09,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:05:09,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-28 04:05:09,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3915343915343915 [2024-06-28 04:05:09,176 INFO L175 Difference]: Start difference. First operand has 221 places, 301 transitions, 3301 flow. Second operand 9 states and 148 transitions. [2024-06-28 04:05:09,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 338 transitions, 4293 flow [2024-06-28 04:05:09,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 338 transitions, 4223 flow, removed 34 selfloop flow, removed 1 redundant places. [2024-06-28 04:05:09,474 INFO L231 Difference]: Finished difference. Result has 230 places, 312 transitions, 3758 flow [2024-06-28 04:05:09,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3255, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3758, PETRI_PLACES=230, PETRI_TRANSITIONS=312} [2024-06-28 04:05:09,475 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 187 predicate places. [2024-06-28 04:05:09,475 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 312 transitions, 3758 flow [2024-06-28 04:05:09,475 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 04:05:09,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:05:09,476 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 04:05:09,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-28 04:05:09,476 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 04:05:09,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:05:09,476 INFO L85 PathProgramCache]: Analyzing trace with hash -528344012, now seen corresponding path program 3 times [2024-06-28 04:05:09,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:05:09,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424608815] [2024-06-28 04:05:09,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:05:09,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:05:09,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:05:11,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:05:11,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:05:11,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424608815] [2024-06-28 04:05:11,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424608815] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:05:11,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:05:11,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:05:11,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630945959] [2024-06-28 04:05:11,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:05:11,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:05:11,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:05:11,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:05:11,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:05:11,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:05:11,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 312 transitions, 3758 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:05:11,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:05:11,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:05:11,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:05:13,141 INFO L124 PetriNetUnfolderBase]: 2796/4452 cut-off events. [2024-06-28 04:05:13,142 INFO L125 PetriNetUnfolderBase]: For 223204/223204 co-relation queries the response was YES. [2024-06-28 04:05:13,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33315 conditions, 4452 events. 2796/4452 cut-off events. For 223204/223204 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 25559 event pairs, 1347 based on Foata normal form. 2/4454 useless extension candidates. Maximal degree in co-relation 33205. Up to 4297 conditions per place. [2024-06-28 04:05:13,189 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 296 selfloop transitions, 30 changer transitions 0/330 dead transitions. [2024-06-28 04:05:13,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 330 transitions, 4478 flow [2024-06-28 04:05:13,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:05:13,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:05:13,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-28 04:05:13,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3601190476190476 [2024-06-28 04:05:13,191 INFO L175 Difference]: Start difference. First operand has 230 places, 312 transitions, 3758 flow. Second operand 8 states and 121 transitions. [2024-06-28 04:05:13,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 330 transitions, 4478 flow [2024-06-28 04:05:13,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 330 transitions, 4344 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-28 04:05:13,559 INFO L231 Difference]: Finished difference. Result has 233 places, 313 transitions, 3706 flow [2024-06-28 04:05:13,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3632, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3706, PETRI_PLACES=233, PETRI_TRANSITIONS=313} [2024-06-28 04:05:13,560 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 190 predicate places. [2024-06-28 04:05:13,560 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 313 transitions, 3706 flow [2024-06-28 04:05:13,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:05:13,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:05:13,560 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 04:05:13,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-28 04:05:13,564 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 04:05:13,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:05:13,565 INFO L85 PathProgramCache]: Analyzing trace with hash 290045311, now seen corresponding path program 4 times [2024-06-28 04:05:13,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:05:13,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480359450] [2024-06-28 04:05:13,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:05:13,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:05:13,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:05:15,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:05:15,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:05:15,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480359450] [2024-06-28 04:05:15,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480359450] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:05:15,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:05:15,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:05:15,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996091594] [2024-06-28 04:05:15,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:05:15,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:05:15,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:05:15,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:05:15,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:05:16,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:05:16,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 313 transitions, 3706 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 04:05:16,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:05:16,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:05:16,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:05:17,440 INFO L124 PetriNetUnfolderBase]: 2720/4364 cut-off events. [2024-06-28 04:05:17,440 INFO L125 PetriNetUnfolderBase]: For 226131/226185 co-relation queries the response was YES. [2024-06-28 04:05:17,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32661 conditions, 4364 events. 2720/4364 cut-off events. For 226131/226185 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 25046 event pairs, 743 based on Foata normal form. 44/4400 useless extension candidates. Maximal degree in co-relation 32549. Up to 4052 conditions per place. [2024-06-28 04:05:17,488 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 256 selfloop transitions, 44 changer transitions 0/326 dead transitions. [2024-06-28 04:05:17,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 326 transitions, 4350 flow [2024-06-28 04:05:17,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:05:17,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:05:17,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-28 04:05:17,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3601190476190476 [2024-06-28 04:05:17,489 INFO L175 Difference]: Start difference. First operand has 233 places, 313 transitions, 3706 flow. Second operand 8 states and 121 transitions. [2024-06-28 04:05:17,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 326 transitions, 4350 flow [2024-06-28 04:05:17,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 326 transitions, 4283 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-28 04:05:17,888 INFO L231 Difference]: Finished difference. Result has 235 places, 313 transitions, 3733 flow [2024-06-28 04:05:17,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3639, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3733, PETRI_PLACES=235, PETRI_TRANSITIONS=313} [2024-06-28 04:05:17,888 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 192 predicate places. [2024-06-28 04:05:17,889 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 313 transitions, 3733 flow [2024-06-28 04:05:17,889 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 04:05:17,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:05:17,889 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:05:17,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-28 04:05:17,889 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 04:05:17,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:05:17,890 INFO L85 PathProgramCache]: Analyzing trace with hash 301565218, now seen corresponding path program 4 times [2024-06-28 04:05:17,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:05:17,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830560571] [2024-06-28 04:05:17,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:05:17,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:05:17,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:05:20,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:05:20,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:05:20,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830560571] [2024-06-28 04:05:20,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830560571] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:05:20,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:05:20,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:05:20,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506259835] [2024-06-28 04:05:20,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:05:20,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:05:20,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:05:20,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:05:20,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:05:20,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:05:20,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 313 transitions, 3733 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:05:20,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:05:20,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:05:20,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:05:21,656 INFO L124 PetriNetUnfolderBase]: 2800/4459 cut-off events. [2024-06-28 04:05:21,656 INFO L125 PetriNetUnfolderBase]: For 236200/236206 co-relation queries the response was YES. [2024-06-28 04:05:21,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33574 conditions, 4459 events. 2800/4459 cut-off events. For 236200/236206 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 25604 event pairs, 1350 based on Foata normal form. 8/4467 useless extension candidates. Maximal degree in co-relation 33461. Up to 4303 conditions per place. [2024-06-28 04:05:21,705 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 295 selfloop transitions, 32 changer transitions 0/331 dead transitions. [2024-06-28 04:05:21,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 331 transitions, 4512 flow [2024-06-28 04:05:21,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:05:21,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:05:21,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 116 transitions. [2024-06-28 04:05:21,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34523809523809523 [2024-06-28 04:05:21,713 INFO L175 Difference]: Start difference. First operand has 235 places, 313 transitions, 3733 flow. Second operand 8 states and 116 transitions. [2024-06-28 04:05:21,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 331 transitions, 4512 flow [2024-06-28 04:05:22,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 331 transitions, 4399 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-28 04:05:22,157 INFO L231 Difference]: Finished difference. Result has 236 places, 318 transitions, 3785 flow [2024-06-28 04:05:22,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3620, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3785, PETRI_PLACES=236, PETRI_TRANSITIONS=318} [2024-06-28 04:05:22,158 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 193 predicate places. [2024-06-28 04:05:22,158 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 318 transitions, 3785 flow [2024-06-28 04:05:22,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:05:22,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:05:22,158 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 04:05:22,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-28 04:05:22,159 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 04:05:22,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:05:22,161 INFO L85 PathProgramCache]: Analyzing trace with hash 294213568, now seen corresponding path program 5 times [2024-06-28 04:05:22,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:05:22,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099646762] [2024-06-28 04:05:22,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:05:22,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:05:22,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:05:24,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:05:24,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:05:24,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099646762] [2024-06-28 04:05:24,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099646762] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:05:24,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:05:24,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:05:24,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743805205] [2024-06-28 04:05:24,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:05:24,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:05:24,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:05:24,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:05:24,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:05:24,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:05:24,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 318 transitions, 3785 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:05:24,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:05:24,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:05:24,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:05:25,737 INFO L124 PetriNetUnfolderBase]: 2807/4469 cut-off events. [2024-06-28 04:05:25,737 INFO L125 PetriNetUnfolderBase]: For 244888/244894 co-relation queries the response was YES. [2024-06-28 04:05:25,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33999 conditions, 4469 events. 2807/4469 cut-off events. For 244888/244894 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 25650 event pairs, 1348 based on Foata normal form. 9/4478 useless extension candidates. Maximal degree in co-relation 33885. Up to 4296 conditions per place. [2024-06-28 04:05:25,785 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 292 selfloop transitions, 40 changer transitions 0/336 dead transitions. [2024-06-28 04:05:25,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 336 transitions, 4592 flow [2024-06-28 04:05:25,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:05:25,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:05:25,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 120 transitions. [2024-06-28 04:05:25,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35714285714285715 [2024-06-28 04:05:25,808 INFO L175 Difference]: Start difference. First operand has 236 places, 318 transitions, 3785 flow. Second operand 8 states and 120 transitions. [2024-06-28 04:05:25,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 336 transitions, 4592 flow [2024-06-28 04:05:26,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 336 transitions, 4483 flow, removed 33 selfloop flow, removed 4 redundant places. [2024-06-28 04:05:26,377 INFO L231 Difference]: Finished difference. Result has 240 places, 323 transitions, 3879 flow [2024-06-28 04:05:26,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3676, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3879, PETRI_PLACES=240, PETRI_TRANSITIONS=323} [2024-06-28 04:05:26,378 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 197 predicate places. [2024-06-28 04:05:26,378 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 323 transitions, 3879 flow [2024-06-28 04:05:26,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:05:26,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:05:26,382 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:05:26,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-28 04:05:26,382 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 04:05:26,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:05:26,382 INFO L85 PathProgramCache]: Analyzing trace with hash 1278552824, now seen corresponding path program 6 times [2024-06-28 04:05:26,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:05:26,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893218079] [2024-06-28 04:05:26,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:05:26,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:05:26,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:05:28,534 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 04:05:28,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:05:28,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893218079] [2024-06-28 04:05:28,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893218079] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:05:28,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:05:28,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:05:28,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908327214] [2024-06-28 04:05:28,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:05:28,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:05:28,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:05:28,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:05:28,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:05:28,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:05:28,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 323 transitions, 3879 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:05:28,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:05:28,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:05:28,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:05:29,921 INFO L124 PetriNetUnfolderBase]: 2801/4461 cut-off events. [2024-06-28 04:05:29,921 INFO L125 PetriNetUnfolderBase]: For 249407/249413 co-relation queries the response was YES. [2024-06-28 04:05:29,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34286 conditions, 4461 events. 2801/4461 cut-off events. For 249407/249413 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 25600 event pairs, 1347 based on Foata normal form. 8/4469 useless extension candidates. Maximal degree in co-relation 34171. Up to 4290 conditions per place. [2024-06-28 04:05:29,971 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 301 selfloop transitions, 40 changer transitions 0/345 dead transitions. [2024-06-28 04:05:29,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 345 transitions, 4756 flow [2024-06-28 04:05:29,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:05:29,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:05:29,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 119 transitions. [2024-06-28 04:05:29,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3541666666666667 [2024-06-28 04:05:29,972 INFO L175 Difference]: Start difference. First operand has 240 places, 323 transitions, 3879 flow. Second operand 8 states and 119 transitions. [2024-06-28 04:05:29,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 345 transitions, 4756 flow [2024-06-28 04:05:30,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 345 transitions, 4561 flow, removed 60 selfloop flow, removed 6 redundant places. [2024-06-28 04:05:30,491 INFO L231 Difference]: Finished difference. Result has 243 places, 331 transitions, 3944 flow [2024-06-28 04:05:30,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3722, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3944, PETRI_PLACES=243, PETRI_TRANSITIONS=331} [2024-06-28 04:05:30,493 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 200 predicate places. [2024-06-28 04:05:30,493 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 331 transitions, 3944 flow [2024-06-28 04:05:30,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:05:30,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:05:30,493 INFO 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 04:05:30,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-28 04:05:30,494 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 04:05:30,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:05:30,494 INFO L85 PathProgramCache]: Analyzing trace with hash -1624870608, now seen corresponding path program 1 times [2024-06-28 04:05:30,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:05:30,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471468031] [2024-06-28 04:05:30,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:05:30,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:05:30,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:05:32,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:05:32,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:05:32,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471468031] [2024-06-28 04:05:32,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471468031] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:05:32,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:05:32,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:05:32,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878134252] [2024-06-28 04:05:32,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:05:32,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:05:32,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:05:32,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:05:32,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:05:32,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:05:32,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 331 transitions, 3944 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:05:32,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:05:32,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:05:32,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:05:33,995 INFO L124 PetriNetUnfolderBase]: 2809/4447 cut-off events. [2024-06-28 04:05:33,995 INFO L125 PetriNetUnfolderBase]: For 255324/255326 co-relation queries the response was YES. [2024-06-28 04:05:34,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34644 conditions, 4447 events. 2809/4447 cut-off events. For 255324/255326 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 24943 event pairs, 442 based on Foata normal form. 2/4448 useless extension candidates. Maximal degree in co-relation 34527. Up to 4105 conditions per place. [2024-06-28 04:05:34,043 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 313 selfloop transitions, 36 changer transitions 0/353 dead transitions. [2024-06-28 04:05:34,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 353 transitions, 4868 flow [2024-06-28 04:05:34,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:05:34,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:05:34,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 99 transitions. [2024-06-28 04:05:34,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-28 04:05:34,053 INFO L175 Difference]: Start difference. First operand has 243 places, 331 transitions, 3944 flow. Second operand 6 states and 99 transitions. [2024-06-28 04:05:34,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 353 transitions, 4868 flow [2024-06-28 04:05:34,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 353 transitions, 4783 flow, removed 31 selfloop flow, removed 3 redundant places. [2024-06-28 04:05:34,542 INFO L231 Difference]: Finished difference. Result has 246 places, 335 transitions, 3999 flow [2024-06-28 04:05:34,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3859, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3999, PETRI_PLACES=246, PETRI_TRANSITIONS=335} [2024-06-28 04:05:34,543 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 203 predicate places. [2024-06-28 04:05:34,543 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 335 transitions, 3999 flow [2024-06-28 04:05:34,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:05:34,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:05:34,544 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:05:34,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-28 04:05:34,544 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 04:05:34,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:05:34,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1933159512, now seen corresponding path program 2 times [2024-06-28 04:05:34,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:05:34,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271724459] [2024-06-28 04:05:34,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:05:34,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:05:34,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:05:36,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:05:36,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:05:36,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271724459] [2024-06-28 04:05:36,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271724459] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:05:36,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:05:36,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:05:36,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208719316] [2024-06-28 04:05:36,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:05:36,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:05:36,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:05:36,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:05:36,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:05:36,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:05:36,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 335 transitions, 3999 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:05:36,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:05:36,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:05:36,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:05:38,271 INFO L124 PetriNetUnfolderBase]: 2804/4440 cut-off events. [2024-06-28 04:05:38,271 INFO L125 PetriNetUnfolderBase]: For 260794/260796 co-relation queries the response was YES. [2024-06-28 04:05:38,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34810 conditions, 4440 events. 2804/4440 cut-off events. For 260794/260796 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 24974 event pairs, 604 based on Foata normal form. 2/4441 useless extension candidates. Maximal degree in co-relation 34691. Up to 4237 conditions per place. [2024-06-28 04:05:38,337 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 308 selfloop transitions, 35 changer transitions 0/347 dead transitions. [2024-06-28 04:05:38,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 347 transitions, 4727 flow [2024-06-28 04:05:38,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:05:38,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:05:38,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 94 transitions. [2024-06-28 04:05:38,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.373015873015873 [2024-06-28 04:05:38,338 INFO L175 Difference]: Start difference. First operand has 246 places, 335 transitions, 3999 flow. Second operand 6 states and 94 transitions. [2024-06-28 04:05:38,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 347 transitions, 4727 flow [2024-06-28 04:05:38,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 347 transitions, 4656 flow, removed 23 selfloop flow, removed 2 redundant places. [2024-06-28 04:05:38,908 INFO L231 Difference]: Finished difference. Result has 250 places, 335 transitions, 4003 flow [2024-06-28 04:05:38,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3928, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4003, PETRI_PLACES=250, PETRI_TRANSITIONS=335} [2024-06-28 04:05:38,908 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 207 predicate places. [2024-06-28 04:05:38,908 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 335 transitions, 4003 flow [2024-06-28 04:05:38,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:05:38,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:05:38,909 INFO 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 04:05:38,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-28 04:05:38,909 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 04:05:38,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:05:38,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1489145734, now seen corresponding path program 1 times [2024-06-28 04:05:38,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:05:38,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80072215] [2024-06-28 04:05:38,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:05:38,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:05:38,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:05:41,115 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 04:05:41,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:05:41,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80072215] [2024-06-28 04:05:41,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80072215] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:05:41,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:05:41,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:05:41,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592878351] [2024-06-28 04:05:41,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:05:41,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:05:41,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:05:41,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:05:41,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:05:41,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:05:41,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 335 transitions, 4003 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:05:41,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:05:41,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:05:41,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:05:42,659 INFO L124 PetriNetUnfolderBase]: 2817/4464 cut-off events. [2024-06-28 04:05:42,659 INFO L125 PetriNetUnfolderBase]: For 269345/269351 co-relation queries the response was YES. [2024-06-28 04:05:42,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35222 conditions, 4464 events. 2817/4464 cut-off events. For 269345/269351 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 25158 event pairs, 597 based on Foata normal form. 5/4468 useless extension candidates. Maximal degree in co-relation 35101. Up to 4116 conditions per place. [2024-06-28 04:05:42,704 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 281 selfloop transitions, 73 changer transitions 0/358 dead transitions. [2024-06-28 04:05:42,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 358 transitions, 5005 flow [2024-06-28 04:05:42,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:05:42,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:05:42,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 103 transitions. [2024-06-28 04:05:42,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4087301587301587 [2024-06-28 04:05:42,705 INFO L175 Difference]: Start difference. First operand has 250 places, 335 transitions, 4003 flow. Second operand 6 states and 103 transitions. [2024-06-28 04:05:42,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 358 transitions, 5005 flow [2024-06-28 04:05:43,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 358 transitions, 4919 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-28 04:05:43,207 INFO L231 Difference]: Finished difference. Result has 251 places, 341 transitions, 4205 flow [2024-06-28 04:05:43,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3917, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4205, PETRI_PLACES=251, PETRI_TRANSITIONS=341} [2024-06-28 04:05:43,208 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 208 predicate places. [2024-06-28 04:05:43,208 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 341 transitions, 4205 flow [2024-06-28 04:05:43,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:05:43,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:05:43,209 INFO 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 04:05:43,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-28 04:05:43,209 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 04:05:43,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:05:43,209 INFO L85 PathProgramCache]: Analyzing trace with hash -1457600134, now seen corresponding path program 2 times [2024-06-28 04:05:43,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:05:43,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031755422] [2024-06-28 04:05:43,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:05:43,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:05:43,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:05:45,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:05:45,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:05:45,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031755422] [2024-06-28 04:05:45,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031755422] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:05:45,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:05:45,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:05:45,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605957515] [2024-06-28 04:05:45,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:05:45,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:05:45,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:05:45,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:05:45,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:05:45,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:05:45,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 341 transitions, 4205 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:05:45,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:05:45,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:05:45,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:05:47,181 INFO L124 PetriNetUnfolderBase]: 2814/4460 cut-off events. [2024-06-28 04:05:47,181 INFO L125 PetriNetUnfolderBase]: For 277969/277975 co-relation queries the response was YES. [2024-06-28 04:05:47,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35670 conditions, 4460 events. 2814/4460 cut-off events. For 277969/277975 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 25158 event pairs, 593 based on Foata normal form. 5/4464 useless extension candidates. Maximal degree in co-relation 35548. Up to 4113 conditions per place. [2024-06-28 04:05:47,229 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 273 selfloop transitions, 82 changer transitions 0/359 dead transitions. [2024-06-28 04:05:47,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 359 transitions, 4985 flow [2024-06-28 04:05:47,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:05:47,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:05:47,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-28 04:05:47,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-28 04:05:47,231 INFO L175 Difference]: Start difference. First operand has 251 places, 341 transitions, 4205 flow. Second operand 8 states and 126 transitions. [2024-06-28 04:05:47,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 359 transitions, 4985 flow [2024-06-28 04:05:47,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 359 transitions, 4881 flow, removed 34 selfloop flow, removed 3 redundant places. [2024-06-28 04:05:47,810 INFO L231 Difference]: Finished difference. Result has 256 places, 341 transitions, 4278 flow [2024-06-28 04:05:47,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4101, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4278, PETRI_PLACES=256, PETRI_TRANSITIONS=341} [2024-06-28 04:05:47,811 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 213 predicate places. [2024-06-28 04:05:47,811 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 341 transitions, 4278 flow [2024-06-28 04:05:47,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:05:47,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:05:47,811 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:05:47,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-28 04:05:47,812 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 04:05:47,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:05:47,812 INFO L85 PathProgramCache]: Analyzing trace with hash -833627610, now seen corresponding path program 3 times [2024-06-28 04:05:47,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:05:47,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645855532] [2024-06-28 04:05:47,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:05:47,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:05:47,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:05:50,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:05:50,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:05:50,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645855532] [2024-06-28 04:05:50,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645855532] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:05:50,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:05:50,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:05:50,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833111842] [2024-06-28 04:05:50,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:05:50,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:05:50,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:05:50,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:05:50,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:05:50,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:05:50,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 341 transitions, 4278 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:05:50,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:05:50,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:05:50,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:05:51,814 INFO L124 PetriNetUnfolderBase]: 2819/4469 cut-off events. [2024-06-28 04:05:51,814 INFO L125 PetriNetUnfolderBase]: For 278808/278814 co-relation queries the response was YES. [2024-06-28 04:05:51,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35971 conditions, 4469 events. 2819/4469 cut-off events. For 278808/278814 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 25281 event pairs, 596 based on Foata normal form. 5/4473 useless extension candidates. Maximal degree in co-relation 35848. Up to 4056 conditions per place. [2024-06-28 04:05:51,865 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 283 selfloop transitions, 82 changer transitions 0/369 dead transitions. [2024-06-28 04:05:51,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 369 transitions, 5334 flow [2024-06-28 04:05:51,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:05:51,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:05:51,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-28 04:05:51,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3979591836734694 [2024-06-28 04:05:51,866 INFO L175 Difference]: Start difference. First operand has 256 places, 341 transitions, 4278 flow. Second operand 7 states and 117 transitions. [2024-06-28 04:05:51,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 369 transitions, 5334 flow [2024-06-28 04:05:52,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 369 transitions, 5107 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-28 04:05:52,414 INFO L231 Difference]: Finished difference. Result has 255 places, 347 transitions, 4359 flow [2024-06-28 04:05:52,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4053, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4359, PETRI_PLACES=255, PETRI_TRANSITIONS=347} [2024-06-28 04:05:52,414 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 212 predicate places. [2024-06-28 04:05:52,414 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 347 transitions, 4359 flow [2024-06-28 04:05:52,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:05:52,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:05:52,415 INFO 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 04:05:52,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-28 04:05:52,415 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 04:05:52,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:05:52,415 INFO L85 PathProgramCache]: Analyzing trace with hash -833329080, now seen corresponding path program 4 times [2024-06-28 04:05:52,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:05:52,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785503869] [2024-06-28 04:05:52,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:05:52,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:05:52,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:05:54,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:05:54,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:05:54,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785503869] [2024-06-28 04:05:54,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785503869] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:05:54,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:05:54,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:05:54,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059833878] [2024-06-28 04:05:54,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:05:54,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:05:54,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:05:54,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:05:54,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:05:54,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:05:54,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 347 transitions, 4359 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:05:54,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:05:54,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:05:54,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:05:56,252 INFO L124 PetriNetUnfolderBase]: 2824/4472 cut-off events. [2024-06-28 04:05:56,252 INFO L125 PetriNetUnfolderBase]: For 281191/281193 co-relation queries the response was YES. [2024-06-28 04:05:56,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36268 conditions, 4472 events. 2824/4472 cut-off events. For 281191/281193 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 25210 event pairs, 605 based on Foata normal form. 1/4472 useless extension candidates. Maximal degree in co-relation 36145. Up to 4062 conditions per place. [2024-06-28 04:05:56,302 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 270 selfloop transitions, 93 changer transitions 0/367 dead transitions. [2024-06-28 04:05:56,302 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 367 transitions, 5328 flow [2024-06-28 04:05:56,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:05:56,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:05:56,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-28 04:05:56,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3877551020408163 [2024-06-28 04:05:56,304 INFO L175 Difference]: Start difference. First operand has 255 places, 347 transitions, 4359 flow. Second operand 7 states and 114 transitions. [2024-06-28 04:05:56,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 367 transitions, 5328 flow [2024-06-28 04:05:56,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 367 transitions, 5098 flow, removed 54 selfloop flow, removed 4 redundant places. [2024-06-28 04:05:56,798 INFO L231 Difference]: Finished difference. Result has 258 places, 350 transitions, 4390 flow [2024-06-28 04:05:56,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4153, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4390, PETRI_PLACES=258, PETRI_TRANSITIONS=350} [2024-06-28 04:05:56,798 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 215 predicate places. [2024-06-28 04:05:56,799 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 350 transitions, 4390 flow [2024-06-28 04:05:56,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:05:56,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:05:56,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:05:56,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-28 04:05:56,799 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 04:05:56,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:05:56,800 INFO L85 PathProgramCache]: Analyzing trace with hash -2099957684, now seen corresponding path program 1 times [2024-06-28 04:05:56,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:05:56,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791845087] [2024-06-28 04:05:56,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:05:56,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:05:56,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:05:59,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:05:59,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:05:59,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791845087] [2024-06-28 04:05:59,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791845087] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:05:59,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:05:59,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:05:59,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892932147] [2024-06-28 04:05:59,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:05:59,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:05:59,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:05:59,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:05:59,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:05:59,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:05:59,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 350 transitions, 4390 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:05:59,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:05:59,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:05:59,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:06:01,143 INFO L124 PetriNetUnfolderBase]: 2850/4533 cut-off events. [2024-06-28 04:06:01,143 INFO L125 PetriNetUnfolderBase]: For 293064/293078 co-relation queries the response was YES. [2024-06-28 04:06:01,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36575 conditions, 4533 events. 2850/4533 cut-off events. For 293064/293078 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 25885 event pairs, 730 based on Foata normal form. 16/4549 useless extension candidates. Maximal degree in co-relation 36451. Up to 4242 conditions per place. [2024-06-28 04:06:01,193 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 311 selfloop transitions, 67 changer transitions 0/382 dead transitions. [2024-06-28 04:06:01,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 382 transitions, 5510 flow [2024-06-28 04:06:01,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:06:01,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:06:01,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 139 transitions. [2024-06-28 04:06:01,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36772486772486773 [2024-06-28 04:06:01,194 INFO L175 Difference]: Start difference. First operand has 258 places, 350 transitions, 4390 flow. Second operand 9 states and 139 transitions. [2024-06-28 04:06:01,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 382 transitions, 5510 flow [2024-06-28 04:06:01,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 382 transitions, 5365 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-28 04:06:01,709 INFO L231 Difference]: Finished difference. Result has 264 places, 359 transitions, 4555 flow [2024-06-28 04:06:01,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4245, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4555, PETRI_PLACES=264, PETRI_TRANSITIONS=359} [2024-06-28 04:06:01,710 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 221 predicate places. [2024-06-28 04:06:01,710 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 359 transitions, 4555 flow [2024-06-28 04:06:01,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:06:01,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:06:01,710 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] [2024-06-28 04:06:01,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-28 04:06:01,711 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 04:06:01,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:06:01,711 INFO L85 PathProgramCache]: Analyzing trace with hash -549537190, now seen corresponding path program 2 times [2024-06-28 04:06:01,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:06:01,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181857245] [2024-06-28 04:06:01,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:06:01,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:06:01,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:06:03,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:06:03,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:06:03,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181857245] [2024-06-28 04:06:03,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181857245] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:06:03,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:06:03,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:06:03,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417660528] [2024-06-28 04:06:03,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:06:03,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:06:03,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:06:03,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:06:03,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:06:03,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:06:03,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 359 transitions, 4555 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:06:03,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:06:03,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:06:03,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:06:05,924 INFO L124 PetriNetUnfolderBase]: 2860/4551 cut-off events. [2024-06-28 04:06:05,924 INFO L125 PetriNetUnfolderBase]: For 303967/304013 co-relation queries the response was YES. [2024-06-28 04:06:05,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37037 conditions, 4551 events. 2860/4551 cut-off events. For 303967/304013 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 26040 event pairs, 745 based on Foata normal form. 38/4589 useless extension candidates. Maximal degree in co-relation 36911. Up to 4252 conditions per place. [2024-06-28 04:06:05,973 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 306 selfloop transitions, 70 changer transitions 0/380 dead transitions. [2024-06-28 04:06:05,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 380 transitions, 5566 flow [2024-06-28 04:06:05,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:06:05,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:06:05,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 136 transitions. [2024-06-28 04:06:05,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35978835978835977 [2024-06-28 04:06:05,974 INFO L175 Difference]: Start difference. First operand has 264 places, 359 transitions, 4555 flow. Second operand 9 states and 136 transitions. [2024-06-28 04:06:05,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 380 transitions, 5566 flow [2024-06-28 04:06:06,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 380 transitions, 5425 flow, removed 42 selfloop flow, removed 5 redundant places. [2024-06-28 04:06:06,660 INFO L231 Difference]: Finished difference. Result has 268 places, 362 transitions, 4631 flow [2024-06-28 04:06:06,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4428, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4631, PETRI_PLACES=268, PETRI_TRANSITIONS=362} [2024-06-28 04:06:06,661 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 225 predicate places. [2024-06-28 04:06:06,661 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 362 transitions, 4631 flow [2024-06-28 04:06:06,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:06:06,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:06:06,661 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:06:06,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-28 04:06:06,662 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 04:06:06,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:06:06,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1518997090, now seen corresponding path program 3 times [2024-06-28 04:06:06,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:06:06,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671186250] [2024-06-28 04:06:06,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:06:06,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:06:06,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:06:08,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:06:08,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:06:08,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671186250] [2024-06-28 04:06:08,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671186250] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:06:08,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:06:08,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:06:08,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277057458] [2024-06-28 04:06:08,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:06:08,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:06:08,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:06:08,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:06:08,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:06:08,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:06:08,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 362 transitions, 4631 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:06:08,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:06:08,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:06:08,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:06:10,737 INFO L124 PetriNetUnfolderBase]: 2854/4543 cut-off events. [2024-06-28 04:06:10,738 INFO L125 PetriNetUnfolderBase]: For 300443/300489 co-relation queries the response was YES. [2024-06-28 04:06:10,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36890 conditions, 4543 events. 2854/4543 cut-off events. For 300443/300489 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 26017 event pairs, 745 based on Foata normal form. 38/4581 useless extension candidates. Maximal degree in co-relation 36763. Up to 4247 conditions per place. [2024-06-28 04:06:10,785 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 304 selfloop transitions, 68 changer transitions 0/376 dead transitions. [2024-06-28 04:06:10,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 376 transitions, 5437 flow [2024-06-28 04:06:10,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:06:10,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:06:10,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-28 04:06:10,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3741496598639456 [2024-06-28 04:06:10,788 INFO L175 Difference]: Start difference. First operand has 268 places, 362 transitions, 4631 flow. Second operand 7 states and 110 transitions. [2024-06-28 04:06:10,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 376 transitions, 5437 flow [2024-06-28 04:06:11,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 376 transitions, 5237 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-06-28 04:06:11,393 INFO L231 Difference]: Finished difference. Result has 267 places, 362 transitions, 4580 flow [2024-06-28 04:06:11,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4431, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4580, PETRI_PLACES=267, PETRI_TRANSITIONS=362} [2024-06-28 04:06:11,394 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 224 predicate places. [2024-06-28 04:06:11,394 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 362 transitions, 4580 flow [2024-06-28 04:06:11,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:06:11,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:06:11,394 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:06:11,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-28 04:06:11,394 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 04:06:11,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:06:11,395 INFO L85 PathProgramCache]: Analyzing trace with hash -1519234612, now seen corresponding path program 5 times [2024-06-28 04:06:11,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:06:11,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732675933] [2024-06-28 04:06:11,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:06:11,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:06:11,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:06:13,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:06:13,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:06:13,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732675933] [2024-06-28 04:06:13,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732675933] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:06:13,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:06:13,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:06:13,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057019350] [2024-06-28 04:06:13,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:06:13,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:06:13,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:06:13,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:06:13,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:06:13,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:06:13,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 362 transitions, 4580 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:06:13,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:06:13,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:06:13,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:06:15,178 INFO L124 PetriNetUnfolderBase]: 2851/4517 cut-off events. [2024-06-28 04:06:15,179 INFO L125 PetriNetUnfolderBase]: For 296913/296951 co-relation queries the response was YES. [2024-06-28 04:06:15,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36708 conditions, 4517 events. 2851/4517 cut-off events. For 296913/296951 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 25584 event pairs, 647 based on Foata normal form. 21/4537 useless extension candidates. Maximal degree in co-relation 36581. Up to 4101 conditions per place. [2024-06-28 04:06:15,224 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 276 selfloop transitions, 93 changer transitions 0/373 dead transitions. [2024-06-28 04:06:15,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 373 transitions, 5350 flow [2024-06-28 04:06:15,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:06:15,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:06:15,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 109 transitions. [2024-06-28 04:06:15,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3707482993197279 [2024-06-28 04:06:15,226 INFO L175 Difference]: Start difference. First operand has 267 places, 362 transitions, 4580 flow. Second operand 7 states and 109 transitions. [2024-06-28 04:06:15,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 373 transitions, 5350 flow [2024-06-28 04:06:15,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 373 transitions, 5183 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-28 04:06:15,917 INFO L231 Difference]: Finished difference. Result has 267 places, 362 transitions, 4605 flow [2024-06-28 04:06:15,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4413, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4605, PETRI_PLACES=267, PETRI_TRANSITIONS=362} [2024-06-28 04:06:15,918 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 224 predicate places. [2024-06-28 04:06:15,918 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 362 transitions, 4605 flow [2024-06-28 04:06:15,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:06:15,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:06:15,918 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:06:15,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-28 04:06:15,918 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 04:06:15,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:06:15,919 INFO L85 PathProgramCache]: Analyzing trace with hash -655951110, now seen corresponding path program 1 times [2024-06-28 04:06:15,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:06:15,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552108598] [2024-06-28 04:06:15,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:06:15,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:06:15,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:06:19,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:06:19,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:06:19,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552108598] [2024-06-28 04:06:19,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552108598] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:06:19,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:06:19,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:06:19,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099692631] [2024-06-28 04:06:19,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:06:19,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:06:19,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:06:19,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:06:19,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:06:19,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:06:19,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 362 transitions, 4605 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 04:06:19,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:06:19,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:06:19,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:06:20,912 INFO L124 PetriNetUnfolderBase]: 2791/4435 cut-off events. [2024-06-28 04:06:20,912 INFO L125 PetriNetUnfolderBase]: For 319287/319294 co-relation queries the response was YES. [2024-06-28 04:06:20,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36280 conditions, 4435 events. 2791/4435 cut-off events. For 319287/319294 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 25302 event pairs, 573 based on Foata normal form. 14/4435 useless extension candidates. Maximal degree in co-relation 36153. Up to 4053 conditions per place. [2024-06-28 04:06:20,956 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 306 selfloop transitions, 46 changer transitions 0/381 dead transitions. [2024-06-28 04:06:20,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 381 transitions, 5439 flow [2024-06-28 04:06:20,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:06:20,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:06:20,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-28 04:06:20,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.391156462585034 [2024-06-28 04:06:20,958 INFO L175 Difference]: Start difference. First operand has 267 places, 362 transitions, 4605 flow. Second operand 7 states and 115 transitions. [2024-06-28 04:06:20,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 381 transitions, 5439 flow [2024-06-28 04:06:21,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 381 transitions, 5156 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-28 04:06:21,427 INFO L231 Difference]: Finished difference. Result has 267 places, 363 transitions, 4441 flow [2024-06-28 04:06:21,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4322, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4441, PETRI_PLACES=267, PETRI_TRANSITIONS=363} [2024-06-28 04:06:21,427 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 224 predicate places. [2024-06-28 04:06:21,428 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 363 transitions, 4441 flow [2024-06-28 04:06:21,428 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 04:06:21,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:06:21,428 INFO 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 04:06:21,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-28 04:06:21,428 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 04:06:21,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:06:21,429 INFO L85 PathProgramCache]: Analyzing trace with hash 801198220, now seen corresponding path program 4 times [2024-06-28 04:06:21,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:06:21,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492197983] [2024-06-28 04:06:21,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:06:21,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:06:21,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:06:23,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:06:23,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:06:23,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492197983] [2024-06-28 04:06:23,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492197983] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:06:23,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:06:23,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:06:23,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41491203] [2024-06-28 04:06:23,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:06:23,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:06:23,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:06:23,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:06:23,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:06:23,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:06:23,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 363 transitions, 4441 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:06:23,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:06:23,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:06:23,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:06:25,492 INFO L124 PetriNetUnfolderBase]: 2905/4617 cut-off events. [2024-06-28 04:06:25,493 INFO L125 PetriNetUnfolderBase]: For 307506/307520 co-relation queries the response was YES. [2024-06-28 04:06:25,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37365 conditions, 4617 events. 2905/4617 cut-off events. For 307506/307520 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 26424 event pairs, 743 based on Foata normal form. 16/4633 useless extension candidates. Maximal degree in co-relation 37237. Up to 4290 conditions per place. [2024-06-28 04:06:25,549 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 322 selfloop transitions, 69 changer transitions 0/395 dead transitions. [2024-06-28 04:06:25,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 395 transitions, 5609 flow [2024-06-28 04:06:25,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:06:25,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:06:25,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-28 04:06:25,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38392857142857145 [2024-06-28 04:06:25,551 INFO L175 Difference]: Start difference. First operand has 267 places, 363 transitions, 4441 flow. Second operand 8 states and 129 transitions. [2024-06-28 04:06:25,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 395 transitions, 5609 flow [2024-06-28 04:06:26,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 395 transitions, 5520 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-28 04:06:26,194 INFO L231 Difference]: Finished difference. Result has 271 places, 372 transitions, 4680 flow [2024-06-28 04:06:26,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4352, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4680, PETRI_PLACES=271, PETRI_TRANSITIONS=372} [2024-06-28 04:06:26,195 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 228 predicate places. [2024-06-28 04:06:26,195 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 372 transitions, 4680 flow [2024-06-28 04:06:26,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:06:26,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:06:26,195 INFO 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 04:06:26,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-28 04:06:26,195 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 04:06:26,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:06:26,196 INFO L85 PathProgramCache]: Analyzing trace with hash 623978202, now seen corresponding path program 5 times [2024-06-28 04:06:26,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:06:26,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678707041] [2024-06-28 04:06:26,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:06:26,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:06:26,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:06:28,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:06:28,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:06:28,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678707041] [2024-06-28 04:06:28,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678707041] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:06:28,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:06:28,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:06:28,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696115927] [2024-06-28 04:06:28,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:06:28,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:06:28,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:06:28,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:06:28,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:06:28,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:06:28,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 372 transitions, 4680 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:06:28,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:06:28,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:06:28,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:06:30,394 INFO L124 PetriNetUnfolderBase]: 2931/4661 cut-off events. [2024-06-28 04:06:30,394 INFO L125 PetriNetUnfolderBase]: For 322427/322473 co-relation queries the response was YES. [2024-06-28 04:06:30,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38313 conditions, 4661 events. 2931/4661 cut-off events. For 322427/322473 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 26745 event pairs, 759 based on Foata normal form. 38/4699 useless extension candidates. Maximal degree in co-relation 38183. Up to 4315 conditions per place. [2024-06-28 04:06:30,446 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 315 selfloop transitions, 77 changer transitions 0/396 dead transitions. [2024-06-28 04:06:30,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 396 transitions, 5924 flow [2024-06-28 04:06:30,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:06:30,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:06:30,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-28 04:06:30,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36904761904761907 [2024-06-28 04:06:30,448 INFO L175 Difference]: Start difference. First operand has 271 places, 372 transitions, 4680 flow. Second operand 8 states and 124 transitions. [2024-06-28 04:06:30,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 396 transitions, 5924 flow [2024-06-28 04:06:31,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 396 transitions, 5837 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-28 04:06:31,014 INFO L231 Difference]: Finished difference. Result has 276 places, 378 transitions, 4892 flow [2024-06-28 04:06:31,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4593, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4892, PETRI_PLACES=276, PETRI_TRANSITIONS=378} [2024-06-28 04:06:31,014 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 233 predicate places. [2024-06-28 04:06:31,014 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 378 transitions, 4892 flow [2024-06-28 04:06:31,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:06:31,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:06:31,015 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] [2024-06-28 04:06:31,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-28 04:06:31,015 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 04:06:31,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:06:31,015 INFO L85 PathProgramCache]: Analyzing trace with hash 2044218252, now seen corresponding path program 6 times [2024-06-28 04:06:31,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:06:31,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87435048] [2024-06-28 04:06:31,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:06:31,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:06:31,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:06:33,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:06:33,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:06:33,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87435048] [2024-06-28 04:06:33,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87435048] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:06:33,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:06:33,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:06:33,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579939377] [2024-06-28 04:06:33,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:06:33,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:06:33,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:06:33,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:06:33,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:06:33,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:06:33,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 378 transitions, 4892 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:06:33,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:06:33,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:06:33,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:06:35,741 INFO L124 PetriNetUnfolderBase]: 2925/4653 cut-off events. [2024-06-28 04:06:35,741 INFO L125 PetriNetUnfolderBase]: For 326419/326465 co-relation queries the response was YES. [2024-06-28 04:06:35,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38216 conditions, 4653 events. 2925/4653 cut-off events. For 326419/326465 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 26682 event pairs, 761 based on Foata normal form. 38/4691 useless extension candidates. Maximal degree in co-relation 38083. Up to 4310 conditions per place. [2024-06-28 04:06:35,792 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 311 selfloop transitions, 80 changer transitions 0/395 dead transitions. [2024-06-28 04:06:35,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 395 transitions, 5874 flow [2024-06-28 04:06:35,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:06:35,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:06:35,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-28 04:06:35,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36607142857142855 [2024-06-28 04:06:35,794 INFO L175 Difference]: Start difference. First operand has 276 places, 378 transitions, 4892 flow. Second operand 8 states and 123 transitions. [2024-06-28 04:06:35,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 395 transitions, 5874 flow [2024-06-28 04:06:36,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 395 transitions, 5667 flow, removed 53 selfloop flow, removed 4 redundant places. [2024-06-28 04:06:36,440 INFO L231 Difference]: Finished difference. Result has 280 places, 378 transitions, 4851 flow [2024-06-28 04:06:36,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4685, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4851, PETRI_PLACES=280, PETRI_TRANSITIONS=378} [2024-06-28 04:06:36,441 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 237 predicate places. [2024-06-28 04:06:36,441 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 378 transitions, 4851 flow [2024-06-28 04:06:36,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:06:36,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:06:36,442 INFO 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 04:06:36,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-28 04:06:36,442 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 04:06:36,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:06:36,442 INFO L85 PathProgramCache]: Analyzing trace with hash 530679424, now seen corresponding path program 7 times [2024-06-28 04:06:36,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:06:36,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520497544] [2024-06-28 04:06:36,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:06:36,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:06:36,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:06:38,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:06:38,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:06:38,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520497544] [2024-06-28 04:06:38,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520497544] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:06:38,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:06:38,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:06:38,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278256713] [2024-06-28 04:06:38,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:06:38,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:06:38,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:06:38,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:06:38,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:06:38,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:06:38,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 378 transitions, 4851 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:06:38,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:06:38,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:06:38,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:06:40,605 INFO L124 PetriNetUnfolderBase]: 2919/4641 cut-off events. [2024-06-28 04:06:40,605 INFO L125 PetriNetUnfolderBase]: For 331279/331325 co-relation queries the response was YES. [2024-06-28 04:06:40,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38019 conditions, 4641 events. 2919/4641 cut-off events. For 331279/331325 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 26629 event pairs, 752 based on Foata normal form. 38/4679 useless extension candidates. Maximal degree in co-relation 37885. Up to 4305 conditions per place. [2024-06-28 04:06:40,666 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 316 selfloop transitions, 75 changer transitions 0/395 dead transitions. [2024-06-28 04:06:40,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 395 transitions, 5717 flow [2024-06-28 04:06:40,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:06:40,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:06:40,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-28 04:06:40,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36904761904761907 [2024-06-28 04:06:40,667 INFO L175 Difference]: Start difference. First operand has 280 places, 378 transitions, 4851 flow. Second operand 8 states and 124 transitions. [2024-06-28 04:06:40,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 395 transitions, 5717 flow [2024-06-28 04:06:41,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 395 transitions, 5466 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-28 04:06:41,374 INFO L231 Difference]: Finished difference. Result has 281 places, 378 transitions, 4757 flow [2024-06-28 04:06:41,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4600, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4757, PETRI_PLACES=281, PETRI_TRANSITIONS=378} [2024-06-28 04:06:41,375 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 238 predicate places. [2024-06-28 04:06:41,375 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 378 transitions, 4757 flow [2024-06-28 04:06:41,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:06:41,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:06:41,375 INFO 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 04:06:41,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-28 04:06:41,375 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 04:06:41,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:06:41,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1202794426, now seen corresponding path program 2 times [2024-06-28 04:06:41,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:06:41,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340650576] [2024-06-28 04:06:41,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:06:41,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:06:41,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:06:44,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:06:44,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:06:44,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340650576] [2024-06-28 04:06:44,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340650576] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:06:44,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:06:44,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:06:44,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575599306] [2024-06-28 04:06:44,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:06:44,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:06:44,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:06:44,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:06:44,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:06:44,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:06:44,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 378 transitions, 4757 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 04:06:44,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:06:44,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:06:44,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:06:46,120 INFO L124 PetriNetUnfolderBase]: 2865/4543 cut-off events. [2024-06-28 04:06:46,121 INFO L125 PetriNetUnfolderBase]: For 362430/362437 co-relation queries the response was YES. [2024-06-28 04:06:46,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37411 conditions, 4543 events. 2865/4543 cut-off events. For 362430/362437 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 25923 event pairs, 580 based on Foata normal form. 14/4543 useless extension candidates. Maximal degree in co-relation 37277. Up to 4143 conditions per place. [2024-06-28 04:06:46,179 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 316 selfloop transitions, 49 changer transitions 0/399 dead transitions. [2024-06-28 04:06:46,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 399 transitions, 5631 flow [2024-06-28 04:06:46,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:06:46,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:06:46,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-28 04:06:46,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37797619047619047 [2024-06-28 04:06:46,180 INFO L175 Difference]: Start difference. First operand has 281 places, 378 transitions, 4757 flow. Second operand 8 states and 127 transitions. [2024-06-28 04:06:46,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 399 transitions, 5631 flow [2024-06-28 04:06:46,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 399 transitions, 5471 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-28 04:06:46,783 INFO L231 Difference]: Finished difference. Result has 283 places, 379 transitions, 4721 flow [2024-06-28 04:06:46,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4597, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4721, PETRI_PLACES=283, PETRI_TRANSITIONS=379} [2024-06-28 04:06:46,784 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 240 predicate places. [2024-06-28 04:06:46,784 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 379 transitions, 4721 flow [2024-06-28 04:06:46,784 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 04:06:46,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:06:46,784 INFO 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 04:06:46,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-28 04:06:46,785 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 04:06:46,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:06:46,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1217079226, now seen corresponding path program 3 times [2024-06-28 04:06:46,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:06:46,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438374159] [2024-06-28 04:06:46,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:06:46,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:06:46,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:06:49,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:06:49,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:06:49,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438374159] [2024-06-28 04:06:49,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438374159] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:06:49,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:06:49,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:06:49,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492938448] [2024-06-28 04:06:49,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:06:49,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:06:49,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:06:49,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:06:49,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:06:50,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:06:50,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 379 transitions, 4721 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 04:06:50,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:06:50,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:06:50,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:06:51,549 INFO L124 PetriNetUnfolderBase]: 2865/4547 cut-off events. [2024-06-28 04:06:51,549 INFO L125 PetriNetUnfolderBase]: For 357308/357315 co-relation queries the response was YES. [2024-06-28 04:06:51,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37293 conditions, 4547 events. 2865/4547 cut-off events. For 357308/357315 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 25974 event pairs, 574 based on Foata normal form. 10/4543 useless extension candidates. Maximal degree in co-relation 37158. Up to 4073 conditions per place. [2024-06-28 04:06:51,605 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 317 selfloop transitions, 51 changer transitions 0/402 dead transitions. [2024-06-28 04:06:51,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 402 transitions, 5623 flow [2024-06-28 04:06:51,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:06:51,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:06:51,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-28 04:06:51,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-28 04:06:51,607 INFO L175 Difference]: Start difference. First operand has 283 places, 379 transitions, 4721 flow. Second operand 8 states and 128 transitions. [2024-06-28 04:06:51,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 402 transitions, 5623 flow [2024-06-28 04:06:52,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 402 transitions, 5521 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-28 04:06:52,183 INFO L231 Difference]: Finished difference. Result has 285 places, 380 transitions, 4747 flow [2024-06-28 04:06:52,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4619, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4747, PETRI_PLACES=285, PETRI_TRANSITIONS=380} [2024-06-28 04:06:52,184 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 242 predicate places. [2024-06-28 04:06:52,184 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 380 transitions, 4747 flow [2024-06-28 04:06:52,184 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 04:06:52,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:06:52,184 INFO 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 04:06:52,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-28 04:06:52,184 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 04:06:52,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:06:52,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1857385856, now seen corresponding path program 1 times [2024-06-28 04:06:52,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:06:52,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223200354] [2024-06-28 04:06:52,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:06:52,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:06:52,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:06:55,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:06:55,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:06:55,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223200354] [2024-06-28 04:06:55,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223200354] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:06:55,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:06:55,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:06:55,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908585708] [2024-06-28 04:06:55,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:06:55,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:06:55,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:06:55,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:06:55,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:06:55,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:06:55,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 380 transitions, 4747 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 04:06:55,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:06:55,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:06:55,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:06:57,368 INFO L124 PetriNetUnfolderBase]: 2922/4679 cut-off events. [2024-06-28 04:06:57,369 INFO L125 PetriNetUnfolderBase]: For 364623/364638 co-relation queries the response was YES. [2024-06-28 04:06:57,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38358 conditions, 4679 events. 2922/4679 cut-off events. For 364623/364638 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 27089 event pairs, 691 based on Foata normal form. 18/4689 useless extension candidates. Maximal degree in co-relation 38222. Up to 4175 conditions per place. [2024-06-28 04:06:57,426 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 320 selfloop transitions, 67 changer transitions 0/418 dead transitions. [2024-06-28 04:06:57,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 418 transitions, 5855 flow [2024-06-28 04:06:57,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:06:57,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:06:57,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-28 04:06:57,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-28 04:06:57,427 INFO L175 Difference]: Start difference. First operand has 285 places, 380 transitions, 4747 flow. Second operand 9 states and 153 transitions. [2024-06-28 04:06:57,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 418 transitions, 5855 flow [2024-06-28 04:06:58,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 418 transitions, 5745 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-28 04:06:58,133 INFO L231 Difference]: Finished difference. Result has 288 places, 384 transitions, 4856 flow [2024-06-28 04:06:58,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4637, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4856, PETRI_PLACES=288, PETRI_TRANSITIONS=384} [2024-06-28 04:06:58,133 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 245 predicate places. [2024-06-28 04:06:58,133 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 384 transitions, 4856 flow [2024-06-28 04:06:58,133 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 04:06:58,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:06:58,134 INFO 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 04:06:58,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-28 04:06:58,134 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 04:06:58,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:06:58,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1857325406, now seen corresponding path program 2 times [2024-06-28 04:06:58,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:06:58,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869505982] [2024-06-28 04:06:58,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:06:58,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:06:58,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:07:01,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:07:01,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:07:01,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869505982] [2024-06-28 04:07:01,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869505982] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:07:01,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:07:01,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:07:01,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112041114] [2024-06-28 04:07:01,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:07:01,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:07:01,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:07:01,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:07:01,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:07:01,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:07:01,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 384 transitions, 4856 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 04:07:01,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:07:01,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:07:01,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:07:03,199 INFO L124 PetriNetUnfolderBase]: 2936/4701 cut-off events. [2024-06-28 04:07:03,199 INFO L125 PetriNetUnfolderBase]: For 374846/374861 co-relation queries the response was YES. [2024-06-28 04:07:03,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38790 conditions, 4701 events. 2936/4701 cut-off events. For 374846/374861 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 27217 event pairs, 735 based on Foata normal form. 18/4711 useless extension candidates. Maximal degree in co-relation 38653. Up to 4324 conditions per place. [2024-06-28 04:07:03,261 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 340 selfloop transitions, 43 changer transitions 0/414 dead transitions. [2024-06-28 04:07:03,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 414 transitions, 5770 flow [2024-06-28 04:07:03,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:07:03,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:07:03,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-28 04:07:03,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3783068783068783 [2024-06-28 04:07:03,263 INFO L175 Difference]: Start difference. First operand has 288 places, 384 transitions, 4856 flow. Second operand 9 states and 143 transitions. [2024-06-28 04:07:03,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 414 transitions, 5770 flow [2024-06-28 04:07:03,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 414 transitions, 5607 flow, removed 39 selfloop flow, removed 5 redundant places. [2024-06-28 04:07:03,998 INFO L231 Difference]: Finished difference. Result has 292 places, 386 transitions, 4830 flow [2024-06-28 04:07:03,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4715, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4830, PETRI_PLACES=292, PETRI_TRANSITIONS=386} [2024-06-28 04:07:03,998 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 249 predicate places. [2024-06-28 04:07:03,999 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 386 transitions, 4830 flow [2024-06-28 04:07:03,999 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 04:07:03,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:07:03,999 INFO 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 04:07:03,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-28 04:07:03,999 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 04:07:04,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:07:04,000 INFO L85 PathProgramCache]: Analyzing trace with hash 682940846, now seen corresponding path program 1 times [2024-06-28 04:07:04,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:07:04,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675521196] [2024-06-28 04:07:04,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:07:04,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:07:04,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:07:06,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:07:06,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:07:06,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675521196] [2024-06-28 04:07:06,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675521196] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:07:06,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:07:06,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:07:06,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119802405] [2024-06-28 04:07:06,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:07:06,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:07:06,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:07:06,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:07:06,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:07:06,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:07:06,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 386 transitions, 4830 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:07:06,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:07:06,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:07:06,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:07:08,441 INFO L124 PetriNetUnfolderBase]: 3049/4836 cut-off events. [2024-06-28 04:07:08,441 INFO L125 PetriNetUnfolderBase]: For 387679/387679 co-relation queries the response was YES. [2024-06-28 04:07:08,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39997 conditions, 4836 events. 3049/4836 cut-off events. For 387679/387679 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 27939 event pairs, 1380 based on Foata normal form. 2/4838 useless extension candidates. Maximal degree in co-relation 39858. Up to 4548 conditions per place. [2024-06-28 04:07:08,505 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 353 selfloop transitions, 78 changer transitions 0/435 dead transitions. [2024-06-28 04:07:08,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 435 transitions, 6341 flow [2024-06-28 04:07:08,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:07:08,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:07:08,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-28 04:07:08,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-28 04:07:08,507 INFO L175 Difference]: Start difference. First operand has 292 places, 386 transitions, 4830 flow. Second operand 9 states and 150 transitions. [2024-06-28 04:07:08,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 435 transitions, 6341 flow [2024-06-28 04:07:09,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 435 transitions, 6239 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-28 04:07:09,465 INFO L231 Difference]: Finished difference. Result has 297 places, 402 transitions, 5219 flow [2024-06-28 04:07:09,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4735, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5219, PETRI_PLACES=297, PETRI_TRANSITIONS=402} [2024-06-28 04:07:09,465 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 254 predicate places. [2024-06-28 04:07:09,465 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 402 transitions, 5219 flow [2024-06-28 04:07:09,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:07:09,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:07:09,466 INFO 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 04:07:09,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-28 04:07:09,466 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 04:07:09,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:07:09,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1854524122, now seen corresponding path program 2 times [2024-06-28 04:07:09,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:07:09,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685849438] [2024-06-28 04:07:09,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:07:09,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:07:09,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:07:13,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:07:13,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:07:13,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685849438] [2024-06-28 04:07:13,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685849438] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:07:13,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:07:13,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:07:13,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236272639] [2024-06-28 04:07:13,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:07:13,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:07:13,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:07:13,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:07:13,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:07:13,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:07:13,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 402 transitions, 5219 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:07:13,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:07:13,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:07:13,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:07:14,995 INFO L124 PetriNetUnfolderBase]: 3059/4850 cut-off events. [2024-06-28 04:07:14,995 INFO L125 PetriNetUnfolderBase]: For 400816/400816 co-relation queries the response was YES. [2024-06-28 04:07:15,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40841 conditions, 4850 events. 3059/4850 cut-off events. For 400816/400816 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 28077 event pairs, 1383 based on Foata normal form. 2/4852 useless extension candidates. Maximal degree in co-relation 40698. Up to 4687 conditions per place. [2024-06-28 04:07:15,058 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 403 selfloop transitions, 21 changer transitions 0/428 dead transitions. [2024-06-28 04:07:15,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 428 transitions, 6211 flow [2024-06-28 04:07:15,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:07:15,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:07:15,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 133 transitions. [2024-06-28 04:07:15,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35185185185185186 [2024-06-28 04:07:15,060 INFO L175 Difference]: Start difference. First operand has 297 places, 402 transitions, 5219 flow. Second operand 9 states and 133 transitions. [2024-06-28 04:07:15,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 428 transitions, 6211 flow [2024-06-28 04:07:15,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 428 transitions, 6095 flow, removed 39 selfloop flow, removed 3 redundant places. [2024-06-28 04:07:15,928 INFO L231 Difference]: Finished difference. Result has 303 places, 405 transitions, 5213 flow [2024-06-28 04:07:15,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5105, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5213, PETRI_PLACES=303, PETRI_TRANSITIONS=405} [2024-06-28 04:07:15,929 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 260 predicate places. [2024-06-28 04:07:15,929 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 405 transitions, 5213 flow [2024-06-28 04:07:15,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:07:15,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:07:15,930 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] [2024-06-28 04:07:15,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-28 04:07:15,930 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 04:07:15,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:07:15,930 INFO L85 PathProgramCache]: Analyzing trace with hash 685737232, now seen corresponding path program 3 times [2024-06-28 04:07:15,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:07:15,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136750189] [2024-06-28 04:07:15,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:07:15,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:07:15,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:07:19,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:07:19,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:07:19,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136750189] [2024-06-28 04:07:19,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136750189] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:07:19,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:07:19,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:07:19,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039411016] [2024-06-28 04:07:19,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:07:19,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:07:19,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:07:19,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:07:19,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:07:19,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:07:19,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 405 transitions, 5213 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 04:07:19,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:07:19,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:07:19,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:07:20,719 INFO L124 PetriNetUnfolderBase]: 2971/4746 cut-off events. [2024-06-28 04:07:20,719 INFO L125 PetriNetUnfolderBase]: For 402605/402620 co-relation queries the response was YES. [2024-06-28 04:07:20,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39992 conditions, 4746 events. 2971/4746 cut-off events. For 402605/402620 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 27441 event pairs, 735 based on Foata normal form. 18/4756 useless extension candidates. Maximal degree in co-relation 39847. Up to 4368 conditions per place. [2024-06-28 04:07:20,784 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 350 selfloop transitions, 45 changer transitions 0/431 dead transitions. [2024-06-28 04:07:20,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 431 transitions, 6135 flow [2024-06-28 04:07:20,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:07:20,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:07:20,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 139 transitions. [2024-06-28 04:07:20,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36772486772486773 [2024-06-28 04:07:20,787 INFO L175 Difference]: Start difference. First operand has 303 places, 405 transitions, 5213 flow. Second operand 9 states and 139 transitions. [2024-06-28 04:07:20,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 431 transitions, 6135 flow [2024-06-28 04:07:21,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 431 transitions, 6051 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-28 04:07:21,668 INFO L231 Difference]: Finished difference. Result has 305 places, 407 transitions, 5270 flow [2024-06-28 04:07:21,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5129, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5270, PETRI_PLACES=305, PETRI_TRANSITIONS=407} [2024-06-28 04:07:21,668 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 262 predicate places. [2024-06-28 04:07:21,668 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 407 transitions, 5270 flow [2024-06-28 04:07:21,669 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 04:07:21,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:07:21,669 INFO 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 04:07:21,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-28 04:07:21,669 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 04:07:21,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:07:21,669 INFO L85 PathProgramCache]: Analyzing trace with hash -1854528772, now seen corresponding path program 3 times [2024-06-28 04:07:21,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:07:21,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17913522] [2024-06-28 04:07:21,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:07:21,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:07:21,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:07:24,913 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 04:07:24,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:07:24,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17913522] [2024-06-28 04:07:24,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17913522] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:07:24,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:07:24,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:07:24,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693505984] [2024-06-28 04:07:24,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:07:24,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:07:24,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:07:24,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:07:24,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:07:24,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:07:24,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 407 transitions, 5270 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:07:24,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:07:24,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:07:24,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:07:26,701 INFO L124 PetriNetUnfolderBase]: 3043/4828 cut-off events. [2024-06-28 04:07:26,702 INFO L125 PetriNetUnfolderBase]: For 405787/405787 co-relation queries the response was YES. [2024-06-28 04:07:26,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40898 conditions, 4828 events. 3043/4828 cut-off events. For 405787/405787 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 27947 event pairs, 1374 based on Foata normal form. 2/4830 useless extension candidates. Maximal degree in co-relation 40752. Up to 4599 conditions per place. [2024-06-28 04:07:26,765 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 369 selfloop transitions, 66 changer transitions 0/439 dead transitions. [2024-06-28 04:07:26,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 439 transitions, 6336 flow [2024-06-28 04:07:26,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:07:26,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:07:26,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 151 transitions. [2024-06-28 04:07:26,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3595238095238095 [2024-06-28 04:07:26,767 INFO L175 Difference]: Start difference. First operand has 305 places, 407 transitions, 5270 flow. Second operand 10 states and 151 transitions. [2024-06-28 04:07:26,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 439 transitions, 6336 flow [2024-06-28 04:07:27,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 439 transitions, 6208 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-28 04:07:27,650 INFO L231 Difference]: Finished difference. Result has 309 places, 413 transitions, 5389 flow [2024-06-28 04:07:27,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5145, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5389, PETRI_PLACES=309, PETRI_TRANSITIONS=413} [2024-06-28 04:07:27,650 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 266 predicate places. [2024-06-28 04:07:27,651 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 413 transitions, 5389 flow [2024-06-28 04:07:27,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:07:27,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:07:27,651 INFO 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 04:07:27,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-28 04:07:27,651 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 04:07:27,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:07:27,652 INFO L85 PathProgramCache]: Analyzing trace with hash 801033176, now seen corresponding path program 4 times [2024-06-28 04:07:27,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:07:27,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341095546] [2024-06-28 04:07:27,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:07:27,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:07:27,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:07:30,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:07:30,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:07:30,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341095546] [2024-06-28 04:07:30,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341095546] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:07:30,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:07:30,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:07:30,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550228308] [2024-06-28 04:07:30,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:07:30,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:07:30,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:07:30,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:07:30,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:07:30,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:07:30,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 413 transitions, 5389 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:07:30,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:07:30,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:07:30,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:07:32,345 INFO L124 PetriNetUnfolderBase]: 3053/4842 cut-off events. [2024-06-28 04:07:32,345 INFO L125 PetriNetUnfolderBase]: For 416058/416058 co-relation queries the response was YES. [2024-06-28 04:07:32,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41392 conditions, 4842 events. 3053/4842 cut-off events. For 416058/416058 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 28022 event pairs, 1376 based on Foata normal form. 2/4844 useless extension candidates. Maximal degree in co-relation 41244. Up to 4663 conditions per place. [2024-06-28 04:07:32,414 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 392 selfloop transitions, 40 changer transitions 0/436 dead transitions. [2024-06-28 04:07:32,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 436 transitions, 6370 flow [2024-06-28 04:07:32,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:07:32,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:07:32,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 136 transitions. [2024-06-28 04:07:32,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35978835978835977 [2024-06-28 04:07:32,415 INFO L175 Difference]: Start difference. First operand has 309 places, 413 transitions, 5389 flow. Second operand 9 states and 136 transitions. [2024-06-28 04:07:32,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 436 transitions, 6370 flow [2024-06-28 04:07:33,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 436 transitions, 6239 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-28 04:07:33,495 INFO L231 Difference]: Finished difference. Result has 312 places, 416 transitions, 5396 flow [2024-06-28 04:07:33,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5258, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5396, PETRI_PLACES=312, PETRI_TRANSITIONS=416} [2024-06-28 04:07:33,495 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 269 predicate places. [2024-06-28 04:07:33,496 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 416 transitions, 5396 flow [2024-06-28 04:07:33,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:07:33,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:07:33,496 INFO 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 04:07:33,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-28 04:07:33,497 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 04:07:33,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:07:33,498 INFO L85 PathProgramCache]: Analyzing trace with hash 801028402, now seen corresponding path program 4 times [2024-06-28 04:07:33,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:07:33,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230753298] [2024-06-28 04:07:33,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:07:33,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:07:33,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:07:36,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:07:36,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:07:36,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230753298] [2024-06-28 04:07:36,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230753298] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:07:36,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:07:36,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:07:36,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53669327] [2024-06-28 04:07:36,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:07:36,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:07:36,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:07:36,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:07:36,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:07:36,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:07:36,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 416 transitions, 5396 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 04:07:36,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:07:36,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:07:36,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:07:38,365 INFO L124 PetriNetUnfolderBase]: 2988/4773 cut-off events. [2024-06-28 04:07:38,365 INFO L125 PetriNetUnfolderBase]: For 428230/428245 co-relation queries the response was YES. [2024-06-28 04:07:38,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40821 conditions, 4773 events. 2988/4773 cut-off events. For 428230/428245 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 27699 event pairs, 744 based on Foata normal form. 18/4783 useless extension candidates. Maximal degree in co-relation 40671. Up to 4411 conditions per place. [2024-06-28 04:07:38,433 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 350 selfloop transitions, 49 changer transitions 0/438 dead transitions. [2024-06-28 04:07:38,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 438 transitions, 6292 flow [2024-06-28 04:07:38,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:07:38,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:07:38,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 137 transitions. [2024-06-28 04:07:38,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36243386243386244 [2024-06-28 04:07:38,435 INFO L175 Difference]: Start difference. First operand has 312 places, 416 transitions, 5396 flow. Second operand 9 states and 137 transitions. [2024-06-28 04:07:38,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 438 transitions, 6292 flow [2024-06-28 04:07:39,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 438 transitions, 6189 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-28 04:07:39,434 INFO L231 Difference]: Finished difference. Result has 314 places, 418 transitions, 5425 flow [2024-06-28 04:07:39,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5293, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5425, PETRI_PLACES=314, PETRI_TRANSITIONS=418} [2024-06-28 04:07:39,435 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 271 predicate places. [2024-06-28 04:07:39,435 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 418 transitions, 5425 flow [2024-06-28 04:07:39,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:07:39,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:07:39,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:07:39,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-28 04:07:39,436 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 04:07:39,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:07:39,436 INFO L85 PathProgramCache]: Analyzing trace with hash 801028526, now seen corresponding path program 5 times [2024-06-28 04:07:39,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:07:39,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134078320] [2024-06-28 04:07:39,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:07:39,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:07:39,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:07:41,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:07:41,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:07:41,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134078320] [2024-06-28 04:07:41,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134078320] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:07:41,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:07:41,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:07:41,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151656770] [2024-06-28 04:07:41,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:07:41,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:07:41,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:07:41,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:07:41,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:07:41,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:07:41,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 418 transitions, 5425 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:07:41,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:07:41,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:07:41,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:07:43,525 INFO L124 PetriNetUnfolderBase]: 3103/4913 cut-off events. [2024-06-28 04:07:43,526 INFO L125 PetriNetUnfolderBase]: For 445555/445555 co-relation queries the response was YES. [2024-06-28 04:07:43,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42533 conditions, 4913 events. 3103/4913 cut-off events. For 445555/445555 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 28436 event pairs, 1387 based on Foata normal form. 2/4915 useless extension candidates. Maximal degree in co-relation 42382. Up to 4693 conditions per place. [2024-06-28 04:07:43,591 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 388 selfloop transitions, 58 changer transitions 0/450 dead transitions. [2024-06-28 04:07:43,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 450 transitions, 6877 flow [2024-06-28 04:07:43,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:07:43,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:07:43,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-28 04:07:43,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37566137566137564 [2024-06-28 04:07:43,594 INFO L175 Difference]: Start difference. First operand has 314 places, 418 transitions, 5425 flow. Second operand 9 states and 142 transitions. [2024-06-28 04:07:43,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 450 transitions, 6877 flow [2024-06-28 04:07:44,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 450 transitions, 6765 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-28 04:07:44,577 INFO L231 Difference]: Finished difference. Result has 318 places, 428 transitions, 5662 flow [2024-06-28 04:07:44,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5315, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5662, PETRI_PLACES=318, PETRI_TRANSITIONS=428} [2024-06-28 04:07:44,579 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 275 predicate places. [2024-06-28 04:07:44,579 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 428 transitions, 5662 flow [2024-06-28 04:07:44,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:07:44,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:07:44,579 INFO 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 04:07:44,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-28 04:07:44,579 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 04:07:44,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:07:44,580 INFO L85 PathProgramCache]: Analyzing trace with hash 801206156, now seen corresponding path program 6 times [2024-06-28 04:07:44,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:07:44,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133899075] [2024-06-28 04:07:44,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:07:44,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:07:44,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:07:47,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:07:47,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:07:47,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133899075] [2024-06-28 04:07:47,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133899075] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:07:47,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:07:47,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:07:47,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167904124] [2024-06-28 04:07:47,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:07:47,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:07:47,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:07:47,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:07:47,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:07:47,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:07:47,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 428 transitions, 5662 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:07:47,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:07:47,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:07:47,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:07:49,560 INFO L124 PetriNetUnfolderBase]: 3209/5068 cut-off events. [2024-06-28 04:07:49,560 INFO L125 PetriNetUnfolderBase]: For 487961/487969 co-relation queries the response was YES. [2024-06-28 04:07:49,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44991 conditions, 5068 events. 3209/5068 cut-off events. For 487961/487969 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 29384 event pairs, 1232 based on Foata normal form. 10/5078 useless extension candidates. Maximal degree in co-relation 44837. Up to 4315 conditions per place. [2024-06-28 04:07:49,624 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 325 selfloop transitions, 154 changer transitions 0/483 dead transitions. [2024-06-28 04:07:49,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 483 transitions, 7458 flow [2024-06-28 04:07:49,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:07:49,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:07:49,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 160 transitions. [2024-06-28 04:07:49,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-28 04:07:49,626 INFO L175 Difference]: Start difference. First operand has 318 places, 428 transitions, 5662 flow. Second operand 10 states and 160 transitions. [2024-06-28 04:07:49,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 483 transitions, 7458 flow [2024-06-28 04:07:50,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 483 transitions, 7346 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-28 04:07:50,996 INFO L231 Difference]: Finished difference. Result has 325 places, 452 transitions, 6443 flow [2024-06-28 04:07:50,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5556, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6443, PETRI_PLACES=325, PETRI_TRANSITIONS=452} [2024-06-28 04:07:50,996 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 282 predicate places. [2024-06-28 04:07:50,996 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 452 transitions, 6443 flow [2024-06-28 04:07:50,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:07:50,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:07:50,997 INFO 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 04:07:50,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-28 04:07:50,997 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 04:07:50,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:07:50,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1739053276, now seen corresponding path program 1 times [2024-06-28 04:07:50,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:07:50,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937058579] [2024-06-28 04:07:50,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:07:50,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:07:51,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:07:53,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:07:53,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:07:53,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937058579] [2024-06-28 04:07:53,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937058579] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:07:53,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:07:53,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:07:53,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528941697] [2024-06-28 04:07:53,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:07:53,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:07:53,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:07:53,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:07:53,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:07:53,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:07:53,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 452 transitions, 6443 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:07:53,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:07:53,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:07:53,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:07:55,835 INFO L124 PetriNetUnfolderBase]: 3204/5059 cut-off events. [2024-06-28 04:07:55,836 INFO L125 PetriNetUnfolderBase]: For 500689/500689 co-relation queries the response was YES. [2024-06-28 04:07:55,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46750 conditions, 5059 events. 3204/5059 cut-off events. For 500689/500689 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 29209 event pairs, 1405 based on Foata normal form. 1/5060 useless extension candidates. Maximal degree in co-relation 46593. Up to 4878 conditions per place. [2024-06-28 04:07:55,898 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 423 selfloop transitions, 42 changer transitions 0/469 dead transitions. [2024-06-28 04:07:55,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 469 transitions, 7430 flow [2024-06-28 04:07:55,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:07:55,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:07:55,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-28 04:07:55,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36904761904761907 [2024-06-28 04:07:55,899 INFO L175 Difference]: Start difference. First operand has 325 places, 452 transitions, 6443 flow. Second operand 8 states and 124 transitions. [2024-06-28 04:07:55,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 469 transitions, 7430 flow [2024-06-28 04:07:56,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 469 transitions, 7274 flow, removed 39 selfloop flow, removed 7 redundant places. [2024-06-28 04:07:56,974 INFO L231 Difference]: Finished difference. Result has 326 places, 452 transitions, 6382 flow [2024-06-28 04:07:56,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6287, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6382, PETRI_PLACES=326, PETRI_TRANSITIONS=452} [2024-06-28 04:07:56,975 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 283 predicate places. [2024-06-28 04:07:56,975 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 452 transitions, 6382 flow [2024-06-28 04:07:56,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:07:56,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:07:56,975 INFO 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 04:07:56,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-28 04:07:56,975 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 04:07:56,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:07:56,976 INFO L85 PathProgramCache]: Analyzing trace with hash 801213100, now seen corresponding path program 1 times [2024-06-28 04:07:56,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:07:56,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899729626] [2024-06-28 04:07:56,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:07:56,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:07:56,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:08:00,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:08:00,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:08:00,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899729626] [2024-06-28 04:08:00,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899729626] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:08:00,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:08:00,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:08:00,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108727356] [2024-06-28 04:08:00,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:08:00,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:08:00,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:08:00,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:08:00,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:08:00,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:08:00,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 452 transitions, 6382 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:08:00,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:08:00,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:08:00,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:08:02,211 INFO L124 PetriNetUnfolderBase]: 3212/5071 cut-off events. [2024-06-28 04:08:02,212 INFO L125 PetriNetUnfolderBase]: For 515212/515212 co-relation queries the response was YES. [2024-06-28 04:08:02,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46902 conditions, 5071 events. 3212/5071 cut-off events. For 515212/515212 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 29359 event pairs, 1401 based on Foata normal form. 2/5073 useless extension candidates. Maximal degree in co-relation 46744. Up to 4893 conditions per place. [2024-06-28 04:08:02,278 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 430 selfloop transitions, 37 changer transitions 0/471 dead transitions. [2024-06-28 04:08:02,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 471 transitions, 7414 flow [2024-06-28 04:08:02,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:08:02,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:08:02,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-28 04:08:02,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36607142857142855 [2024-06-28 04:08:02,279 INFO L175 Difference]: Start difference. First operand has 326 places, 452 transitions, 6382 flow. Second operand 8 states and 123 transitions. [2024-06-28 04:08:02,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 471 transitions, 7414 flow [2024-06-28 04:08:03,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 471 transitions, 7328 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-28 04:08:03,508 INFO L231 Difference]: Finished difference. Result has 327 places, 454 transitions, 6425 flow [2024-06-28 04:08:03,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6296, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6425, PETRI_PLACES=327, PETRI_TRANSITIONS=454} [2024-06-28 04:08:03,508 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 284 predicate places. [2024-06-28 04:08:03,508 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 454 transitions, 6425 flow [2024-06-28 04:08:03,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:08:03,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:08:03,509 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] [2024-06-28 04:08:03,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-28 04:08:03,509 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 04:08:03,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:08:03,509 INFO L85 PathProgramCache]: Analyzing trace with hash 629557024, now seen corresponding path program 2 times [2024-06-28 04:08:03,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:08:03,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868034970] [2024-06-28 04:08:03,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:08:03,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:08:03,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:08:06,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:08:06,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:08:06,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868034970] [2024-06-28 04:08:06,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868034970] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:08:06,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:08:06,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:08:06,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414880850] [2024-06-28 04:08:06,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:08:06,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:08:06,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:08:06,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:08:06,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:08:06,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:08:06,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 454 transitions, 6425 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:08:06,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:08:06,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:08:06,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:08:08,845 INFO L124 PetriNetUnfolderBase]: 3209/5068 cut-off events. [2024-06-28 04:08:08,846 INFO L125 PetriNetUnfolderBase]: For 519480/519488 co-relation queries the response was YES. [2024-06-28 04:08:08,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47055 conditions, 5068 events. 3209/5068 cut-off events. For 519480/519488 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 29323 event pairs, 1397 based on Foata normal form. 9/5077 useless extension candidates. Maximal degree in co-relation 46896. Up to 4886 conditions per place. [2024-06-28 04:08:08,911 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 419 selfloop transitions, 44 changer transitions 0/467 dead transitions. [2024-06-28 04:08:08,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 467 transitions, 7393 flow [2024-06-28 04:08:08,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:08:08,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:08:08,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 118 transitions. [2024-06-28 04:08:08,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35119047619047616 [2024-06-28 04:08:08,912 INFO L175 Difference]: Start difference. First operand has 327 places, 454 transitions, 6425 flow. Second operand 8 states and 118 transitions. [2024-06-28 04:08:08,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 467 transitions, 7393 flow [2024-06-28 04:08:10,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 467 transitions, 7264 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-28 04:08:10,253 INFO L231 Difference]: Finished difference. Result has 329 places, 454 transitions, 6396 flow [2024-06-28 04:08:10,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6296, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6396, PETRI_PLACES=329, PETRI_TRANSITIONS=454} [2024-06-28 04:08:10,256 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 286 predicate places. [2024-06-28 04:08:10,256 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 454 transitions, 6396 flow [2024-06-28 04:08:10,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:08:10,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:08:10,256 INFO 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 04:08:10,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-28 04:08:10,256 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 04:08:10,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:08:10,257 INFO L85 PathProgramCache]: Analyzing trace with hash 767166334, now seen corresponding path program 2 times [2024-06-28 04:08:10,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:08:10,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358711762] [2024-06-28 04:08:10,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:08:10,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:08:10,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:08:13,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:08:13,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:08:13,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358711762] [2024-06-28 04:08:13,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358711762] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:08:13,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:08:13,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:08:13,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348910307] [2024-06-28 04:08:13,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:08:13,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:08:13,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:08:13,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:08:13,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:08:13,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:08:13,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 454 transitions, 6396 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:08:13,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:08:13,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:08:13,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:08:15,307 INFO L124 PetriNetUnfolderBase]: 3217/5080 cut-off events. [2024-06-28 04:08:15,307 INFO L125 PetriNetUnfolderBase]: For 535773/535781 co-relation queries the response was YES. [2024-06-28 04:08:15,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47251 conditions, 5080 events. 3217/5080 cut-off events. For 535773/535781 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 29428 event pairs, 1390 based on Foata normal form. 10/5090 useless extension candidates. Maximal degree in co-relation 47091. Up to 4876 conditions per place. [2024-06-28 04:08:15,383 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 427 selfloop transitions, 42 changer transitions 0/473 dead transitions. [2024-06-28 04:08:15,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 473 transitions, 7632 flow [2024-06-28 04:08:15,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:08:15,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:08:15,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 118 transitions. [2024-06-28 04:08:15,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35119047619047616 [2024-06-28 04:08:15,384 INFO L175 Difference]: Start difference. First operand has 329 places, 454 transitions, 6396 flow. Second operand 8 states and 118 transitions. [2024-06-28 04:08:15,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 473 transitions, 7632 flow [2024-06-28 04:08:16,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 473 transitions, 7460 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-28 04:08:16,788 INFO L231 Difference]: Finished difference. Result has 329 places, 458 transitions, 6417 flow [2024-06-28 04:08:16,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6224, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6417, PETRI_PLACES=329, PETRI_TRANSITIONS=458} [2024-06-28 04:08:16,788 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 286 predicate places. [2024-06-28 04:08:16,788 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 458 transitions, 6417 flow [2024-06-28 04:08:16,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:08:16,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:08:16,789 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:08:16,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-28 04:08:16,789 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 04:08:16,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:08:16,789 INFO L85 PathProgramCache]: Analyzing trace with hash 980613148, now seen corresponding path program 3 times [2024-06-28 04:08:16,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:08:16,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857899648] [2024-06-28 04:08:16,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:08:16,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:08:16,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:08:20,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:08:20,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:08:20,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857899648] [2024-06-28 04:08:20,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857899648] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:08:20,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:08:20,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:08:20,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873486948] [2024-06-28 04:08:20,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:08:20,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:08:20,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:08:20,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:08:20,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:08:20,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:08:20,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 458 transitions, 6417 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:08:20,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:08:20,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:08:20,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:08:22,352 INFO L124 PetriNetUnfolderBase]: 3225/5092 cut-off events. [2024-06-28 04:08:22,353 INFO L125 PetriNetUnfolderBase]: For 549570/549578 co-relation queries the response was YES. [2024-06-28 04:08:22,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47590 conditions, 5092 events. 3225/5092 cut-off events. For 549570/549578 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 29472 event pairs, 1406 based on Foata normal form. 10/5102 useless extension candidates. Maximal degree in co-relation 47430. Up to 4913 conditions per place. [2024-06-28 04:08:22,428 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 432 selfloop transitions, 37 changer transitions 0/473 dead transitions. [2024-06-28 04:08:22,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 473 transitions, 7445 flow [2024-06-28 04:08:22,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:08:22,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:08:22,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 119 transitions. [2024-06-28 04:08:22,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3541666666666667 [2024-06-28 04:08:22,429 INFO L175 Difference]: Start difference. First operand has 329 places, 458 transitions, 6417 flow. Second operand 8 states and 119 transitions. [2024-06-28 04:08:22,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 473 transitions, 7445 flow [2024-06-28 04:08:23,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 473 transitions, 7304 flow, removed 44 selfloop flow, removed 5 redundant places. [2024-06-28 04:08:23,798 INFO L231 Difference]: Finished difference. Result has 332 places, 460 transitions, 6413 flow [2024-06-28 04:08:23,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6298, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=458, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6413, PETRI_PLACES=332, PETRI_TRANSITIONS=460} [2024-06-28 04:08:23,799 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 289 predicate places. [2024-06-28 04:08:23,799 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 460 transitions, 6413 flow [2024-06-28 04:08:23,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:08:23,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:08:23,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:08:23,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-28 04:08:23,799 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 04:08:23,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:08:23,828 INFO L85 PathProgramCache]: Analyzing trace with hash 758595454, now seen corresponding path program 4 times [2024-06-28 04:08:23,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:08:23,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969762591] [2024-06-28 04:08:23,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:08:23,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:08:23,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:08:26,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:08:26,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:08:26,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969762591] [2024-06-28 04:08:26,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969762591] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:08:26,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:08:26,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:08:26,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90655055] [2024-06-28 04:08:26,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:08:26,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:08:26,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:08:26,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:08:26,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:08:26,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:08:26,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 460 transitions, 6413 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:08:26,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:08:26,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:08:26,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:08:28,824 INFO L124 PetriNetUnfolderBase]: 3220/5085 cut-off events. [2024-06-28 04:08:28,824 INFO L125 PetriNetUnfolderBase]: For 553304/553312 co-relation queries the response was YES. [2024-06-28 04:08:28,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47318 conditions, 5085 events. 3220/5085 cut-off events. For 553304/553312 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 29485 event pairs, 1405 based on Foata normal form. 10/5095 useless extension candidates. Maximal degree in co-relation 47157. Up to 4906 conditions per place. [2024-06-28 04:08:28,894 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 431 selfloop transitions, 38 changer transitions 0/473 dead transitions. [2024-06-28 04:08:28,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 473 transitions, 7387 flow [2024-06-28 04:08:28,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:08:28,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:08:28,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 117 transitions. [2024-06-28 04:08:28,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3482142857142857 [2024-06-28 04:08:28,896 INFO L175 Difference]: Start difference. First operand has 332 places, 460 transitions, 6413 flow. Second operand 8 states and 117 transitions. [2024-06-28 04:08:28,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 473 transitions, 7387 flow [2024-06-28 04:08:30,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 473 transitions, 7286 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-28 04:08:30,169 INFO L231 Difference]: Finished difference. Result has 334 places, 460 transitions, 6393 flow [2024-06-28 04:08:30,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6312, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6393, PETRI_PLACES=334, PETRI_TRANSITIONS=460} [2024-06-28 04:08:30,169 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 291 predicate places. [2024-06-28 04:08:30,169 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 460 transitions, 6393 flow [2024-06-28 04:08:30,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:08:30,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:08:30,170 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:08:30,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-28 04:08:30,170 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 04:08:30,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:08:30,171 INFO L85 PathProgramCache]: Analyzing trace with hash -17499546, now seen corresponding path program 7 times [2024-06-28 04:08:30,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:08:30,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129639470] [2024-06-28 04:08:30,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:08:30,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:08:30,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:08:32,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:08:32,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:08:32,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129639470] [2024-06-28 04:08:32,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129639470] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:08:32,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:08:32,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:08:32,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317715163] [2024-06-28 04:08:32,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:08:32,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:08:32,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:08:32,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:08:32,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:08:32,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:08:32,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 460 transitions, 6393 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:08:32,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:08:32,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:08:32,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:08:35,052 INFO L124 PetriNetUnfolderBase]: 3283/5175 cut-off events. [2024-06-28 04:08:35,052 INFO L125 PetriNetUnfolderBase]: For 592001/592019 co-relation queries the response was YES. [2024-06-28 04:08:35,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48981 conditions, 5175 events. 3283/5175 cut-off events. For 592001/592019 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 30040 event pairs, 1235 based on Foata normal form. 20/5195 useless extension candidates. Maximal degree in co-relation 48819. Up to 4412 conditions per place. [2024-06-28 04:08:35,132 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 333 selfloop transitions, 170 changer transitions 0/507 dead transitions. [2024-06-28 04:08:35,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 507 transitions, 8118 flow [2024-06-28 04:08:35,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 04:08:35,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 04:08:35,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 176 transitions. [2024-06-28 04:08:35,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3492063492063492 [2024-06-28 04:08:35,133 INFO L175 Difference]: Start difference. First operand has 334 places, 460 transitions, 6393 flow. Second operand 12 states and 176 transitions. [2024-06-28 04:08:35,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 507 transitions, 8118 flow [2024-06-28 04:08:36,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 507 transitions, 8023 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-28 04:08:36,506 INFO L231 Difference]: Finished difference. Result has 340 places, 479 transitions, 7255 flow [2024-06-28 04:08:36,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6298, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7255, PETRI_PLACES=340, PETRI_TRANSITIONS=479} [2024-06-28 04:08:36,507 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 297 predicate places. [2024-06-28 04:08:36,507 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 479 transitions, 7255 flow [2024-06-28 04:08:36,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:08:36,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:08:36,507 INFO 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 04:08:36,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-28 04:08:36,507 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 04:08:36,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:08:36,508 INFO L85 PathProgramCache]: Analyzing trace with hash 758588510, now seen corresponding path program 8 times [2024-06-28 04:08:36,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:08:36,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512751880] [2024-06-28 04:08:36,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:08:36,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:08:36,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:08:39,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:08:39,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:08:39,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512751880] [2024-06-28 04:08:39,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512751880] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:08:39,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:08:39,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:08:39,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645521099] [2024-06-28 04:08:39,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:08:39,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:08:39,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:08:39,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:08:39,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:08:39,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:08:39,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 479 transitions, 7255 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:08:39,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:08:39,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:08:39,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:08:41,153 INFO L124 PetriNetUnfolderBase]: 3293/5187 cut-off events. [2024-06-28 04:08:41,153 INFO L125 PetriNetUnfolderBase]: For 612678/612686 co-relation queries the response was YES. [2024-06-28 04:08:41,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50849 conditions, 5187 events. 3293/5187 cut-off events. For 612678/612686 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 29979 event pairs, 1398 based on Foata normal form. 10/5197 useless extension candidates. Maximal degree in co-relation 50685. Up to 4995 conditions per place. [2024-06-28 04:08:41,230 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 444 selfloop transitions, 51 changer transitions 0/499 dead transitions. [2024-06-28 04:08:41,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 499 transitions, 8371 flow [2024-06-28 04:08:41,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 04:08:41,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 04:08:41,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 151 transitions. [2024-06-28 04:08:41,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3268398268398268 [2024-06-28 04:08:41,231 INFO L175 Difference]: Start difference. First operand has 340 places, 479 transitions, 7255 flow. Second operand 11 states and 151 transitions. [2024-06-28 04:08:41,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 499 transitions, 8371 flow [2024-06-28 04:08:42,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 499 transitions, 8254 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-28 04:08:42,751 INFO L231 Difference]: Finished difference. Result has 344 places, 482 transitions, 7317 flow [2024-06-28 04:08:42,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7138, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7317, PETRI_PLACES=344, PETRI_TRANSITIONS=482} [2024-06-28 04:08:42,752 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 301 predicate places. [2024-06-28 04:08:42,752 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 482 transitions, 7317 flow [2024-06-28 04:08:42,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:08:42,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:08:42,752 INFO 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 04:08:42,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-28 04:08:42,752 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 04:08:42,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:08:42,753 INFO L85 PathProgramCache]: Analyzing trace with hash 530514380, now seen corresponding path program 9 times [2024-06-28 04:08:42,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:08:42,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777540200] [2024-06-28 04:08:42,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:08:42,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:08:42,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:08:45,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:08:45,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:08:45,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777540200] [2024-06-28 04:08:45,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777540200] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:08:45,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:08:45,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:08:45,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688498021] [2024-06-28 04:08:45,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:08:45,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:08:45,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:08:45,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:08:45,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:08:45,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:08:45,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 482 transitions, 7317 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:08:45,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:08:45,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:08:45,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:08:47,249 INFO L124 PetriNetUnfolderBase]: 3303/5201 cut-off events. [2024-06-28 04:08:47,249 INFO L125 PetriNetUnfolderBase]: For 626342/626350 co-relation queries the response was YES. [2024-06-28 04:08:47,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51197 conditions, 5201 events. 3303/5201 cut-off events. For 626342/626350 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 30072 event pairs, 1406 based on Foata normal form. 10/5211 useless extension candidates. Maximal degree in co-relation 51031. Up to 4993 conditions per place. [2024-06-28 04:08:47,328 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 435 selfloop transitions, 65 changer transitions 0/504 dead transitions. [2024-06-28 04:08:47,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 504 transitions, 8469 flow [2024-06-28 04:08:47,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 04:08:47,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 04:08:47,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 154 transitions. [2024-06-28 04:08:47,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2024-06-28 04:08:47,330 INFO L175 Difference]: Start difference. First operand has 344 places, 482 transitions, 7317 flow. Second operand 11 states and 154 transitions. [2024-06-28 04:08:47,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 504 transitions, 8469 flow [2024-06-28 04:08:48,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 504 transitions, 8339 flow, removed 23 selfloop flow, removed 8 redundant places. [2024-06-28 04:08:48,935 INFO L231 Difference]: Finished difference. Result has 347 places, 485 transitions, 7399 flow [2024-06-28 04:08:48,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7187, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7399, PETRI_PLACES=347, PETRI_TRANSITIONS=485} [2024-06-28 04:08:48,936 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 304 predicate places. [2024-06-28 04:08:48,936 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 485 transitions, 7399 flow [2024-06-28 04:08:48,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:08:48,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:08:48,936 INFO 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 04:08:48,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-28 04:08:48,936 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 04:08:48,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:08:48,937 INFO L85 PathProgramCache]: Analyzing trace with hash 530509730, now seen corresponding path program 10 times [2024-06-28 04:08:48,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:08:48,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535462585] [2024-06-28 04:08:48,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:08:48,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:08:48,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:08:51,560 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 04:08:51,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:08:51,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535462585] [2024-06-28 04:08:51,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535462585] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:08:51,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:08:51,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:08:51,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797193015] [2024-06-28 04:08:51,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:08:51,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:08:51,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:08:51,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:08:51,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:08:51,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:08:51,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 485 transitions, 7399 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:08:51,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:08:51,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:08:51,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:08:53,356 INFO L124 PetriNetUnfolderBase]: 3297/5193 cut-off events. [2024-06-28 04:08:53,357 INFO L125 PetriNetUnfolderBase]: For 632361/632369 co-relation queries the response was YES. [2024-06-28 04:08:53,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51106 conditions, 5193 events. 3297/5193 cut-off events. For 632361/632369 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 29986 event pairs, 1405 based on Foata normal form. 10/5203 useless extension candidates. Maximal degree in co-relation 50939. Up to 4956 conditions per place. [2024-06-28 04:08:53,442 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 430 selfloop transitions, 72 changer transitions 0/506 dead transitions. [2024-06-28 04:08:53,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 506 transitions, 8542 flow [2024-06-28 04:08:53,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:08:53,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:08:53,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 134 transitions. [2024-06-28 04:08:53,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3544973544973545 [2024-06-28 04:08:53,443 INFO L175 Difference]: Start difference. First operand has 347 places, 485 transitions, 7399 flow. Second operand 9 states and 134 transitions. [2024-06-28 04:08:53,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 506 transitions, 8542 flow [2024-06-28 04:08:54,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 506 transitions, 8350 flow, removed 42 selfloop flow, removed 7 redundant places. [2024-06-28 04:08:54,880 INFO L231 Difference]: Finished difference. Result has 350 places, 488 transitions, 7430 flow [2024-06-28 04:08:54,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7219, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7430, PETRI_PLACES=350, PETRI_TRANSITIONS=488} [2024-06-28 04:08:54,881 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 307 predicate places. [2024-06-28 04:08:54,881 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 488 transitions, 7430 flow [2024-06-28 04:08:54,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:08:54,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:08:54,881 INFO 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 04:08:54,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-28 04:08:54,881 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 04:08:54,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:08:54,882 INFO L85 PathProgramCache]: Analyzing trace with hash 966667536, now seen corresponding path program 5 times [2024-06-28 04:08:54,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:08:54,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522386776] [2024-06-28 04:08:54,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:08:54,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:08:54,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:08:57,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:08:57,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:08:57,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522386776] [2024-06-28 04:08:57,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522386776] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:08:57,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:08:57,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:08:57,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022290500] [2024-06-28 04:08:57,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:08:57,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:08:57,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:08:57,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:08:57,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:08:57,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:08:57,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 488 transitions, 7430 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 04:08:57,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:08:57,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:08:57,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:08:59,668 INFO L124 PetriNetUnfolderBase]: 3187/5065 cut-off events. [2024-06-28 04:08:59,668 INFO L125 PetriNetUnfolderBase]: For 634659/634721 co-relation queries the response was YES. [2024-06-28 04:08:59,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49697 conditions, 5065 events. 3187/5065 cut-off events. For 634659/634721 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 29421 event pairs, 757 based on Foata normal form. 52/5105 useless extension candidates. Maximal degree in co-relation 49528. Up to 4660 conditions per place. [2024-06-28 04:08:59,743 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 391 selfloop transitions, 52 changer transitions 0/503 dead transitions. [2024-06-28 04:08:59,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 503 transitions, 8364 flow [2024-06-28 04:08:59,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:08:59,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:08:59,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 133 transitions. [2024-06-28 04:08:59,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35185185185185186 [2024-06-28 04:08:59,745 INFO L175 Difference]: Start difference. First operand has 350 places, 488 transitions, 7430 flow. Second operand 9 states and 133 transitions. [2024-06-28 04:08:59,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 503 transitions, 8364 flow [2024-06-28 04:09:01,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 503 transitions, 8244 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-28 04:09:01,301 INFO L231 Difference]: Finished difference. Result has 354 places, 488 transitions, 7420 flow [2024-06-28 04:09:01,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7310, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=436, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7420, PETRI_PLACES=354, PETRI_TRANSITIONS=488} [2024-06-28 04:09:01,304 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 311 predicate places. [2024-06-28 04:09:01,311 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 488 transitions, 7420 flow [2024-06-28 04:09:01,311 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 04:09:01,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:09:01,312 INFO 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 04:09:01,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-28 04:09:01,312 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 04:09:01,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:09:01,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1202358975, now seen corresponding path program 1 times [2024-06-28 04:09:01,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:09:01,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328049027] [2024-06-28 04:09:01,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:09:01,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:09:01,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:09:03,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:09:03,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:09:03,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328049027] [2024-06-28 04:09:03,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328049027] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:09:03,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:09:03,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:09:03,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18099208] [2024-06-28 04:09:03,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:09:03,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:09:03,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:09:03,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:09:03,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:09:03,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:09:03,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 488 transitions, 7420 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:09:03,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:09:03,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:09:03,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:09:06,175 INFO L124 PetriNetUnfolderBase]: 3517/5520 cut-off events. [2024-06-28 04:09:06,175 INFO L125 PetriNetUnfolderBase]: For 695168/695174 co-relation queries the response was YES. [2024-06-28 04:09:06,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53833 conditions, 5520 events. 3517/5520 cut-off events. For 695168/695174 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 31964 event pairs, 654 based on Foata normal form. 14/5534 useless extension candidates. Maximal degree in co-relation 53662. Up to 5047 conditions per place. [2024-06-28 04:09:06,267 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 505 selfloop transitions, 70 changer transitions 0/579 dead transitions. [2024-06-28 04:09:06,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 579 transitions, 9456 flow [2024-06-28 04:09:06,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-28 04:09:06,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-28 04:09:06,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 212 transitions. [2024-06-28 04:09:06,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3882783882783883 [2024-06-28 04:09:06,269 INFO L175 Difference]: Start difference. First operand has 354 places, 488 transitions, 7420 flow. Second operand 13 states and 212 transitions. [2024-06-28 04:09:06,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 579 transitions, 9456 flow [2024-06-28 04:09:08,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 579 transitions, 9320 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-28 04:09:08,283 INFO L231 Difference]: Finished difference. Result has 364 places, 523 transitions, 7933 flow [2024-06-28 04:09:08,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7294, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=437, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7933, PETRI_PLACES=364, PETRI_TRANSITIONS=523} [2024-06-28 04:09:08,296 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 321 predicate places. [2024-06-28 04:09:08,297 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 523 transitions, 7933 flow [2024-06-28 04:09:08,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:09:08,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:09:08,297 INFO 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 04:09:08,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-28 04:09:08,297 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 04:09:08,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:09:08,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1377936733, now seen corresponding path program 2 times [2024-06-28 04:09:08,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:09:08,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422724531] [2024-06-28 04:09:08,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:09:08,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:09:08,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:09:10,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:09:10,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:09:10,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422724531] [2024-06-28 04:09:10,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422724531] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:09:10,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:09:10,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:09:10,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401996671] [2024-06-28 04:09:10,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:09:10,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:09:10,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:09:10,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:09:10,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:09:10,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:09:10,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 523 transitions, 7933 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:09:10,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:09:10,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:09:10,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:09:13,153 INFO L124 PetriNetUnfolderBase]: 3545/5559 cut-off events. [2024-06-28 04:09:13,153 INFO L125 PetriNetUnfolderBase]: For 712838/712844 co-relation queries the response was YES. [2024-06-28 04:09:13,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54776 conditions, 5559 events. 3545/5559 cut-off events. For 712838/712844 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 31967 event pairs, 497 based on Foata normal form. 8/5567 useless extension candidates. Maximal degree in co-relation 54599. Up to 4805 conditions per place. [2024-06-28 04:09:13,236 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 469 selfloop transitions, 80 changer transitions 0/553 dead transitions. [2024-06-28 04:09:13,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 553 transitions, 9449 flow [2024-06-28 04:09:13,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:09:13,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:09:13,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-28 04:09:13,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-28 04:09:13,238 INFO L175 Difference]: Start difference. First operand has 364 places, 523 transitions, 7933 flow. Second operand 8 states and 132 transitions. [2024-06-28 04:09:13,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 553 transitions, 9449 flow [2024-06-28 04:09:15,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 553 transitions, 9360 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-28 04:09:15,078 INFO L231 Difference]: Finished difference. Result has 367 places, 524 transitions, 8034 flow [2024-06-28 04:09:15,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7844, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=523, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=444, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8034, PETRI_PLACES=367, PETRI_TRANSITIONS=524} [2024-06-28 04:09:15,078 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 324 predicate places. [2024-06-28 04:09:15,078 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 524 transitions, 8034 flow [2024-06-28 04:09:15,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:09:15,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:09:15,079 INFO 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 04:09:15,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-28 04:09:15,079 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 04:09:15,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:09:15,079 INFO L85 PathProgramCache]: Analyzing trace with hash 777740145, now seen corresponding path program 3 times [2024-06-28 04:09:15,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:09:15,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540199763] [2024-06-28 04:09:15,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:09:15,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:09:15,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:09:17,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:09:17,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:09:17,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540199763] [2024-06-28 04:09:17,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540199763] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:09:17,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:09:17,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:09:17,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521002472] [2024-06-28 04:09:17,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:09:17,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:09:17,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:09:17,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:09:17,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:09:17,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:09:17,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 524 transitions, 8034 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:09:17,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:09:17,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:09:17,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:09:19,536 INFO L124 PetriNetUnfolderBase]: 3509/5507 cut-off events. [2024-06-28 04:09:19,537 INFO L125 PetriNetUnfolderBase]: For 694359/694365 co-relation queries the response was YES. [2024-06-28 04:09:19,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53389 conditions, 5507 events. 3509/5507 cut-off events. For 694359/694365 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 31653 event pairs, 640 based on Foata normal form. 16/5523 useless extension candidates. Maximal degree in co-relation 53212. Up to 5051 conditions per place. [2024-06-28 04:09:19,628 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 473 selfloop transitions, 70 changer transitions 0/547 dead transitions. [2024-06-28 04:09:19,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 547 transitions, 9318 flow [2024-06-28 04:09:19,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:09:19,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:09:19,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-28 04:09:19,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37797619047619047 [2024-06-28 04:09:19,630 INFO L175 Difference]: Start difference. First operand has 367 places, 524 transitions, 8034 flow. Second operand 8 states and 127 transitions. [2024-06-28 04:09:19,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 547 transitions, 9318 flow [2024-06-28 04:09:21,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 547 transitions, 9134 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-28 04:09:21,747 INFO L231 Difference]: Finished difference. Result has 368 places, 524 transitions, 7995 flow [2024-06-28 04:09:21,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7850, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=454, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7995, PETRI_PLACES=368, PETRI_TRANSITIONS=524} [2024-06-28 04:09:21,749 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 325 predicate places. [2024-06-28 04:09:21,749 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 524 transitions, 7995 flow [2024-06-28 04:09:21,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:09:21,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:09:21,750 INFO 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 04:09:21,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-28 04:09:21,750 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 04:09:21,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:09:21,750 INFO L85 PathProgramCache]: Analyzing trace with hash 493920727, now seen corresponding path program 1 times [2024-06-28 04:09:21,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:09:21,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566790386] [2024-06-28 04:09:21,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:09:21,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:09:21,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:09:24,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:09:24,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:09:24,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566790386] [2024-06-28 04:09:24,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566790386] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:09:24,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:09:24,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:09:24,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810031322] [2024-06-28 04:09:24,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:09:24,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:09:24,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:09:24,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:09:24,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:09:24,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:09:24,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 524 transitions, 7995 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:09:24,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:09:24,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:09:24,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:09:26,423 INFO L124 PetriNetUnfolderBase]: 3514/5522 cut-off events. [2024-06-28 04:09:26,423 INFO L125 PetriNetUnfolderBase]: For 636468/636478 co-relation queries the response was YES. [2024-06-28 04:09:26,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53118 conditions, 5522 events. 3514/5522 cut-off events. For 636468/636478 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 31811 event pairs, 667 based on Foata normal form. 5/5527 useless extension candidates. Maximal degree in co-relation 52942. Up to 5097 conditions per place. [2024-06-28 04:09:26,512 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 457 selfloop transitions, 86 changer transitions 0/547 dead transitions. [2024-06-28 04:09:26,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 547 transitions, 9244 flow [2024-06-28 04:09:26,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:09:26,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:09:26,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-28 04:09:26,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3979591836734694 [2024-06-28 04:09:26,514 INFO L175 Difference]: Start difference. First operand has 368 places, 524 transitions, 7995 flow. Second operand 7 states and 117 transitions. [2024-06-28 04:09:26,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 547 transitions, 9244 flow [2024-06-28 04:09:28,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 547 transitions, 9044 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-28 04:09:28,565 INFO L231 Difference]: Finished difference. Result has 368 places, 527 transitions, 8077 flow [2024-06-28 04:09:28,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7795, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8077, PETRI_PLACES=368, PETRI_TRANSITIONS=527} [2024-06-28 04:09:28,566 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 325 predicate places. [2024-06-28 04:09:28,566 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 527 transitions, 8077 flow [2024-06-28 04:09:28,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:09:28,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:09:28,567 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:09:28,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-28 04:09:28,567 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 04:09:28,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:09:28,567 INFO L85 PathProgramCache]: Analyzing trace with hash 494040883, now seen corresponding path program 1 times [2024-06-28 04:09:28,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:09:28,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530794599] [2024-06-28 04:09:28,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:09:28,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:09:28,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:09:30,856 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 04:09:30,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:09:30,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530794599] [2024-06-28 04:09:30,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530794599] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:09:30,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:09:30,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:09:30,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107764776] [2024-06-28 04:09:30,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:09:30,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:09:30,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:09:30,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:09:30,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:09:30,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:09:30,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 527 transitions, 8077 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:09:30,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:09:30,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:09:30,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:09:33,379 INFO L124 PetriNetUnfolderBase]: 3570/5595 cut-off events. [2024-06-28 04:09:33,379 INFO L125 PetriNetUnfolderBase]: For 663279/663287 co-relation queries the response was YES. [2024-06-28 04:09:33,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54279 conditions, 5595 events. 3570/5595 cut-off events. For 663279/663287 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 32250 event pairs, 664 based on Foata normal form. 4/5599 useless extension candidates. Maximal degree in co-relation 54102. Up to 5119 conditions per place. [2024-06-28 04:09:33,452 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 436 selfloop transitions, 126 changer transitions 0/566 dead transitions. [2024-06-28 04:09:33,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 566 transitions, 9842 flow [2024-06-28 04:09:33,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:09:33,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:09:33,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-28 04:09:33,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-28 04:09:33,454 INFO L175 Difference]: Start difference. First operand has 368 places, 527 transitions, 8077 flow. Second operand 8 states and 133 transitions. [2024-06-28 04:09:33,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 566 transitions, 9842 flow [2024-06-28 04:09:35,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 566 transitions, 9593 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-28 04:09:35,373 INFO L231 Difference]: Finished difference. Result has 372 places, 544 transitions, 8568 flow [2024-06-28 04:09:35,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7830, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8568, PETRI_PLACES=372, PETRI_TRANSITIONS=544} [2024-06-28 04:09:35,373 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 329 predicate places. [2024-06-28 04:09:35,373 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 544 transitions, 8568 flow [2024-06-28 04:09:35,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:09:35,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:09:35,374 INFO 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 04:09:35,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-28 04:09:35,374 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:09:35,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:09:35,374 INFO L85 PathProgramCache]: Analyzing trace with hash 494040697, now seen corresponding path program 2 times [2024-06-28 04:09:35,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:09:35,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809337676] [2024-06-28 04:09:35,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:09:35,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:09:35,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:09:37,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:09:37,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:09:37,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809337676] [2024-06-28 04:09:37,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809337676] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:09:37,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:09:37,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 04:09:37,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665482946] [2024-06-28 04:09:37,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:09:37,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 04:09:37,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:09:37,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 04:09:37,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-28 04:09:37,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:09:37,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 544 transitions, 8568 flow. Second operand has 11 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:09:37,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:09:37,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:09:37,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:09:39,796 INFO L124 PetriNetUnfolderBase]: 3575/5605 cut-off events. [2024-06-28 04:09:39,796 INFO L125 PetriNetUnfolderBase]: For 663806/663816 co-relation queries the response was YES. [2024-06-28 04:09:39,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54929 conditions, 5605 events. 3575/5605 cut-off events. For 663806/663816 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 32298 event pairs, 672 based on Foata normal form. 5/5610 useless extension candidates. Maximal degree in co-relation 54750. Up to 5203 conditions per place. [2024-06-28 04:09:39,882 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 461 selfloop transitions, 98 changer transitions 0/563 dead transitions. [2024-06-28 04:09:39,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 563 transitions, 9830 flow [2024-06-28 04:09:39,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:09:39,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:09:39,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-28 04:09:39,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.391156462585034 [2024-06-28 04:09:39,884 INFO L175 Difference]: Start difference. First operand has 372 places, 544 transitions, 8568 flow. Second operand 7 states and 115 transitions. [2024-06-28 04:09:39,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 563 transitions, 9830 flow [2024-06-28 04:09:42,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 563 transitions, 9680 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-28 04:09:42,192 INFO L231 Difference]: Finished difference. Result has 374 places, 547 transitions, 8721 flow [2024-06-28 04:09:42,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8418, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=544, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=446, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8721, PETRI_PLACES=374, PETRI_TRANSITIONS=547} [2024-06-28 04:09:42,193 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 331 predicate places. [2024-06-28 04:09:42,194 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 547 transitions, 8721 flow [2024-06-28 04:09:42,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:09:42,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:09:42,194 INFO 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 04:09:42,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-28 04:09:42,194 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:09:42,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:09:42,195 INFO L85 PathProgramCache]: Analyzing trace with hash 778069551, now seen corresponding path program 2 times [2024-06-28 04:09:42,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:09:42,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022779804] [2024-06-28 04:09:42,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:09:42,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:09:42,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:09:44,501 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 04:09:44,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:09:44,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022779804] [2024-06-28 04:09:44,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022779804] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:09:44,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:09:44,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:09:44,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730702558] [2024-06-28 04:09:44,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:09:44,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:09:44,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:09:44,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:09:44,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:09:44,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:09:44,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 547 transitions, 8721 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:09:44,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:09:44,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:09:44,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:09:47,284 INFO L124 PetriNetUnfolderBase]: 3585/5616 cut-off events. [2024-06-28 04:09:47,284 INFO L125 PetriNetUnfolderBase]: For 682904/682912 co-relation queries the response was YES. [2024-06-28 04:09:47,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55541 conditions, 5616 events. 3585/5616 cut-off events. For 682904/682912 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 32376 event pairs, 658 based on Foata normal form. 4/5620 useless extension candidates. Maximal degree in co-relation 55361. Up to 5136 conditions per place. [2024-06-28 04:09:47,363 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 429 selfloop transitions, 141 changer transitions 0/574 dead transitions. [2024-06-28 04:09:47,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 574 transitions, 10266 flow [2024-06-28 04:09:47,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:09:47,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:09:47,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 156 transitions. [2024-06-28 04:09:47,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37142857142857144 [2024-06-28 04:09:47,365 INFO L175 Difference]: Start difference. First operand has 374 places, 547 transitions, 8721 flow. Second operand 10 states and 156 transitions. [2024-06-28 04:09:47,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 574 transitions, 10266 flow [2024-06-28 04:09:49,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 574 transitions, 10020 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-28 04:09:49,345 INFO L231 Difference]: Finished difference. Result has 379 places, 551 transitions, 8935 flow [2024-06-28 04:09:49,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8479, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8935, PETRI_PLACES=379, PETRI_TRANSITIONS=551} [2024-06-28 04:09:49,346 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 336 predicate places. [2024-06-28 04:09:49,346 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 551 transitions, 8935 flow [2024-06-28 04:09:49,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:09:49,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:09:49,347 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:09:49,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-28 04:09:49,347 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:09:49,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:09:49,347 INFO L85 PathProgramCache]: Analyzing trace with hash -191864649, now seen corresponding path program 3 times [2024-06-28 04:09:49,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:09:49,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032157431] [2024-06-28 04:09:49,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:09:49,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:09:49,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:09:51,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:09:51,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:09:51,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032157431] [2024-06-28 04:09:51,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032157431] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:09:51,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:09:51,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:09:51,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626732126] [2024-06-28 04:09:51,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:09:51,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:09:51,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:09:51,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:09:51,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:09:51,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:09:51,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 551 transitions, 8935 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:09:51,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:09:51,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:09:51,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:09:54,477 INFO L124 PetriNetUnfolderBase]: 3579/5608 cut-off events. [2024-06-28 04:09:54,478 INFO L125 PetriNetUnfolderBase]: For 675283/675291 co-relation queries the response was YES. [2024-06-28 04:09:54,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55386 conditions, 5608 events. 3579/5608 cut-off events. For 675283/675291 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 32307 event pairs, 657 based on Foata normal form. 4/5612 useless extension candidates. Maximal degree in co-relation 55205. Up to 5131 conditions per place. [2024-06-28 04:09:54,566 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 432 selfloop transitions, 138 changer transitions 0/574 dead transitions. [2024-06-28 04:09:54,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 574 transitions, 10188 flow [2024-06-28 04:09:54,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:09:54,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:09:54,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 158 transitions. [2024-06-28 04:09:54,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3761904761904762 [2024-06-28 04:09:54,567 INFO L175 Difference]: Start difference. First operand has 379 places, 551 transitions, 8935 flow. Second operand 10 states and 158 transitions. [2024-06-28 04:09:54,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 574 transitions, 10188 flow [2024-06-28 04:09:56,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 574 transitions, 9901 flow, removed 56 selfloop flow, removed 6 redundant places. [2024-06-28 04:09:56,534 INFO L231 Difference]: Finished difference. Result has 383 places, 551 transitions, 8940 flow [2024-06-28 04:09:56,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8648, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8940, PETRI_PLACES=383, PETRI_TRANSITIONS=551} [2024-06-28 04:09:56,534 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 340 predicate places. [2024-06-28 04:09:56,534 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 551 transitions, 8940 flow [2024-06-28 04:09:56,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:09:56,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:09:56,535 INFO 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 04:09:56,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-28 04:09:56,535 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:09:56,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:09:56,535 INFO L85 PathProgramCache]: Analyzing trace with hash 671172217, now seen corresponding path program 3 times [2024-06-28 04:09:56,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:09:56,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753780770] [2024-06-28 04:09:56,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:09:56,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:09:56,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:09:58,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:09:58,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:09:58,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753780770] [2024-06-28 04:09:58,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753780770] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:09:58,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:09:58,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:09:58,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955216880] [2024-06-28 04:09:58,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:09:58,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:09:58,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:09:58,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:09:58,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:09:58,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:09:58,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 551 transitions, 8940 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:09:58,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:09:58,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:09:58,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:10:01,018 INFO L124 PetriNetUnfolderBase]: 3584/5618 cut-off events. [2024-06-28 04:10:01,018 INFO L125 PetriNetUnfolderBase]: For 670234/670244 co-relation queries the response was YES. [2024-06-28 04:10:01,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55433 conditions, 5618 events. 3584/5618 cut-off events. For 670234/670244 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 32391 event pairs, 665 based on Foata normal form. 5/5623 useless extension candidates. Maximal degree in co-relation 55252. Up to 5216 conditions per place. [2024-06-28 04:10:01,101 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 460 selfloop transitions, 108 changer transitions 0/572 dead transitions. [2024-06-28 04:10:01,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 572 transitions, 10230 flow [2024-06-28 04:10:01,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:10:01,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:10:01,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 139 transitions. [2024-06-28 04:10:01,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36772486772486773 [2024-06-28 04:10:01,103 INFO L175 Difference]: Start difference. First operand has 383 places, 551 transitions, 8940 flow. Second operand 9 states and 139 transitions. [2024-06-28 04:10:01,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 572 transitions, 10230 flow [2024-06-28 04:10:03,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 572 transitions, 9893 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-28 04:10:03,207 INFO L231 Difference]: Finished difference. Result has 383 places, 554 transitions, 8932 flow [2024-06-28 04:10:03,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8603, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=443, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8932, PETRI_PLACES=383, PETRI_TRANSITIONS=554} [2024-06-28 04:10:03,208 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 340 predicate places. [2024-06-28 04:10:03,208 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 554 transitions, 8932 flow [2024-06-28 04:10:03,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:10:03,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:10:03,208 INFO 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 04:10:03,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-28 04:10:03,208 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:10:03,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:10:03,209 INFO L85 PathProgramCache]: Analyzing trace with hash -678201003, now seen corresponding path program 4 times [2024-06-28 04:10:03,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:10:03,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720569734] [2024-06-28 04:10:03,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:10:03,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:10:03,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:10:06,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:10:06,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:10:06,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720569734] [2024-06-28 04:10:06,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720569734] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:10:06,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:10:06,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:10:06,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50350407] [2024-06-28 04:10:06,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:10:06,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:10:06,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:10:06,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:10:06,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:10:06,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:10:06,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 554 transitions, 8932 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:10:06,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:10:06,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:10:06,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:10:08,261 INFO L124 PetriNetUnfolderBase]: 3589/5621 cut-off events. [2024-06-28 04:10:08,262 INFO L125 PetriNetUnfolderBase]: For 683658/683664 co-relation queries the response was YES. [2024-06-28 04:10:08,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55644 conditions, 5621 events. 3589/5621 cut-off events. For 683658/683664 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 32347 event pairs, 673 based on Foata normal form. 1/5622 useless extension candidates. Maximal degree in co-relation 55462. Up to 5098 conditions per place. [2024-06-28 04:10:08,341 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 469 selfloop transitions, 108 changer transitions 0/581 dead transitions. [2024-06-28 04:10:08,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 581 transitions, 10264 flow [2024-06-28 04:10:08,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:10:08,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:10:08,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-28 04:10:08,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-28 04:10:08,343 INFO L175 Difference]: Start difference. First operand has 383 places, 554 transitions, 8932 flow. Second operand 8 states and 130 transitions. [2024-06-28 04:10:08,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 581 transitions, 10264 flow [2024-06-28 04:10:10,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 581 transitions, 9998 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-06-28 04:10:10,216 INFO L231 Difference]: Finished difference. Result has 383 places, 557 transitions, 8991 flow [2024-06-28 04:10:10,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8666, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=554, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=446, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8991, PETRI_PLACES=383, PETRI_TRANSITIONS=557} [2024-06-28 04:10:10,217 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 340 predicate places. [2024-06-28 04:10:10,217 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 557 transitions, 8991 flow [2024-06-28 04:10:10,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:10:10,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:10:10,217 INFO 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 04:10:10,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-28 04:10:10,218 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:10:10,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:10:10,218 INFO L85 PathProgramCache]: Analyzing trace with hash -683563383, now seen corresponding path program 5 times [2024-06-28 04:10:10,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:10:10,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554390177] [2024-06-28 04:10:10,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:10:10,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:10:10,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:10:12,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:10:12,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:10:12,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554390177] [2024-06-28 04:10:12,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554390177] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:10:12,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:10:12,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:10:12,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381794105] [2024-06-28 04:10:12,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:10:12,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:10:12,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:10:12,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:10:12,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:10:12,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:10:12,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 557 transitions, 8991 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:10:12,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:10:12,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:10:12,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:10:14,912 INFO L124 PetriNetUnfolderBase]: 3594/5634 cut-off events. [2024-06-28 04:10:14,912 INFO L125 PetriNetUnfolderBase]: For 685932/685942 co-relation queries the response was YES. [2024-06-28 04:10:14,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56065 conditions, 5634 events. 3594/5634 cut-off events. For 685932/685942 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 32558 event pairs, 665 based on Foata normal form. 5/5639 useless extension candidates. Maximal degree in co-relation 55883. Up to 5229 conditions per place. [2024-06-28 04:10:15,007 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 493 selfloop transitions, 88 changer transitions 0/585 dead transitions. [2024-06-28 04:10:15,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 585 transitions, 10348 flow [2024-06-28 04:10:15,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:10:15,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:10:15,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-28 04:10:15,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-28 04:10:15,009 INFO L175 Difference]: Start difference. First operand has 383 places, 557 transitions, 8991 flow. Second operand 8 states and 128 transitions. [2024-06-28 04:10:15,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 585 transitions, 10348 flow [2024-06-28 04:10:17,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 585 transitions, 10047 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-06-28 04:10:17,333 INFO L231 Difference]: Finished difference. Result has 385 places, 560 transitions, 8982 flow [2024-06-28 04:10:17,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8690, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8982, PETRI_PLACES=385, PETRI_TRANSITIONS=560} [2024-06-28 04:10:17,333 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 342 predicate places. [2024-06-28 04:10:17,334 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 560 transitions, 8982 flow [2024-06-28 04:10:17,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:10:17,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:10:17,334 INFO 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 04:10:17,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-28 04:10:17,334 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:10:17,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:10:17,335 INFO L85 PathProgramCache]: Analyzing trace with hash -683443227, now seen corresponding path program 4 times [2024-06-28 04:10:17,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:10:17,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313895685] [2024-06-28 04:10:17,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:10:17,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:10:17,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:10:19,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:10:19,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:10:19,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313895685] [2024-06-28 04:10:19,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313895685] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:10:19,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:10:19,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:10:19,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9104063] [2024-06-28 04:10:19,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:10:19,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:10:19,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:10:19,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:10:19,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:10:19,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:10:19,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 560 transitions, 8982 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:10:19,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:10:19,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:10:19,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:10:22,791 INFO L124 PetriNetUnfolderBase]: 3620/5674 cut-off events. [2024-06-28 04:10:22,791 INFO L125 PetriNetUnfolderBase]: For 716114/716124 co-relation queries the response was YES. [2024-06-28 04:10:22,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56992 conditions, 5674 events. 3620/5674 cut-off events. For 716114/716124 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 32791 event pairs, 662 based on Foata normal form. 6/5680 useless extension candidates. Maximal degree in co-relation 56809. Up to 5047 conditions per place. [2024-06-28 04:10:22,881 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 427 selfloop transitions, 164 changer transitions 0/595 dead transitions. [2024-06-28 04:10:22,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 595 transitions, 10689 flow [2024-06-28 04:10:22,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 04:10:22,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 04:10:22,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 169 transitions. [2024-06-28 04:10:22,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3658008658008658 [2024-06-28 04:10:22,882 INFO L175 Difference]: Start difference. First operand has 385 places, 560 transitions, 8982 flow. Second operand 11 states and 169 transitions. [2024-06-28 04:10:22,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 595 transitions, 10689 flow [2024-06-28 04:10:25,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 595 transitions, 10423 flow, removed 48 selfloop flow, removed 6 redundant places. [2024-06-28 04:10:25,317 INFO L231 Difference]: Finished difference. Result has 390 places, 566 transitions, 9262 flow [2024-06-28 04:10:25,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8716, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=560, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9262, PETRI_PLACES=390, PETRI_TRANSITIONS=566} [2024-06-28 04:10:25,318 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 347 predicate places. [2024-06-28 04:10:25,318 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 566 transitions, 9262 flow [2024-06-28 04:10:25,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:10:25,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:10:25,331 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:10:25,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-28 04:10:25,331 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:10:25,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:10:25,331 INFO L85 PathProgramCache]: Analyzing trace with hash -67109881, now seen corresponding path program 6 times [2024-06-28 04:10:25,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:10:25,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626721452] [2024-06-28 04:10:25,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:10:25,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:10:25,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:10:28,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:10:28,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:10:28,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626721452] [2024-06-28 04:10:28,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626721452] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:10:28,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:10:28,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:10:28,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145275968] [2024-06-28 04:10:28,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:10:28,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:10:28,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:10:28,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:10:28,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:10:28,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:10:28,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 566 transitions, 9262 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:10:28,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:10:28,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:10:28,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:10:30,374 INFO L124 PetriNetUnfolderBase]: 3625/5679 cut-off events. [2024-06-28 04:10:30,374 INFO L125 PetriNetUnfolderBase]: For 730092/730098 co-relation queries the response was YES. [2024-06-28 04:10:30,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57649 conditions, 5679 events. 3625/5679 cut-off events. For 730092/730098 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 32767 event pairs, 676 based on Foata normal form. 1/5680 useless extension candidates. Maximal degree in co-relation 57465. Up to 5121 conditions per place. [2024-06-28 04:10:30,459 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 466 selfloop transitions, 119 changer transitions 0/589 dead transitions. [2024-06-28 04:10:30,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 589 transitions, 10608 flow [2024-06-28 04:10:30,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:10:30,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:10:30,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-28 04:10:30,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-28 04:10:30,460 INFO L175 Difference]: Start difference. First operand has 390 places, 566 transitions, 9262 flow. Second operand 8 states and 128 transitions. [2024-06-28 04:10:30,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 589 transitions, 10608 flow [2024-06-28 04:10:33,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 589 transitions, 10192 flow, removed 61 selfloop flow, removed 8 redundant places. [2024-06-28 04:10:33,073 INFO L231 Difference]: Finished difference. Result has 390 places, 569 transitions, 9206 flow [2024-06-28 04:10:33,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8848, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9206, PETRI_PLACES=390, PETRI_TRANSITIONS=569} [2024-06-28 04:10:33,074 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 347 predicate places. [2024-06-28 04:10:33,074 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 569 transitions, 9206 flow [2024-06-28 04:10:33,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:10:33,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:10:33,074 INFO 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 04:10:33,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-28 04:10:33,074 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:10:33,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:10:33,075 INFO L85 PathProgramCache]: Analyzing trace with hash -51071391, now seen corresponding path program 1 times [2024-06-28 04:10:33,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:10:33,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128476441] [2024-06-28 04:10:33,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:10:33,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:10:33,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:10:35,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:10:35,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:10:35,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128476441] [2024-06-28 04:10:35,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128476441] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:10:35,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:10:35,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:10:35,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862769434] [2024-06-28 04:10:35,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:10:35,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:10:35,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:10:35,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:10:35,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:10:35,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:10:35,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 569 transitions, 9206 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:10:35,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:10:35,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:10:35,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:10:38,122 INFO L124 PetriNetUnfolderBase]: 3640/5729 cut-off events. [2024-06-28 04:10:38,123 INFO L125 PetriNetUnfolderBase]: For 746972/746986 co-relation queries the response was YES. [2024-06-28 04:10:38,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57841 conditions, 5729 events. 3640/5729 cut-off events. For 746972/746986 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 33529 event pairs, 1023 based on Foata normal form. 16/5745 useless extension candidates. Maximal degree in co-relation 57656. Up to 5429 conditions per place. [2024-06-28 04:10:38,203 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 543 selfloop transitions, 50 changer transitions 0/597 dead transitions. [2024-06-28 04:10:38,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 597 transitions, 10620 flow [2024-06-28 04:10:38,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:10:38,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:10:38,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-28 04:10:38,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-28 04:10:38,204 INFO L175 Difference]: Start difference. First operand has 390 places, 569 transitions, 9206 flow. Second operand 8 states and 126 transitions. [2024-06-28 04:10:38,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 597 transitions, 10620 flow [2024-06-28 04:10:40,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 597 transitions, 10279 flow, removed 51 selfloop flow, removed 6 redundant places. [2024-06-28 04:10:40,645 INFO L231 Difference]: Finished difference. Result has 393 places, 575 transitions, 9135 flow [2024-06-28 04:10:40,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8870, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=569, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=519, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9135, PETRI_PLACES=393, PETRI_TRANSITIONS=575} [2024-06-28 04:10:40,646 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 350 predicate places. [2024-06-28 04:10:40,646 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 575 transitions, 9135 flow [2024-06-28 04:10:40,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:10:40,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:10:40,646 INFO 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 04:10:40,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-28 04:10:40,646 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:10:40,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:10:40,647 INFO L85 PathProgramCache]: Analyzing trace with hash -683443413, now seen corresponding path program 7 times [2024-06-28 04:10:40,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:10:40,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5991130] [2024-06-28 04:10:40,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:10:40,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:10:40,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:10:43,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:10:43,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:10:43,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5991130] [2024-06-28 04:10:43,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5991130] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:10:43,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:10:43,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:10:43,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929872722] [2024-06-28 04:10:43,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:10:43,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:10:43,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:10:43,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:10:43,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:10:43,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:10:43,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 575 transitions, 9135 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:10:43,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:10:43,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:10:43,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:10:45,514 INFO L124 PetriNetUnfolderBase]: 3711/5814 cut-off events. [2024-06-28 04:10:45,514 INFO L125 PetriNetUnfolderBase]: For 798669/798679 co-relation queries the response was YES. [2024-06-28 04:10:45,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60168 conditions, 5814 events. 3711/5814 cut-off events. For 798669/798679 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 33688 event pairs, 585 based on Foata normal form. 5/5819 useless extension candidates. Maximal degree in co-relation 59981. Up to 4627 conditions per place. [2024-06-28 04:10:45,612 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 390 selfloop transitions, 227 changer transitions 0/621 dead transitions. [2024-06-28 04:10:45,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 621 transitions, 11151 flow [2024-06-28 04:10:45,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:10:45,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:10:45,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-28 04:10:45,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-28 04:10:45,614 INFO L175 Difference]: Start difference. First operand has 393 places, 575 transitions, 9135 flow. Second operand 9 states and 150 transitions. [2024-06-28 04:10:45,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 621 transitions, 11151 flow [2024-06-28 04:10:48,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 621 transitions, 10993 flow, removed 45 selfloop flow, removed 4 redundant places. [2024-06-28 04:10:48,094 INFO L231 Difference]: Finished difference. Result has 399 places, 590 transitions, 10058 flow [2024-06-28 04:10:48,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8977, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=213, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10058, PETRI_PLACES=399, PETRI_TRANSITIONS=590} [2024-06-28 04:10:48,094 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 356 predicate places. [2024-06-28 04:10:48,095 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 590 transitions, 10058 flow [2024-06-28 04:10:48,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:10:48,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:10:48,095 INFO 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 04:10:48,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-28 04:10:48,095 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:10:48,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:10:48,096 INFO L85 PathProgramCache]: Analyzing trace with hash -674188983, now seen corresponding path program 8 times [2024-06-28 04:10:48,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:10:48,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856558159] [2024-06-28 04:10:48,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:10:48,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:10:48,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:10:50,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:10:50,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:10:50,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856558159] [2024-06-28 04:10:50,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856558159] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:10:50,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:10:50,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:10:50,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612152330] [2024-06-28 04:10:50,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:10:50,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:10:50,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:10:50,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:10:50,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:10:50,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:10:50,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 590 transitions, 10058 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:10:50,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:10:50,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:10:50,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:10:52,934 INFO L124 PetriNetUnfolderBase]: 3716/5817 cut-off events. [2024-06-28 04:10:52,935 INFO L125 PetriNetUnfolderBase]: For 824517/824523 co-relation queries the response was YES. [2024-06-28 04:10:53,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62305 conditions, 5817 events. 3716/5817 cut-off events. For 824517/824523 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 33683 event pairs, 691 based on Foata normal form. 1/5818 useless extension candidates. Maximal degree in co-relation 62116. Up to 5321 conditions per place. [2024-06-28 04:10:53,033 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 484 selfloop transitions, 125 changer transitions 0/613 dead transitions. [2024-06-28 04:10:53,033 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 613 transitions, 11692 flow [2024-06-28 04:10:53,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:10:53,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:10:53,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 138 transitions. [2024-06-28 04:10:53,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36507936507936506 [2024-06-28 04:10:53,036 INFO L175 Difference]: Start difference. First operand has 399 places, 590 transitions, 10058 flow. Second operand 9 states and 138 transitions. [2024-06-28 04:10:53,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 613 transitions, 11692 flow [2024-06-28 04:10:56,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 613 transitions, 11470 flow, removed 46 selfloop flow, removed 5 redundant places. [2024-06-28 04:10:56,019 INFO L231 Difference]: Finished difference. Result has 404 places, 595 transitions, 10287 flow [2024-06-28 04:10:56,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9836, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=590, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=466, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10287, PETRI_PLACES=404, PETRI_TRANSITIONS=595} [2024-06-28 04:10:56,020 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 361 predicate places. [2024-06-28 04:10:56,020 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 595 transitions, 10287 flow [2024-06-28 04:10:56,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:10:56,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:10:56,021 INFO 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 04:10:56,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-28 04:10:56,021 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:10:56,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:10:56,021 INFO L85 PathProgramCache]: Analyzing trace with hash -63385045, now seen corresponding path program 5 times [2024-06-28 04:10:56,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:10:56,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360556670] [2024-06-28 04:10:56,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:10:56,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:10:56,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:10:58,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:10:58,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:10:58,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360556670] [2024-06-28 04:10:58,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360556670] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:10:58,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:10:58,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:10:58,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491513137] [2024-06-28 04:10:58,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:10:58,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:10:58,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:10:58,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:10:58,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:10:58,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:10:58,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 595 transitions, 10287 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:10:58,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:10:58,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:10:58,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:11:01,358 INFO L124 PetriNetUnfolderBase]: 3742/5857 cut-off events. [2024-06-28 04:11:01,359 INFO L125 PetriNetUnfolderBase]: For 856775/856781 co-relation queries the response was YES. [2024-06-28 04:11:01,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63330 conditions, 5857 events. 3742/5857 cut-off events. For 856775/856781 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 33932 event pairs, 677 based on Foata normal form. 2/5859 useless extension candidates. Maximal degree in co-relation 63138. Up to 5207 conditions per place. [2024-06-28 04:11:01,448 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 449 selfloop transitions, 172 changer transitions 0/625 dead transitions. [2024-06-28 04:11:01,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 625 transitions, 12191 flow [2024-06-28 04:11:01,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:11:01,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:11:01,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 158 transitions. [2024-06-28 04:11:01,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3761904761904762 [2024-06-28 04:11:01,450 INFO L175 Difference]: Start difference. First operand has 404 places, 595 transitions, 10287 flow. Second operand 10 states and 158 transitions. [2024-06-28 04:11:01,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 625 transitions, 12191 flow [2024-06-28 04:11:04,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 625 transitions, 11971 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-28 04:11:04,317 INFO L231 Difference]: Finished difference. Result has 409 places, 601 transitions, 10574 flow [2024-06-28 04:11:04,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10067, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10574, PETRI_PLACES=409, PETRI_TRANSITIONS=601} [2024-06-28 04:11:04,318 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 366 predicate places. [2024-06-28 04:11:04,318 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 601 transitions, 10574 flow [2024-06-28 04:11:04,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:11:04,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:11:04,318 INFO 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 04:11:04,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-28 04:11:04,319 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:11:04,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:11:04,319 INFO L85 PathProgramCache]: Analyzing trace with hash 933411829, now seen corresponding path program 6 times [2024-06-28 04:11:04,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:11:04,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167991040] [2024-06-28 04:11:04,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:11:04,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:11:04,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:11:06,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:11:06,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:11:06,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167991040] [2024-06-28 04:11:06,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167991040] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:11:06,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:11:06,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:11:06,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115115133] [2024-06-28 04:11:06,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:11:06,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:11:06,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:11:06,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:11:06,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:11:06,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:11:06,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 601 transitions, 10574 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:11:06,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:11:06,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:11:06,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:11:10,020 INFO L124 PetriNetUnfolderBase]: 3736/5849 cut-off events. [2024-06-28 04:11:10,021 INFO L125 PetriNetUnfolderBase]: For 862686/862692 co-relation queries the response was YES. [2024-06-28 04:11:10,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63588 conditions, 5849 events. 3736/5849 cut-off events. For 862686/862692 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 33903 event pairs, 676 based on Foata normal form. 2/5851 useless extension candidates. Maximal degree in co-relation 63394. Up to 5202 conditions per place. [2024-06-28 04:11:10,130 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 449 selfloop transitions, 174 changer transitions 0/627 dead transitions. [2024-06-28 04:11:10,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 627 transitions, 12148 flow [2024-06-28 04:11:10,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 04:11:10,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 04:11:10,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 180 transitions. [2024-06-28 04:11:10,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35714285714285715 [2024-06-28 04:11:10,131 INFO L175 Difference]: Start difference. First operand has 409 places, 601 transitions, 10574 flow. Second operand 12 states and 180 transitions. [2024-06-28 04:11:10,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 627 transitions, 12148 flow [2024-06-28 04:11:12,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 627 transitions, 11780 flow, removed 46 selfloop flow, removed 6 redundant places. [2024-06-28 04:11:12,714 INFO L231 Difference]: Finished difference. Result has 415 places, 601 transitions, 10560 flow [2024-06-28 04:11:12,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10206, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=601, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=10560, PETRI_PLACES=415, PETRI_TRANSITIONS=601} [2024-06-28 04:11:12,715 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 372 predicate places. [2024-06-28 04:11:12,715 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 601 transitions, 10560 flow [2024-06-28 04:11:12,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:11:12,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:11:12,715 INFO 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 04:11:12,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-28 04:11:12,715 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:11:12,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:11:12,716 INFO L85 PathProgramCache]: Analyzing trace with hash -63390811, now seen corresponding path program 9 times [2024-06-28 04:11:12,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:11:12,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691470439] [2024-06-28 04:11:12,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:11:12,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:11:12,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:11:14,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:11:14,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:11:14,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691470439] [2024-06-28 04:11:14,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691470439] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:11:14,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:11:14,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:11:14,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430747031] [2024-06-28 04:11:14,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:11:14,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:11:14,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:11:14,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:11:14,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:11:14,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:11:14,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 601 transitions, 10560 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:11:14,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:11:14,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:11:14,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:11:17,204 INFO L124 PetriNetUnfolderBase]: 3733/5845 cut-off events. [2024-06-28 04:11:17,204 INFO L125 PetriNetUnfolderBase]: For 866960/866966 co-relation queries the response was YES. [2024-06-28 04:11:17,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63503 conditions, 5845 events. 3733/5845 cut-off events. For 866960/866966 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 33900 event pairs, 693 based on Foata normal form. 1/5846 useless extension candidates. Maximal degree in co-relation 63308. Up to 5346 conditions per place. [2024-06-28 04:11:17,316 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 488 selfloop transitions, 125 changer transitions 0/617 dead transitions. [2024-06-28 04:11:17,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 617 transitions, 11836 flow [2024-06-28 04:11:17,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:11:17,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:11:17,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-28 04:11:17,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-28 04:11:17,318 INFO L175 Difference]: Start difference. First operand has 415 places, 601 transitions, 10560 flow. Second operand 8 states and 126 transitions. [2024-06-28 04:11:17,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 617 transitions, 11836 flow [2024-06-28 04:11:20,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 617 transitions, 11422 flow, removed 22 selfloop flow, removed 11 redundant places. [2024-06-28 04:11:20,213 INFO L231 Difference]: Finished difference. Result has 412 places, 601 transitions, 10403 flow [2024-06-28 04:11:20,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10146, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=601, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=476, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10403, PETRI_PLACES=412, PETRI_TRANSITIONS=601} [2024-06-28 04:11:20,214 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 369 predicate places. [2024-06-28 04:11:20,214 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 601 transitions, 10403 flow [2024-06-28 04:11:20,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:11:20,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:11:20,220 INFO 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 04:11:20,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-28 04:11:20,221 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:11:20,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:11:20,221 INFO L85 PathProgramCache]: Analyzing trace with hash -63390439, now seen corresponding path program 2 times [2024-06-28 04:11:20,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:11:20,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015203600] [2024-06-28 04:11:20,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:11:20,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:11:20,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:11:22,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:11:22,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:11:22,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015203600] [2024-06-28 04:11:22,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015203600] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:11:22,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:11:22,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:11:22,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974218449] [2024-06-28 04:11:22,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:11:22,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:11:22,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:11:22,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:11:22,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:11:22,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:11:22,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 601 transitions, 10403 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:11:22,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:11:22,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:11:22,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:11:25,616 INFO L124 PetriNetUnfolderBase]: 3827/6013 cut-off events. [2024-06-28 04:11:25,616 INFO L125 PetriNetUnfolderBase]: For 953789/953803 co-relation queries the response was YES. [2024-06-28 04:11:25,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66561 conditions, 6013 events. 3827/6013 cut-off events. For 953789/953803 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 35492 event pairs, 889 based on Foata normal form. 16/6029 useless extension candidates. Maximal degree in co-relation 66365. Up to 4987 conditions per place. [2024-06-28 04:11:25,713 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 421 selfloop transitions, 252 changer transitions 0/677 dead transitions. [2024-06-28 04:11:25,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 677 transitions, 13429 flow [2024-06-28 04:11:25,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 04:11:25,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 04:11:25,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 186 transitions. [2024-06-28 04:11:25,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36904761904761907 [2024-06-28 04:11:25,715 INFO L175 Difference]: Start difference. First operand has 412 places, 601 transitions, 10403 flow. Second operand 12 states and 186 transitions. [2024-06-28 04:11:25,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 677 transitions, 13429 flow [2024-06-28 04:11:28,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 677 transitions, 13120 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-28 04:11:28,940 INFO L231 Difference]: Finished difference. Result has 422 places, 645 transitions, 12047 flow [2024-06-28 04:11:28,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10121, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=601, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=212, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=12047, PETRI_PLACES=422, PETRI_TRANSITIONS=645} [2024-06-28 04:11:28,941 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 379 predicate places. [2024-06-28 04:11:28,941 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 645 transitions, 12047 flow [2024-06-28 04:11:28,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:11:28,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:11:28,941 INFO 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 04:11:28,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-28 04:11:28,941 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:11:28,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:11:28,942 INFO L85 PathProgramCache]: Analyzing trace with hash -63384859, now seen corresponding path program 3 times [2024-06-28 04:11:28,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:11:28,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996741225] [2024-06-28 04:11:28,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:11:28,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:11:28,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:11:31,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:11:31,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:11:31,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996741225] [2024-06-28 04:11:31,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996741225] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:11:31,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:11:31,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:11:31,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798395675] [2024-06-28 04:11:31,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:11:31,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:11:31,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:11:31,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:11:31,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:11:31,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:11:31,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 645 transitions, 12047 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:11:31,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:11:31,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:11:31,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:11:33,906 INFO L124 PetriNetUnfolderBase]: 3826/6010 cut-off events. [2024-06-28 04:11:33,907 INFO L125 PetriNetUnfolderBase]: For 977153/977167 co-relation queries the response was YES. [2024-06-28 04:11:33,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68533 conditions, 6010 events. 3826/6010 cut-off events. For 977153/977167 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 35368 event pairs, 1044 based on Foata normal form. 17/6027 useless extension candidates. Maximal degree in co-relation 68331. Up to 5622 conditions per place. [2024-06-28 04:11:34,016 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 544 selfloop transitions, 120 changer transitions 0/668 dead transitions. [2024-06-28 04:11:34,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 668 transitions, 13561 flow [2024-06-28 04:11:34,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:11:34,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:11:34,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 151 transitions. [2024-06-28 04:11:34,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3595238095238095 [2024-06-28 04:11:34,030 INFO L175 Difference]: Start difference. First operand has 422 places, 645 transitions, 12047 flow. Second operand 10 states and 151 transitions. [2024-06-28 04:11:34,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 668 transitions, 13561 flow [2024-06-28 04:11:37,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 668 transitions, 13136 flow, removed 178 selfloop flow, removed 5 redundant places. [2024-06-28 04:11:37,581 INFO L231 Difference]: Finished difference. Result has 427 places, 648 transitions, 12000 flow [2024-06-28 04:11:37,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11626, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=645, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=525, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12000, PETRI_PLACES=427, PETRI_TRANSITIONS=648} [2024-06-28 04:11:37,582 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 384 predicate places. [2024-06-28 04:11:37,582 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 648 transitions, 12000 flow [2024-06-28 04:11:37,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:11:37,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:11:37,582 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:11:37,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-28 04:11:37,582 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:11:37,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:11:37,583 INFO L85 PathProgramCache]: Analyzing trace with hash 151569257, now seen corresponding path program 4 times [2024-06-28 04:11:37,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:11:37,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450216648] [2024-06-28 04:11:37,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:11:37,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:11:37,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:11:40,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:11:40,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:11:40,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450216648] [2024-06-28 04:11:40,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450216648] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:11:40,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:11:40,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:11:40,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222928983] [2024-06-28 04:11:40,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:11:40,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:11:40,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:11:40,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:11:40,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:11:40,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:11:40,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 648 transitions, 12000 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:11:40,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:11:40,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:11:40,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:11:42,724 INFO L124 PetriNetUnfolderBase]: 3836/6026 cut-off events. [2024-06-28 04:11:42,725 INFO L125 PetriNetUnfolderBase]: For 971298/971352 co-relation queries the response was YES. [2024-06-28 04:11:42,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68156 conditions, 6026 events. 3836/6026 cut-off events. For 971298/971352 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 35496 event pairs, 1051 based on Foata normal form. 44/6070 useless extension candidates. Maximal degree in co-relation 67953. Up to 5685 conditions per place. [2024-06-28 04:11:42,838 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 578 selfloop transitions, 86 changer transitions 0/668 dead transitions. [2024-06-28 04:11:42,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 668 transitions, 13602 flow [2024-06-28 04:11:42,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:11:42,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:11:42,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-28 04:11:42,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3601190476190476 [2024-06-28 04:11:42,839 INFO L175 Difference]: Start difference. First operand has 427 places, 648 transitions, 12000 flow. Second operand 8 states and 121 transitions. [2024-06-28 04:11:42,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 668 transitions, 13602 flow [2024-06-28 04:11:46,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 668 transitions, 13294 flow, removed 47 selfloop flow, removed 8 redundant places. [2024-06-28 04:11:46,682 INFO L231 Difference]: Finished difference. Result has 427 places, 654 transitions, 12100 flow [2024-06-28 04:11:46,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11692, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=648, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=563, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12100, PETRI_PLACES=427, PETRI_TRANSITIONS=654} [2024-06-28 04:11:46,683 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 384 predicate places. [2024-06-28 04:11:46,683 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 654 transitions, 12100 flow [2024-06-28 04:11:46,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:11:46,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:11:46,684 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:11:46,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-28 04:11:46,699 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:11:46,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:11:46,699 INFO L85 PathProgramCache]: Analyzing trace with hash 1132713619, now seen corresponding path program 7 times [2024-06-28 04:11:46,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:11:46,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074024059] [2024-06-28 04:11:46,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:11:46,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:11:46,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:11:49,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:11:49,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:11:49,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074024059] [2024-06-28 04:11:49,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074024059] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:11:49,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:11:49,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:11:49,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564766770] [2024-06-28 04:11:49,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:11:49,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:11:49,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:11:49,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:11:49,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:11:49,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:11:49,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 654 transitions, 12100 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:11:49,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:11:49,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:11:49,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:11:52,467 INFO L124 PetriNetUnfolderBase]: 3846/6013 cut-off events. [2024-06-28 04:11:52,467 INFO L125 PetriNetUnfolderBase]: For 972132/972178 co-relation queries the response was YES. [2024-06-28 04:11:52,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68447 conditions, 6013 events. 3846/6013 cut-off events. For 972132/972178 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 35040 event pairs, 733 based on Foata normal form. 28/6041 useless extension candidates. Maximal degree in co-relation 68244. Up to 5354 conditions per place. [2024-06-28 04:11:52,578 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 486 selfloop transitions, 187 changer transitions 0/677 dead transitions. [2024-06-28 04:11:52,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 677 transitions, 13816 flow [2024-06-28 04:11:52,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 04:11:52,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 04:11:52,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 163 transitions. [2024-06-28 04:11:52,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3528138528138528 [2024-06-28 04:11:52,580 INFO L175 Difference]: Start difference. First operand has 427 places, 654 transitions, 12100 flow. Second operand 11 states and 163 transitions. [2024-06-28 04:11:52,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 677 transitions, 13816 flow [2024-06-28 04:11:55,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 677 transitions, 13568 flow, removed 65 selfloop flow, removed 4 redundant places. [2024-06-28 04:11:55,978 INFO L231 Difference]: Finished difference. Result has 434 places, 657 transitions, 12316 flow [2024-06-28 04:11:55,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11852, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=654, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=470, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12316, PETRI_PLACES=434, PETRI_TRANSITIONS=657} [2024-06-28 04:11:55,979 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 391 predicate places. [2024-06-28 04:11:55,979 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 657 transitions, 12316 flow [2024-06-28 04:11:55,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:11:55,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:11:55,980 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:11:55,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-28 04:11:55,980 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:11:55,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:11:55,980 INFO L85 PathProgramCache]: Analyzing trace with hash 155731593, now seen corresponding path program 8 times [2024-06-28 04:11:55,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:11:55,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197516180] [2024-06-28 04:11:55,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:11:55,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:11:55,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:11:58,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:11:58,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:11:58,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197516180] [2024-06-28 04:11:58,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197516180] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:11:58,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:11:58,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:11:58,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948046237] [2024-06-28 04:11:58,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:11:58,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:11:58,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:11:58,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:11:58,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:11:58,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:11:58,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 657 transitions, 12316 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:11:58,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:11:58,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:11:58,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:12:01,209 INFO L124 PetriNetUnfolderBase]: 3856/6029 cut-off events. [2024-06-28 04:12:01,210 INFO L125 PetriNetUnfolderBase]: For 990370/990416 co-relation queries the response was YES. [2024-06-28 04:12:01,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68990 conditions, 6029 events. 3856/6029 cut-off events. For 990370/990416 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 35164 event pairs, 735 based on Foata normal form. 28/6057 useless extension candidates. Maximal degree in co-relation 68786. Up to 5364 conditions per place. [2024-06-28 04:12:01,315 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 494 selfloop transitions, 178 changer transitions 0/676 dead transitions. [2024-06-28 04:12:01,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 676 transitions, 14022 flow [2024-06-28 04:12:01,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:12:01,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:12:01,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-28 04:12:01,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37797619047619047 [2024-06-28 04:12:01,316 INFO L175 Difference]: Start difference. First operand has 434 places, 657 transitions, 12316 flow. Second operand 8 states and 127 transitions. [2024-06-28 04:12:01,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 676 transitions, 14022 flow [2024-06-28 04:12:05,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 676 transitions, 13537 flow, removed 23 selfloop flow, removed 10 redundant places. [2024-06-28 04:12:05,096 INFO L231 Difference]: Finished difference. Result has 432 places, 660 transitions, 12284 flow [2024-06-28 04:12:05,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11840, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=657, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=482, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12284, PETRI_PLACES=432, PETRI_TRANSITIONS=660} [2024-06-28 04:12:05,097 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 389 predicate places. [2024-06-28 04:12:05,097 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 660 transitions, 12284 flow [2024-06-28 04:12:05,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:12:05,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:12:05,097 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:12:05,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-28 04:12:05,097 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:12:05,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:12:05,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1132713433, now seen corresponding path program 10 times [2024-06-28 04:12:05,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:12:05,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906552022] [2024-06-28 04:12:05,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:12:05,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:12:05,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:12:07,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:12:07,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:12:07,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906552022] [2024-06-28 04:12:07,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906552022] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:12:07,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:12:07,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:12:07,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140284597] [2024-06-28 04:12:07,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:12:07,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:12:07,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:12:07,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:12:07,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:12:07,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:12:07,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 660 transitions, 12284 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:12:07,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:12:07,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:12:07,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:12:10,224 INFO L124 PetriNetUnfolderBase]: 3874/6057 cut-off events. [2024-06-28 04:12:10,224 INFO L125 PetriNetUnfolderBase]: For 1016169/1016215 co-relation queries the response was YES. [2024-06-28 04:12:10,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69609 conditions, 6057 events. 3874/6057 cut-off events. For 1016169/1016215 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 35408 event pairs, 644 based on Foata normal form. 27/6084 useless extension candidates. Maximal degree in co-relation 69404. Up to 4831 conditions per place. [2024-06-28 04:12:10,323 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 422 selfloop transitions, 264 changer transitions 0/690 dead transitions. [2024-06-28 04:12:10,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 690 transitions, 14301 flow [2024-06-28 04:12:10,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:12:10,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:12:10,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-28 04:12:10,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3783068783068783 [2024-06-28 04:12:10,325 INFO L175 Difference]: Start difference. First operand has 432 places, 660 transitions, 12284 flow. Second operand 9 states and 143 transitions. [2024-06-28 04:12:10,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 690 transitions, 14301 flow [2024-06-28 04:12:14,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 690 transitions, 13984 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-28 04:12:14,361 INFO L231 Difference]: Finished difference. Result has 437 places, 670 transitions, 13077 flow [2024-06-28 04:12:14,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11967, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=660, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=254, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13077, PETRI_PLACES=437, PETRI_TRANSITIONS=670} [2024-06-28 04:12:14,361 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 394 predicate places. [2024-06-28 04:12:14,361 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 670 transitions, 13077 flow [2024-06-28 04:12:14,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:12:14,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:12:14,362 INFO 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 04:12:14,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-28 04:12:14,362 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:12:14,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:12:14,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1132724779, now seen corresponding path program 9 times [2024-06-28 04:12:14,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:12:14,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997880628] [2024-06-28 04:12:14,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:12:14,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:12:14,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:12:16,786 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 04:12:16,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:12:16,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997880628] [2024-06-28 04:12:16,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997880628] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:12:16,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:12:16,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:12:16,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977727036] [2024-06-28 04:12:16,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:12:16,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:12:16,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:12:16,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:12:16,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:12:16,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:12:16,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 670 transitions, 13077 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:12:16,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:12:16,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:12:16,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:12:20,050 INFO L124 PetriNetUnfolderBase]: 3868/6049 cut-off events. [2024-06-28 04:12:20,050 INFO L125 PetriNetUnfolderBase]: For 1034440/1034486 co-relation queries the response was YES. [2024-06-28 04:12:20,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70728 conditions, 6049 events. 3868/6049 cut-off events. For 1034440/1034486 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 35306 event pairs, 734 based on Foata normal form. 28/6077 useless extension candidates. Maximal degree in co-relation 70521. Up to 5385 conditions per place. [2024-06-28 04:12:20,151 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 498 selfloop transitions, 186 changer transitions 0/688 dead transitions. [2024-06-28 04:12:20,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 688 transitions, 14523 flow [2024-06-28 04:12:20,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:12:20,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:12:20,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 153 transitions. [2024-06-28 04:12:20,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36428571428571427 [2024-06-28 04:12:20,152 INFO L175 Difference]: Start difference. First operand has 437 places, 670 transitions, 13077 flow. Second operand 10 states and 153 transitions. [2024-06-28 04:12:20,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 688 transitions, 14523 flow [2024-06-28 04:12:23,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 688 transitions, 14251 flow, removed 65 selfloop flow, removed 5 redundant places. [2024-06-28 04:12:23,894 INFO L231 Difference]: Finished difference. Result has 442 places, 670 transitions, 13186 flow [2024-06-28 04:12:23,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12805, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=670, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=484, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13186, PETRI_PLACES=442, PETRI_TRANSITIONS=670} [2024-06-28 04:12:23,895 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 399 predicate places. [2024-06-28 04:12:23,895 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 670 transitions, 13186 flow [2024-06-28 04:12:23,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:12:23,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:12:23,896 INFO 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 04:12:23,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-28 04:12:23,896 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:12:23,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:12:23,896 INFO L85 PathProgramCache]: Analyzing trace with hash 148380129, now seen corresponding path program 5 times [2024-06-28 04:12:23,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:12:23,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195849475] [2024-06-28 04:12:23,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:12:23,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:12:23,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:12:26,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:12:26,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:12:26,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195849475] [2024-06-28 04:12:26,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195849475] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:12:26,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:12:26,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:12:26,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116006384] [2024-06-28 04:12:26,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:12:26,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:12:26,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:12:26,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:12:26,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:12:26,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:12:26,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 670 transitions, 13186 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:12:26,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:12:26,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:12:26,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:12:28,909 INFO L124 PetriNetUnfolderBase]: 3878/6090 cut-off events. [2024-06-28 04:12:28,910 INFO L125 PetriNetUnfolderBase]: For 1055648/1055702 co-relation queries the response was YES. [2024-06-28 04:12:28,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71490 conditions, 6090 events. 3878/6090 cut-off events. For 1055648/1055702 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 35963 event pairs, 1058 based on Foata normal form. 44/6134 useless extension candidates. Maximal degree in co-relation 71281. Up to 5743 conditions per place. [2024-06-28 04:12:29,019 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 599 selfloop transitions, 89 changer transitions 0/692 dead transitions. [2024-06-28 04:12:29,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 692 transitions, 14870 flow [2024-06-28 04:12:29,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:12:29,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:12:29,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 145 transitions. [2024-06-28 04:12:29,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34523809523809523 [2024-06-28 04:12:29,021 INFO L175 Difference]: Start difference. First operand has 442 places, 670 transitions, 13186 flow. Second operand 10 states and 145 transitions. [2024-06-28 04:12:29,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 692 transitions, 14870 flow [2024-06-28 04:12:33,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 692 transitions, 14413 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-28 04:12:33,085 INFO L231 Difference]: Finished difference. Result has 442 places, 675 transitions, 13152 flow [2024-06-28 04:12:33,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12729, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=670, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=581, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13152, PETRI_PLACES=442, PETRI_TRANSITIONS=675} [2024-06-28 04:12:33,086 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 399 predicate places. [2024-06-28 04:12:33,086 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 675 transitions, 13152 flow [2024-06-28 04:12:33,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:12:33,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:12:33,087 INFO 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 04:12:33,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-28 04:12:33,087 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:12:33,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:12:33,088 INFO L85 PathProgramCache]: Analyzing trace with hash 148374177, now seen corresponding path program 11 times [2024-06-28 04:12:33,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:12:33,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306421622] [2024-06-28 04:12:33,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:12:33,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:12:33,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:12:35,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:12:35,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:12:35,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306421622] [2024-06-28 04:12:35,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306421622] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:12:35,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:12:35,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:12:35,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052569169] [2024-06-28 04:12:35,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:12:35,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:12:35,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:12:35,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:12:35,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:12:35,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:12:35,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 675 transitions, 13152 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:12:35,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:12:35,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:12:35,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:12:37,713 INFO L124 PetriNetUnfolderBase]: 3875/6055 cut-off events. [2024-06-28 04:12:37,713 INFO L125 PetriNetUnfolderBase]: For 1057965/1058011 co-relation queries the response was YES. [2024-06-28 04:12:37,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71431 conditions, 6055 events. 3875/6055 cut-off events. For 1057965/1058011 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 35274 event pairs, 740 based on Foata normal form. 27/6082 useless extension candidates. Maximal degree in co-relation 71221. Up to 5551 conditions per place. [2024-06-28 04:12:37,823 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 564 selfloop transitions, 121 changer transitions 0/689 dead transitions. [2024-06-28 04:12:37,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 689 transitions, 14654 flow [2024-06-28 04:12:37,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:12:37,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:12:37,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 122 transitions. [2024-06-28 04:12:37,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3630952380952381 [2024-06-28 04:12:37,825 INFO L175 Difference]: Start difference. First operand has 442 places, 675 transitions, 13152 flow. Second operand 8 states and 122 transitions. [2024-06-28 04:12:37,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 689 transitions, 14654 flow [2024-06-28 04:12:41,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 689 transitions, 14318 flow, removed 70 selfloop flow, removed 8 redundant places. [2024-06-28 04:12:41,383 INFO L231 Difference]: Finished difference. Result has 442 places, 677 transitions, 13167 flow [2024-06-28 04:12:41,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12816, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=675, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=554, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13167, PETRI_PLACES=442, PETRI_TRANSITIONS=677} [2024-06-28 04:12:41,383 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 399 predicate places. [2024-06-28 04:12:41,383 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 677 transitions, 13167 flow [2024-06-28 04:12:41,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:12:41,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:12:41,384 INFO 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 04:12:41,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-28 04:12:41,384 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:12:41,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:12:41,384 INFO L85 PathProgramCache]: Analyzing trace with hash -530292501, now seen corresponding path program 6 times [2024-06-28 04:12:41,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:12:41,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699466119] [2024-06-28 04:12:41,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:12:41,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:12:41,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:12:43,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:12:43,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:12:43,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699466119] [2024-06-28 04:12:43,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699466119] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:12:43,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:12:43,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:12:43,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141252335] [2024-06-28 04:12:43,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:12:43,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:12:43,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:12:43,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:12:43,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:12:43,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:12:43,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 677 transitions, 13167 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:12:43,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:12:43,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:12:43,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:12:46,744 INFO L124 PetriNetUnfolderBase]: 3885/6100 cut-off events. [2024-06-28 04:12:46,745 INFO L125 PetriNetUnfolderBase]: For 1085033/1085087 co-relation queries the response was YES. [2024-06-28 04:12:46,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71937 conditions, 6100 events. 3885/6100 cut-off events. For 1085033/1085087 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 36012 event pairs, 1058 based on Foata normal form. 44/6144 useless extension candidates. Maximal degree in co-relation 71726. Up to 5668 conditions per place. [2024-06-28 04:12:46,852 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 551 selfloop transitions, 149 changer transitions 0/704 dead transitions. [2024-06-28 04:12:46,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 704 transitions, 15218 flow [2024-06-28 04:12:46,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:12:46,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:12:46,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 150 transitions. [2024-06-28 04:12:46,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35714285714285715 [2024-06-28 04:12:46,854 INFO L175 Difference]: Start difference. First operand has 442 places, 677 transitions, 13167 flow. Second operand 10 states and 150 transitions. [2024-06-28 04:12:46,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 704 transitions, 15218 flow [2024-06-28 04:12:50,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 704 transitions, 14875 flow, removed 52 selfloop flow, removed 6 redundant places. [2024-06-28 04:12:50,609 INFO L231 Difference]: Finished difference. Result has 447 places, 685 transitions, 13528 flow [2024-06-28 04:12:50,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12826, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=677, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=528, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13528, PETRI_PLACES=447, PETRI_TRANSITIONS=685} [2024-06-28 04:12:50,610 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 404 predicate places. [2024-06-28 04:12:50,610 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 685 transitions, 13528 flow [2024-06-28 04:12:50,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:12:50,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:12:50,611 INFO 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 04:12:50,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-28 04:12:50,612 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:12:50,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:12:50,613 INFO L85 PathProgramCache]: Analyzing trace with hash -67467811, now seen corresponding path program 7 times [2024-06-28 04:12:50,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:12:50,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41152256] [2024-06-28 04:12:50,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:12:50,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:12:50,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:12:53,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:12:53,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:12:53,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41152256] [2024-06-28 04:12:53,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41152256] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:12:53,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:12:53,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:12:53,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267148189] [2024-06-28 04:12:53,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:12:53,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:12:53,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:12:53,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:12:53,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:12:53,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:12:53,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 685 transitions, 13528 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:12:53,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:12:53,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:12:53,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:12:55,932 INFO L124 PetriNetUnfolderBase]: 3900/6117 cut-off events. [2024-06-28 04:12:55,932 INFO L125 PetriNetUnfolderBase]: For 1103731/1103745 co-relation queries the response was YES. [2024-06-28 04:12:56,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72715 conditions, 6117 events. 3900/6117 cut-off events. For 1103731/1103745 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 36032 event pairs, 1042 based on Foata normal form. 16/6133 useless extension candidates. Maximal degree in co-relation 72502. Up to 5797 conditions per place. [2024-06-28 04:12:56,043 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 667 selfloop transitions, 47 changer transitions 0/718 dead transitions. [2024-06-28 04:12:56,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 718 transitions, 15233 flow [2024-06-28 04:12:56,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:12:56,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:12:56,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 139 transitions. [2024-06-28 04:12:56,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36772486772486773 [2024-06-28 04:12:56,045 INFO L175 Difference]: Start difference. First operand has 447 places, 685 transitions, 13528 flow. Second operand 9 states and 139 transitions. [2024-06-28 04:12:56,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 718 transitions, 15233 flow [2024-06-28 04:13:00,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 718 transitions, 14855 flow, removed 70 selfloop flow, removed 7 redundant places. [2024-06-28 04:13:00,339 INFO L231 Difference]: Finished difference. Result has 450 places, 691 transitions, 13438 flow [2024-06-28 04:13:00,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13150, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=685, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=638, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13438, PETRI_PLACES=450, PETRI_TRANSITIONS=691} [2024-06-28 04:13:00,340 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 407 predicate places. [2024-06-28 04:13:00,340 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 691 transitions, 13438 flow [2024-06-28 04:13:00,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:13:00,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:13:00,341 INFO 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 04:13:00,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-28 04:13:00,341 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:13:00,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:13:00,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1655680487, now seen corresponding path program 8 times [2024-06-28 04:13:00,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:13:00,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017158789] [2024-06-28 04:13:00,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:13:00,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:13:00,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:13:03,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:13:03,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:13:03,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017158789] [2024-06-28 04:13:03,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017158789] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:13:03,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:13:03,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:13:03,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804981613] [2024-06-28 04:13:03,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:13:03,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:13:03,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:13:03,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:13:03,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:13:03,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:13:03,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 691 transitions, 13438 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:13:03,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:13:03,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:13:03,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:13:05,624 INFO L124 PetriNetUnfolderBase]: 3926/6153 cut-off events. [2024-06-28 04:13:05,625 INFO L125 PetriNetUnfolderBase]: For 1137877/1137891 co-relation queries the response was YES. [2024-06-28 04:13:05,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73779 conditions, 6153 events. 3926/6153 cut-off events. For 1137877/1137891 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 36260 event pairs, 1039 based on Foata normal form. 16/6169 useless extension candidates. Maximal degree in co-relation 73564. Up to 5793 conditions per place. [2024-06-28 04:13:05,742 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 652 selfloop transitions, 66 changer transitions 0/722 dead transitions. [2024-06-28 04:13:05,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 722 transitions, 15495 flow [2024-06-28 04:13:05,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:13:05,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:13:05,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 139 transitions. [2024-06-28 04:13:05,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36772486772486773 [2024-06-28 04:13:05,743 INFO L175 Difference]: Start difference. First operand has 450 places, 691 transitions, 13438 flow. Second operand 9 states and 139 transitions. [2024-06-28 04:13:05,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 722 transitions, 15495 flow [2024-06-28 04:13:09,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 722 transitions, 15283 flow, removed 64 selfloop flow, removed 5 redundant places. [2024-06-28 04:13:09,849 INFO L231 Difference]: Finished difference. Result has 454 places, 697 transitions, 13670 flow [2024-06-28 04:13:09,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13226, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=691, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=628, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13670, PETRI_PLACES=454, PETRI_TRANSITIONS=697} [2024-06-28 04:13:09,868 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 411 predicate places. [2024-06-28 04:13:09,869 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 697 transitions, 13670 flow [2024-06-28 04:13:09,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:13:09,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:13:09,869 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:13:09,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-28 04:13:09,869 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:13:09,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:13:09,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1656096197, now seen corresponding path program 9 times [2024-06-28 04:13:09,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:13:09,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848336779] [2024-06-28 04:13:09,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:13:09,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:13:09,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:13:12,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:13:12,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:13:12,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848336779] [2024-06-28 04:13:12,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848336779] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:13:12,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:13:12,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:13:12,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716186802] [2024-06-28 04:13:12,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:13:12,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:13:12,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:13:12,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:13:12,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:13:13,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:13:13,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 697 transitions, 13670 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:13:13,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:13:13,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:13:13,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:13:15,675 INFO L124 PetriNetUnfolderBase]: 3920/6145 cut-off events. [2024-06-28 04:13:15,676 INFO L125 PetriNetUnfolderBase]: For 1145307/1145321 co-relation queries the response was YES. [2024-06-28 04:13:15,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73664 conditions, 6145 events. 3920/6145 cut-off events. For 1145307/1145321 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 36202 event pairs, 1042 based on Foata normal form. 16/6161 useless extension candidates. Maximal degree in co-relation 73448. Up to 5814 conditions per place. [2024-06-28 04:13:15,786 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 661 selfloop transitions, 55 changer transitions 0/720 dead transitions. [2024-06-28 04:13:15,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 720 transitions, 15191 flow [2024-06-28 04:13:15,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:13:15,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:13:15,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 136 transitions. [2024-06-28 04:13:15,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35978835978835977 [2024-06-28 04:13:15,788 INFO L175 Difference]: Start difference. First operand has 454 places, 697 transitions, 13670 flow. Second operand 9 states and 136 transitions. [2024-06-28 04:13:15,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 720 transitions, 15191 flow [2024-06-28 04:13:20,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 720 transitions, 14897 flow, removed 114 selfloop flow, removed 5 redundant places. [2024-06-28 04:13:20,096 INFO L231 Difference]: Finished difference. Result has 458 places, 697 transitions, 13492 flow [2024-06-28 04:13:20,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13376, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=697, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=642, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13492, PETRI_PLACES=458, PETRI_TRANSITIONS=697} [2024-06-28 04:13:20,097 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 415 predicate places. [2024-06-28 04:13:20,097 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 697 transitions, 13492 flow [2024-06-28 04:13:20,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:13:20,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:13:20,097 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:13:20,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-28 04:13:20,098 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:13:20,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:13:20,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1918345783, now seen corresponding path program 10 times [2024-06-28 04:13:20,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:13:20,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241286284] [2024-06-28 04:13:20,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:13:20,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:13:20,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:13:22,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:13:22,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:13:22,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241286284] [2024-06-28 04:13:22,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241286284] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:13:22,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:13:22,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:13:22,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533962340] [2024-06-28 04:13:22,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:13:22,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:13:22,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:13:22,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:13:22,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:13:22,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:13:22,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 697 transitions, 13492 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:13:22,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:13:22,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:13:22,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:13:25,622 INFO L124 PetriNetUnfolderBase]: 3988/6248 cut-off events. [2024-06-28 04:13:25,622 INFO L125 PetriNetUnfolderBase]: For 1220268/1220282 co-relation queries the response was YES. [2024-06-28 04:13:25,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76262 conditions, 6248 events. 3988/6248 cut-off events. For 1220268/1220282 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 36949 event pairs, 897 based on Foata normal form. 17/6265 useless extension candidates. Maximal degree in co-relation 76044. Up to 5057 conditions per place. [2024-06-28 04:13:25,738 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 463 selfloop transitions, 300 changer transitions 0/767 dead transitions. [2024-06-28 04:13:25,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 767 transitions, 17140 flow [2024-06-28 04:13:25,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:13:25,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:13:25,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 166 transitions. [2024-06-28 04:13:25,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3952380952380952 [2024-06-28 04:13:25,739 INFO L175 Difference]: Start difference. First operand has 458 places, 697 transitions, 13492 flow. Second operand 10 states and 166 transitions. [2024-06-28 04:13:25,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 767 transitions, 17140 flow [2024-06-28 04:13:30,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 767 transitions, 16966 flow, removed 14 selfloop flow, removed 10 redundant places. [2024-06-28 04:13:30,976 INFO L231 Difference]: Finished difference. Result has 462 places, 738 transitions, 15617 flow [2024-06-28 04:13:30,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13318, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=697, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=263, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=15617, PETRI_PLACES=462, PETRI_TRANSITIONS=738} [2024-06-28 04:13:30,977 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 419 predicate places. [2024-06-28 04:13:30,977 INFO L495 AbstractCegarLoop]: Abstraction has has 462 places, 738 transitions, 15617 flow [2024-06-28 04:13:30,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:13:30,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:13:30,977 INFO 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 04:13:30,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-28 04:13:30,978 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:13:30,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:13:30,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1917930073, now seen corresponding path program 11 times [2024-06-28 04:13:30,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:13:30,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866969753] [2024-06-28 04:13:30,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:13:30,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:13:30,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:13:33,552 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 04:13:33,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:13:33,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866969753] [2024-06-28 04:13:33,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866969753] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:13:33,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:13:33,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:13:33,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709009286] [2024-06-28 04:13:33,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:13:33,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:13:33,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:13:33,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:13:33,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:13:33,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:13:33,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 462 places, 738 transitions, 15617 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:13:33,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:13:33,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:13:33,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:13:36,363 INFO L124 PetriNetUnfolderBase]: 3982/6239 cut-off events. [2024-06-28 04:13:36,364 INFO L125 PetriNetUnfolderBase]: For 1237141/1237155 co-relation queries the response was YES. [2024-06-28 04:13:36,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78459 conditions, 6239 events. 3982/6239 cut-off events. For 1237141/1237155 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 36767 event pairs, 1043 based on Foata normal form. 16/6255 useless extension candidates. Maximal degree in co-relation 78238. Up to 5921 conditions per place. [2024-06-28 04:13:36,484 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 690 selfloop transitions, 63 changer transitions 0/757 dead transitions. [2024-06-28 04:13:36,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 757 transitions, 17200 flow [2024-06-28 04:13:36,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:13:36,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:13:36,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 134 transitions. [2024-06-28 04:13:36,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3544973544973545 [2024-06-28 04:13:36,486 INFO L175 Difference]: Start difference. First operand has 462 places, 738 transitions, 15617 flow. Second operand 9 states and 134 transitions. [2024-06-28 04:13:36,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 757 transitions, 17200 flow [2024-06-28 04:13:41,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 469 places, 757 transitions, 16718 flow, removed 240 selfloop flow, removed 1 redundant places. [2024-06-28 04:13:41,909 INFO L231 Difference]: Finished difference. Result has 470 places, 738 transitions, 15269 flow [2024-06-28 04:13:41,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=15135, PETRI_DIFFERENCE_MINUEND_PLACES=461, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=738, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=675, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15269, PETRI_PLACES=470, PETRI_TRANSITIONS=738} [2024-06-28 04:13:41,910 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 427 predicate places. [2024-06-28 04:13:41,910 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 738 transitions, 15269 flow [2024-06-28 04:13:41,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:13:41,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:13:41,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:13:41,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-28 04:13:41,911 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:13:41,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:13:41,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1923708163, now seen corresponding path program 12 times [2024-06-28 04:13:41,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:13:41,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650119772] [2024-06-28 04:13:41,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:13:41,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:13:41,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:13:44,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:13:44,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:13:44,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650119772] [2024-06-28 04:13:44,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650119772] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:13:44,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:13:44,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:13:44,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210421982] [2024-06-28 04:13:44,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:13:44,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:13:44,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:13:44,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:13:44,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:13:44,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:13:44,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 738 transitions, 15269 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:13:44,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:13:44,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:13:44,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:13:46,963 INFO L124 PetriNetUnfolderBase]: 3981/6235 cut-off events. [2024-06-28 04:13:46,964 INFO L125 PetriNetUnfolderBase]: For 1244715/1244729 co-relation queries the response was YES. [2024-06-28 04:13:47,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78069 conditions, 6235 events. 3981/6235 cut-off events. For 1244715/1244729 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 36774 event pairs, 1045 based on Foata normal form. 17/6252 useless extension candidates. Maximal degree in co-relation 77845. Up to 5855 conditions per place. [2024-06-28 04:13:47,076 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 651 selfloop transitions, 105 changer transitions 0/760 dead transitions. [2024-06-28 04:13:47,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 760 transitions, 17220 flow [2024-06-28 04:13:47,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:13:47,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:13:47,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 139 transitions. [2024-06-28 04:13:47,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36772486772486773 [2024-06-28 04:13:47,078 INFO L175 Difference]: Start difference. First operand has 470 places, 738 transitions, 15269 flow. Second operand 9 states and 139 transitions. [2024-06-28 04:13:47,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 760 transitions, 17220 flow [2024-06-28 04:13:52,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 471 places, 760 transitions, 17041 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-28 04:13:52,072 INFO L231 Difference]: Finished difference. Result has 472 places, 741 transitions, 15458 flow [2024-06-28 04:13:52,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=15090, PETRI_DIFFERENCE_MINUEND_PLACES=463, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=738, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=636, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15458, PETRI_PLACES=472, PETRI_TRANSITIONS=741} [2024-06-28 04:13:52,089 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 429 predicate places. [2024-06-28 04:13:52,089 INFO L495 AbstractCegarLoop]: Abstraction has has 472 places, 741 transitions, 15458 flow [2024-06-28 04:13:52,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:13:52,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:13:52,089 INFO 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 04:13:52,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-28 04:13:52,089 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:13:52,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:13:52,090 INFO L85 PathProgramCache]: Analyzing trace with hash -932657643, now seen corresponding path program 13 times [2024-06-28 04:13:52,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:13:52,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516883968] [2024-06-28 04:13:52,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:13:52,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:13:52,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:13:54,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:13:54,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:13:54,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516883968] [2024-06-28 04:13:54,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516883968] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:13:54,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:13:54,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:13:54,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595504103] [2024-06-28 04:13:54,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:13:54,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:13:54,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:13:54,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:13:54,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:13:54,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:13:54,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 472 places, 741 transitions, 15458 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:13:54,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:13:54,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:13:54,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:13:57,694 INFO L124 PetriNetUnfolderBase]: 4030/6316 cut-off events. [2024-06-28 04:13:57,695 INFO L125 PetriNetUnfolderBase]: For 1304758/1304772 co-relation queries the response was YES. [2024-06-28 04:13:57,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80273 conditions, 6316 events. 4030/6316 cut-off events. For 1304758/1304772 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 37400 event pairs, 900 based on Foata normal form. 17/6333 useless extension candidates. Maximal degree in co-relation 80048. Up to 5173 conditions per place. [2024-06-28 04:13:57,814 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 480 selfloop transitions, 299 changer transitions 0/783 dead transitions. [2024-06-28 04:13:57,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 783 transitions, 18052 flow [2024-06-28 04:13:57,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:13:57,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:13:57,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 163 transitions. [2024-06-28 04:13:57,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3880952380952381 [2024-06-28 04:13:57,815 INFO L175 Difference]: Start difference. First operand has 472 places, 741 transitions, 15458 flow. Second operand 10 states and 163 transitions. [2024-06-28 04:13:57,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 783 transitions, 18052 flow [2024-06-28 04:14:03,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 783 transitions, 17521 flow, removed 175 selfloop flow, removed 7 redundant places. [2024-06-28 04:14:03,255 INFO L231 Difference]: Finished difference. Result has 476 places, 757 transitions, 16497 flow [2024-06-28 04:14:03,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=14929, PETRI_DIFFERENCE_MINUEND_PLACES=465, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=741, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=283, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=16497, PETRI_PLACES=476, PETRI_TRANSITIONS=757} [2024-06-28 04:14:03,256 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 433 predicate places. [2024-06-28 04:14:03,256 INFO L495 AbstractCegarLoop]: Abstraction has has 476 places, 757 transitions, 16497 flow [2024-06-28 04:14:03,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:14:03,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:14:03,256 INFO 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 04:14:03,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-28 04:14:03,256 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:14:03,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:14:03,257 INFO L85 PathProgramCache]: Analyzing trace with hash -932657829, now seen corresponding path program 10 times [2024-06-28 04:14:03,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:14:03,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573527583] [2024-06-28 04:14:03,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:14:03,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:14:03,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:14:05,620 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 04:14:05,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:14:05,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573527583] [2024-06-28 04:14:05,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573527583] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:14:05,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:14:05,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:14:05,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943563731] [2024-06-28 04:14:05,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:14:05,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:14:05,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:14:05,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:14:05,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:14:05,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:14:05,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 757 transitions, 16497 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:14:05,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:14:05,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:14:05,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:14:08,719 INFO L124 PetriNetUnfolderBase]: 4040/6302 cut-off events. [2024-06-28 04:14:08,719 INFO L125 PetriNetUnfolderBase]: For 1314069/1314075 co-relation queries the response was YES. [2024-06-28 04:14:08,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81898 conditions, 6302 events. 4040/6302 cut-off events. For 1314069/1314075 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 36815 event pairs, 696 based on Foata normal form. 2/6304 useless extension candidates. Maximal degree in co-relation 81672. Up to 5549 conditions per place. [2024-06-28 04:14:08,836 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 589 selfloop transitions, 192 changer transitions 0/785 dead transitions. [2024-06-28 04:14:08,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 484 places, 785 transitions, 18679 flow [2024-06-28 04:14:08,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:14:08,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:14:08,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-28 04:14:08,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835978835978836 [2024-06-28 04:14:08,838 INFO L175 Difference]: Start difference. First operand has 476 places, 757 transitions, 16497 flow. Second operand 9 states and 145 transitions. [2024-06-28 04:14:08,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 484 places, 785 transitions, 18679 flow [2024-06-28 04:14:14,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 785 transitions, 18450 flow, removed 46 selfloop flow, removed 5 redundant places. [2024-06-28 04:14:14,377 INFO L231 Difference]: Finished difference. Result has 480 places, 763 transitions, 16953 flow [2024-06-28 04:14:14,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=16268, PETRI_DIFFERENCE_MINUEND_PLACES=471, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=757, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=568, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=16953, PETRI_PLACES=480, PETRI_TRANSITIONS=763} [2024-06-28 04:14:14,378 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 437 predicate places. [2024-06-28 04:14:14,378 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 763 transitions, 16953 flow [2024-06-28 04:14:14,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:14:14,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:14:14,379 INFO 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 04:14:14,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-28 04:14:14,379 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:14:14,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:14:14,379 INFO L85 PathProgramCache]: Analyzing trace with hash 2034186819, now seen corresponding path program 14 times [2024-06-28 04:14:14,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:14:14,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466129554] [2024-06-28 04:14:14,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:14:14,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:14:14,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:14:16,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:14:16,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:14:16,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466129554] [2024-06-28 04:14:16,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466129554] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:14:16,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:14:16,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:14:16,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518191672] [2024-06-28 04:14:16,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:14:16,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:14:16,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:14:16,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:14:16,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:14:16,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:14:16,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 763 transitions, 16953 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:14:16,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:14:16,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:14:16,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:14:19,780 INFO L124 PetriNetUnfolderBase]: 4050/6355 cut-off events. [2024-06-28 04:14:19,780 INFO L125 PetriNetUnfolderBase]: For 1349158/1349204 co-relation queries the response was YES. [2024-06-28 04:14:19,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83133 conditions, 6355 events. 4050/6355 cut-off events. For 1349158/1349204 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 37707 event pairs, 1054 based on Foata normal form. 38/6393 useless extension candidates. Maximal degree in co-relation 82905. Up to 6018 conditions per place. [2024-06-28 04:14:19,901 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 716 selfloop transitions, 63 changer transitions 0/783 dead transitions. [2024-06-28 04:14:19,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 488 places, 783 transitions, 18854 flow [2024-06-28 04:14:19,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:14:19,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:14:19,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 130 transitions. [2024-06-28 04:14:19,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3439153439153439 [2024-06-28 04:14:19,902 INFO L175 Difference]: Start difference. First operand has 480 places, 763 transitions, 16953 flow. Second operand 9 states and 130 transitions. [2024-06-28 04:14:19,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 488 places, 783 transitions, 18854 flow [2024-06-28 04:14:26,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 481 places, 783 transitions, 18601 flow, removed 55 selfloop flow, removed 7 redundant places. [2024-06-28 04:14:26,523 INFO L231 Difference]: Finished difference. Result has 482 places, 768 transitions, 17124 flow [2024-06-28 04:14:26,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=16702, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=763, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=700, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=17124, PETRI_PLACES=482, PETRI_TRANSITIONS=768} [2024-06-28 04:14:26,524 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 439 predicate places. [2024-06-28 04:14:26,524 INFO L495 AbstractCegarLoop]: Abstraction has has 482 places, 768 transitions, 17124 flow [2024-06-28 04:14:26,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:14:26,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:14:26,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:14:26,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-28 04:14:26,524 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:14:26,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:14:26,525 INFO L85 PathProgramCache]: Analyzing trace with hash -1190985243, now seen corresponding path program 15 times [2024-06-28 04:14:26,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:14:26,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933322820] [2024-06-28 04:14:26,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:14:26,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:14:26,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:14:29,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:14:29,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:14:29,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933322820] [2024-06-28 04:14:29,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933322820] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:14:29,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:14:29,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:14:29,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341652387] [2024-06-28 04:14:29,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:14:29,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:14:29,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:14:29,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:14:29,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:14:29,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:14:29,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 482 places, 768 transitions, 17124 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:14:29,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:14:29,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:14:29,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:14:32,261 INFO L124 PetriNetUnfolderBase]: 4068/6382 cut-off events. [2024-06-28 04:14:32,262 INFO L125 PetriNetUnfolderBase]: For 1374536/1374582 co-relation queries the response was YES. [2024-06-28 04:14:32,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83962 conditions, 6382 events. 4068/6382 cut-off events. For 1374536/1374582 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 37848 event pairs, 1054 based on Foata normal form. 38/6420 useless extension candidates. Maximal degree in co-relation 83732. Up to 5902 conditions per place. [2024-06-28 04:14:32,385 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 641 selfloop transitions, 161 changer transitions 0/806 dead transitions. [2024-06-28 04:14:32,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 806 transitions, 20168 flow [2024-06-28 04:14:32,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 04:14:32,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 04:14:32,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 159 transitions. [2024-06-28 04:14:32,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34415584415584416 [2024-06-28 04:14:32,387 INFO L175 Difference]: Start difference. First operand has 482 places, 768 transitions, 17124 flow. Second operand 11 states and 159 transitions. [2024-06-28 04:14:32,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 806 transitions, 20168 flow [2024-06-28 04:14:38,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 487 places, 806 transitions, 19852 flow, removed 112 selfloop flow, removed 5 redundant places. [2024-06-28 04:14:38,921 INFO L231 Difference]: Finished difference. Result has 489 places, 787 transitions, 18109 flow [2024-06-28 04:14:38,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=16808, PETRI_DIFFERENCE_MINUEND_PLACES=477, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=768, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=613, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=18109, PETRI_PLACES=489, PETRI_TRANSITIONS=787} [2024-06-28 04:14:38,922 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 446 predicate places. [2024-06-28 04:14:38,922 INFO L495 AbstractCegarLoop]: Abstraction has has 489 places, 787 transitions, 18109 flow [2024-06-28 04:14:38,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:14:38,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:14:38,923 INFO 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 04:14:38,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-28 04:14:38,923 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:14:38,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:14:38,923 INFO L85 PathProgramCache]: Analyzing trace with hash 2041162441, now seen corresponding path program 11 times [2024-06-28 04:14:38,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:14:38,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947934473] [2024-06-28 04:14:38,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:14:38,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:14:38,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:14:41,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:14:41,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:14:41,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947934473] [2024-06-28 04:14:41,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947934473] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:14:41,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:14:41,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:14:41,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681099742] [2024-06-28 04:14:41,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:14:41,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:14:41,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:14:41,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:14:41,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:14:41,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:14:41,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 489 places, 787 transitions, 18109 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:14:41,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:14:41,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:14:41,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:14:44,800 INFO L124 PetriNetUnfolderBase]: 4094/6395 cut-off events. [2024-06-28 04:14:44,800 INFO L125 PetriNetUnfolderBase]: For 1418210/1418248 co-relation queries the response was YES. [2024-06-28 04:14:44,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85460 conditions, 6395 events. 4094/6395 cut-off events. For 1418210/1418248 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 37622 event pairs, 728 based on Foata normal form. 22/6417 useless extension candidates. Maximal degree in co-relation 85228. Up to 5613 conditions per place. [2024-06-28 04:14:44,924 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 606 selfloop transitions, 202 changer transitions 0/812 dead transitions. [2024-06-28 04:14:44,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 497 places, 812 transitions, 20575 flow [2024-06-28 04:14:44,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:14:44,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:14:44,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-28 04:14:44,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37037037037037035 [2024-06-28 04:14:44,926 INFO L175 Difference]: Start difference. First operand has 489 places, 787 transitions, 18109 flow. Second operand 9 states and 140 transitions. [2024-06-28 04:14:44,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 497 places, 812 transitions, 20575 flow [2024-06-28 04:14:50,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 493 places, 812 transitions, 20248 flow, removed 124 selfloop flow, removed 4 redundant places. [2024-06-28 04:14:50,495 INFO L231 Difference]: Finished difference. Result has 494 places, 793 transitions, 18485 flow [2024-06-28 04:14:50,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=17782, PETRI_DIFFERENCE_MINUEND_PLACES=485, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=787, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=196, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=591, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=18485, PETRI_PLACES=494, PETRI_TRANSITIONS=793} [2024-06-28 04:14:50,496 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 451 predicate places. [2024-06-28 04:14:50,496 INFO L495 AbstractCegarLoop]: Abstraction has has 494 places, 793 transitions, 18485 flow [2024-06-28 04:14:50,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:14:50,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:14:50,496 INFO 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 04:14:50,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-28 04:14:50,496 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:14:50,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:14:50,497 INFO L85 PathProgramCache]: Analyzing trace with hash 2041162627, now seen corresponding path program 16 times [2024-06-28 04:14:50,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:14:50,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080036556] [2024-06-28 04:14:50,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:14:50,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:14:50,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:14:52,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:14:52,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:14:52,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080036556] [2024-06-28 04:14:52,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080036556] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:14:52,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:14:52,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:14:52,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317405151] [2024-06-28 04:14:52,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:14:52,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:14:52,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:14:52,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:14:52,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:14:52,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:14:52,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 494 places, 793 transitions, 18485 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:14:52,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:14:52,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:14:52,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:14:56,029 INFO L124 PetriNetUnfolderBase]: 4109/6439 cut-off events. [2024-06-28 04:14:56,030 INFO L125 PetriNetUnfolderBase]: For 1448535/1448581 co-relation queries the response was YES. [2024-06-28 04:14:56,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86446 conditions, 6439 events. 4109/6439 cut-off events. For 1448535/1448581 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 38239 event pairs, 1055 based on Foata normal form. 39/6478 useless extension candidates. Maximal degree in co-relation 86212. Up to 5994 conditions per place. [2024-06-28 04:14:56,154 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 685 selfloop transitions, 128 changer transitions 0/817 dead transitions. [2024-06-28 04:14:56,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 502 places, 817 transitions, 20600 flow [2024-06-28 04:14:56,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:14:56,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:14:56,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 134 transitions. [2024-06-28 04:14:56,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3544973544973545 [2024-06-28 04:14:56,156 INFO L175 Difference]: Start difference. First operand has 494 places, 793 transitions, 18485 flow. Second operand 9 states and 134 transitions. [2024-06-28 04:14:56,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 502 places, 817 transitions, 20600 flow [2024-06-28 04:15:03,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 498 places, 817 transitions, 20208 flow, removed 62 selfloop flow, removed 4 redundant places. [2024-06-28 04:15:03,075 INFO L231 Difference]: Finished difference. Result has 499 places, 801 transitions, 18781 flow [2024-06-28 04:15:03,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=18093, PETRI_DIFFERENCE_MINUEND_PLACES=490, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=793, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=665, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=18781, PETRI_PLACES=499, PETRI_TRANSITIONS=801} [2024-06-28 04:15:03,076 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 456 predicate places. [2024-06-28 04:15:03,076 INFO L495 AbstractCegarLoop]: Abstraction has has 499 places, 801 transitions, 18781 flow [2024-06-28 04:15:03,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:15:03,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:15:03,076 INFO 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 04:15:03,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-28 04:15:03,077 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:15:03,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:15:03,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1863910951, now seen corresponding path program 12 times [2024-06-28 04:15:03,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:15:03,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728623372] [2024-06-28 04:15:03,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:15:03,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:15:03,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:15:05,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:15:05,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:15:05,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728623372] [2024-06-28 04:15:05,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728623372] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:15:05,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:15:05,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:15:05,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134786793] [2024-06-28 04:15:05,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:15:05,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:15:05,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:15:05,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:15:05,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:15:05,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:15:05,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 499 places, 801 transitions, 18781 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:15:05,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:15:05,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:15:05,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:15:08,966 INFO L124 PetriNetUnfolderBase]: 4119/6420 cut-off events. [2024-06-28 04:15:08,966 INFO L125 PetriNetUnfolderBase]: For 1454478/1454484 co-relation queries the response was YES. [2024-06-28 04:15:09,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86477 conditions, 6420 events. 4119/6420 cut-off events. For 1454478/1454484 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 37571 event pairs, 678 based on Foata normal form. 2/6422 useless extension candidates. Maximal degree in co-relation 86242. Up to 6072 conditions per place. [2024-06-28 04:15:09,095 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 742 selfloop transitions, 74 changer transitions 0/820 dead transitions. [2024-06-28 04:15:09,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 507 places, 820 transitions, 20618 flow [2024-06-28 04:15:09,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:15:09,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:15:09,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 133 transitions. [2024-06-28 04:15:09,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35185185185185186 [2024-06-28 04:15:09,097 INFO L175 Difference]: Start difference. First operand has 499 places, 801 transitions, 18781 flow. Second operand 9 states and 133 transitions. [2024-06-28 04:15:09,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 507 places, 820 transitions, 20618 flow [2024-06-28 04:15:15,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 498 places, 820 transitions, 20088 flow, removed 113 selfloop flow, removed 9 redundant places. [2024-06-28 04:15:15,276 INFO L231 Difference]: Finished difference. Result has 499 places, 804 transitions, 18544 flow [2024-06-28 04:15:15,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=18251, PETRI_DIFFERENCE_MINUEND_PLACES=490, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=801, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=727, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=18544, PETRI_PLACES=499, PETRI_TRANSITIONS=804} [2024-06-28 04:15:15,277 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 456 predicate places. [2024-06-28 04:15:15,277 INFO L495 AbstractCegarLoop]: Abstraction has has 499 places, 804 transitions, 18544 flow [2024-06-28 04:15:15,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:15:15,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:15:15,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:15:15,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-28 04:15:15,278 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:15:15,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:15:15,278 INFO L85 PathProgramCache]: Analyzing trace with hash -355220309, now seen corresponding path program 17 times [2024-06-28 04:15:15,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:15:15,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906283341] [2024-06-28 04:15:15,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:15:15,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:15:15,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:15:17,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:15:17,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:15:17,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906283341] [2024-06-28 04:15:17,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906283341] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:15:17,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:15:17,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:15:17,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702589437] [2024-06-28 04:15:17,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:15:17,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:15:17,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:15:17,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:15:17,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:15:17,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:15:17,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 499 places, 804 transitions, 18544 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:15:17,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:15:17,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:15:17,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:15:21,171 INFO L124 PetriNetUnfolderBase]: 4131/6465 cut-off events. [2024-06-28 04:15:21,171 INFO L125 PetriNetUnfolderBase]: For 1487779/1487825 co-relation queries the response was YES. [2024-06-28 04:15:21,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86771 conditions, 6465 events. 4131/6465 cut-off events. For 1487779/1487825 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 38310 event pairs, 1059 based on Foata normal form. 49/6514 useless extension candidates. Maximal degree in co-relation 86535. Up to 5824 conditions per place. [2024-06-28 04:15:21,307 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 607 selfloop transitions, 229 changer transitions 0/840 dead transitions. [2024-06-28 04:15:21,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 509 places, 840 transitions, 21360 flow [2024-06-28 04:15:21,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 04:15:21,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 04:15:21,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 166 transitions. [2024-06-28 04:15:21,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3593073593073593 [2024-06-28 04:15:21,308 INFO L175 Difference]: Start difference. First operand has 499 places, 804 transitions, 18544 flow. Second operand 11 states and 166 transitions. [2024-06-28 04:15:21,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 509 places, 840 transitions, 21360 flow [2024-06-28 04:15:28,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 498 places, 840 transitions, 20801 flow, removed 104 selfloop flow, removed 11 redundant places. [2024-06-28 04:15:28,245 INFO L231 Difference]: Finished difference. Result has 501 places, 815 transitions, 19158 flow [2024-06-28 04:15:28,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=17985, PETRI_DIFFERENCE_MINUEND_PLACES=488, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=804, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=221, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=578, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=19158, PETRI_PLACES=501, PETRI_TRANSITIONS=815} [2024-06-28 04:15:28,246 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 458 predicate places. [2024-06-28 04:15:28,246 INFO L495 AbstractCegarLoop]: Abstraction has has 501 places, 815 transitions, 19158 flow [2024-06-28 04:15:28,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:15:28,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:15:28,246 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:15:28,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-28 04:15:28,246 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:15:28,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:15:28,247 INFO L85 PathProgramCache]: Analyzing trace with hash -733930957, now seen corresponding path program 18 times [2024-06-28 04:15:28,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:15:28,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577305882] [2024-06-28 04:15:28,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:15:28,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:15:28,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:15:30,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:15:30,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:15:30,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577305882] [2024-06-28 04:15:30,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577305882] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:15:30,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:15:30,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:15:30,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824815050] [2024-06-28 04:15:30,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:15:30,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:15:30,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:15:30,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:15:30,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:15:30,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:15:30,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 501 places, 815 transitions, 19158 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:15:30,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:15:30,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:15:30,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:15:33,552 INFO L124 PetriNetUnfolderBase]: 4133/6468 cut-off events. [2024-06-28 04:15:33,552 INFO L125 PetriNetUnfolderBase]: For 1497714/1497760 co-relation queries the response was YES. [2024-06-28 04:15:33,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87422 conditions, 6468 events. 4133/6468 cut-off events. For 1497714/1497760 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 38355 event pairs, 1061 based on Foata normal form. 38/6506 useless extension candidates. Maximal degree in co-relation 87185. Up to 5903 conditions per place. [2024-06-28 04:15:33,691 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 632 selfloop transitions, 203 changer transitions 0/839 dead transitions. [2024-06-28 04:15:33,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 509 places, 839 transitions, 21576 flow [2024-06-28 04:15:33,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:15:33,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:15:33,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 139 transitions. [2024-06-28 04:15:33,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36772486772486773 [2024-06-28 04:15:33,692 INFO L175 Difference]: Start difference. First operand has 501 places, 815 transitions, 19158 flow. Second operand 9 states and 139 transitions. [2024-06-28 04:15:33,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 509 places, 839 transitions, 21576 flow [2024-06-28 04:15:40,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 503 places, 839 transitions, 21258 flow, removed 84 selfloop flow, removed 6 redundant places. [2024-06-28 04:15:40,040 INFO L231 Difference]: Finished difference. Result has 505 places, 822 transitions, 19756 flow [2024-06-28 04:15:40,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=18840, PETRI_DIFFERENCE_MINUEND_PLACES=495, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=815, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=199, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=615, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=19756, PETRI_PLACES=505, PETRI_TRANSITIONS=822} [2024-06-28 04:15:40,040 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 462 predicate places. [2024-06-28 04:15:40,041 INFO L495 AbstractCegarLoop]: Abstraction has has 505 places, 822 transitions, 19756 flow [2024-06-28 04:15:40,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:15:40,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:15:40,041 INFO 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 04:15:40,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-28 04:15:40,041 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:15:40,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:15:40,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1368354099, now seen corresponding path program 13 times [2024-06-28 04:15:40,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:15:40,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686761292] [2024-06-28 04:15:40,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:15:40,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:15:40,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:15:42,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:15:42,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:15:42,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686761292] [2024-06-28 04:15:42,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686761292] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:15:42,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:15:42,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:15:42,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153847943] [2024-06-28 04:15:42,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:15:42,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:15:42,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:15:42,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:15:42,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:15:42,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:15:42,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 505 places, 822 transitions, 19756 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:15:42,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:15:42,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:15:42,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:15:45,899 INFO L124 PetriNetUnfolderBase]: 4127/6431 cut-off events. [2024-06-28 04:15:45,899 INFO L125 PetriNetUnfolderBase]: For 1507303/1507341 co-relation queries the response was YES. [2024-06-28 04:15:45,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87743 conditions, 6431 events. 4127/6431 cut-off events. For 1507303/1507341 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 37708 event pairs, 728 based on Foata normal form. 22/6453 useless extension candidates. Maximal degree in co-relation 87503. Up to 5660 conditions per place. [2024-06-28 04:15:46,035 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 632 selfloop transitions, 205 changer transitions 0/841 dead transitions. [2024-06-28 04:15:46,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 514 places, 841 transitions, 21771 flow [2024-06-28 04:15:46,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:15:46,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:15:46,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 150 transitions. [2024-06-28 04:15:46,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35714285714285715 [2024-06-28 04:15:46,036 INFO L175 Difference]: Start difference. First operand has 505 places, 822 transitions, 19756 flow. Second operand 10 states and 150 transitions. [2024-06-28 04:15:46,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 514 places, 841 transitions, 21771 flow Killed by 15