./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe001_power.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe001_power.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f 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/safe001_power.oepc.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe001_power.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 21:28:50,770 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 21:28:50,832 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 21:28:50,837 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 21:28:50,837 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 21:28:50,867 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 21:28:50,868 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 21:28:50,868 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 21:28:50,868 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 21:28:50,871 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 21:28:50,872 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 21:28:50,872 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 21:28:50,873 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 21:28:50,874 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 21:28:50,874 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 21:28:50,874 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 21:28:50,874 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 21:28:50,874 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 21:28:50,875 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 21:28:50,875 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 21:28:50,875 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 21:28:50,875 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 21:28:50,876 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 21:28:50,876 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 21:28:50,876 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 21:28:50,876 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 21:28:50,876 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 21:28:50,877 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 21:28:50,877 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 21:28:50,877 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 21:28:50,879 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 21:28:50,879 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 21:28:50,879 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 21:28:50,879 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 21:28:50,880 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 21:28:50,880 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 21:28:50,880 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 21:28:50,880 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 21:28:50,880 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 21:28:50,880 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 21:28:50,881 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 21:28:50,881 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 21:28:50,881 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 21:28:50,881 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 21:28:51,092 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 21:28:51,112 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 21:28:51,114 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 21:28:51,115 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 21:28:51,116 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 21:28:51,117 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe001_power.oepc.yml/witness.yml [2024-06-21 21:28:51,327 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 21:28:51,327 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 21:28:51,328 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe001_power.oepc.i [2024-06-21 21:28:52,331 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 21:28:52,554 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 21:28:52,555 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe001_power.oepc.i [2024-06-21 21:28:52,566 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f13f9f96/00929cbcef7943bdac467eccc3b92ac6/FLAGb0240cb0d [2024-06-21 21:28:52,576 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f13f9f96/00929cbcef7943bdac467eccc3b92ac6 [2024-06-21 21:28:52,577 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 21:28:52,578 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 21:28:52,579 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 21:28:52,579 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 21:28:52,588 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 21:28:52,589 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 09:28:51" (1/2) ... [2024-06-21 21:28:52,590 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5aa34c3b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:28:52, skipping insertion in model container [2024-06-21 21:28:52,590 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 09:28:51" (1/2) ... [2024-06-21 21:28:52,591 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@16ff409f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:28:52, skipping insertion in model container [2024-06-21 21:28:52,591 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 09:28:52" (2/2) ... [2024-06-21 21:28:52,591 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5aa34c3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:28:52, skipping insertion in model container [2024-06-21 21:28:52,592 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 09:28:52" (2/2) ... [2024-06-21 21:28:52,592 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 21:28:52,705 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 21:28:52,706 INFO L97 edCorrectnessWitness]: Location invariant before [L857-L857] (((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (((((((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p0_EAX$flush_delayed == (_Bool)0) && __unbuffered_p0_EAX$mem_tmp == 0) && __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p0_EAX$w_buff0 == 0) && __unbuffered_p0_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p0_EAX$w_buff1 == 0) && __unbuffered_p0_EAX$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_thd2 == (_Bool)0) && y$r_buff0_thd3 == (_Bool)0) && y$r_buff1_thd0 == (_Bool)0) && y$r_buff1_thd1 == (_Bool)0) && y$r_buff1_thd2 == (_Bool)0) && y$r_buff1_thd3 == (_Bool)0) && y$read_delayed == (_Bool)0) && y$read_delayed_var == 0) && y$w_buff0 == 0) && y$w_buff0_used == (_Bool)0) && y$w_buff1 == 0) && y$w_buff1_used == (_Bool)0) && (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2)))) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((x == 0 || x == 1) || x == 2)) && ((y == 0 || y == 1) || y == 2)) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2))))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || y$read_delayed_var == 0) [2024-06-21 21:28:52,706 INFO L97 edCorrectnessWitness]: Location invariant before [L856-L856] (((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (((((((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p0_EAX$flush_delayed == (_Bool)0) && __unbuffered_p0_EAX$mem_tmp == 0) && __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p0_EAX$w_buff0 == 0) && __unbuffered_p0_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p0_EAX$w_buff1 == 0) && __unbuffered_p0_EAX$w_buff1_used == (_Bool)0) && y$flush_delayed == (_Bool)0) && y$r_buff0_thd0 == (_Bool)0) && y$r_buff0_thd1 == (_Bool)0) && y$r_buff0_thd2 == (_Bool)0) && y$r_buff0_thd3 == (_Bool)0) && y$r_buff1_thd0 == (_Bool)0) && y$r_buff1_thd1 == (_Bool)0) && y$r_buff1_thd2 == (_Bool)0) && y$r_buff1_thd3 == (_Bool)0) && y$read_delayed == (_Bool)0) && y$read_delayed_var == 0) && y$w_buff0 == 0) && y$w_buff0_used == (_Bool)0) && y$w_buff1 == 0) && y$w_buff1_used == (_Bool)0) && (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2)))) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((x == 0 || x == 1) || x == 2)) && ((y == 0 || y == 1) || y == 2)) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2))))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || y$read_delayed_var == 0) [2024-06-21 21:28:52,706 INFO L97 edCorrectnessWitness]: Location invariant before [L854-L854] (((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (((((((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p0_EAX$flush_delayed == (_Bool)0) && __unbuffered_p0_EAX$mem_tmp == 0) && __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p0_EAX$w_buff0 == 0) && __unbuffered_p0_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p0_EAX$w_buff1 == 0) && __unbuffered_p0_EAX$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_thd2 == (_Bool)0) && y$r_buff0_thd3 == (_Bool)0) && y$r_buff1_thd0 == (_Bool)0) && y$r_buff1_thd1 == (_Bool)0) && y$r_buff1_thd2 == (_Bool)0) && y$r_buff1_thd3 == (_Bool)0) && y$read_delayed == (_Bool)0) && y$read_delayed_var == 0) && y$w_buff0 == 0) && y$w_buff0_used == (_Bool)0) && y$w_buff1 == 0) && y$w_buff1_used == (_Bool)0) && (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2)))) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((x == 0 || x == 1) || x == 2)) && ((y == 0 || y == 1) || y == 2)) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2))))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || y$read_delayed_var == 0) [2024-06-21 21:28:52,706 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 21:28:52,707 INFO L106 edCorrectnessWitness]: ghost_update [L852-L852] multithreaded = 1; [2024-06-21 21:28:52,744 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 21:28:53,061 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 21:28:53,068 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 21:28:53,186 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 21:28:53,226 INFO L206 MainTranslator]: Completed translation [2024-06-21 21:28:53,227 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:28:53 WrapperNode [2024-06-21 21:28:53,227 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 21:28:53,228 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 21:28:53,228 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 21:28:53,228 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 21:28:53,233 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:28:53" (1/1) ... [2024-06-21 21:28:53,248 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:28:53" (1/1) ... [2024-06-21 21:28:53,283 INFO L138 Inliner]: procedures = 175, calls = 109, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 282 [2024-06-21 21:28:53,287 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 21:28:53,288 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 21:28:53,289 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 21:28:53,289 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 21:28:53,297 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:28:53" (1/1) ... [2024-06-21 21:28:53,297 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:28:53" (1/1) ... [2024-06-21 21:28:53,302 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:28:53" (1/1) ... [2024-06-21 21:28:53,322 INFO L175 MemorySlicer]: Split 68 memory accesses to 2 slices as follows [2, 66]. 97 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 11 writes are split as follows [0, 11]. [2024-06-21 21:28:53,323 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:28:53" (1/1) ... [2024-06-21 21:28:53,323 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:28:53" (1/1) ... [2024-06-21 21:28:53,344 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:28:53" (1/1) ... [2024-06-21 21:28:53,346 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:28:53" (1/1) ... [2024-06-21 21:28:53,349 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:28:53" (1/1) ... [2024-06-21 21:28:53,351 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:28:53" (1/1) ... [2024-06-21 21:28:53,355 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 21:28:53,356 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 21:28:53,356 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 21:28:53,356 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 21:28:53,364 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:28:53" (1/1) ... [2024-06-21 21:28:53,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 21:28:53,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 21:28:53,387 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) [2024-06-21 21:28:53,403 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 [2024-06-21 21:28:53,417 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-21 21:28:53,417 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-21 21:28:53,417 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-21 21:28:53,417 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-21 21:28:53,417 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 21:28:53,417 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 21:28:53,417 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 21:28:53,418 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 21:28:53,418 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 21:28:53,418 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 21:28:53,418 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 21:28:53,418 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 21:28:53,418 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 21:28:53,418 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-21 21:28:53,418 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 21:28:53,419 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 21:28:53,419 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 21:28:53,420 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 21:28:53,558 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 21:28:53,560 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 21:28:54,157 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 21:28:54,157 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 21:28:54,599 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 21:28:54,599 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 21:28:54,600 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 09:28:54 BoogieIcfgContainer [2024-06-21 21:28:54,600 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 21:28:54,602 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 21:28:54,602 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 21:28:54,604 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 21:28:54,604 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 09:28:51" (1/4) ... [2024-06-21 21:28:54,605 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17da307d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 09:28:54, skipping insertion in model container [2024-06-21 21:28:54,605 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 09:28:52" (2/4) ... [2024-06-21 21:28:54,605 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17da307d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 09:28:54, skipping insertion in model container [2024-06-21 21:28:54,605 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:28:53" (3/4) ... [2024-06-21 21:28:54,605 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17da307d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 09:28:54, skipping insertion in model container [2024-06-21 21:28:54,606 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 09:28:54" (4/4) ... [2024-06-21 21:28:54,607 INFO L112 eAbstractionObserver]: Analyzing ICFG safe001_power.oepc.i [2024-06-21 21:28:54,620 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 21:28:54,620 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 21:28:54,621 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 21:28:54,676 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 21:28:54,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-21 21:28:54,733 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-21 21:28:54,734 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 21:28:54,735 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 55 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. [2024-06-21 21:28:54,735 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-21 21:28:54,738 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-21 21:28:54,749 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 21:28:54,755 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;@30bcf1cb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 21:28:54,755 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 21:28:54,763 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 21:28:54,763 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-21 21:28:54,763 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 21:28:54,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:28:54,764 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 21:28:54,765 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)] === [2024-06-21 21:28:54,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:28:54,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1003445186, now seen corresponding path program 1 times [2024-06-21 21:28:54,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:28:54,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286065898] [2024-06-21 21:28:54,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:28:54,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:28:54,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:28:56,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:28:56,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:28:56,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286065898] [2024-06-21 21:28:56,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286065898] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:28:56,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:28:56,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 21:28:56,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608560168] [2024-06-21 21:28:56,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:28:56,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 21:28:56,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:28:56,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 21:28:56,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 21:28:56,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:28:56,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:28:56,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:28:56,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:28:56,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:28:57,287 INFO L124 PetriNetUnfolderBase]: 1409/2137 cut-off events. [2024-06-21 21:28:57,287 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-06-21 21:28:57,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4335 conditions, 2137 events. 1409/2137 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9990 event pairs, 873 based on Foata normal form. 2/2102 useless extension candidates. Maximal degree in co-relation 4323. Up to 2108 conditions per place. [2024-06-21 21:28:57,300 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 37 selfloop transitions, 4 changer transitions 0/46 dead transitions. [2024-06-21 21:28:57,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 46 transitions, 189 flow [2024-06-21 21:28:57,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 21:28:57,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 21:28:57,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 68 transitions. [2024-06-21 21:28:57,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5396825396825397 [2024-06-21 21:28:57,310 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 68 transitions. [2024-06-21 21:28:57,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 46 transitions, 189 flow [2024-06-21 21:28:57,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 46 transitions, 184 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 21:28:57,316 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-21 21:28:57,317 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} [2024-06-21 21:28:57,320 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-21 21:28:57,320 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-21 21:28:57,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:28:57,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:28:57,321 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:28:57,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 21:28:57,321 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)] === [2024-06-21 21:28:57,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:28:57,322 INFO L85 PathProgramCache]: Analyzing trace with hash -2056767679, now seen corresponding path program 1 times [2024-06-21 21:28:57,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:28:57,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483400411] [2024-06-21 21:28:57,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:28:57,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:28:57,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:28:59,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:28:59,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:28:59,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483400411] [2024-06-21 21:28:59,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483400411] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:28:59,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:28:59,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 21:28:59,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386780552] [2024-06-21 21:28:59,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:28:59,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 21:28:59,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:28:59,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 21:28:59,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-21 21:28:59,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:28:59,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:28:59,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:28:59,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:28:59,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:29:00,173 INFO L124 PetriNetUnfolderBase]: 1400/2124 cut-off events. [2024-06-21 21:29:00,174 INFO L125 PetriNetUnfolderBase]: For 387/387 co-relation queries the response was YES. [2024-06-21 21:29:00,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4874 conditions, 2124 events. 1400/2124 cut-off events. For 387/387 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9996 event pairs, 726 based on Foata normal form. 4/2125 useless extension candidates. Maximal degree in co-relation 4862. Up to 2071 conditions per place. [2024-06-21 21:29:00,183 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 47 selfloop transitions, 7 changer transitions 0/59 dead transitions. [2024-06-21 21:29:00,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 59 transitions, 268 flow [2024-06-21 21:29:00,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 21:29:00,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 21:29:00,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 89 transitions. [2024-06-21 21:29:00,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5297619047619048 [2024-06-21 21:29:00,185 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 89 transitions. [2024-06-21 21:29:00,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 59 transitions, 268 flow [2024-06-21 21:29:00,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 59 transitions, 264 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 21:29:00,187 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-21 21:29:00,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2024-06-21 21:29:00,188 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-21 21:29:00,188 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-21 21:29:00,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:29:00,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:29:00,188 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:29:00,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 21:29:00,189 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:29:00,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:29:00,189 INFO L85 PathProgramCache]: Analyzing trace with hash 664713020, now seen corresponding path program 1 times [2024-06-21 21:29:00,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:29:00,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934424182] [2024-06-21 21:29:00,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:29:00,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:29:00,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:29:02,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:29:02,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:29:02,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934424182] [2024-06-21 21:29:02,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934424182] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:29:02,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:29:02,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 21:29:02,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012575786] [2024-06-21 21:29:02,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:29:02,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 21:29:02,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:29:02,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 21:29:02,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 21:29:02,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:29:02,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 138 flow. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:29:02,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:29:02,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:29:02,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:29:03,210 INFO L124 PetriNetUnfolderBase]: 1414/2157 cut-off events. [2024-06-21 21:29:03,210 INFO L125 PetriNetUnfolderBase]: For 1112/1112 co-relation queries the response was YES. [2024-06-21 21:29:03,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5477 conditions, 2157 events. 1414/2157 cut-off events. For 1112/1112 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 10276 event pairs, 512 based on Foata normal form. 7/2160 useless extension candidates. Maximal degree in co-relation 5463. Up to 1977 conditions per place. [2024-06-21 21:29:03,221 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 63 selfloop transitions, 16 changer transitions 0/84 dead transitions. [2024-06-21 21:29:03,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 84 transitions, 434 flow [2024-06-21 21:29:03,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 21:29:03,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 21:29:03,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-21 21:29:03,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5619047619047619 [2024-06-21 21:29:03,225 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 5 states and 118 transitions. [2024-06-21 21:29:03,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 84 transitions, 434 flow [2024-06-21 21:29:03,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 84 transitions, 420 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-21 21:29:03,227 INFO L231 Difference]: Finished difference. Result has 51 places, 50 transitions, 237 flow [2024-06-21 21:29:03,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=237, PETRI_PLACES=51, PETRI_TRANSITIONS=50} [2024-06-21 21:29:03,228 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 8 predicate places. [2024-06-21 21:29:03,228 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 50 transitions, 237 flow [2024-06-21 21:29:03,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:29:03,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:29:03,229 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:29:03,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 21:29:03,229 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:29:03,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:29:03,229 INFO L85 PathProgramCache]: Analyzing trace with hash -2021520201, now seen corresponding path program 1 times [2024-06-21 21:29:03,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:29:03,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886734572] [2024-06-21 21:29:03,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:29:03,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:29:03,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:29:05,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:29:05,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:29:05,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886734572] [2024-06-21 21:29:05,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886734572] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:29:05,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:29:05,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 21:29:05,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139702298] [2024-06-21 21:29:05,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:29:05,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 21:29:05,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:29:05,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 21:29:05,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 21:29:05,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:29:05,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 50 transitions, 237 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) [2024-06-21 21:29:05,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:29:05,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:29:05,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:29:06,351 INFO L124 PetriNetUnfolderBase]: 1435/2192 cut-off events. [2024-06-21 21:29:06,351 INFO L125 PetriNetUnfolderBase]: For 2633/2633 co-relation queries the response was YES. [2024-06-21 21:29:06,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6591 conditions, 2192 events. 1435/2192 cut-off events. For 2633/2633 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 10531 event pairs, 349 based on Foata normal form. 14/2202 useless extension candidates. Maximal degree in co-relation 6574. Up to 1924 conditions per place. [2024-06-21 21:29:06,363 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 69 selfloop transitions, 19 changer transitions 0/93 dead transitions. [2024-06-21 21:29:06,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 93 transitions, 545 flow [2024-06-21 21:29:06,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:29:06,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:29:06,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 135 transitions. [2024-06-21 21:29:06,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-06-21 21:29:06,365 INFO L175 Difference]: Start difference. First operand has 51 places, 50 transitions, 237 flow. Second operand 6 states and 135 transitions. [2024-06-21 21:29:06,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 93 transitions, 545 flow [2024-06-21 21:29:06,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 93 transitions, 537 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-21 21:29:06,369 INFO L231 Difference]: Finished difference. Result has 56 places, 52 transitions, 293 flow [2024-06-21 21:29:06,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=293, PETRI_PLACES=56, PETRI_TRANSITIONS=52} [2024-06-21 21:29:06,370 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 13 predicate places. [2024-06-21 21:29:06,370 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 52 transitions, 293 flow [2024-06-21 21:29:06,370 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) [2024-06-21 21:29:06,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:29:06,371 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:29:06,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 21:29:06,371 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)] === [2024-06-21 21:29:06,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:29:06,371 INFO L85 PathProgramCache]: Analyzing trace with hash -259539519, now seen corresponding path program 1 times [2024-06-21 21:29:06,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:29:06,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001808366] [2024-06-21 21:29:06,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:29:06,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:29:06,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:29:07,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:29:07,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:29:07,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001808366] [2024-06-21 21:29:07,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001808366] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:29:07,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:29:07,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 21:29:07,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030585446] [2024-06-21 21:29:07,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:29:07,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 21:29:07,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:29:07,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 21:29:07,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 21:29:07,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:29:07,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 52 transitions, 293 flow. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:29:07,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:29:07,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:29:07,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:29:08,398 INFO L124 PetriNetUnfolderBase]: 1427/2180 cut-off events. [2024-06-21 21:29:08,398 INFO L125 PetriNetUnfolderBase]: For 3892/3892 co-relation queries the response was YES. [2024-06-21 21:29:08,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7157 conditions, 2180 events. 1427/2180 cut-off events. For 3892/3892 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 10392 event pairs, 503 based on Foata normal form. 3/2180 useless extension candidates. Maximal degree in co-relation 7136. Up to 2124 conditions per place. [2024-06-21 21:29:08,411 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 56 selfloop transitions, 8 changer transitions 0/68 dead transitions. [2024-06-21 21:29:08,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 68 transitions, 459 flow [2024-06-21 21:29:08,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 21:29:08,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 21:29:08,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 87 transitions. [2024-06-21 21:29:08,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142857142857143 [2024-06-21 21:29:08,417 INFO L175 Difference]: Start difference. First operand has 56 places, 52 transitions, 293 flow. Second operand 5 states and 87 transitions. [2024-06-21 21:29:08,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 68 transitions, 459 flow [2024-06-21 21:29:08,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 68 transitions, 409 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-21 21:29:08,426 INFO L231 Difference]: Finished difference. Result has 57 places, 52 transitions, 267 flow [2024-06-21 21:29:08,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=267, PETRI_PLACES=57, PETRI_TRANSITIONS=52} [2024-06-21 21:29:08,428 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 14 predicate places. [2024-06-21 21:29:08,429 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 52 transitions, 267 flow [2024-06-21 21:29:08,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:29:08,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:29:08,429 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:29:08,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 21:29:08,429 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)] === [2024-06-21 21:29:08,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:29:08,430 INFO L85 PathProgramCache]: Analyzing trace with hash 543432578, now seen corresponding path program 1 times [2024-06-21 21:29:08,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:29:08,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093611901] [2024-06-21 21:29:08,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:29:08,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:29:08,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:29:09,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:29:09,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:29:09,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093611901] [2024-06-21 21:29:09,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093611901] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:29:09,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:29:09,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:29:09,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748660485] [2024-06-21 21:29:09,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:29:09,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:29:09,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:29:09,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:29:09,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:29:10,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:29:10,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 52 transitions, 267 flow. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:29:10,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:29:10,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:29:10,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:29:11,088 INFO L124 PetriNetUnfolderBase]: 1417/2162 cut-off events. [2024-06-21 21:29:11,088 INFO L125 PetriNetUnfolderBase]: For 4555/4555 co-relation queries the response was YES. [2024-06-21 21:29:11,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7079 conditions, 2162 events. 1417/2162 cut-off events. For 4555/4555 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 10157 event pairs, 551 based on Foata normal form. 4/2163 useless extension candidates. Maximal degree in co-relation 7056. Up to 2096 conditions per place. [2024-06-21 21:29:11,101 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 66 selfloop transitions, 11 changer transitions 0/81 dead transitions. [2024-06-21 21:29:11,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 81 transitions, 521 flow [2024-06-21 21:29:11,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:29:11,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:29:11,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-21 21:29:11,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4007936507936508 [2024-06-21 21:29:11,103 INFO L175 Difference]: Start difference. First operand has 57 places, 52 transitions, 267 flow. Second operand 6 states and 101 transitions. [2024-06-21 21:29:11,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 81 transitions, 521 flow [2024-06-21 21:29:11,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 81 transitions, 489 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-21 21:29:11,108 INFO L231 Difference]: Finished difference. Result has 61 places, 61 transitions, 339 flow [2024-06-21 21:29:11,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=339, PETRI_PLACES=61, PETRI_TRANSITIONS=61} [2024-06-21 21:29:11,110 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 18 predicate places. [2024-06-21 21:29:11,111 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 61 transitions, 339 flow [2024-06-21 21:29:11,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:29:11,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:29:11,111 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:29:11,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 21:29:11,111 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)] === [2024-06-21 21:29:11,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:29:11,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1976516284, now seen corresponding path program 1 times [2024-06-21 21:29:11,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:29:11,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475267377] [2024-06-21 21:29:11,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:29:11,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:29:11,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:29:13,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:29:13,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:29:13,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475267377] [2024-06-21 21:29:13,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475267377] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:29:13,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:29:13,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:29:13,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122657298] [2024-06-21 21:29:13,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:29:13,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:29:13,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:29:13,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:29:13,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:29:13,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:29:13,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 61 transitions, 339 flow. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:29:13,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:29:13,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:29:13,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:29:14,198 INFO L124 PetriNetUnfolderBase]: 1427/2178 cut-off events. [2024-06-21 21:29:14,199 INFO L125 PetriNetUnfolderBase]: For 5853/5856 co-relation queries the response was YES. [2024-06-21 21:29:14,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7681 conditions, 2178 events. 1427/2178 cut-off events. For 5853/5856 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 10316 event pairs, 496 based on Foata normal form. 8/2182 useless extension candidates. Maximal degree in co-relation 7656. Up to 1997 conditions per place. [2024-06-21 21:29:14,210 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 65 selfloop transitions, 22 changer transitions 0/91 dead transitions. [2024-06-21 21:29:14,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 91 transitions, 627 flow [2024-06-21 21:29:14,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:29:14,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:29:14,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 113 transitions. [2024-06-21 21:29:14,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44841269841269843 [2024-06-21 21:29:14,212 INFO L175 Difference]: Start difference. First operand has 61 places, 61 transitions, 339 flow. Second operand 6 states and 113 transitions. [2024-06-21 21:29:14,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 91 transitions, 627 flow [2024-06-21 21:29:14,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 91 transitions, 621 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-21 21:29:14,216 INFO L231 Difference]: Finished difference. Result has 66 places, 64 transitions, 411 flow [2024-06-21 21:29:14,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=333, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=411, PETRI_PLACES=66, PETRI_TRANSITIONS=64} [2024-06-21 21:29:14,217 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 23 predicate places. [2024-06-21 21:29:14,217 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 64 transitions, 411 flow [2024-06-21 21:29:14,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:29:14,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:29:14,217 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:29:14,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 21:29:14,218 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)] === [2024-06-21 21:29:14,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:29:14,218 INFO L85 PathProgramCache]: Analyzing trace with hash -309334976, now seen corresponding path program 2 times [2024-06-21 21:29:14,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:29:14,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75457313] [2024-06-21 21:29:14,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:29:14,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:29:14,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:29:16,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:29:16,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:29:16,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75457313] [2024-06-21 21:29:16,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75457313] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:29:16,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:29:16,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:29:16,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280385833] [2024-06-21 21:29:16,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:29:16,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:29:16,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:29:16,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:29:16,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:29:16,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:29:16,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 64 transitions, 411 flow. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:29:16,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:29:16,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:29:16,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:29:17,017 INFO L124 PetriNetUnfolderBase]: 1407/2136 cut-off events. [2024-06-21 21:29:17,017 INFO L125 PetriNetUnfolderBase]: For 7168/7168 co-relation queries the response was YES. [2024-06-21 21:29:17,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7874 conditions, 2136 events. 1407/2136 cut-off events. For 7168/7168 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 9967 event pairs, 514 based on Foata normal form. 3/2130 useless extension candidates. Maximal degree in co-relation 7846. Up to 1973 conditions per place. [2024-06-21 21:29:17,029 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 59 selfloop transitions, 23 changer transitions 0/86 dead transitions. [2024-06-21 21:29:17,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 86 transitions, 633 flow [2024-06-21 21:29:17,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:29:17,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:29:17,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-21 21:29:17,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 21:29:17,031 INFO L175 Difference]: Start difference. First operand has 66 places, 64 transitions, 411 flow. Second operand 6 states and 108 transitions. [2024-06-21 21:29:17,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 86 transitions, 633 flow [2024-06-21 21:29:17,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 86 transitions, 600 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 21:29:17,038 INFO L231 Difference]: Finished difference. Result has 69 places, 64 transitions, 433 flow [2024-06-21 21:29:17,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=378, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=433, PETRI_PLACES=69, PETRI_TRANSITIONS=64} [2024-06-21 21:29:17,039 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 26 predicate places. [2024-06-21 21:29:17,039 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 64 transitions, 433 flow [2024-06-21 21:29:17,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:29:17,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:29:17,039 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:29:17,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 21:29:17,040 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)] === [2024-06-21 21:29:17,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:29:17,040 INFO L85 PathProgramCache]: Analyzing trace with hash -290660927, now seen corresponding path program 1 times [2024-06-21 21:29:17,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:29:17,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239464722] [2024-06-21 21:29:17,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:29:17,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:29:17,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:29:18,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:29:18,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:29:18,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239464722] [2024-06-21 21:29:18,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239464722] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:29:18,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:29:18,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:29:18,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153582829] [2024-06-21 21:29:18,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:29:18,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:29:18,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:29:18,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:29:18,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:29:18,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:29:18,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 64 transitions, 433 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) [2024-06-21 21:29:18,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:29:18,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:29:18,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:29:20,673 INFO L124 PetriNetUnfolderBase]: 2219/3316 cut-off events. [2024-06-21 21:29:20,673 INFO L125 PetriNetUnfolderBase]: For 12855/12858 co-relation queries the response was YES. [2024-06-21 21:29:20,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12394 conditions, 3316 events. 2219/3316 cut-off events. For 12855/12858 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 16093 event pairs, 571 based on Foata normal form. 22/3334 useless extension candidates. Maximal degree in co-relation 12365. Up to 2314 conditions per place. [2024-06-21 21:29:20,688 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 110 selfloop transitions, 57 changer transitions 0/171 dead transitions. [2024-06-21 21:29:20,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 171 transitions, 1314 flow [2024-06-21 21:29:20,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:29:20,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:29:20,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 215 transitions. [2024-06-21 21:29:20,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4653679653679654 [2024-06-21 21:29:20,690 INFO L175 Difference]: Start difference. First operand has 69 places, 64 transitions, 433 flow. Second operand 11 states and 215 transitions. [2024-06-21 21:29:20,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 171 transitions, 1314 flow [2024-06-21 21:29:20,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 171 transitions, 1179 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 21:29:20,700 INFO L231 Difference]: Finished difference. Result has 80 places, 102 transitions, 776 flow [2024-06-21 21:29:20,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=359, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=776, PETRI_PLACES=80, PETRI_TRANSITIONS=102} [2024-06-21 21:29:20,701 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 37 predicate places. [2024-06-21 21:29:20,701 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 102 transitions, 776 flow [2024-06-21 21:29:20,701 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) [2024-06-21 21:29:20,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:29:20,702 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:29:20,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 21:29:20,702 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)] === [2024-06-21 21:29:20,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:29:20,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1514434287, now seen corresponding path program 2 times [2024-06-21 21:29:20,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:29:20,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672310339] [2024-06-21 21:29:20,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:29:20,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:29:20,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:29:23,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:29:23,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:29:23,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672310339] [2024-06-21 21:29:23,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672310339] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:29:23,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:29:23,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:29:23,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845768610] [2024-06-21 21:29:23,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:29:23,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:29:23,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:29:23,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:29:23,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:29:23,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:29:23,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 102 transitions, 776 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) [2024-06-21 21:29:23,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:29:23,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:29:23,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:29:24,428 INFO L124 PetriNetUnfolderBase]: 2651/3928 cut-off events. [2024-06-21 21:29:24,428 INFO L125 PetriNetUnfolderBase]: For 20911/20916 co-relation queries the response was YES. [2024-06-21 21:29:24,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17587 conditions, 3928 events. 2651/3928 cut-off events. For 20911/20916 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 19362 event pairs, 599 based on Foata normal form. 38/3962 useless extension candidates. Maximal degree in co-relation 17551. Up to 2554 conditions per place. [2024-06-21 21:29:24,452 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 90 selfloop transitions, 76 changer transitions 0/170 dead transitions. [2024-06-21 21:29:24,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 170 transitions, 1486 flow [2024-06-21 21:29:24,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:29:24,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:29:24,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-21 21:29:24,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-21 21:29:24,454 INFO L175 Difference]: Start difference. First operand has 80 places, 102 transitions, 776 flow. Second operand 9 states and 171 transitions. [2024-06-21 21:29:24,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 170 transitions, 1486 flow [2024-06-21 21:29:24,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 170 transitions, 1443 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-21 21:29:24,478 INFO L231 Difference]: Finished difference. Result has 89 places, 121 transitions, 1106 flow [2024-06-21 21:29:24,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=737, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1106, PETRI_PLACES=89, PETRI_TRANSITIONS=121} [2024-06-21 21:29:24,478 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 46 predicate places. [2024-06-21 21:29:24,479 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 121 transitions, 1106 flow [2024-06-21 21:29:24,479 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) [2024-06-21 21:29:24,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:29:24,479 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:29:24,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 21:29:24,479 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)] === [2024-06-21 21:29:24,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:29:24,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1891582865, now seen corresponding path program 3 times [2024-06-21 21:29:24,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:29:24,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493869119] [2024-06-21 21:29:24,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:29:24,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:29:24,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:29:26,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:29:26,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:29:26,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493869119] [2024-06-21 21:29:26,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493869119] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:29:26,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:29:26,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:29:26,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474561768] [2024-06-21 21:29:26,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:29:26,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:29:26,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:29:26,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:29:26,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:29:26,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:29:26,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 121 transitions, 1106 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) [2024-06-21 21:29:26,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:29:26,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:29:26,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:29:28,060 INFO L124 PetriNetUnfolderBase]: 2679/3984 cut-off events. [2024-06-21 21:29:28,060 INFO L125 PetriNetUnfolderBase]: For 27495/27497 co-relation queries the response was YES. [2024-06-21 21:29:28,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20278 conditions, 3984 events. 2679/3984 cut-off events. For 27495/27497 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 19765 event pairs, 682 based on Foata normal form. 18/3988 useless extension candidates. Maximal degree in co-relation 20238. Up to 3501 conditions per place. [2024-06-21 21:29:28,084 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 113 selfloop transitions, 52 changer transitions 0/169 dead transitions. [2024-06-21 21:29:28,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 169 transitions, 1720 flow [2024-06-21 21:29:28,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:29:28,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:29:28,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-21 21:29:28,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-21 21:29:28,086 INFO L175 Difference]: Start difference. First operand has 89 places, 121 transitions, 1106 flow. Second operand 8 states and 142 transitions. [2024-06-21 21:29:28,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 169 transitions, 1720 flow [2024-06-21 21:29:28,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 169 transitions, 1593 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-21 21:29:28,128 INFO L231 Difference]: Finished difference. Result has 93 places, 135 transitions, 1265 flow [2024-06-21 21:29:28,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=989, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1265, PETRI_PLACES=93, PETRI_TRANSITIONS=135} [2024-06-21 21:29:28,129 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 50 predicate places. [2024-06-21 21:29:28,129 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 135 transitions, 1265 flow [2024-06-21 21:29:28,129 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) [2024-06-21 21:29:28,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:29:28,130 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:29:28,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 21:29:28,130 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)] === [2024-06-21 21:29:28,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:29:28,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1747263039, now seen corresponding path program 4 times [2024-06-21 21:29:28,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:29:28,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516745337] [2024-06-21 21:29:28,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:29:28,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:29:28,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:29:30,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:29:30,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:29:30,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516745337] [2024-06-21 21:29:30,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516745337] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:29:30,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:29:30,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:29:30,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320575614] [2024-06-21 21:29:30,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:29:30,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:29:30,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:29:30,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:29:30,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:29:30,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:29:30,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 135 transitions, 1265 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) [2024-06-21 21:29:30,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:29:30,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:29:30,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:29:31,787 INFO L124 PetriNetUnfolderBase]: 2669/3952 cut-off events. [2024-06-21 21:29:31,787 INFO L125 PetriNetUnfolderBase]: For 30861/30863 co-relation queries the response was YES. [2024-06-21 21:29:31,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20240 conditions, 3952 events. 2669/3952 cut-off events. For 30861/30863 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 19281 event pairs, 680 based on Foata normal form. 4/3938 useless extension candidates. Maximal degree in co-relation 20198. Up to 3377 conditions per place. [2024-06-21 21:29:31,809 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 149 selfloop transitions, 55 changer transitions 0/208 dead transitions. [2024-06-21 21:29:31,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 208 transitions, 2261 flow [2024-06-21 21:29:31,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:29:31,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:29:31,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-21 21:29:31,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43537414965986393 [2024-06-21 21:29:31,812 INFO L175 Difference]: Start difference. First operand has 93 places, 135 transitions, 1265 flow. Second operand 7 states and 128 transitions. [2024-06-21 21:29:31,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 208 transitions, 2261 flow [2024-06-21 21:29:31,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 208 transitions, 2080 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-21 21:29:31,848 INFO L231 Difference]: Finished difference. Result has 98 places, 174 transitions, 1759 flow [2024-06-21 21:29:31,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1144, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1759, PETRI_PLACES=98, PETRI_TRANSITIONS=174} [2024-06-21 21:29:31,849 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 55 predicate places. [2024-06-21 21:29:31,849 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 174 transitions, 1759 flow [2024-06-21 21:29:31,849 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) [2024-06-21 21:29:31,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:29:31,850 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:29:31,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 21:29:31,850 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)] === [2024-06-21 21:29:31,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:29:31,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1691811885, now seen corresponding path program 1 times [2024-06-21 21:29:31,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:29:31,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446865532] [2024-06-21 21:29:31,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:29:31,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:29:31,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:29:34,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:29:34,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:29:34,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446865532] [2024-06-21 21:29:34,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446865532] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:29:34,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:29:34,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:29:34,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71427338] [2024-06-21 21:29:34,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:29:34,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:29:34,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:29:34,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:29:34,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:29:34,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:29:34,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 174 transitions, 1759 flow. Second operand has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:29:34,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:29:34,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:29:34,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:29:35,369 INFO L124 PetriNetUnfolderBase]: 2661/3958 cut-off events. [2024-06-21 21:29:35,369 INFO L125 PetriNetUnfolderBase]: For 32599/32601 co-relation queries the response was YES. [2024-06-21 21:29:35,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20937 conditions, 3958 events. 2661/3958 cut-off events. For 32599/32601 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 19466 event pairs, 784 based on Foata normal form. 4/3959 useless extension candidates. Maximal degree in co-relation 20891. Up to 3825 conditions per place. [2024-06-21 21:29:35,395 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 185 selfloop transitions, 13 changer transitions 0/202 dead transitions. [2024-06-21 21:29:35,396 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 202 transitions, 2255 flow [2024-06-21 21:29:35,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:29:35,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:29:35,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-21 21:29:35,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-21 21:29:35,397 INFO L175 Difference]: Start difference. First operand has 98 places, 174 transitions, 1759 flow. Second operand 7 states and 116 transitions. [2024-06-21 21:29:35,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 202 transitions, 2255 flow [2024-06-21 21:29:35,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 202 transitions, 2225 flow, removed 14 selfloop flow, removed 1 redundant places. [2024-06-21 21:29:35,445 INFO L231 Difference]: Finished difference. Result has 104 places, 176 transitions, 1786 flow [2024-06-21 21:29:35,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1731, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1786, PETRI_PLACES=104, PETRI_TRANSITIONS=176} [2024-06-21 21:29:35,446 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 61 predicate places. [2024-06-21 21:29:35,446 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 176 transitions, 1786 flow [2024-06-21 21:29:35,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:29:35,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:29:35,446 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:29:35,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 21:29:35,447 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:29:35,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:29:35,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1056651426, now seen corresponding path program 1 times [2024-06-21 21:29:35,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:29:35,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056542381] [2024-06-21 21:29:35,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:29:35,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:29:35,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:29:37,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:29:37,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:29:37,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056542381] [2024-06-21 21:29:37,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056542381] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:29:37,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:29:37,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:29:37,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873133124] [2024-06-21 21:29:37,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:29:37,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:29:37,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:29:37,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:29:37,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:29:37,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:29:37,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 176 transitions, 1786 flow. Second operand has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:29:37,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:29:37,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:29:37,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:29:39,158 INFO L124 PetriNetUnfolderBase]: 2853/4273 cut-off events. [2024-06-21 21:29:39,158 INFO L125 PetriNetUnfolderBase]: For 39054/39063 co-relation queries the response was YES. [2024-06-21 21:29:39,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22827 conditions, 4273 events. 2853/4273 cut-off events. For 39054/39063 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 21764 event pairs, 611 based on Foata normal form. 26/4295 useless extension candidates. Maximal degree in co-relation 22778. Up to 2695 conditions per place. [2024-06-21 21:29:39,185 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 108 selfloop transitions, 125 changer transitions 0/237 dead transitions. [2024-06-21 21:29:39,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 237 transitions, 2717 flow [2024-06-21 21:29:39,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:29:39,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:29:39,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-21 21:29:39,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-21 21:29:39,187 INFO L175 Difference]: Start difference. First operand has 104 places, 176 transitions, 1786 flow. Second operand 8 states and 152 transitions. [2024-06-21 21:29:39,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 237 transitions, 2717 flow [2024-06-21 21:29:39,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 237 transitions, 2682 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-21 21:29:39,238 INFO L231 Difference]: Finished difference. Result has 108 places, 197 transitions, 2315 flow [2024-06-21 21:29:39,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1751, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2315, PETRI_PLACES=108, PETRI_TRANSITIONS=197} [2024-06-21 21:29:39,238 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 65 predicate places. [2024-06-21 21:29:39,238 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 197 transitions, 2315 flow [2024-06-21 21:29:39,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:29:39,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:29:39,239 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:29:39,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 21:29:39,239 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)] === [2024-06-21 21:29:39,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:29:39,239 INFO L85 PathProgramCache]: Analyzing trace with hash 699626394, now seen corresponding path program 2 times [2024-06-21 21:29:39,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:29:39,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366706785] [2024-06-21 21:29:39,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:29:39,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:29:39,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:29:41,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:29:41,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:29:41,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366706785] [2024-06-21 21:29:41,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366706785] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:29:41,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:29:41,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:29:41,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473687432] [2024-06-21 21:29:41,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:29:41,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:29:41,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:29:41,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:29:41,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:29:41,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:29:41,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 197 transitions, 2315 flow. Second operand has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:29:41,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:29:41,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:29:41,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:29:42,975 INFO L124 PetriNetUnfolderBase]: 2813/4232 cut-off events. [2024-06-21 21:29:42,975 INFO L125 PetriNetUnfolderBase]: For 45759/45772 co-relation queries the response was YES. [2024-06-21 21:29:42,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24202 conditions, 4232 events. 2813/4232 cut-off events. For 45759/45772 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 21647 event pairs, 682 based on Foata normal form. 32/4260 useless extension candidates. Maximal degree in co-relation 24151. Up to 2673 conditions per place. [2024-06-21 21:29:43,003 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 115 selfloop transitions, 137 changer transitions 0/256 dead transitions. [2024-06-21 21:29:43,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 256 transitions, 3137 flow [2024-06-21 21:29:43,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:29:43,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:29:43,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-21 21:29:43,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47354497354497355 [2024-06-21 21:29:43,004 INFO L175 Difference]: Start difference. First operand has 108 places, 197 transitions, 2315 flow. Second operand 9 states and 179 transitions. [2024-06-21 21:29:43,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 256 transitions, 3137 flow [2024-06-21 21:29:43,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 256 transitions, 3005 flow, removed 43 selfloop flow, removed 3 redundant places. [2024-06-21 21:29:43,091 INFO L231 Difference]: Finished difference. Result has 116 places, 202 transitions, 2659 flow [2024-06-21 21:29:43,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2183, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2659, PETRI_PLACES=116, PETRI_TRANSITIONS=202} [2024-06-21 21:29:43,092 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 73 predicate places. [2024-06-21 21:29:43,092 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 202 transitions, 2659 flow [2024-06-21 21:29:43,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:29:43,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:29:43,092 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:29:43,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 21:29:43,092 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)] === [2024-06-21 21:29:43,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:29:43,093 INFO L85 PathProgramCache]: Analyzing trace with hash -910769528, now seen corresponding path program 3 times [2024-06-21 21:29:43,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:29:43,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50276488] [2024-06-21 21:29:43,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:29:43,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:29:43,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:29:45,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:29:45,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:29:45,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50276488] [2024-06-21 21:29:45,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50276488] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:29:45,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:29:45,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:29:45,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509614382] [2024-06-21 21:29:45,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:29:45,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:29:45,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:29:45,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:29:45,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:29:45,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:29:45,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 202 transitions, 2659 flow. Second operand has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:29:45,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:29:45,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:29:45,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:29:46,862 INFO L124 PetriNetUnfolderBase]: 2803/4206 cut-off events. [2024-06-21 21:29:46,862 INFO L125 PetriNetUnfolderBase]: For 51436/51458 co-relation queries the response was YES. [2024-06-21 21:29:46,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26174 conditions, 4206 events. 2803/4206 cut-off events. For 51436/51458 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 21244 event pairs, 712 based on Foata normal form. 13/4200 useless extension candidates. Maximal degree in co-relation 26119. Up to 3557 conditions per place. [2024-06-21 21:29:46,888 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 176 selfloop transitions, 53 changer transitions 0/233 dead transitions. [2024-06-21 21:29:46,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 233 transitions, 3252 flow [2024-06-21 21:29:46,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:29:46,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:29:46,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-21 21:29:46,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41836734693877553 [2024-06-21 21:29:46,890 INFO L175 Difference]: Start difference. First operand has 116 places, 202 transitions, 2659 flow. Second operand 7 states and 123 transitions. [2024-06-21 21:29:46,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 233 transitions, 3252 flow [2024-06-21 21:29:46,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 233 transitions, 2979 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-21 21:29:46,969 INFO L231 Difference]: Finished difference. Result has 117 places, 205 transitions, 2569 flow [2024-06-21 21:29:46,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2394, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2569, PETRI_PLACES=117, PETRI_TRANSITIONS=205} [2024-06-21 21:29:46,970 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 74 predicate places. [2024-06-21 21:29:46,970 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 205 transitions, 2569 flow [2024-06-21 21:29:46,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:29:46,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:29:46,970 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:29:46,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 21:29:46,971 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)] === [2024-06-21 21:29:46,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:29:46,971 INFO L85 PathProgramCache]: Analyzing trace with hash 364316010, now seen corresponding path program 1 times [2024-06-21 21:29:46,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:29:46,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883881053] [2024-06-21 21:29:46,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:29:46,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:29:46,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:29:49,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:29:49,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:29:49,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883881053] [2024-06-21 21:29:49,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883881053] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:29:49,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:29:49,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:29:49,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407799385] [2024-06-21 21:29:49,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:29:49,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:29:49,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:29:49,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:29:49,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:29:49,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:29:49,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 205 transitions, 2569 flow. Second operand has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:29:49,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:29:49,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:29:49,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:29:50,460 INFO L124 PetriNetUnfolderBase]: 2831/4251 cut-off events. [2024-06-21 21:29:50,460 INFO L125 PetriNetUnfolderBase]: For 53597/53606 co-relation queries the response was YES. [2024-06-21 21:29:50,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25918 conditions, 4251 events. 2831/4251 cut-off events. For 53597/53606 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 21713 event pairs, 571 based on Foata normal form. 12/4259 useless extension candidates. Maximal degree in co-relation 25862. Up to 3688 conditions per place. [2024-06-21 21:29:50,490 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 188 selfloop transitions, 50 changer transitions 0/242 dead transitions. [2024-06-21 21:29:50,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 242 transitions, 3281 flow [2024-06-21 21:29:50,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:29:50,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:29:50,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-21 21:29:50,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4387755102040816 [2024-06-21 21:29:50,492 INFO L175 Difference]: Start difference. First operand has 117 places, 205 transitions, 2569 flow. Second operand 7 states and 129 transitions. [2024-06-21 21:29:50,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 242 transitions, 3281 flow [2024-06-21 21:29:50,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 242 transitions, 3221 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-21 21:29:50,577 INFO L231 Difference]: Finished difference. Result has 121 places, 209 transitions, 2676 flow [2024-06-21 21:29:50,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2509, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2676, PETRI_PLACES=121, PETRI_TRANSITIONS=209} [2024-06-21 21:29:50,577 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 78 predicate places. [2024-06-21 21:29:50,577 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 209 transitions, 2676 flow [2024-06-21 21:29:50,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:29:50,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:29:50,578 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:29:50,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 21:29:50,578 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)] === [2024-06-21 21:29:50,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:29:50,578 INFO L85 PathProgramCache]: Analyzing trace with hash -740787372, now seen corresponding path program 2 times [2024-06-21 21:29:50,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:29:50,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58933661] [2024-06-21 21:29:50,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:29:50,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:29:50,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:29:53,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:29:53,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:29:53,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58933661] [2024-06-21 21:29:53,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58933661] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:29:53,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:29:53,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:29:53,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812485925] [2024-06-21 21:29:53,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:29:53,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:29:53,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:29:53,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:29:53,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:29:53,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:29:53,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 209 transitions, 2676 flow. Second operand has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:29:53,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:29:53,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:29:53,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:29:54,562 INFO L124 PetriNetUnfolderBase]: 2818/4225 cut-off events. [2024-06-21 21:29:54,563 INFO L125 PetriNetUnfolderBase]: For 58229/58234 co-relation queries the response was YES. [2024-06-21 21:29:54,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25999 conditions, 4225 events. 2818/4225 cut-off events. For 58229/58234 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 21392 event pairs, 746 based on Foata normal form. 8/4229 useless extension candidates. Maximal degree in co-relation 25941. Up to 3818 conditions per place. [2024-06-21 21:29:54,593 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 179 selfloop transitions, 57 changer transitions 0/240 dead transitions. [2024-06-21 21:29:54,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 240 transitions, 3263 flow [2024-06-21 21:29:54,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:29:54,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:29:54,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-21 21:29:54,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43197278911564624 [2024-06-21 21:29:54,595 INFO L175 Difference]: Start difference. First operand has 121 places, 209 transitions, 2676 flow. Second operand 7 states and 127 transitions. [2024-06-21 21:29:54,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 240 transitions, 3263 flow [2024-06-21 21:29:54,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 240 transitions, 3175 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-21 21:29:54,685 INFO L231 Difference]: Finished difference. Result has 125 places, 209 transitions, 2714 flow [2024-06-21 21:29:54,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2588, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2714, PETRI_PLACES=125, PETRI_TRANSITIONS=209} [2024-06-21 21:29:54,686 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 82 predicate places. [2024-06-21 21:29:54,686 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 209 transitions, 2714 flow [2024-06-21 21:29:54,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:29:54,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:29:54,687 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:29:54,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 21:29:54,687 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)] === [2024-06-21 21:29:54,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:29:54,687 INFO L85 PathProgramCache]: Analyzing trace with hash -622514994, now seen corresponding path program 1 times [2024-06-21 21:29:54,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:29:54,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084461275] [2024-06-21 21:29:54,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:29:54,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:29:54,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:29:57,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:29:57,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:29:57,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084461275] [2024-06-21 21:29:57,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084461275] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:29:57,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:29:57,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:29:57,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531753221] [2024-06-21 21:29:57,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:29:57,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:29:57,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:29:57,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:29:57,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:29:57,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:29:57,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 209 transitions, 2714 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:29:57,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:29:57,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:29:57,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:29:59,303 INFO L124 PetriNetUnfolderBase]: 3218/4883 cut-off events. [2024-06-21 21:29:59,303 INFO L125 PetriNetUnfolderBase]: For 79715/79720 co-relation queries the response was YES. [2024-06-21 21:29:59,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28755 conditions, 4883 events. 3218/4883 cut-off events. For 79715/79720 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 25963 event pairs, 698 based on Foata normal form. 94/4973 useless extension candidates. Maximal degree in co-relation 28695. Up to 2588 conditions per place. [2024-06-21 21:29:59,395 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 122 selfloop transitions, 143 changer transitions 0/269 dead transitions. [2024-06-21 21:29:59,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 269 transitions, 3551 flow [2024-06-21 21:29:59,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:29:59,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:29:59,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-21 21:29:59,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4595238095238095 [2024-06-21 21:29:59,397 INFO L175 Difference]: Start difference. First operand has 125 places, 209 transitions, 2714 flow. Second operand 10 states and 193 transitions. [2024-06-21 21:29:59,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 269 transitions, 3551 flow [2024-06-21 21:29:59,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 269 transitions, 3426 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 21:29:59,485 INFO L231 Difference]: Finished difference. Result has 129 places, 212 transitions, 2951 flow [2024-06-21 21:29:59,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2589, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2951, PETRI_PLACES=129, PETRI_TRANSITIONS=212} [2024-06-21 21:29:59,485 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 86 predicate places. [2024-06-21 21:29:59,486 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 212 transitions, 2951 flow [2024-06-21 21:29:59,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:29:59,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:29:59,486 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:29:59,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 21:29:59,486 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)] === [2024-06-21 21:29:59,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:29:59,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1830923978, now seen corresponding path program 2 times [2024-06-21 21:29:59,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:29:59,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334018262] [2024-06-21 21:29:59,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:29:59,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:29:59,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:30:02,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:30:02,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:30:02,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334018262] [2024-06-21 21:30:02,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334018262] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:30:02,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:30:02,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:30:02,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924919593] [2024-06-21 21:30:02,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:30:02,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:30:02,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:30:02,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:30:02,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:30:02,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:30:02,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 212 transitions, 2951 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) [2024-06-21 21:30:02,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:30:02,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:30:02,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:30:04,191 INFO L124 PetriNetUnfolderBase]: 3238/4909 cut-off events. [2024-06-21 21:30:04,192 INFO L125 PetriNetUnfolderBase]: For 75084/75086 co-relation queries the response was YES. [2024-06-21 21:30:04,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30464 conditions, 4909 events. 3238/4909 cut-off events. For 75084/75086 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 25859 event pairs, 856 based on Foata normal form. 4/4893 useless extension candidates. Maximal degree in co-relation 30403. Up to 4256 conditions per place. [2024-06-21 21:30:04,229 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 182 selfloop transitions, 64 changer transitions 0/250 dead transitions. [2024-06-21 21:30:04,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 250 transitions, 3593 flow [2024-06-21 21:30:04,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:30:04,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:30:04,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-21 21:30:04,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-21 21:30:04,231 INFO L175 Difference]: Start difference. First operand has 129 places, 212 transitions, 2951 flow. Second operand 8 states and 141 transitions. [2024-06-21 21:30:04,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 250 transitions, 3593 flow [2024-06-21 21:30:04,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 250 transitions, 3289 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-21 21:30:04,359 INFO L231 Difference]: Finished difference. Result has 129 places, 214 transitions, 2818 flow [2024-06-21 21:30:04,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2647, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2818, PETRI_PLACES=129, PETRI_TRANSITIONS=214} [2024-06-21 21:30:04,359 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 86 predicate places. [2024-06-21 21:30:04,359 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 214 transitions, 2818 flow [2024-06-21 21:30:04,359 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) [2024-06-21 21:30:04,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:30:04,360 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:30:04,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 21:30:04,360 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)] === [2024-06-21 21:30:04,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:30:04,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1961344084, now seen corresponding path program 3 times [2024-06-21 21:30:04,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:30:04,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418229037] [2024-06-21 21:30:04,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:30:04,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:30:04,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:30:07,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:30:07,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:30:07,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418229037] [2024-06-21 21:30:07,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418229037] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:30:07,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:30:07,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:30:07,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816002850] [2024-06-21 21:30:07,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:30:07,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:30:07,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:30:07,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:30:07,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:30:07,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:30:07,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 214 transitions, 2818 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) [2024-06-21 21:30:07,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:30:07,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:30:07,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:30:09,196 INFO L124 PetriNetUnfolderBase]: 3258/4945 cut-off events. [2024-06-21 21:30:09,196 INFO L125 PetriNetUnfolderBase]: For 75588/75590 co-relation queries the response was YES. [2024-06-21 21:30:09,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29851 conditions, 4945 events. 3258/4945 cut-off events. For 75588/75590 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 26102 event pairs, 811 based on Foata normal form. 4/4929 useless extension candidates. Maximal degree in co-relation 29789. Up to 3998 conditions per place. [2024-06-21 21:30:09,229 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 186 selfloop transitions, 71 changer transitions 0/261 dead transitions. [2024-06-21 21:30:09,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 261 transitions, 3630 flow [2024-06-21 21:30:09,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:30:09,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:30:09,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-21 21:30:09,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-21 21:30:09,230 INFO L175 Difference]: Start difference. First operand has 129 places, 214 transitions, 2818 flow. Second operand 8 states and 147 transitions. [2024-06-21 21:30:09,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 261 transitions, 3630 flow [2024-06-21 21:30:09,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 261 transitions, 3479 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-21 21:30:09,335 INFO L231 Difference]: Finished difference. Result has 132 places, 219 transitions, 2916 flow [2024-06-21 21:30:09,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2667, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2916, PETRI_PLACES=132, PETRI_TRANSITIONS=219} [2024-06-21 21:30:09,335 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 89 predicate places. [2024-06-21 21:30:09,336 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 219 transitions, 2916 flow [2024-06-21 21:30:09,336 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) [2024-06-21 21:30:09,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:30:09,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:30:09,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 21:30:09,336 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:30:09,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:30:09,336 INFO L85 PathProgramCache]: Analyzing trace with hash -15420350, now seen corresponding path program 4 times [2024-06-21 21:30:09,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:30:09,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843568782] [2024-06-21 21:30:09,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:30:09,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:30:09,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:30:12,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:30:12,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:30:12,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843568782] [2024-06-21 21:30:12,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843568782] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:30:12,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:30:12,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:30:12,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727228792] [2024-06-21 21:30:12,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:30:12,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:30:12,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:30:12,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:30:12,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:30:12,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:30:12,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 219 transitions, 2916 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) [2024-06-21 21:30:12,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:30:12,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:30:12,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:30:14,626 INFO L124 PetriNetUnfolderBase]: 3318/5057 cut-off events. [2024-06-21 21:30:14,627 INFO L125 PetriNetUnfolderBase]: For 85828/85830 co-relation queries the response was YES. [2024-06-21 21:30:14,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30855 conditions, 5057 events. 3318/5057 cut-off events. For 85828/85830 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 27090 event pairs, 889 based on Foata normal form. 18/5061 useless extension candidates. Maximal degree in co-relation 30791. Up to 4412 conditions per place. [2024-06-21 21:30:14,658 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 182 selfloop transitions, 78 changer transitions 0/264 dead transitions. [2024-06-21 21:30:14,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 264 transitions, 3665 flow [2024-06-21 21:30:14,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:30:14,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:30:14,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-21 21:30:14,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-21 21:30:14,660 INFO L175 Difference]: Start difference. First operand has 132 places, 219 transitions, 2916 flow. Second operand 9 states and 163 transitions. [2024-06-21 21:30:14,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 264 transitions, 3665 flow [2024-06-21 21:30:14,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 264 transitions, 3536 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-21 21:30:14,788 INFO L231 Difference]: Finished difference. Result has 137 places, 221 transitions, 3006 flow [2024-06-21 21:30:14,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2788, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3006, PETRI_PLACES=137, PETRI_TRANSITIONS=221} [2024-06-21 21:30:14,789 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 94 predicate places. [2024-06-21 21:30:14,789 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 221 transitions, 3006 flow [2024-06-21 21:30:14,789 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) [2024-06-21 21:30:14,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:30:14,789 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:30:14,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 21:30:14,789 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:30:14,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:30:14,789 INFO L85 PathProgramCache]: Analyzing trace with hash 496899281, now seen corresponding path program 1 times [2024-06-21 21:30:14,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:30:14,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445568448] [2024-06-21 21:30:14,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:30:14,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:30:14,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:30:16,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:30:16,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:30:16,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445568448] [2024-06-21 21:30:16,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445568448] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:30:16,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:30:16,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:30:16,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318568315] [2024-06-21 21:30:16,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:30:16,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:30:16,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:30:16,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:30:16,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:30:16,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:30:16,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 221 transitions, 3006 flow. Second operand has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:16,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:30:16,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:30:16,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:30:18,003 INFO L124 PetriNetUnfolderBase]: 3312/5049 cut-off events. [2024-06-21 21:30:18,003 INFO L125 PetriNetUnfolderBase]: For 85805/85807 co-relation queries the response was YES. [2024-06-21 21:30:18,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31318 conditions, 5049 events. 3312/5049 cut-off events. For 85805/85807 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 27074 event pairs, 1028 based on Foata normal form. 2/5048 useless extension candidates. Maximal degree in co-relation 31252. Up to 4918 conditions per place. [2024-06-21 21:30:18,042 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 221 selfloop transitions, 10 changer transitions 0/235 dead transitions. [2024-06-21 21:30:18,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 235 transitions, 3528 flow [2024-06-21 21:30:18,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 21:30:18,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 21:30:18,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 82 transitions. [2024-06-21 21:30:18,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3904761904761905 [2024-06-21 21:30:18,043 INFO L175 Difference]: Start difference. First operand has 137 places, 221 transitions, 3006 flow. Second operand 5 states and 82 transitions. [2024-06-21 21:30:18,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 235 transitions, 3528 flow [2024-06-21 21:30:18,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 235 transitions, 3334 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-21 21:30:18,233 INFO L231 Difference]: Finished difference. Result has 135 places, 224 transitions, 2872 flow [2024-06-21 21:30:18,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2812, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2872, PETRI_PLACES=135, PETRI_TRANSITIONS=224} [2024-06-21 21:30:18,234 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 92 predicate places. [2024-06-21 21:30:18,234 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 224 transitions, 2872 flow [2024-06-21 21:30:18,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:18,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:30:18,234 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:30:18,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 21:30:18,234 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)] === [2024-06-21 21:30:18,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:30:18,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1491444517, now seen corresponding path program 1 times [2024-06-21 21:30:18,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:30:18,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546752094] [2024-06-21 21:30:18,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:30:18,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:30:18,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:30:20,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:30:20,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:30:20,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546752094] [2024-06-21 21:30:20,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546752094] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:30:20,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:30:20,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:30:20,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783125771] [2024-06-21 21:30:20,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:30:20,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:30:20,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:30:20,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:30:20,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:30:20,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:30:20,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 224 transitions, 2872 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:20,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:30:20,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:30:20,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:30:22,896 INFO L124 PetriNetUnfolderBase]: 4507/6939 cut-off events. [2024-06-21 21:30:22,896 INFO L125 PetriNetUnfolderBase]: For 156086/156095 co-relation queries the response was YES. [2024-06-21 21:30:22,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41655 conditions, 6939 events. 4507/6939 cut-off events. For 156086/156095 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 40255 event pairs, 919 based on Foata normal form. 78/7013 useless extension candidates. Maximal degree in co-relation 41588. Up to 2587 conditions per place. [2024-06-21 21:30:22,946 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 179 selfloop transitions, 126 changer transitions 0/309 dead transitions. [2024-06-21 21:30:22,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 309 transitions, 4142 flow [2024-06-21 21:30:22,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:30:22,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:30:22,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 192 transitions. [2024-06-21 21:30:22,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5079365079365079 [2024-06-21 21:30:22,948 INFO L175 Difference]: Start difference. First operand has 135 places, 224 transitions, 2872 flow. Second operand 9 states and 192 transitions. [2024-06-21 21:30:22,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 309 transitions, 4142 flow [2024-06-21 21:30:23,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 309 transitions, 4104 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-21 21:30:23,112 INFO L231 Difference]: Finished difference. Result has 143 places, 234 transitions, 3362 flow [2024-06-21 21:30:23,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2834, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3362, PETRI_PLACES=143, PETRI_TRANSITIONS=234} [2024-06-21 21:30:23,112 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 100 predicate places. [2024-06-21 21:30:23,112 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 234 transitions, 3362 flow [2024-06-21 21:30:23,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:23,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:30:23,113 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:30:23,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 21:30:23,113 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)] === [2024-06-21 21:30:23,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:30:23,113 INFO L85 PathProgramCache]: Analyzing trace with hash -1836447209, now seen corresponding path program 2 times [2024-06-21 21:30:23,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:30:23,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733118035] [2024-06-21 21:30:23,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:30:23,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:30:23,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:30:25,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:30:25,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:30:25,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733118035] [2024-06-21 21:30:25,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733118035] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:30:25,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:30:25,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:30:25,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640753478] [2024-06-21 21:30:25,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:30:25,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:30:25,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:30:25,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:30:25,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:30:25,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:30:25,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 234 transitions, 3362 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:25,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:30:25,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:30:25,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:30:28,283 INFO L124 PetriNetUnfolderBase]: 5183/8024 cut-off events. [2024-06-21 21:30:28,283 INFO L125 PetriNetUnfolderBase]: For 207673/207678 co-relation queries the response was YES. [2024-06-21 21:30:28,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49777 conditions, 8024 events. 5183/8024 cut-off events. For 207673/207678 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 48350 event pairs, 1487 based on Foata normal form. 74/8094 useless extension candidates. Maximal degree in co-relation 49707. Up to 4493 conditions per place. [2024-06-21 21:30:28,350 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 160 selfloop transitions, 146 changer transitions 0/310 dead transitions. [2024-06-21 21:30:28,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 310 transitions, 4502 flow [2024-06-21 21:30:28,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:30:28,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:30:28,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 204 transitions. [2024-06-21 21:30:28,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4857142857142857 [2024-06-21 21:30:28,352 INFO L175 Difference]: Start difference. First operand has 143 places, 234 transitions, 3362 flow. Second operand 10 states and 204 transitions. [2024-06-21 21:30:28,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 310 transitions, 4502 flow [2024-06-21 21:30:28,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 310 transitions, 4280 flow, removed 40 selfloop flow, removed 4 redundant places. [2024-06-21 21:30:28,702 INFO L231 Difference]: Finished difference. Result has 150 places, 241 transitions, 3632 flow [2024-06-21 21:30:28,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3144, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3632, PETRI_PLACES=150, PETRI_TRANSITIONS=241} [2024-06-21 21:30:28,703 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 107 predicate places. [2024-06-21 21:30:28,703 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 241 transitions, 3632 flow [2024-06-21 21:30:28,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:28,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:30:28,703 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:30:28,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 21:30:28,703 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)] === [2024-06-21 21:30:28,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:30:28,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1260753127, now seen corresponding path program 3 times [2024-06-21 21:30:28,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:30:28,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367866756] [2024-06-21 21:30:28,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:30:28,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:30:28,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:30:31,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:30:31,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:30:31,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367866756] [2024-06-21 21:30:31,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367866756] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:30:31,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:30:31,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:30:31,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537890220] [2024-06-21 21:30:31,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:30:31,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:30:31,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:30:31,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:30:31,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:30:31,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:30:31,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 241 transitions, 3632 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:31,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:30:31,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:30:31,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:30:34,644 INFO L124 PetriNetUnfolderBase]: 5792/9076 cut-off events. [2024-06-21 21:30:34,644 INFO L125 PetriNetUnfolderBase]: For 246530/246543 co-relation queries the response was YES. [2024-06-21 21:30:34,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56663 conditions, 9076 events. 5792/9076 cut-off events. For 246530/246543 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 57276 event pairs, 1642 based on Foata normal form. 76/9148 useless extension candidates. Maximal degree in co-relation 56590. Up to 5897 conditions per place. [2024-06-21 21:30:34,715 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 174 selfloop transitions, 144 changer transitions 0/322 dead transitions. [2024-06-21 21:30:34,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 322 transitions, 4856 flow [2024-06-21 21:30:34,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:30:34,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:30:34,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 208 transitions. [2024-06-21 21:30:34,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49523809523809526 [2024-06-21 21:30:34,718 INFO L175 Difference]: Start difference. First operand has 150 places, 241 transitions, 3632 flow. Second operand 10 states and 208 transitions. [2024-06-21 21:30:34,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 322 transitions, 4856 flow [2024-06-21 21:30:35,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 322 transitions, 4524 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-06-21 21:30:35,068 INFO L231 Difference]: Finished difference. Result has 154 places, 247 transitions, 3749 flow [2024-06-21 21:30:35,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3300, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3749, PETRI_PLACES=154, PETRI_TRANSITIONS=247} [2024-06-21 21:30:35,068 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 111 predicate places. [2024-06-21 21:30:35,068 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 247 transitions, 3749 flow [2024-06-21 21:30:35,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:35,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:30:35,068 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:30:35,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 21:30:35,069 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)] === [2024-06-21 21:30:35,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:30:35,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1829781121, now seen corresponding path program 4 times [2024-06-21 21:30:35,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:30:35,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76470093] [2024-06-21 21:30:35,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:30:35,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:30:35,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:30:37,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:30:37,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:30:37,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76470093] [2024-06-21 21:30:37,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76470093] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:30:37,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:30:37,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:30:37,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156164180] [2024-06-21 21:30:37,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:30:37,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:30:37,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:30:37,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:30:37,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:30:37,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:30:37,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 247 transitions, 3749 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:37,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:30:37,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:30:37,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:30:40,158 INFO L124 PetriNetUnfolderBase]: 6104/9589 cut-off events. [2024-06-21 21:30:40,158 INFO L125 PetriNetUnfolderBase]: For 262956/262965 co-relation queries the response was YES. [2024-06-21 21:30:40,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58822 conditions, 9589 events. 6104/9589 cut-off events. For 262956/262965 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 61440 event pairs, 2125 based on Foata normal form. 80/9665 useless extension candidates. Maximal degree in co-relation 58747. Up to 7436 conditions per place. [2024-06-21 21:30:40,241 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 163 selfloop transitions, 131 changer transitions 0/298 dead transitions. [2024-06-21 21:30:40,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 298 transitions, 4597 flow [2024-06-21 21:30:40,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:30:40,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:30:40,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-21 21:30:40,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455026455026455 [2024-06-21 21:30:40,242 INFO L175 Difference]: Start difference. First operand has 154 places, 247 transitions, 3749 flow. Second operand 9 states and 172 transitions. [2024-06-21 21:30:40,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 298 transitions, 4597 flow [2024-06-21 21:30:40,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 298 transitions, 4357 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-21 21:30:40,660 INFO L231 Difference]: Finished difference. Result has 157 places, 249 transitions, 3845 flow [2024-06-21 21:30:40,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3513, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3845, PETRI_PLACES=157, PETRI_TRANSITIONS=249} [2024-06-21 21:30:40,661 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 114 predicate places. [2024-06-21 21:30:40,661 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 249 transitions, 3845 flow [2024-06-21 21:30:40,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:40,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:30:40,661 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:30:40,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 21:30:40,661 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)] === [2024-06-21 21:30:40,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:30:40,661 INFO L85 PathProgramCache]: Analyzing trace with hash -2123816063, now seen corresponding path program 5 times [2024-06-21 21:30:40,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:30:40,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818655032] [2024-06-21 21:30:40,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:30:40,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:30:40,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:30:43,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:30:43,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:30:43,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818655032] [2024-06-21 21:30:43,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818655032] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:30:43,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:30:43,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:30:43,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808986894] [2024-06-21 21:30:43,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:30:43,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:30:43,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:30:43,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:30:43,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:30:43,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:30:43,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 249 transitions, 3845 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:43,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:30:43,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:30:43,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:30:45,837 INFO L124 PetriNetUnfolderBase]: 6233/9831 cut-off events. [2024-06-21 21:30:45,838 INFO L125 PetriNetUnfolderBase]: For 266144/266157 co-relation queries the response was YES. [2024-06-21 21:30:45,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59405 conditions, 9831 events. 6233/9831 cut-off events. For 266144/266157 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 63655 event pairs, 2316 based on Foata normal form. 86/9913 useless extension candidates. Maximal degree in co-relation 59328. Up to 7667 conditions per place. [2024-06-21 21:30:45,914 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 172 selfloop transitions, 141 changer transitions 0/317 dead transitions. [2024-06-21 21:30:45,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 317 transitions, 4857 flow [2024-06-21 21:30:45,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:30:45,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:30:45,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 201 transitions. [2024-06-21 21:30:45,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4785714285714286 [2024-06-21 21:30:45,916 INFO L175 Difference]: Start difference. First operand has 157 places, 249 transitions, 3845 flow. Second operand 10 states and 201 transitions. [2024-06-21 21:30:45,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 317 transitions, 4857 flow [2024-06-21 21:30:46,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 317 transitions, 4573 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-21 21:30:46,295 INFO L231 Difference]: Finished difference. Result has 160 places, 251 transitions, 3917 flow [2024-06-21 21:30:46,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3561, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3917, PETRI_PLACES=160, PETRI_TRANSITIONS=251} [2024-06-21 21:30:46,296 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 117 predicate places. [2024-06-21 21:30:46,296 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 251 transitions, 3917 flow [2024-06-21 21:30:46,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:46,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:30:46,296 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:30:46,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 21:30:46,297 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)] === [2024-06-21 21:30:46,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:30:46,297 INFO L85 PathProgramCache]: Analyzing trace with hash -2118094331, now seen corresponding path program 1 times [2024-06-21 21:30:46,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:30:46,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347157346] [2024-06-21 21:30:46,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:30:46,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:30:46,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:30:49,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:30:49,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:30:49,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347157346] [2024-06-21 21:30:49,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347157346] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:30:49,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:30:49,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:30:49,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755359752] [2024-06-21 21:30:49,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:30:49,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:30:49,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:30:49,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:30:49,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:30:49,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:30:49,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 251 transitions, 3917 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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) [2024-06-21 21:30:49,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:30:49,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:30:49,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:30:52,063 INFO L124 PetriNetUnfolderBase]: 6344/10069 cut-off events. [2024-06-21 21:30:52,063 INFO L125 PetriNetUnfolderBase]: For 266789/266798 co-relation queries the response was YES. [2024-06-21 21:30:52,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59831 conditions, 10069 events. 6344/10069 cut-off events. For 266789/266798 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 65980 event pairs, 2068 based on Foata normal form. 60/10125 useless extension candidates. Maximal degree in co-relation 59753. Up to 5962 conditions per place. [2024-06-21 21:30:52,143 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 165 selfloop transitions, 137 changer transitions 0/306 dead transitions. [2024-06-21 21:30:52,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 306 transitions, 4787 flow [2024-06-21 21:30:52,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:30:52,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:30:52,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-21 21:30:52,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4656084656084656 [2024-06-21 21:30:52,144 INFO L175 Difference]: Start difference. First operand has 160 places, 251 transitions, 3917 flow. Second operand 9 states and 176 transitions. [2024-06-21 21:30:52,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 306 transitions, 4787 flow [2024-06-21 21:30:52,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 306 transitions, 4479 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-21 21:30:52,525 INFO L231 Difference]: Finished difference. Result has 161 places, 252 transitions, 3929 flow [2024-06-21 21:30:52,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3609, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3929, PETRI_PLACES=161, PETRI_TRANSITIONS=252} [2024-06-21 21:30:52,525 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 118 predicate places. [2024-06-21 21:30:52,526 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 252 transitions, 3929 flow [2024-06-21 21:30:52,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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) [2024-06-21 21:30:52,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:30:52,526 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:30:52,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 21:30:52,526 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)] === [2024-06-21 21:30:52,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:30:52,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1725910481, now seen corresponding path program 6 times [2024-06-21 21:30:52,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:30:52,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584464811] [2024-06-21 21:30:52,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:30:52,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:30:52,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:30:55,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:30:55,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:30:55,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584464811] [2024-06-21 21:30:55,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584464811] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:30:55,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:30:55,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:30:55,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533738821] [2024-06-21 21:30:55,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:30:55,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:30:55,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:30:55,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:30:55,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:30:55,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:30:55,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 252 transitions, 3929 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:55,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:30:55,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:30:55,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:30:57,943 INFO L124 PetriNetUnfolderBase]: 6376/10140 cut-off events. [2024-06-21 21:30:57,943 INFO L125 PetriNetUnfolderBase]: For 260390/260412 co-relation queries the response was YES. [2024-06-21 21:30:57,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60113 conditions, 10140 events. 6376/10140 cut-off events. For 260390/260412 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 66734 event pairs, 2659 based on Foata normal form. 29/10150 useless extension candidates. Maximal degree in co-relation 60034. Up to 9260 conditions per place. [2024-06-21 21:30:58,011 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 233 selfloop transitions, 54 changer transitions 0/291 dead transitions. [2024-06-21 21:30:58,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 291 transitions, 4649 flow [2024-06-21 21:30:58,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:30:58,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:30:58,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-21 21:30:58,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-21 21:30:58,013 INFO L175 Difference]: Start difference. First operand has 161 places, 252 transitions, 3929 flow. Second operand 8 states and 141 transitions. [2024-06-21 21:30:58,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 291 transitions, 4649 flow [2024-06-21 21:30:58,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 291 transitions, 4275 flow, removed 22 selfloop flow, removed 8 redundant places. [2024-06-21 21:30:58,390 INFO L231 Difference]: Finished difference. Result has 161 places, 253 transitions, 3692 flow [2024-06-21 21:30:58,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3555, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3692, PETRI_PLACES=161, PETRI_TRANSITIONS=253} [2024-06-21 21:30:58,390 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 118 predicate places. [2024-06-21 21:30:58,390 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 253 transitions, 3692 flow [2024-06-21 21:30:58,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:58,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:30:58,391 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:30:58,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 21:30:58,391 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)] === [2024-06-21 21:30:58,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:30:58,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1180570279, now seen corresponding path program 2 times [2024-06-21 21:30:58,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:30:58,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512495679] [2024-06-21 21:30:58,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:30:58,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:30:58,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:31:01,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:31:01,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:31:01,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512495679] [2024-06-21 21:31:01,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512495679] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:31:01,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:31:01,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:31:01,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428743425] [2024-06-21 21:31:01,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:31:01,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:31:01,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:31:01,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:31:01,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:31:01,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:31:01,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 253 transitions, 3692 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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) [2024-06-21 21:31:01,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:31:01,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:31:01,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:31:03,951 INFO L124 PetriNetUnfolderBase]: 6424/10236 cut-off events. [2024-06-21 21:31:03,951 INFO L125 PetriNetUnfolderBase]: For 265366/265388 co-relation queries the response was YES. [2024-06-21 21:31:04,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59317 conditions, 10236 events. 6424/10236 cut-off events. For 265366/265388 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 67760 event pairs, 2655 based on Foata normal form. 21/10238 useless extension candidates. Maximal degree in co-relation 59238. Up to 9238 conditions per place. [2024-06-21 21:31:04,168 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 234 selfloop transitions, 56 changer transitions 0/294 dead transitions. [2024-06-21 21:31:04,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 294 transitions, 4430 flow [2024-06-21 21:31:04,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:31:04,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:31:04,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-21 21:31:04,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-21 21:31:04,169 INFO L175 Difference]: Start difference. First operand has 161 places, 253 transitions, 3692 flow. Second operand 8 states and 143 transitions. [2024-06-21 21:31:04,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 294 transitions, 4430 flow [2024-06-21 21:31:04,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 294 transitions, 4311 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-21 21:31:04,559 INFO L231 Difference]: Finished difference. Result has 163 places, 254 transitions, 3715 flow [2024-06-21 21:31:04,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3573, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3715, PETRI_PLACES=163, PETRI_TRANSITIONS=254} [2024-06-21 21:31:04,560 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 120 predicate places. [2024-06-21 21:31:04,560 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 254 transitions, 3715 flow [2024-06-21 21:31:04,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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) [2024-06-21 21:31:04,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:31:04,560 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:31:04,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 21:31:04,560 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)] === [2024-06-21 21:31:04,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:31:04,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1189767049, now seen corresponding path program 3 times [2024-06-21 21:31:04,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:31:04,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333687255] [2024-06-21 21:31:04,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:31:04,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:31:04,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:31:07,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:31:07,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:31:07,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333687255] [2024-06-21 21:31:07,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333687255] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:31:07,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:31:07,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:31:07,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740367890] [2024-06-21 21:31:07,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:31:07,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:31:07,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:31:07,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:31:07,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:31:07,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:31:07,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 254 transitions, 3715 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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) [2024-06-21 21:31:07,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:31:07,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:31:07,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:31:10,219 INFO L124 PetriNetUnfolderBase]: 6404/10204 cut-off events. [2024-06-21 21:31:10,219 INFO L125 PetriNetUnfolderBase]: For 272939/272961 co-relation queries the response was YES. [2024-06-21 21:31:10,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59192 conditions, 10204 events. 6404/10204 cut-off events. For 272939/272961 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 67040 event pairs, 2596 based on Foata normal form. 21/10206 useless extension candidates. Maximal degree in co-relation 59112. Up to 8414 conditions per place. [2024-06-21 21:31:10,319 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 225 selfloop transitions, 64 changer transitions 0/293 dead transitions. [2024-06-21 21:31:10,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 293 transitions, 4367 flow [2024-06-21 21:31:10,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:31:10,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:31:10,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-21 21:31:10,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-21 21:31:10,321 INFO L175 Difference]: Start difference. First operand has 163 places, 254 transitions, 3715 flow. Second operand 8 states and 141 transitions. [2024-06-21 21:31:10,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 293 transitions, 4367 flow [2024-06-21 21:31:10,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 293 transitions, 4239 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-21 21:31:10,750 INFO L231 Difference]: Finished difference. Result has 164 places, 253 transitions, 3657 flow [2024-06-21 21:31:10,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3525, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3657, PETRI_PLACES=164, PETRI_TRANSITIONS=253} [2024-06-21 21:31:10,750 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 121 predicate places. [2024-06-21 21:31:10,751 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 253 transitions, 3657 flow [2024-06-21 21:31:10,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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) [2024-06-21 21:31:10,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:31:10,751 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:31:10,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 21:31:10,751 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:31:10,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:31:10,751 INFO L85 PathProgramCache]: Analyzing trace with hash -793081166, now seen corresponding path program 1 times [2024-06-21 21:31:10,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:31:10,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35603768] [2024-06-21 21:31:10,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:31:10,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:31:10,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:31:13,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:31:13,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:31:13,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35603768] [2024-06-21 21:31:13,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35603768] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:31:13,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:31:13,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:31:13,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714987234] [2024-06-21 21:31:13,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:31:13,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:31:13,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:31:13,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:31:13,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:31:13,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:31:13,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 253 transitions, 3657 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) [2024-06-21 21:31:13,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:31:13,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:31:13,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:31:16,040 INFO L124 PetriNetUnfolderBase]: 6413/10219 cut-off events. [2024-06-21 21:31:16,040 INFO L125 PetriNetUnfolderBase]: For 281536/281540 co-relation queries the response was YES. [2024-06-21 21:31:16,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59685 conditions, 10219 events. 6413/10219 cut-off events. For 281536/281540 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 67632 event pairs, 2799 based on Foata normal form. 8/10224 useless extension candidates. Maximal degree in co-relation 59604. Up to 9950 conditions per place. [2024-06-21 21:31:16,149 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 255 selfloop transitions, 23 changer transitions 0/282 dead transitions. [2024-06-21 21:31:16,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 282 transitions, 4380 flow [2024-06-21 21:31:16,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:31:16,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:31:16,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-21 21:31:16,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-21 21:31:16,150 INFO L175 Difference]: Start difference. First operand has 164 places, 253 transitions, 3657 flow. Second operand 7 states and 112 transitions. [2024-06-21 21:31:16,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 282 transitions, 4380 flow [2024-06-21 21:31:16,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 282 transitions, 4237 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-21 21:31:16,688 INFO L231 Difference]: Finished difference. Result has 166 places, 260 transitions, 3682 flow [2024-06-21 21:31:16,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3516, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3682, PETRI_PLACES=166, PETRI_TRANSITIONS=260} [2024-06-21 21:31:16,689 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 123 predicate places. [2024-06-21 21:31:16,689 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 260 transitions, 3682 flow [2024-06-21 21:31:16,689 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) [2024-06-21 21:31:16,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:31:16,689 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:31:16,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 21:31:16,690 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:31:16,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:31:16,690 INFO L85 PathProgramCache]: Analyzing trace with hash 778875920, now seen corresponding path program 2 times [2024-06-21 21:31:16,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:31:16,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362855305] [2024-06-21 21:31:16,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:31:16,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:31:16,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:31:19,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:31:19,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:31:19,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362855305] [2024-06-21 21:31:19,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362855305] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:31:19,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:31:19,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:31:19,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359712721] [2024-06-21 21:31:19,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:31:19,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:31:19,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:31:19,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:31:19,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:31:19,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:31:19,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 260 transitions, 3682 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) [2024-06-21 21:31:19,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:31:19,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:31:19,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:31:22,124 INFO L124 PetriNetUnfolderBase]: 6407/10227 cut-off events. [2024-06-21 21:31:22,124 INFO L125 PetriNetUnfolderBase]: For 290246/290264 co-relation queries the response was YES. [2024-06-21 21:31:22,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59529 conditions, 10227 events. 6407/10227 cut-off events. For 290246/290264 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 67884 event pairs, 2759 based on Foata normal form. 14/10234 useless extension candidates. Maximal degree in co-relation 59447. Up to 9919 conditions per place. [2024-06-21 21:31:22,219 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 246 selfloop transitions, 29 changer transitions 0/279 dead transitions. [2024-06-21 21:31:22,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 279 transitions, 4398 flow [2024-06-21 21:31:22,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:31:22,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:31:22,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 96 transitions. [2024-06-21 21:31:22,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-21 21:31:22,220 INFO L175 Difference]: Start difference. First operand has 166 places, 260 transitions, 3682 flow. Second operand 6 states and 96 transitions. [2024-06-21 21:31:22,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 279 transitions, 4398 flow [2024-06-21 21:31:22,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 279 transitions, 4319 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-21 21:31:22,618 INFO L231 Difference]: Finished difference. Result has 168 places, 263 transitions, 3723 flow [2024-06-21 21:31:22,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3603, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3723, PETRI_PLACES=168, PETRI_TRANSITIONS=263} [2024-06-21 21:31:22,618 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 125 predicate places. [2024-06-21 21:31:22,618 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 263 transitions, 3723 flow [2024-06-21 21:31:22,618 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) [2024-06-21 21:31:22,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:31:22,618 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:31:22,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 21:31:22,619 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:31:22,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:31:22,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1203773808, now seen corresponding path program 3 times [2024-06-21 21:31:22,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:31:22,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209768586] [2024-06-21 21:31:22,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:31:22,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:31:22,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:31:25,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:31:25,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:31:25,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209768586] [2024-06-21 21:31:25,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209768586] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:31:25,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:31:25,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:31:25,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107147878] [2024-06-21 21:31:25,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:31:25,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:31:25,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:31:25,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:31:25,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:31:25,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:31:25,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 263 transitions, 3723 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) [2024-06-21 21:31:25,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:31:25,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:31:25,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:31:28,020 INFO L124 PetriNetUnfolderBase]: 6401/10215 cut-off events. [2024-06-21 21:31:28,020 INFO L125 PetriNetUnfolderBase]: For 303239/303245 co-relation queries the response was YES. [2024-06-21 21:31:28,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60361 conditions, 10215 events. 6401/10215 cut-off events. For 303239/303245 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 67856 event pairs, 2789 based on Foata normal form. 8/10220 useless extension candidates. Maximal degree in co-relation 60278. Up to 9928 conditions per place. [2024-06-21 21:31:28,097 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 255 selfloop transitions, 25 changer transitions 0/284 dead transitions. [2024-06-21 21:31:28,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 284 transitions, 4351 flow [2024-06-21 21:31:28,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:31:28,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:31:28,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-21 21:31:28,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4007936507936508 [2024-06-21 21:31:28,099 INFO L175 Difference]: Start difference. First operand has 168 places, 263 transitions, 3723 flow. Second operand 6 states and 101 transitions. [2024-06-21 21:31:28,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 284 transitions, 4351 flow [2024-06-21 21:31:28,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 284 transitions, 4161 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-21 21:31:28,470 INFO L231 Difference]: Finished difference. Result has 169 places, 263 transitions, 3596 flow [2024-06-21 21:31:28,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3533, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3596, PETRI_PLACES=169, PETRI_TRANSITIONS=263} [2024-06-21 21:31:28,471 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 126 predicate places. [2024-06-21 21:31:28,471 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 263 transitions, 3596 flow [2024-06-21 21:31:28,471 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) [2024-06-21 21:31:28,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:31:28,471 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:31:28,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 21:31:28,471 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)] === [2024-06-21 21:31:28,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:31:28,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1657180216, now seen corresponding path program 1 times [2024-06-21 21:31:28,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:31:28,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597136335] [2024-06-21 21:31:28,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:31:28,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:31:28,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:31:30,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:31:30,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:31:30,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597136335] [2024-06-21 21:31:30,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597136335] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:31:30,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:31:30,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:31:30,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687159778] [2024-06-21 21:31:30,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:31:30,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:31:30,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:31:30,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:31:30,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:31:30,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:31:30,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 263 transitions, 3596 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) [2024-06-21 21:31:30,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:31:30,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:31:30,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:31:33,200 INFO L124 PetriNetUnfolderBase]: 6443/10264 cut-off events. [2024-06-21 21:31:33,201 INFO L125 PetriNetUnfolderBase]: For 321634/321636 co-relation queries the response was YES. [2024-06-21 21:31:33,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60607 conditions, 10264 events. 6443/10264 cut-off events. For 321634/321636 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 67955 event pairs, 2791 based on Foata normal form. 2/10263 useless extension candidates. Maximal degree in co-relation 60525. Up to 9909 conditions per place. [2024-06-21 21:31:33,287 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 271 selfloop transitions, 27 changer transitions 0/302 dead transitions. [2024-06-21 21:31:33,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 302 transitions, 4576 flow [2024-06-21 21:31:33,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:31:33,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:31:33,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-21 21:31:33,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217687074829932 [2024-06-21 21:31:33,289 INFO L175 Difference]: Start difference. First operand has 169 places, 263 transitions, 3596 flow. Second operand 7 states and 124 transitions. [2024-06-21 21:31:33,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 302 transitions, 4576 flow [2024-06-21 21:31:33,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 302 transitions, 4372 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-21 21:31:33,712 INFO L231 Difference]: Finished difference. Result has 170 places, 274 transitions, 3645 flow [2024-06-21 21:31:33,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3396, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3645, PETRI_PLACES=170, PETRI_TRANSITIONS=274} [2024-06-21 21:31:33,713 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 127 predicate places. [2024-06-21 21:31:33,713 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 274 transitions, 3645 flow [2024-06-21 21:31:33,713 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) [2024-06-21 21:31:33,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:31:33,713 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:31:33,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 21:31:33,714 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)] === [2024-06-21 21:31:33,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:31:33,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1828002802, now seen corresponding path program 1 times [2024-06-21 21:31:33,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:31:33,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746070943] [2024-06-21 21:31:33,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:31:33,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:31:33,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:31:36,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:31:36,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:31:36,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746070943] [2024-06-21 21:31:36,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746070943] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:31:36,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:31:36,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:31:36,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831776149] [2024-06-21 21:31:36,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:31:36,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:31:36,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:31:36,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:31:36,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:31:36,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:31:36,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 274 transitions, 3645 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) [2024-06-21 21:31:36,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:31:36,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:31:36,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:31:38,642 INFO L124 PetriNetUnfolderBase]: 6534/10393 cut-off events. [2024-06-21 21:31:38,642 INFO L125 PetriNetUnfolderBase]: For 327524/327526 co-relation queries the response was YES. [2024-06-21 21:31:38,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62567 conditions, 10393 events. 6534/10393 cut-off events. For 327524/327526 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 68837 event pairs, 2857 based on Foata normal form. 6/10396 useless extension candidates. Maximal degree in co-relation 62483. Up to 10088 conditions per place. [2024-06-21 21:31:38,733 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 279 selfloop transitions, 24 changer transitions 0/307 dead transitions. [2024-06-21 21:31:38,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 307 transitions, 4551 flow [2024-06-21 21:31:38,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:31:38,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:31:38,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-21 21:31:38,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37202380952380953 [2024-06-21 21:31:38,735 INFO L175 Difference]: Start difference. First operand has 170 places, 274 transitions, 3645 flow. Second operand 8 states and 125 transitions. [2024-06-21 21:31:38,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 307 transitions, 4551 flow [2024-06-21 21:31:39,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 307 transitions, 4445 flow, removed 48 selfloop flow, removed 2 redundant places. [2024-06-21 21:31:39,208 INFO L231 Difference]: Finished difference. Result has 177 places, 285 transitions, 3787 flow [2024-06-21 21:31:39,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3561, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3787, PETRI_PLACES=177, PETRI_TRANSITIONS=285} [2024-06-21 21:31:39,209 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 134 predicate places. [2024-06-21 21:31:39,209 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 285 transitions, 3787 flow [2024-06-21 21:31:39,209 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) [2024-06-21 21:31:39,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:31:39,209 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:31:39,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 21:31:39,209 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:31:39,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:31:39,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1657300186, now seen corresponding path program 2 times [2024-06-21 21:31:39,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:31:39,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546412957] [2024-06-21 21:31:39,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:31:39,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:31:39,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:31:41,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:31:41,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:31:41,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546412957] [2024-06-21 21:31:41,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546412957] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:31:41,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:31:41,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:31:41,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022789601] [2024-06-21 21:31:41,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:31:41,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:31:41,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:31:41,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:31:41,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:31:41,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:31:41,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 285 transitions, 3787 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) [2024-06-21 21:31:41,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:31:41,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:31:41,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:31:44,047 INFO L124 PetriNetUnfolderBase]: 6508/10357 cut-off events. [2024-06-21 21:31:44,047 INFO L125 PetriNetUnfolderBase]: For 339445/339447 co-relation queries the response was YES. [2024-06-21 21:31:44,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62539 conditions, 10357 events. 6508/10357 cut-off events. For 339445/339447 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 68615 event pairs, 2856 based on Foata normal form. 6/10360 useless extension candidates. Maximal degree in co-relation 62452. Up to 10069 conditions per place. [2024-06-21 21:31:44,153 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 278 selfloop transitions, 24 changer transitions 0/306 dead transitions. [2024-06-21 21:31:44,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 306 transitions, 4449 flow [2024-06-21 21:31:44,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:31:44,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:31:44,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-21 21:31:44,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36904761904761907 [2024-06-21 21:31:44,154 INFO L175 Difference]: Start difference. First operand has 177 places, 285 transitions, 3787 flow. Second operand 8 states and 124 transitions. [2024-06-21 21:31:44,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 306 transitions, 4449 flow [2024-06-21 21:31:44,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 306 transitions, 4339 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-21 21:31:44,736 INFO L231 Difference]: Finished difference. Result has 181 places, 285 transitions, 3733 flow [2024-06-21 21:31:44,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3677, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3733, PETRI_PLACES=181, PETRI_TRANSITIONS=285} [2024-06-21 21:31:44,736 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 138 predicate places. [2024-06-21 21:31:44,736 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 285 transitions, 3733 flow [2024-06-21 21:31:44,737 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) [2024-06-21 21:31:44,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:31:44,737 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:31:44,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 21:31:44,737 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:31:44,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:31:44,737 INFO L85 PathProgramCache]: Analyzing trace with hash 778881872, now seen corresponding path program 2 times [2024-06-21 21:31:44,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:31:44,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750139643] [2024-06-21 21:31:44,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:31:44,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:31:44,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:31:47,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:31:47,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:31:47,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750139643] [2024-06-21 21:31:47,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750139643] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:31:47,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:31:47,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:31:47,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873915397] [2024-06-21 21:31:47,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:31:47,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:31:47,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:31:47,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:31:47,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:31:47,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:31:47,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 285 transitions, 3733 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) [2024-06-21 21:31:47,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:31:47,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:31:47,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:31:49,761 INFO L124 PetriNetUnfolderBase]: 6550/10414 cut-off events. [2024-06-21 21:31:49,762 INFO L125 PetriNetUnfolderBase]: For 354607/354612 co-relation queries the response was YES. [2024-06-21 21:31:49,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63293 conditions, 10414 events. 6550/10414 cut-off events. For 354607/354612 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 68810 event pairs, 2806 based on Foata normal form. 4/10414 useless extension candidates. Maximal degree in co-relation 63205. Up to 10017 conditions per place. [2024-06-21 21:31:49,895 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 272 selfloop transitions, 38 changer transitions 0/314 dead transitions. [2024-06-21 21:31:49,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 314 transitions, 4649 flow [2024-06-21 21:31:49,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:31:49,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:31:49,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-21 21:31:49,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4013605442176871 [2024-06-21 21:31:49,897 INFO L175 Difference]: Start difference. First operand has 181 places, 285 transitions, 3733 flow. Second operand 7 states and 118 transitions. [2024-06-21 21:31:49,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 314 transitions, 4649 flow [2024-06-21 21:31:50,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 314 transitions, 4601 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 21:31:50,442 INFO L231 Difference]: Finished difference. Result has 182 places, 291 transitions, 3875 flow [2024-06-21 21:31:50,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3685, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3875, PETRI_PLACES=182, PETRI_TRANSITIONS=291} [2024-06-21 21:31:50,443 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 139 predicate places. [2024-06-21 21:31:50,443 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 291 transitions, 3875 flow [2024-06-21 21:31:50,443 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) [2024-06-21 21:31:50,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:31:50,443 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:31:50,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 21:31:50,444 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:31:50,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:31:50,444 INFO L85 PathProgramCache]: Analyzing trace with hash 778644536, now seen corresponding path program 3 times [2024-06-21 21:31:50,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:31:50,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545929057] [2024-06-21 21:31:50,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:31:50,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:31:50,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:31:52,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:31:52,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:31:52,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545929057] [2024-06-21 21:31:52,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545929057] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:31:52,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:31:52,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:31:52,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358424164] [2024-06-21 21:31:52,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:31:52,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:31:52,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:31:52,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:31:52,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:31:52,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:31:52,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 291 transitions, 3875 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) [2024-06-21 21:31:52,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:31:52,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:31:52,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:31:55,387 INFO L124 PetriNetUnfolderBase]: 6540/10401 cut-off events. [2024-06-21 21:31:55,388 INFO L125 PetriNetUnfolderBase]: For 369938/369940 co-relation queries the response was YES. [2024-06-21 21:31:55,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63656 conditions, 10401 events. 6540/10401 cut-off events. For 369938/369940 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 68713 event pairs, 2802 based on Foata normal form. 6/10404 useless extension candidates. Maximal degree in co-relation 63566. Up to 10014 conditions per place. [2024-06-21 21:31:55,500 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 274 selfloop transitions, 40 changer transitions 0/318 dead transitions. [2024-06-21 21:31:55,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 318 transitions, 4655 flow [2024-06-21 21:31:55,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:31:55,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:31:55,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-21 21:31:55,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-21 21:31:55,501 INFO L175 Difference]: Start difference. First operand has 182 places, 291 transitions, 3875 flow. Second operand 8 states and 131 transitions. [2024-06-21 21:31:55,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 318 transitions, 4655 flow [2024-06-21 21:31:56,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 318 transitions, 4532 flow, removed 40 selfloop flow, removed 4 redundant places. [2024-06-21 21:31:56,101 INFO L231 Difference]: Finished difference. Result has 186 places, 291 transitions, 3851 flow [2024-06-21 21:31:56,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3752, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3851, PETRI_PLACES=186, PETRI_TRANSITIONS=291} [2024-06-21 21:31:56,102 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 143 predicate places. [2024-06-21 21:31:56,102 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 291 transitions, 3851 flow [2024-06-21 21:31:56,102 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) [2024-06-21 21:31:56,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:31:56,102 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:31:56,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 21:31:56,103 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:31:56,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:31:56,103 INFO L85 PathProgramCache]: Analyzing trace with hash 31150840, now seen corresponding path program 3 times [2024-06-21 21:31:56,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:31:56,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297063223] [2024-06-21 21:31:56,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:31:56,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:31:56,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:31:58,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:31:58,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:31:58,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297063223] [2024-06-21 21:31:58,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297063223] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:31:58,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:31:58,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:31:58,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068445034] [2024-06-21 21:31:58,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:31:58,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:31:58,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:31:58,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:31:58,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:31:58,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:31:58,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 291 transitions, 3851 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) [2024-06-21 21:31:58,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:31:58,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:31:58,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:32:01,018 INFO L124 PetriNetUnfolderBase]: 6514/10365 cut-off events. [2024-06-21 21:32:01,018 INFO L125 PetriNetUnfolderBase]: For 382105/382107 co-relation queries the response was YES. [2024-06-21 21:32:01,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63641 conditions, 10365 events. 6514/10365 cut-off events. For 382105/382107 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 68488 event pairs, 2799 based on Foata normal form. 6/10368 useless extension candidates. Maximal degree in co-relation 63550. Up to 9995 conditions per place. [2024-06-21 21:32:01,119 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 274 selfloop transitions, 39 changer transitions 0/317 dead transitions. [2024-06-21 21:32:01,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 317 transitions, 4551 flow [2024-06-21 21:32:01,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:32:01,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:32:01,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-21 21:32:01,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-21 21:32:01,121 INFO L175 Difference]: Start difference. First operand has 186 places, 291 transitions, 3851 flow. Second operand 8 states and 131 transitions. [2024-06-21 21:32:01,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 317 transitions, 4551 flow [2024-06-21 21:32:01,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 317 transitions, 4463 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-21 21:32:01,634 INFO L231 Difference]: Finished difference. Result has 187 places, 291 transitions, 3855 flow [2024-06-21 21:32:01,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3763, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3855, PETRI_PLACES=187, PETRI_TRANSITIONS=291} [2024-06-21 21:32:01,635 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 144 predicate places. [2024-06-21 21:32:01,635 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 291 transitions, 3855 flow [2024-06-21 21:32:01,635 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) [2024-06-21 21:32:01,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:32:01,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:32:01,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 21:32:01,636 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)] === [2024-06-21 21:32:01,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:32:01,636 INFO L85 PathProgramCache]: Analyzing trace with hash 778890800, now seen corresponding path program 1 times [2024-06-21 21:32:01,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:32:01,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244480027] [2024-06-21 21:32:01,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:32:01,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:32:01,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:32:04,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:32:04,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:32:04,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244480027] [2024-06-21 21:32:04,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244480027] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:32:04,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:32:04,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:32:04,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417043069] [2024-06-21 21:32:04,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:32:04,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:32:04,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:32:04,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:32:04,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:32:04,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:32:04,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 291 transitions, 3855 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) [2024-06-21 21:32:04,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:32:04,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:32:04,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:32:07,072 INFO L124 PetriNetUnfolderBase]: 6509/10357 cut-off events. [2024-06-21 21:32:07,072 INFO L125 PetriNetUnfolderBase]: For 378122/378124 co-relation queries the response was YES. [2024-06-21 21:32:07,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63490 conditions, 10357 events. 6509/10357 cut-off events. For 378122/378124 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 68330 event pairs, 2854 based on Foata normal form. 2/10356 useless extension candidates. Maximal degree in co-relation 63399. Up to 10121 conditions per place. [2024-06-21 21:32:07,174 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 290 selfloop transitions, 12 changer transitions 0/306 dead transitions. [2024-06-21 21:32:07,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 306 transitions, 4527 flow [2024-06-21 21:32:07,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:32:07,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:32:07,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 92 transitions. [2024-06-21 21:32:07,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36507936507936506 [2024-06-21 21:32:07,175 INFO L175 Difference]: Start difference. First operand has 187 places, 291 transitions, 3855 flow. Second operand 6 states and 92 transitions. [2024-06-21 21:32:07,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 306 transitions, 4527 flow [2024-06-21 21:32:07,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 306 transitions, 4429 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-21 21:32:07,668 INFO L231 Difference]: Finished difference. Result has 185 places, 293 transitions, 3822 flow [2024-06-21 21:32:07,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3757, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3822, PETRI_PLACES=185, PETRI_TRANSITIONS=293} [2024-06-21 21:32:07,669 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 142 predicate places. [2024-06-21 21:32:07,669 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 293 transitions, 3822 flow [2024-06-21 21:32:07,669 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) [2024-06-21 21:32:07,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:32:07,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:32:07,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 21:32:07,670 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)] === [2024-06-21 21:32:07,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:32:07,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1374390097, now seen corresponding path program 1 times [2024-06-21 21:32:07,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:32:07,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24041675] [2024-06-21 21:32:07,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:32:07,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:32:07,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:32:10,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:32:10,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:32:10,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24041675] [2024-06-21 21:32:10,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24041675] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:32:10,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:32:10,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:32:10,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918638915] [2024-06-21 21:32:10,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:32:10,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:32:10,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:32:10,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:32:10,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:32:10,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:32:10,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 293 transitions, 3822 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) [2024-06-21 21:32:10,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:32:10,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:32:10,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:32:13,400 INFO L124 PetriNetUnfolderBase]: 6669/10594 cut-off events. [2024-06-21 21:32:13,400 INFO L125 PetriNetUnfolderBase]: For 406098/406113 co-relation queries the response was YES. [2024-06-21 21:32:13,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65496 conditions, 10594 events. 6669/10594 cut-off events. For 406098/406113 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 70049 event pairs, 2699 based on Foata normal form. 30/10620 useless extension candidates. Maximal degree in co-relation 65404. Up to 9997 conditions per place. [2024-06-21 21:32:13,512 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 262 selfloop transitions, 81 changer transitions 4/351 dead transitions. [2024-06-21 21:32:13,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 351 transitions, 4982 flow [2024-06-21 21:32:13,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:32:13,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:32:13,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-21 21:32:13,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-21 21:32:13,514 INFO L175 Difference]: Start difference. First operand has 185 places, 293 transitions, 3822 flow. Second operand 9 states and 154 transitions. [2024-06-21 21:32:13,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 351 transitions, 4982 flow [2024-06-21 21:32:14,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 351 transitions, 4933 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-21 21:32:14,124 INFO L231 Difference]: Finished difference. Result has 191 places, 314 transitions, 4310 flow [2024-06-21 21:32:14,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3773, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4310, PETRI_PLACES=191, PETRI_TRANSITIONS=314} [2024-06-21 21:32:14,124 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 148 predicate places. [2024-06-21 21:32:14,124 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 314 transitions, 4310 flow [2024-06-21 21:32:14,125 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) [2024-06-21 21:32:14,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:32:14,125 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:32:14,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 21:32:14,125 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)] === [2024-06-21 21:32:14,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:32:14,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1365135667, now seen corresponding path program 2 times [2024-06-21 21:32:14,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:32:14,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088593702] [2024-06-21 21:32:14,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:32:14,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:32:14,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:32:17,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:32:17,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:32:17,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088593702] [2024-06-21 21:32:17,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088593702] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:32:17,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:32:17,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:32:17,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168242888] [2024-06-21 21:32:17,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:32:17,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:32:17,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:32:17,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:32:17,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:32:17,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:32:17,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 314 transitions, 4310 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) [2024-06-21 21:32:17,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:32:17,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:32:17,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:32:20,144 INFO L124 PetriNetUnfolderBase]: 7124/11278 cut-off events. [2024-06-21 21:32:20,144 INFO L125 PetriNetUnfolderBase]: For 449940/449949 co-relation queries the response was YES. [2024-06-21 21:32:20,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71838 conditions, 11278 events. 7124/11278 cut-off events. For 449940/449949 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 74669 event pairs, 2647 based on Foata normal form. 22/11296 useless extension candidates. Maximal degree in co-relation 71744. Up to 9707 conditions per place. [2024-06-21 21:32:20,265 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 245 selfloop transitions, 145 changer transitions 1/395 dead transitions. [2024-06-21 21:32:20,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 395 transitions, 6099 flow [2024-06-21 21:32:20,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:32:20,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:32:20,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-21 21:32:20,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3976190476190476 [2024-06-21 21:32:20,266 INFO L175 Difference]: Start difference. First operand has 191 places, 314 transitions, 4310 flow. Second operand 10 states and 167 transitions. [2024-06-21 21:32:20,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 395 transitions, 6099 flow [2024-06-21 21:32:21,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 395 transitions, 5883 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-21 21:32:21,169 INFO L231 Difference]: Finished difference. Result has 199 places, 359 transitions, 5301 flow [2024-06-21 21:32:21,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4116, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5301, PETRI_PLACES=199, PETRI_TRANSITIONS=359} [2024-06-21 21:32:21,169 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 156 predicate places. [2024-06-21 21:32:21,169 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 359 transitions, 5301 flow [2024-06-21 21:32:21,169 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) [2024-06-21 21:32:21,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:32:21,169 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:32:21,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 21:32:21,170 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)] === [2024-06-21 21:32:21,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:32:21,170 INFO L85 PathProgramCache]: Analyzing trace with hash -288901009, now seen corresponding path program 3 times [2024-06-21 21:32:21,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:32:21,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838166849] [2024-06-21 21:32:21,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:32:21,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:32:21,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:32:24,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:32:24,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:32:24,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838166849] [2024-06-21 21:32:24,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838166849] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:32:24,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:32:24,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:32:24,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539011655] [2024-06-21 21:32:24,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:32:24,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:32:24,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:32:24,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:32:24,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:32:24,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:32:24,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 359 transitions, 5301 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) [2024-06-21 21:32:24,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:32:24,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:32:24,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:32:27,087 INFO L124 PetriNetUnfolderBase]: 7092/11254 cut-off events. [2024-06-21 21:32:27,087 INFO L125 PetriNetUnfolderBase]: For 462448/462457 co-relation queries the response was YES. [2024-06-21 21:32:27,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73391 conditions, 11254 events. 7092/11254 cut-off events. For 462448/462457 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 74767 event pairs, 2559 based on Foata normal form. 22/11272 useless extension candidates. Maximal degree in co-relation 73293. Up to 9701 conditions per place. [2024-06-21 21:32:27,188 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 246 selfloop transitions, 142 changer transitions 0/392 dead transitions. [2024-06-21 21:32:27,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 392 transitions, 6286 flow [2024-06-21 21:32:27,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:32:27,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:32:27,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-21 21:32:27,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4021164021164021 [2024-06-21 21:32:27,189 INFO L175 Difference]: Start difference. First operand has 199 places, 359 transitions, 5301 flow. Second operand 9 states and 152 transitions. [2024-06-21 21:32:27,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 392 transitions, 6286 flow [2024-06-21 21:32:27,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 392 transitions, 6124 flow, removed 70 selfloop flow, removed 3 redundant places. [2024-06-21 21:32:27,948 INFO L231 Difference]: Finished difference. Result has 207 places, 364 transitions, 5600 flow [2024-06-21 21:32:27,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5139, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5600, PETRI_PLACES=207, PETRI_TRANSITIONS=364} [2024-06-21 21:32:27,948 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 164 predicate places. [2024-06-21 21:32:27,948 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 364 transitions, 5600 flow [2024-06-21 21:32:27,949 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) [2024-06-21 21:32:27,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:32:27,949 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:32:27,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 21:32:27,949 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)] === [2024-06-21 21:32:27,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:32:27,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1984011259, now seen corresponding path program 4 times [2024-06-21 21:32:27,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:32:27,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478815756] [2024-06-21 21:32:27,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:32:27,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:32:27,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:32:31,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:32:31,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:32:31,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478815756] [2024-06-21 21:32:31,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478815756] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:32:31,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:32:31,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:32:31,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079425965] [2024-06-21 21:32:31,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:32:31,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:32:31,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:32:31,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:32:31,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:32:31,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:32:31,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 364 transitions, 5600 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) [2024-06-21 21:32:31,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:32:31,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:32:31,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:32:34,221 INFO L124 PetriNetUnfolderBase]: 7132/11333 cut-off events. [2024-06-21 21:32:34,222 INFO L125 PetriNetUnfolderBase]: For 479791/479806 co-relation queries the response was YES. [2024-06-21 21:32:34,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75789 conditions, 11333 events. 7132/11333 cut-off events. For 479791/479806 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 75388 event pairs, 2586 based on Foata normal form. 22/11351 useless extension candidates. Maximal degree in co-relation 75688. Up to 9084 conditions per place. [2024-06-21 21:32:34,335 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 195 selfloop transitions, 216 changer transitions 1/416 dead transitions. [2024-06-21 21:32:34,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 416 transitions, 6834 flow [2024-06-21 21:32:34,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:32:34,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:32:34,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-21 21:32:34,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4576719576719577 [2024-06-21 21:32:34,336 INFO L175 Difference]: Start difference. First operand has 207 places, 364 transitions, 5600 flow. Second operand 9 states and 173 transitions. [2024-06-21 21:32:34,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 416 transitions, 6834 flow [2024-06-21 21:32:35,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 416 transitions, 6638 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-21 21:32:35,109 INFO L231 Difference]: Finished difference. Result has 211 places, 368 transitions, 5949 flow [2024-06-21 21:32:35,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5404, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=212, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5949, PETRI_PLACES=211, PETRI_TRANSITIONS=368} [2024-06-21 21:32:35,109 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 168 predicate places. [2024-06-21 21:32:35,109 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 368 transitions, 5949 flow [2024-06-21 21:32:35,110 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) [2024-06-21 21:32:35,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:32:35,110 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:32:35,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 21:32:35,110 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)] === [2024-06-21 21:32:35,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:32:35,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1637161267, now seen corresponding path program 5 times [2024-06-21 21:32:35,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:32:35,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54927725] [2024-06-21 21:32:35,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:32:35,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:32:35,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:32:38,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:32:38,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:32:38,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54927725] [2024-06-21 21:32:38,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54927725] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:32:38,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:32:38,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:32:38,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662650679] [2024-06-21 21:32:38,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:32:38,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:32:38,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:32:38,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:32:38,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:32:38,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:32:38,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 368 transitions, 5949 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) [2024-06-21 21:32:38,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:32:38,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:32:38,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:32:41,506 INFO L124 PetriNetUnfolderBase]: 7356/11660 cut-off events. [2024-06-21 21:32:41,506 INFO L125 PetriNetUnfolderBase]: For 527741/527772 co-relation queries the response was YES. [2024-06-21 21:32:41,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80040 conditions, 11660 events. 7356/11660 cut-off events. For 527741/527772 co-relation queries the response was YES. Maximal size of possible extension queue 523. Compared 77495 event pairs, 2275 based on Foata normal form. 22/11664 useless extension candidates. Maximal degree in co-relation 79938. Up to 9271 conditions per place. [2024-06-21 21:32:41,640 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 208 selfloop transitions, 204 changer transitions 0/416 dead transitions. [2024-06-21 21:32:41,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 416 transitions, 7450 flow [2024-06-21 21:32:41,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:32:41,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:32:41,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 162 transitions. [2024-06-21 21:32:41,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38571428571428573 [2024-06-21 21:32:41,641 INFO L175 Difference]: Start difference. First operand has 211 places, 368 transitions, 5949 flow. Second operand 10 states and 162 transitions. [2024-06-21 21:32:41,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 416 transitions, 7450 flow [2024-06-21 21:32:42,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 416 transitions, 7081 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-21 21:32:42,778 INFO L231 Difference]: Finished difference. Result has 217 places, 387 transitions, 6397 flow [2024-06-21 21:32:42,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5594, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6397, PETRI_PLACES=217, PETRI_TRANSITIONS=387} [2024-06-21 21:32:42,779 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 174 predicate places. [2024-06-21 21:32:42,779 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 387 transitions, 6397 flow [2024-06-21 21:32:42,779 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) [2024-06-21 21:32:42,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:32:42,779 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:32:42,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 21:32:42,780 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)] === [2024-06-21 21:32:42,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:32:42,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1027095141, now seen corresponding path program 6 times [2024-06-21 21:32:42,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:32:42,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434756866] [2024-06-21 21:32:42,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:32:42,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:32:42,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:32:46,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:32:46,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:32:46,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434756866] [2024-06-21 21:32:46,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434756866] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:32:46,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:32:46,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:32:46,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094311412] [2024-06-21 21:32:46,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:32:46,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:32:46,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:32:46,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:32:46,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:32:46,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:32:46,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 387 transitions, 6397 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) [2024-06-21 21:32:46,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:32:46,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:32:46,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:32:49,364 INFO L124 PetriNetUnfolderBase]: 7344/11686 cut-off events. [2024-06-21 21:32:49,364 INFO L125 PetriNetUnfolderBase]: For 528522/528533 co-relation queries the response was YES. [2024-06-21 21:32:49,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82198 conditions, 11686 events. 7344/11686 cut-off events. For 528522/528533 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 78188 event pairs, 2603 based on Foata normal form. 15/11697 useless extension candidates. Maximal degree in co-relation 82093. Up to 9397 conditions per place. [2024-06-21 21:32:49,493 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 214 selfloop transitions, 199 changer transitions 0/417 dead transitions. [2024-06-21 21:32:49,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 417 transitions, 7393 flow [2024-06-21 21:32:49,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:32:49,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:32:49,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-21 21:32:49,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 21:32:49,494 INFO L175 Difference]: Start difference. First operand has 217 places, 387 transitions, 6397 flow. Second operand 8 states and 144 transitions. [2024-06-21 21:32:49,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 417 transitions, 7393 flow [2024-06-21 21:32:50,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 417 transitions, 7132 flow, removed 71 selfloop flow, removed 4 redundant places. [2024-06-21 21:32:50,673 INFO L231 Difference]: Finished difference. Result has 221 places, 387 transitions, 6557 flow [2024-06-21 21:32:50,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6136, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=199, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6557, PETRI_PLACES=221, PETRI_TRANSITIONS=387} [2024-06-21 21:32:50,674 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 178 predicate places. [2024-06-21 21:32:50,674 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 387 transitions, 6557 flow [2024-06-21 21:32:50,674 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) [2024-06-21 21:32:50,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:32:50,674 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:32:50,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 21:32:50,674 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)] === [2024-06-21 21:32:50,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:32:50,675 INFO L85 PathProgramCache]: Analyzing trace with hash 2053766039, now seen corresponding path program 1 times [2024-06-21 21:32:50,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:32:50,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217150082] [2024-06-21 21:32:50,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:32:50,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:32:50,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:32:53,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:32:53,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:32:53,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217150082] [2024-06-21 21:32:53,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217150082] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:32:53,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:32:53,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:32:53,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55962941] [2024-06-21 21:32:53,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:32:53,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:32:53,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:32:53,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:32:53,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:32:53,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:32:53,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 387 transitions, 6557 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) [2024-06-21 21:32:53,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:32:53,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:32:53,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:32:56,769 INFO L124 PetriNetUnfolderBase]: 7332/11651 cut-off events. [2024-06-21 21:32:56,769 INFO L125 PetriNetUnfolderBase]: For 549842/549846 co-relation queries the response was YES. [2024-06-21 21:32:56,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82730 conditions, 11651 events. 7332/11651 cut-off events. For 549842/549846 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 77942 event pairs, 3094 based on Foata normal form. 5/11653 useless extension candidates. Maximal degree in co-relation 82625. Up to 11129 conditions per place. [2024-06-21 21:32:56,896 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 368 selfloop transitions, 43 changer transitions 0/415 dead transitions. [2024-06-21 21:32:56,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 415 transitions, 7455 flow [2024-06-21 21:32:56,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:32:56,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:32:56,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-21 21:32:56,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-21 21:32:56,898 INFO L175 Difference]: Start difference. First operand has 221 places, 387 transitions, 6557 flow. Second operand 8 states and 135 transitions. [2024-06-21 21:32:56,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 415 transitions, 7455 flow [2024-06-21 21:32:58,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 415 transitions, 6828 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-21 21:32:58,232 INFO L231 Difference]: Finished difference. Result has 220 places, 387 transitions, 6022 flow [2024-06-21 21:32:58,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5930, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6022, PETRI_PLACES=220, PETRI_TRANSITIONS=387} [2024-06-21 21:32:58,233 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 177 predicate places. [2024-06-21 21:32:58,233 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 387 transitions, 6022 flow [2024-06-21 21:32:58,233 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) [2024-06-21 21:32:58,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:32:58,233 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:32:58,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 21:32:58,234 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)] === [2024-06-21 21:32:58,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:32:58,234 INFO L85 PathProgramCache]: Analyzing trace with hash -1191101157, now seen corresponding path program 1 times [2024-06-21 21:32:58,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:32:58,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190534201] [2024-06-21 21:32:58,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:32:58,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:32:58,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:33:01,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:33:01,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:33:01,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190534201] [2024-06-21 21:33:01,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190534201] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:33:01,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:33:01,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:33:01,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133409781] [2024-06-21 21:33:01,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:33:01,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:33:01,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:33:01,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:33:01,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:33:01,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:33:01,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 387 transitions, 6022 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) [2024-06-21 21:33:01,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:33:01,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:33:01,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:33:04,483 INFO L124 PetriNetUnfolderBase]: 7512/11858 cut-off events. [2024-06-21 21:33:04,483 INFO L125 PetriNetUnfolderBase]: For 554322/554329 co-relation queries the response was YES. [2024-06-21 21:33:04,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83185 conditions, 11858 events. 7512/11858 cut-off events. For 554322/554329 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 78729 event pairs, 2549 based on Foata normal form. 7/11861 useless extension candidates. Maximal degree in co-relation 83079. Up to 9425 conditions per place. [2024-06-21 21:33:04,597 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 222 selfloop transitions, 219 changer transitions 0/445 dead transitions. [2024-06-21 21:33:04,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 445 transitions, 7487 flow [2024-06-21 21:33:04,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:33:04,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:33:04,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-21 21:33:04,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.430952380952381 [2024-06-21 21:33:04,600 INFO L175 Difference]: Start difference. First operand has 220 places, 387 transitions, 6022 flow. Second operand 10 states and 181 transitions. [2024-06-21 21:33:04,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 445 transitions, 7487 flow [2024-06-21 21:33:05,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 445 transitions, 7314 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-21 21:33:05,577 INFO L231 Difference]: Finished difference. Result has 222 places, 398 transitions, 6543 flow [2024-06-21 21:33:05,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5853, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=211, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6543, PETRI_PLACES=222, PETRI_TRANSITIONS=398} [2024-06-21 21:33:05,578 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 179 predicate places. [2024-06-21 21:33:05,578 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 398 transitions, 6543 flow [2024-06-21 21:33:05,578 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) [2024-06-21 21:33:05,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:33:05,579 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] [2024-06-21 21:33:05,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 21:33:05,579 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)] === [2024-06-21 21:33:05,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:33:05,579 INFO L85 PathProgramCache]: Analyzing trace with hash 453449781, now seen corresponding path program 1 times [2024-06-21 21:33:05,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:33:05,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620845510] [2024-06-21 21:33:05,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:33:05,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:33:05,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:33:08,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:33:08,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:33:08,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620845510] [2024-06-21 21:33:08,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620845510] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:33:08,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:33:08,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:33:08,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819593802] [2024-06-21 21:33:08,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:33:08,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:33:08,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:33:08,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:33:08,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:33:08,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:33:08,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 398 transitions, 6543 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) [2024-06-21 21:33:08,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:33:08,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:33:08,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:33:12,195 INFO L124 PetriNetUnfolderBase]: 7800/12267 cut-off events. [2024-06-21 21:33:12,195 INFO L125 PetriNetUnfolderBase]: For 601345/601352 co-relation queries the response was YES. [2024-06-21 21:33:12,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90006 conditions, 12267 events. 7800/12267 cut-off events. For 601345/601352 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 81243 event pairs, 2922 based on Foata normal form. 39/12302 useless extension candidates. Maximal degree in co-relation 89900. Up to 11441 conditions per place. [2024-06-21 21:33:12,328 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 360 selfloop transitions, 110 changer transitions 6/480 dead transitions. [2024-06-21 21:33:12,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 480 transitions, 8691 flow [2024-06-21 21:33:12,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:33:12,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:33:12,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 157 transitions. [2024-06-21 21:33:12,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3738095238095238 [2024-06-21 21:33:12,330 INFO L175 Difference]: Start difference. First operand has 222 places, 398 transitions, 6543 flow. Second operand 10 states and 157 transitions. [2024-06-21 21:33:12,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 480 transitions, 8691 flow [2024-06-21 21:33:13,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 480 transitions, 8372 flow, removed 55 selfloop flow, removed 6 redundant places. [2024-06-21 21:33:13,772 INFO L231 Difference]: Finished difference. Result has 229 places, 444 transitions, 7604 flow [2024-06-21 21:33:13,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6281, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7604, PETRI_PLACES=229, PETRI_TRANSITIONS=444} [2024-06-21 21:33:13,772 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 186 predicate places. [2024-06-21 21:33:13,773 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 444 transitions, 7604 flow [2024-06-21 21:33:13,773 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) [2024-06-21 21:33:13,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:33:13,773 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:33:13,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 21:33:13,773 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)] === [2024-06-21 21:33:13,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:33:13,774 INFO L85 PathProgramCache]: Analyzing trace with hash 458091411, now seen corresponding path program 2 times [2024-06-21 21:33:13,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:33:13,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020264744] [2024-06-21 21:33:13,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:33:13,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:33:13,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:33:16,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:33:16,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:33:16,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020264744] [2024-06-21 21:33:16,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020264744] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:33:16,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:33:16,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:33:16,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139408031] [2024-06-21 21:33:16,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:33:16,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:33:16,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:33:16,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:33:16,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:33:16,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:33:16,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 444 transitions, 7604 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) [2024-06-21 21:33:16,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:33:16,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:33:16,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:33:20,329 INFO L124 PetriNetUnfolderBase]: 7830/12331 cut-off events. [2024-06-21 21:33:20,329 INFO L125 PetriNetUnfolderBase]: For 587278/587283 co-relation queries the response was YES. [2024-06-21 21:33:20,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91309 conditions, 12331 events. 7830/12331 cut-off events. For 587278/587283 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 81796 event pairs, 2832 based on Foata normal form. 26/12353 useless extension candidates. Maximal degree in co-relation 91199. Up to 10439 conditions per place. [2024-06-21 21:33:20,445 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 290 selfloop transitions, 199 changer transitions 2/495 dead transitions. [2024-06-21 21:33:20,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 495 transitions, 9355 flow [2024-06-21 21:33:20,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:33:20,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:33:20,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-21 21:33:20,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3976190476190476 [2024-06-21 21:33:20,447 INFO L175 Difference]: Start difference. First operand has 229 places, 444 transitions, 7604 flow. Second operand 10 states and 167 transitions. [2024-06-21 21:33:20,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 495 transitions, 9355 flow [2024-06-21 21:33:21,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 495 transitions, 9278 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-06-21 21:33:21,600 INFO L231 Difference]: Finished difference. Result has 239 places, 463 transitions, 8448 flow [2024-06-21 21:33:21,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7531, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8448, PETRI_PLACES=239, PETRI_TRANSITIONS=463} [2024-06-21 21:33:21,601 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 196 predicate places. [2024-06-21 21:33:21,601 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 463 transitions, 8448 flow [2024-06-21 21:33:21,601 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) [2024-06-21 21:33:21,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:33:21,602 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:33:21,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 21:33:21,602 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)] === [2024-06-21 21:33:21,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:33:21,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1445330843, now seen corresponding path program 3 times [2024-06-21 21:33:21,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:33:21,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644142287] [2024-06-21 21:33:21,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:33:21,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:33:21,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:33:24,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:33:24,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:33:24,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644142287] [2024-06-21 21:33:24,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644142287] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:33:24,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:33:24,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:33:24,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269930100] [2024-06-21 21:33:24,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:33:24,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:33:24,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:33:24,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:33:24,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:33:24,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:33:24,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 463 transitions, 8448 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) [2024-06-21 21:33:24,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:33:24,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:33:24,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:33:28,064 INFO L124 PetriNetUnfolderBase]: 7758/12285 cut-off events. [2024-06-21 21:33:28,064 INFO L125 PetriNetUnfolderBase]: For 586165/586170 co-relation queries the response was YES. [2024-06-21 21:33:28,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91897 conditions, 12285 events. 7758/12285 cut-off events. For 586165/586170 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 81985 event pairs, 2729 based on Foata normal form. 10/12291 useless extension candidates. Maximal degree in co-relation 91782. Up to 10407 conditions per place. [2024-06-21 21:33:28,210 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 291 selfloop transitions, 191 changer transitions 4/490 dead transitions. [2024-06-21 21:33:28,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 490 transitions, 9605 flow [2024-06-21 21:33:28,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:33:28,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:33:28,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-21 21:33:28,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-21 21:33:28,211 INFO L175 Difference]: Start difference. First operand has 239 places, 463 transitions, 8448 flow. Second operand 9 states and 150 transitions. [2024-06-21 21:33:28,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 490 transitions, 9605 flow [2024-06-21 21:33:30,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 490 transitions, 9377 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-21 21:33:30,324 INFO L231 Difference]: Finished difference. Result has 244 places, 460 transitions, 8545 flow [2024-06-21 21:33:30,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8220, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8545, PETRI_PLACES=244, PETRI_TRANSITIONS=460} [2024-06-21 21:33:30,325 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 201 predicate places. [2024-06-21 21:33:30,325 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 460 transitions, 8545 flow [2024-06-21 21:33:30,325 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) [2024-06-21 21:33:30,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:33:30,325 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:33:30,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 21:33:30,325 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)] === [2024-06-21 21:33:30,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:33:30,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1445321915, now seen corresponding path program 1 times [2024-06-21 21:33:30,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:33:30,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663717659] [2024-06-21 21:33:30,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:33:30,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:33:30,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:33:34,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:33:34,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:33:34,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663717659] [2024-06-21 21:33:34,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663717659] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:33:34,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:33:34,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:33:34,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474687576] [2024-06-21 21:33:34,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:33:34,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:33:34,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:33:34,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:33:34,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:33:34,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:33:34,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 460 transitions, 8545 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) [2024-06-21 21:33:34,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:33:34,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:33:34,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:33:37,977 INFO L124 PetriNetUnfolderBase]: 7670/12149 cut-off events. [2024-06-21 21:33:37,977 INFO L125 PetriNetUnfolderBase]: For 606546/606554 co-relation queries the response was YES. [2024-06-21 21:33:38,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91240 conditions, 12149 events. 7670/12149 cut-off events. For 606546/606554 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 81091 event pairs, 2999 based on Foata normal form. 10/12156 useless extension candidates. Maximal degree in co-relation 91124. Up to 11731 conditions per place. [2024-06-21 21:33:38,125 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 452 selfloop transitions, 29 changer transitions 0/485 dead transitions. [2024-06-21 21:33:38,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 485 transitions, 9632 flow [2024-06-21 21:33:38,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:33:38,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:33:38,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-21 21:33:38,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36607142857142855 [2024-06-21 21:33:38,127 INFO L175 Difference]: Start difference. First operand has 244 places, 460 transitions, 8545 flow. Second operand 8 states and 123 transitions. [2024-06-21 21:33:38,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 485 transitions, 9632 flow [2024-06-21 21:33:39,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 485 transitions, 9332 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-21 21:33:39,978 INFO L231 Difference]: Finished difference. Result has 246 places, 462 transitions, 8365 flow [2024-06-21 21:33:39,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8245, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8365, PETRI_PLACES=246, PETRI_TRANSITIONS=462} [2024-06-21 21:33:39,979 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 203 predicate places. [2024-06-21 21:33:39,979 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 462 transitions, 8365 flow [2024-06-21 21:33:39,979 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) [2024-06-21 21:33:39,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:33:39,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:33:39,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 21:33:39,979 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)] === [2024-06-21 21:33:39,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:33:39,979 INFO L85 PathProgramCache]: Analyzing trace with hash -894070345, now seen corresponding path program 2 times [2024-06-21 21:33:39,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:33:39,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180734017] [2024-06-21 21:33:39,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:33:39,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:33:39,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:33:43,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:33:43,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:33:43,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180734017] [2024-06-21 21:33:43,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180734017] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:33:43,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:33:43,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:33:43,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529506040] [2024-06-21 21:33:43,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:33:43,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:33:43,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:33:43,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:33:43,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:33:43,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:33:43,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 462 transitions, 8365 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) [2024-06-21 21:33:43,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:33:43,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:33:43,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:33:47,019 INFO L124 PetriNetUnfolderBase]: 7744/12164 cut-off events. [2024-06-21 21:33:47,019 INFO L125 PetriNetUnfolderBase]: For 642014/642016 co-relation queries the response was YES. [2024-06-21 21:33:47,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91978 conditions, 12164 events. 7744/12164 cut-off events. For 642014/642016 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 80040 event pairs, 2173 based on Foata normal form. 2/12145 useless extension candidates. Maximal degree in co-relation 91861. Up to 8920 conditions per place. [2024-06-21 21:33:47,165 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 201 selfloop transitions, 322 changer transitions 0/527 dead transitions. [2024-06-21 21:33:47,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 527 transitions, 10471 flow [2024-06-21 21:33:47,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:33:47,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:33:47,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-21 21:33:47,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-21 21:33:47,166 INFO L175 Difference]: Start difference. First operand has 246 places, 462 transitions, 8365 flow. Second operand 8 states and 154 transitions. [2024-06-21 21:33:47,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 527 transitions, 10471 flow [2024-06-21 21:33:48,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 527 transitions, 10381 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-21 21:33:48,966 INFO L231 Difference]: Finished difference. Result has 251 places, 488 transitions, 9679 flow [2024-06-21 21:33:48,966 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8275, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=301, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9679, PETRI_PLACES=251, PETRI_TRANSITIONS=488} [2024-06-21 21:33:48,967 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 208 predicate places. [2024-06-21 21:33:48,967 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 488 transitions, 9679 flow [2024-06-21 21:33:48,967 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) [2024-06-21 21:33:48,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:33:48,967 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:33:48,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 21:33:48,968 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)] === [2024-06-21 21:33:48,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:33:48,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1522429407, now seen corresponding path program 3 times [2024-06-21 21:33:48,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:33:48,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870064660] [2024-06-21 21:33:48,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:33:48,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:33:48,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:33:52,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:33:52,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:33:52,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870064660] [2024-06-21 21:33:52,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870064660] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:33:52,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:33:52,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:33:52,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917628306] [2024-06-21 21:33:52,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:33:52,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:33:52,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:33:52,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:33:52,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:33:52,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:33:52,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 488 transitions, 9679 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) [2024-06-21 21:33:52,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:33:52,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:33:52,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:33:55,653 INFO L124 PetriNetUnfolderBase]: 7738/12180 cut-off events. [2024-06-21 21:33:55,653 INFO L125 PetriNetUnfolderBase]: For 686361/686363 co-relation queries the response was YES. [2024-06-21 21:33:55,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97128 conditions, 12180 events. 7738/12180 cut-off events. For 686361/686363 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 80604 event pairs, 2866 based on Foata normal form. 2/12165 useless extension candidates. Maximal degree in co-relation 97008. Up to 11292 conditions per place. [2024-06-21 21:33:55,779 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 373 selfloop transitions, 146 changer transitions 0/523 dead transitions. [2024-06-21 21:33:55,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 523 transitions, 11003 flow [2024-06-21 21:33:55,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:33:55,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:33:55,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-21 21:33:55,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4021164021164021 [2024-06-21 21:33:55,780 INFO L175 Difference]: Start difference. First operand has 251 places, 488 transitions, 9679 flow. Second operand 9 states and 152 transitions. [2024-06-21 21:33:55,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 523 transitions, 11003 flow [2024-06-21 21:33:57,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 523 transitions, 10845 flow, removed 78 selfloop flow, removed 1 redundant places. [2024-06-21 21:33:57,541 INFO L231 Difference]: Finished difference. Result has 260 places, 490 transitions, 9921 flow [2024-06-21 21:33:57,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9531, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9921, PETRI_PLACES=260, PETRI_TRANSITIONS=490} [2024-06-21 21:33:57,542 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 217 predicate places. [2024-06-21 21:33:57,542 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 490 transitions, 9921 flow [2024-06-21 21:33:57,542 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) [2024-06-21 21:33:57,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:33:57,542 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:33:57,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 21:33:57,542 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)] === [2024-06-21 21:33:57,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:33:57,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1121851339, now seen corresponding path program 4 times [2024-06-21 21:33:57,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:33:57,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967181965] [2024-06-21 21:33:57,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:33:57,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:33:57,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:34:00,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:34:00,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:34:00,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967181965] [2024-06-21 21:34:00,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967181965] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:34:00,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:34:00,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:34:00,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303954383] [2024-06-21 21:34:00,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:34:00,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:34:00,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:34:00,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:34:00,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:34:00,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:34:00,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 490 transitions, 9921 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) [2024-06-21 21:34:00,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:34:00,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:34:00,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:34:04,436 INFO L124 PetriNetUnfolderBase]: 7658/12093 cut-off events. [2024-06-21 21:34:04,436 INFO L125 PetriNetUnfolderBase]: For 695033/695035 co-relation queries the response was YES. [2024-06-21 21:34:04,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95503 conditions, 12093 events. 7658/12093 cut-off events. For 695033/695035 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 80199 event pairs, 2922 based on Foata normal form. 12/12088 useless extension candidates. Maximal degree in co-relation 95379. Up to 11345 conditions per place. [2024-06-21 21:34:04,602 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 382 selfloop transitions, 125 changer transitions 6/517 dead transitions. [2024-06-21 21:34:04,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 517 transitions, 11039 flow [2024-06-21 21:34:04,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:34:04,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:34:04,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-21 21:34:04,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835978835978836 [2024-06-21 21:34:04,604 INFO L175 Difference]: Start difference. First operand has 260 places, 490 transitions, 9921 flow. Second operand 9 states and 145 transitions. [2024-06-21 21:34:04,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 517 transitions, 11039 flow [2024-06-21 21:34:06,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 517 transitions, 10683 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-21 21:34:06,666 INFO L231 Difference]: Finished difference. Result has 264 places, 486 transitions, 9720 flow [2024-06-21 21:34:06,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9565, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9720, PETRI_PLACES=264, PETRI_TRANSITIONS=486} [2024-06-21 21:34:06,667 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 221 predicate places. [2024-06-21 21:34:06,667 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 486 transitions, 9720 flow [2024-06-21 21:34:06,667 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) [2024-06-21 21:34:06,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:34:06,667 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:34:06,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 21:34:06,667 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)] === [2024-06-21 21:34:06,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:34:06,667 INFO L85 PathProgramCache]: Analyzing trace with hash -882642505, now seen corresponding path program 4 times [2024-06-21 21:34:06,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:34:06,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626708774] [2024-06-21 21:34:06,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:34:06,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:34:06,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:34:09,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:34:09,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:34:09,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626708774] [2024-06-21 21:34:09,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626708774] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:34:09,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:34:09,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:34:09,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176659658] [2024-06-21 21:34:09,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:34:09,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:34:09,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:34:09,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:34:09,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:34:09,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:34:09,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 486 transitions, 9720 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) [2024-06-21 21:34:09,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:34:09,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:34:09,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:34:13,334 INFO L124 PetriNetUnfolderBase]: 7580/11931 cut-off events. [2024-06-21 21:34:13,334 INFO L125 PetriNetUnfolderBase]: For 703114/703116 co-relation queries the response was YES. [2024-06-21 21:34:13,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94519 conditions, 11931 events. 7580/11931 cut-off events. For 703114/703116 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 78497 event pairs, 2182 based on Foata normal form. 2/11912 useless extension candidates. Maximal degree in co-relation 94393. Up to 8837 conditions per place. [2024-06-21 21:34:13,489 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 193 selfloop transitions, 323 changer transitions 0/520 dead transitions. [2024-06-21 21:34:13,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 520 transitions, 11182 flow [2024-06-21 21:34:13,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:34:13,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:34:13,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-21 21:34:13,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-21 21:34:13,491 INFO L175 Difference]: Start difference. First operand has 264 places, 486 transitions, 9720 flow. Second operand 8 states and 148 transitions. [2024-06-21 21:34:13,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 520 transitions, 11182 flow [2024-06-21 21:34:15,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 520 transitions, 10855 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-21 21:34:15,515 INFO L231 Difference]: Finished difference. Result has 266 places, 487 transitions, 10075 flow [2024-06-21 21:34:15,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9393, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=322, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10075, PETRI_PLACES=266, PETRI_TRANSITIONS=487} [2024-06-21 21:34:15,515 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 223 predicate places. [2024-06-21 21:34:15,516 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 487 transitions, 10075 flow [2024-06-21 21:34:15,516 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) [2024-06-21 21:34:15,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:34:15,516 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:34:15,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 21:34:15,516 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)] === [2024-06-21 21:34:15,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:34:15,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1924931075, now seen corresponding path program 5 times [2024-06-21 21:34:15,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:34:15,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409409945] [2024-06-21 21:34:15,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:34:15,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:34:15,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:34:18,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:34:18,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:34:18,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409409945] [2024-06-21 21:34:18,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409409945] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:34:18,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:34:18,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:34:18,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160005245] [2024-06-21 21:34:18,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:34:18,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:34:18,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:34:18,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:34:18,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:34:18,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:34:18,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 487 transitions, 10075 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) [2024-06-21 21:34:18,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:34:18,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:34:18,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:34:21,841 INFO L124 PetriNetUnfolderBase]: 7813/12265 cut-off events. [2024-06-21 21:34:21,841 INFO L125 PetriNetUnfolderBase]: For 772099/772101 co-relation queries the response was YES. [2024-06-21 21:34:21,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100367 conditions, 12265 events. 7813/12265 cut-off events. For 772099/772101 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 80604 event pairs, 2782 based on Foata normal form. 6/12254 useless extension candidates. Maximal degree in co-relation 100240. Up to 11081 conditions per place. [2024-06-21 21:34:21,997 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 346 selfloop transitions, 188 changer transitions 0/538 dead transitions. [2024-06-21 21:34:21,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 538 transitions, 11955 flow [2024-06-21 21:34:21,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:34:21,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:34:21,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-21 21:34:21,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-06-21 21:34:21,999 INFO L175 Difference]: Start difference. First operand has 266 places, 487 transitions, 10075 flow. Second operand 9 states and 151 transitions. [2024-06-21 21:34:21,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 538 transitions, 11955 flow [2024-06-21 21:34:24,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 538 transitions, 11315 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-21 21:34:24,059 INFO L231 Difference]: Finished difference. Result has 272 places, 512 transitions, 10488 flow [2024-06-21 21:34:24,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9469, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10488, PETRI_PLACES=272, PETRI_TRANSITIONS=512} [2024-06-21 21:34:24,060 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 229 predicate places. [2024-06-21 21:34:24,060 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 512 transitions, 10488 flow [2024-06-21 21:34:24,060 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) [2024-06-21 21:34:24,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:34:24,060 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:34:24,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 21:34:24,060 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)] === [2024-06-21 21:34:24,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:34:24,061 INFO L85 PathProgramCache]: Analyzing trace with hash -1924752329, now seen corresponding path program 5 times [2024-06-21 21:34:24,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:34:24,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296645034] [2024-06-21 21:34:24,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:34:24,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:34:24,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:34:27,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:34:27,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:34:27,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296645034] [2024-06-21 21:34:27,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296645034] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:34:27,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:34:27,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:34:27,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510824714] [2024-06-21 21:34:27,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:34:27,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:34:27,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:34:27,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:34:27,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:34:27,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:34:27,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 512 transitions, 10488 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) [2024-06-21 21:34:27,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:34:27,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:34:27,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:34:30,687 INFO L124 PetriNetUnfolderBase]: 7795/12245 cut-off events. [2024-06-21 21:34:30,687 INFO L125 PetriNetUnfolderBase]: For 781894/781896 co-relation queries the response was YES. [2024-06-21 21:34:30,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99753 conditions, 12245 events. 7795/12245 cut-off events. For 781894/781896 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 80611 event pairs, 2791 based on Foata normal form. 6/12234 useless extension candidates. Maximal degree in co-relation 99623. Up to 11070 conditions per place. [2024-06-21 21:34:30,857 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 346 selfloop transitions, 188 changer transitions 0/538 dead transitions. [2024-06-21 21:34:30,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 538 transitions, 11838 flow [2024-06-21 21:34:30,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:34:30,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:34:30,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-21 21:34:30,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-06-21 21:34:30,859 INFO L175 Difference]: Start difference. First operand has 272 places, 512 transitions, 10488 flow. Second operand 9 states and 151 transitions. [2024-06-21 21:34:30,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 538 transitions, 11838 flow [2024-06-21 21:34:33,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 538 transitions, 11525 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-21 21:34:33,174 INFO L231 Difference]: Finished difference. Result has 276 places, 512 transitions, 10558 flow [2024-06-21 21:34:33,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10175, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10558, PETRI_PLACES=276, PETRI_TRANSITIONS=512} [2024-06-21 21:34:33,175 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 233 predicate places. [2024-06-21 21:34:33,175 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 512 transitions, 10558 flow [2024-06-21 21:34:33,175 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) [2024-06-21 21:34:33,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:34:33,175 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:34:33,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 21:34:33,175 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)] === [2024-06-21 21:34:33,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:34:33,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1925168039, now seen corresponding path program 6 times [2024-06-21 21:34:33,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:34:33,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286711608] [2024-06-21 21:34:33,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:34:33,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:34:33,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:34:36,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:34:36,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:34:36,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286711608] [2024-06-21 21:34:36,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286711608] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:34:36,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:34:36,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:34:36,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85136567] [2024-06-21 21:34:36,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:34:36,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:34:36,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:34:36,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:34:36,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:34:36,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:34:36,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 512 transitions, 10558 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) [2024-06-21 21:34:36,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:34:36,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:34:36,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:34:40,572 INFO L124 PetriNetUnfolderBase]: 7769/12273 cut-off events. [2024-06-21 21:34:40,572 INFO L125 PetriNetUnfolderBase]: For 797844/797846 co-relation queries the response was YES. [2024-06-21 21:34:40,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99507 conditions, 12273 events. 7769/12273 cut-off events. For 797844/797846 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 81453 event pairs, 2954 based on Foata normal form. 6/12262 useless extension candidates. Maximal degree in co-relation 99378. Up to 11545 conditions per place. [2024-06-21 21:34:40,720 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 401 selfloop transitions, 126 changer transitions 3/534 dead transitions. [2024-06-21 21:34:40,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 534 transitions, 11680 flow [2024-06-21 21:34:40,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:34:40,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:34:40,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-21 21:34:40,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37566137566137564 [2024-06-21 21:34:40,721 INFO L175 Difference]: Start difference. First operand has 276 places, 512 transitions, 10558 flow. Second operand 9 states and 142 transitions. [2024-06-21 21:34:40,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 534 transitions, 11680 flow [2024-06-21 21:34:42,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 534 transitions, 11307 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-21 21:34:42,805 INFO L231 Difference]: Finished difference. Result has 279 places, 510 transitions, 10397 flow [2024-06-21 21:34:42,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10185, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=386, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10397, PETRI_PLACES=279, PETRI_TRANSITIONS=510} [2024-06-21 21:34:42,806 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 236 predicate places. [2024-06-21 21:34:42,806 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 510 transitions, 10397 flow [2024-06-21 21:34:42,806 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) [2024-06-21 21:34:42,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:34:42,806 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:34:42,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 21:34:42,806 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)] === [2024-06-21 21:34:42,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:34:42,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1480621327, now seen corresponding path program 7 times [2024-06-21 21:34:42,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:34:42,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081634783] [2024-06-21 21:34:42,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:34:42,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:34:42,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:34:46,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:34:46,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:34:46,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081634783] [2024-06-21 21:34:46,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081634783] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:34:46,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:34:46,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:34:46,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480419542] [2024-06-21 21:34:46,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:34:46,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:34:46,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:34:46,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:34:46,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:34:46,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:34:46,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 510 transitions, 10397 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) [2024-06-21 21:34:46,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:34:46,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:34:46,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:34:50,398 INFO L124 PetriNetUnfolderBase]: 7661/12085 cut-off events. [2024-06-21 21:34:50,398 INFO L125 PetriNetUnfolderBase]: For 817100/817105 co-relation queries the response was YES. [2024-06-21 21:34:50,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96639 conditions, 12085 events. 7661/12085 cut-off events. For 817100/817105 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 80005 event pairs, 2660 based on Foata normal form. 26/12107 useless extension candidates. Maximal degree in co-relation 96509. Up to 9831 conditions per place. [2024-06-21 21:34:50,550 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 272 selfloop transitions, 274 changer transitions 6/556 dead transitions. [2024-06-21 21:34:50,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 556 transitions, 11930 flow [2024-06-21 21:34:50,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:34:50,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:34:50,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-21 21:34:50,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-21 21:34:50,551 INFO L175 Difference]: Start difference. First operand has 279 places, 510 transitions, 10397 flow. Second operand 9 states and 169 transitions. [2024-06-21 21:34:50,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 556 transitions, 11930 flow [2024-06-21 21:34:52,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 556 transitions, 11634 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-21 21:34:52,601 INFO L231 Difference]: Finished difference. Result has 282 places, 508 transitions, 10622 flow [2024-06-21 21:34:52,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10101, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=271, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10622, PETRI_PLACES=282, PETRI_TRANSITIONS=508} [2024-06-21 21:34:52,602 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 239 predicate places. [2024-06-21 21:34:52,602 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 508 transitions, 10622 flow [2024-06-21 21:34:52,602 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) [2024-06-21 21:34:52,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:34:52,602 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:34:52,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 21:34:52,602 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)] === [2024-06-21 21:34:52,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:34:52,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1633680231, now seen corresponding path program 8 times [2024-06-21 21:34:52,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:34:52,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556025801] [2024-06-21 21:34:52,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:34:52,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:34:52,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:34:55,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:34:55,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:34:55,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556025801] [2024-06-21 21:34:55,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556025801] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:34:55,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:34:55,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:34:55,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375096329] [2024-06-21 21:34:55,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:34:55,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:34:55,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:34:55,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:34:55,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:34:55,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:34:55,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 508 transitions, 10622 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) [2024-06-21 21:34:55,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:34:55,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:34:55,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:34:59,177 INFO L124 PetriNetUnfolderBase]: 7449/11808 cut-off events. [2024-06-21 21:34:59,178 INFO L125 PetriNetUnfolderBase]: For 806675/806680 co-relation queries the response was YES. [2024-06-21 21:34:59,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95579 conditions, 11808 events. 7449/11808 cut-off events. For 806675/806680 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 78376 event pairs, 2615 based on Foata normal form. 6/11810 useless extension candidates. Maximal degree in co-relation 95448. Up to 9627 conditions per place. [2024-06-21 21:34:59,329 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 289 selfloop transitions, 242 changer transitions 2/537 dead transitions. [2024-06-21 21:34:59,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 537 transitions, 11880 flow [2024-06-21 21:34:59,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:34:59,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:34:59,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-21 21:34:59,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-21 21:34:59,330 INFO L175 Difference]: Start difference. First operand has 282 places, 508 transitions, 10622 flow. Second operand 8 states and 142 transitions. [2024-06-21 21:34:59,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 537 transitions, 11880 flow [2024-06-21 21:35:01,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 537 transitions, 11410 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-21 21:35:01,782 INFO L231 Difference]: Finished difference. Result has 283 places, 506 transitions, 10618 flow [2024-06-21 21:35:01,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10156, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=242, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10618, PETRI_PLACES=283, PETRI_TRANSITIONS=506} [2024-06-21 21:35:01,782 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 240 predicate places. [2024-06-21 21:35:01,783 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 506 transitions, 10618 flow [2024-06-21 21:35:01,783 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) [2024-06-21 21:35:01,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:35:01,783 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:35:01,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 21:35:01,783 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)] === [2024-06-21 21:35:01,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:35:01,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1181206223, now seen corresponding path program 9 times [2024-06-21 21:35:01,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:35:01,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153834024] [2024-06-21 21:35:01,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:35:01,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:35:01,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:35:04,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:35:04,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:35:04,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153834024] [2024-06-21 21:35:04,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153834024] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:35:04,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:35:04,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:35:04,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622058796] [2024-06-21 21:35:04,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:35:04,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:35:04,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:35:04,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:35:04,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:35:04,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:35:04,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 506 transitions, 10618 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) [2024-06-21 21:35:04,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:35:04,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:35:04,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:35:07,979 INFO L124 PetriNetUnfolderBase]: 7243/11486 cut-off events. [2024-06-21 21:35:07,979 INFO L125 PetriNetUnfolderBase]: For 781229/781265 co-relation queries the response was YES. [2024-06-21 21:35:08,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93727 conditions, 11486 events. 7243/11486 cut-off events. For 781229/781265 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 75636 event pairs, 2027 based on Foata normal form. 14/11478 useless extension candidates. Maximal degree in co-relation 93596. Up to 8645 conditions per place. [2024-06-21 21:35:08,121 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 232 selfloop transitions, 302 changer transitions 0/538 dead transitions. [2024-06-21 21:35:08,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 538 transitions, 12231 flow [2024-06-21 21:35:08,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:35:08,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:35:08,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-21 21:35:08,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-21 21:35:08,123 INFO L175 Difference]: Start difference. First operand has 283 places, 506 transitions, 10618 flow. Second operand 8 states and 139 transitions. [2024-06-21 21:35:08,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 538 transitions, 12231 flow [2024-06-21 21:35:10,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 538 transitions, 11611 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-21 21:35:10,144 INFO L231 Difference]: Finished difference. Result has 282 places, 512 transitions, 10726 flow [2024-06-21 21:35:10,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10004, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=297, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10726, PETRI_PLACES=282, PETRI_TRANSITIONS=512} [2024-06-21 21:35:10,145 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 239 predicate places. [2024-06-21 21:35:10,145 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 512 transitions, 10726 flow [2024-06-21 21:35:10,145 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) [2024-06-21 21:35:10,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:35:10,145 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:35:10,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 21:35:10,146 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)] === [2024-06-21 21:35:10,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:35:10,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1175492303, now seen corresponding path program 10 times [2024-06-21 21:35:10,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:35:10,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648307759] [2024-06-21 21:35:10,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:35:10,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:35:10,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:35:13,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:35:13,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:35:13,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648307759] [2024-06-21 21:35:13,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648307759] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:35:13,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:35:13,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:35:13,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364578719] [2024-06-21 21:35:13,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:35:13,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:35:13,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:35:13,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:35:13,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:35:13,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:35:13,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 512 transitions, 10726 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) [2024-06-21 21:35:13,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:35:13,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:35:13,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:35:16,778 INFO L124 PetriNetUnfolderBase]: 7231/11456 cut-off events. [2024-06-21 21:35:16,778 INFO L125 PetriNetUnfolderBase]: For 776512/776548 co-relation queries the response was YES. [2024-06-21 21:35:16,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93559 conditions, 11456 events. 7231/11456 cut-off events. For 776512/776548 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 75375 event pairs, 2013 based on Foata normal form. 16/11450 useless extension candidates. Maximal degree in co-relation 93428. Up to 8641 conditions per place. [2024-06-21 21:35:16,927 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 246 selfloop transitions, 289 changer transitions 0/539 dead transitions. [2024-06-21 21:35:16,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 539 transitions, 12233 flow [2024-06-21 21:35:16,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:35:16,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:35:16,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-21 21:35:16,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-21 21:35:16,929 INFO L175 Difference]: Start difference. First operand has 282 places, 512 transitions, 10726 flow. Second operand 8 states and 142 transitions. [2024-06-21 21:35:16,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 539 transitions, 12233 flow [2024-06-21 21:35:18,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 539 transitions, 11750 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-21 21:35:18,848 INFO L231 Difference]: Finished difference. Result has 286 places, 512 transitions, 10829 flow [2024-06-21 21:35:18,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10243, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=289, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10829, PETRI_PLACES=286, PETRI_TRANSITIONS=512} [2024-06-21 21:35:18,849 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 243 predicate places. [2024-06-21 21:35:18,849 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 512 transitions, 10829 flow [2024-06-21 21:35:18,849 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) [2024-06-21 21:35:18,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:35:18,849 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:35:18,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 21:35:18,849 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)] === [2024-06-21 21:35:18,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:35:18,850 INFO L85 PathProgramCache]: Analyzing trace with hash 953126327, now seen corresponding path program 6 times [2024-06-21 21:35:18,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:35:18,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938708938] [2024-06-21 21:35:18,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:35:18,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:35:18,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:35:21,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:35:21,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:35:21,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938708938] [2024-06-21 21:35:21,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938708938] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:35:21,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:35:21,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:35:21,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031193520] [2024-06-21 21:35:21,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:35:21,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:35:21,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:35:21,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:35:21,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:35:21,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:35:21,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 512 transitions, 10829 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) [2024-06-21 21:35:21,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:35:21,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:35:21,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:35:25,578 INFO L124 PetriNetUnfolderBase]: 7213/11391 cut-off events. [2024-06-21 21:35:25,579 INFO L125 PetriNetUnfolderBase]: For 796325/796327 co-relation queries the response was YES. [2024-06-21 21:35:25,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93542 conditions, 11391 events. 7213/11391 cut-off events. For 796325/796327 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 74559 event pairs, 1901 based on Foata normal form. 6/11380 useless extension candidates. Maximal degree in co-relation 93410. Up to 8636 conditions per place. [2024-06-21 21:35:25,705 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 192 selfloop transitions, 359 changer transitions 0/555 dead transitions. [2024-06-21 21:35:25,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 555 transitions, 12432 flow [2024-06-21 21:35:25,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:35:25,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:35:25,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-21 21:35:25,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455026455026455 [2024-06-21 21:35:25,706 INFO L175 Difference]: Start difference. First operand has 286 places, 512 transitions, 10829 flow. Second operand 9 states and 172 transitions. [2024-06-21 21:35:25,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 555 transitions, 12432 flow [2024-06-21 21:35:27,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 555 transitions, 11796 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-21 21:35:27,707 INFO L231 Difference]: Finished difference. Result has 290 places, 513 transitions, 11088 flow [2024-06-21 21:35:27,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10193, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=358, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11088, PETRI_PLACES=290, PETRI_TRANSITIONS=513} [2024-06-21 21:35:27,707 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 247 predicate places. [2024-06-21 21:35:27,708 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 513 transitions, 11088 flow [2024-06-21 21:35:27,708 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) [2024-06-21 21:35:27,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:35:27,708 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:35:27,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 21:35:27,708 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)] === [2024-06-21 21:35:27,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:35:27,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1625697101, now seen corresponding path program 11 times [2024-06-21 21:35:27,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:35:27,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315482336] [2024-06-21 21:35:27,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:35:27,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:35:27,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:35:30,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:35:30,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:35:30,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315482336] [2024-06-21 21:35:30,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315482336] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:35:30,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:35:30,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:35:30,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332022843] [2024-06-21 21:35:30,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:35:30,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:35:30,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:35:30,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:35:30,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:35:30,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:35:30,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 513 transitions, 11088 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) [2024-06-21 21:35:30,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:35:30,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:35:30,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:35:34,108 INFO L124 PetriNetUnfolderBase]: 7183/11346 cut-off events. [2024-06-21 21:35:34,108 INFO L125 PetriNetUnfolderBase]: For 814989/814991 co-relation queries the response was YES. [2024-06-21 21:35:34,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94328 conditions, 11346 events. 7183/11346 cut-off events. For 814989/814991 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 74269 event pairs, 1908 based on Foata normal form. 6/11335 useless extension candidates. Maximal degree in co-relation 94194. Up to 8620 conditions per place. [2024-06-21 21:35:34,265 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 192 selfloop transitions, 355 changer transitions 0/551 dead transitions. [2024-06-21 21:35:34,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 551 transitions, 12634 flow [2024-06-21 21:35:34,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:35:34,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:35:34,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-21 21:35:34,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 21:35:34,266 INFO L175 Difference]: Start difference. First operand has 290 places, 513 transitions, 11088 flow. Second operand 9 states and 168 transitions. [2024-06-21 21:35:34,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 551 transitions, 12634 flow [2024-06-21 21:35:36,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 551 transitions, 12026 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-21 21:35:36,706 INFO L231 Difference]: Finished difference. Result has 292 places, 513 transitions, 11208 flow [2024-06-21 21:35:36,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10486, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=355, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11208, PETRI_PLACES=292, PETRI_TRANSITIONS=513} [2024-06-21 21:35:36,707 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 249 predicate places. [2024-06-21 21:35:36,707 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 513 transitions, 11208 flow [2024-06-21 21:35:36,707 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) [2024-06-21 21:35:36,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:35:36,707 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:35:36,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 21:35:36,707 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)] === [2024-06-21 21:35:36,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:35:36,708 INFO L85 PathProgramCache]: Analyzing trace with hash 780399473, now seen corresponding path program 12 times [2024-06-21 21:35:36,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:35:36,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530082058] [2024-06-21 21:35:36,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:35:36,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:35:36,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:35:39,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:35:39,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:35:39,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530082058] [2024-06-21 21:35:39,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530082058] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:35:39,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:35:39,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:35:39,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622617392] [2024-06-21 21:35:39,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:35:39,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:35:39,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:35:39,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:35:39,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:35:39,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:35:39,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 513 transitions, 11208 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) [2024-06-21 21:35:39,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:35:39,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:35:39,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:35:43,161 INFO L124 PetriNetUnfolderBase]: 6981/10957 cut-off events. [2024-06-21 21:35:43,161 INFO L125 PetriNetUnfolderBase]: For 806143/806145 co-relation queries the response was YES. [2024-06-21 21:35:43,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92330 conditions, 10957 events. 6981/10957 cut-off events. For 806143/806145 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 70860 event pairs, 2544 based on Foata normal form. 6/10946 useless extension candidates. Maximal degree in co-relation 92195. Up to 10187 conditions per place. [2024-06-21 21:35:43,330 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 388 selfloop transitions, 144 changer transitions 6/542 dead transitions. [2024-06-21 21:35:43,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 542 transitions, 12372 flow [2024-06-21 21:35:43,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:35:43,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:35:43,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-21 21:35:43,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-21 21:35:43,332 INFO L175 Difference]: Start difference. First operand has 292 places, 513 transitions, 11208 flow. Second operand 8 states and 139 transitions. [2024-06-21 21:35:43,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 542 transitions, 12372 flow [2024-06-21 21:35:45,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 542 transitions, 11567 flow, removed 10 selfloop flow, removed 10 redundant places. [2024-06-21 21:35:45,922 INFO L231 Difference]: Finished difference. Result has 290 places, 508 transitions, 10599 flow [2024-06-21 21:35:45,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10403, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10599, PETRI_PLACES=290, PETRI_TRANSITIONS=508} [2024-06-21 21:35:45,923 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 247 predicate places. [2024-06-21 21:35:45,923 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 508 transitions, 10599 flow [2024-06-21 21:35:45,923 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) [2024-06-21 21:35:45,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:35:45,923 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] [2024-06-21 21:35:45,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 21:35:45,923 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)] === [2024-06-21 21:35:45,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:35:45,923 INFO L85 PathProgramCache]: Analyzing trace with hash 776003921, now seen corresponding path program 2 times [2024-06-21 21:35:45,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:35:45,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794983456] [2024-06-21 21:35:45,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:35:45,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:35:45,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:35:50,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:35:50,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:35:50,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794983456] [2024-06-21 21:35:50,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794983456] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:35:50,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:35:50,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:35:50,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512347608] [2024-06-21 21:35:50,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:35:50,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:35:50,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:35:50,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:35:50,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:35:50,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:35:50,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 508 transitions, 10599 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) [2024-06-21 21:35:50,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:35:50,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:35:50,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:35:53,067 INFO L124 PetriNetUnfolderBase]: 6476/10143 cut-off events. [2024-06-21 21:35:53,067 INFO L125 PetriNetUnfolderBase]: For 778370/778378 co-relation queries the response was YES. [2024-06-21 21:35:53,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86958 conditions, 10143 events. 6476/10143 cut-off events. For 778370/778378 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 64361 event pairs, 2310 based on Foata normal form. 10/10150 useless extension candidates. Maximal degree in co-relation 86823. Up to 9817 conditions per place. [2024-06-21 21:35:53,212 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 495 selfloop transitions, 33 changer transitions 0/532 dead transitions. [2024-06-21 21:35:53,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 532 transitions, 11780 flow [2024-06-21 21:35:53,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:35:53,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:35:53,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-21 21:35:53,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-21 21:35:53,214 INFO L175 Difference]: Start difference. First operand has 290 places, 508 transitions, 10599 flow. Second operand 7 states and 112 transitions. [2024-06-21 21:35:53,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 532 transitions, 11780 flow [2024-06-21 21:35:55,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 532 transitions, 11376 flow, removed 4 selfloop flow, removed 11 redundant places. [2024-06-21 21:35:55,382 INFO L231 Difference]: Finished difference. Result has 286 places, 510 transitions, 10328 flow [2024-06-21 21:35:55,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10195, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=475, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10328, PETRI_PLACES=286, PETRI_TRANSITIONS=510} [2024-06-21 21:35:55,383 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 243 predicate places. [2024-06-21 21:35:55,383 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 510 transitions, 10328 flow [2024-06-21 21:35:55,383 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) [2024-06-21 21:35:55,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:35:55,383 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:35:55,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 21:35:55,383 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)] === [2024-06-21 21:35:55,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:35:55,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1175904851, now seen corresponding path program 3 times [2024-06-21 21:35:55,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:35:55,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971326839] [2024-06-21 21:35:55,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:35:55,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:35:55,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:35:59,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:35:59,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:35:59,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971326839] [2024-06-21 21:35:59,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971326839] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:35:59,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:35:59,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:35:59,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68520588] [2024-06-21 21:35:59,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:35:59,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:35:59,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:35:59,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:35:59,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:35:59,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:35:59,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 510 transitions, 10328 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) [2024-06-21 21:35:59,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:35:59,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:35:59,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:36:02,346 INFO L124 PetriNetUnfolderBase]: 6484/10193 cut-off events. [2024-06-21 21:36:02,346 INFO L125 PetriNetUnfolderBase]: For 749176/749197 co-relation queries the response was YES. [2024-06-21 21:36:02,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85777 conditions, 10193 events. 6484/10193 cut-off events. For 749176/749197 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 65057 event pairs, 2259 based on Foata normal form. 16/10201 useless extension candidates. Maximal degree in co-relation 85645. Up to 9823 conditions per place. [2024-06-21 21:36:02,488 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 490 selfloop transitions, 34 changer transitions 0/528 dead transitions. [2024-06-21 21:36:02,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 528 transitions, 11487 flow [2024-06-21 21:36:02,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:36:02,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:36:02,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 106 transitions. [2024-06-21 21:36:02,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36054421768707484 [2024-06-21 21:36:02,489 INFO L175 Difference]: Start difference. First operand has 286 places, 510 transitions, 10328 flow. Second operand 7 states and 106 transitions. [2024-06-21 21:36:02,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 528 transitions, 11487 flow [2024-06-21 21:36:04,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 528 transitions, 11386 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-21 21:36:04,754 INFO L231 Difference]: Finished difference. Result has 288 places, 512 transitions, 10364 flow [2024-06-21 21:36:04,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10227, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=476, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10364, PETRI_PLACES=288, PETRI_TRANSITIONS=512} [2024-06-21 21:36:04,754 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 245 predicate places. [2024-06-21 21:36:04,754 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 512 transitions, 10364 flow [2024-06-21 21:36:04,754 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) [2024-06-21 21:36:04,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:36:04,754 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:36:04,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 21:36:04,755 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)] === [2024-06-21 21:36:04,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:36:04,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1189786031, now seen corresponding path program 4 times [2024-06-21 21:36:04,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:36:04,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445947125] [2024-06-21 21:36:04,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:36:04,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:36:04,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:36:08,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:36:08,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:36:08,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445947125] [2024-06-21 21:36:08,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445947125] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:36:08,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:36:08,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:36:08,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058937818] [2024-06-21 21:36:08,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:36:08,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:36:08,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:36:08,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:36:08,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:36:09,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:36:09,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 512 transitions, 10364 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) [2024-06-21 21:36:09,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:36:09,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:36:09,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:36:11,729 INFO L124 PetriNetUnfolderBase]: 6479/10186 cut-off events. [2024-06-21 21:36:11,729 INFO L125 PetriNetUnfolderBase]: For 769515/769536 co-relation queries the response was YES. [2024-06-21 21:36:11,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86056 conditions, 10186 events. 6479/10186 cut-off events. For 769515/769536 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 64929 event pairs, 2234 based on Foata normal form. 16/10194 useless extension candidates. Maximal degree in co-relation 85923. Up to 9788 conditions per place. [2024-06-21 21:36:11,866 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 485 selfloop transitions, 41 changer transitions 0/530 dead transitions. [2024-06-21 21:36:11,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 530 transitions, 11531 flow [2024-06-21 21:36:11,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:36:11,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:36:11,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 106 transitions. [2024-06-21 21:36:11,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36054421768707484 [2024-06-21 21:36:11,868 INFO L175 Difference]: Start difference. First operand has 288 places, 512 transitions, 10364 flow. Second operand 7 states and 106 transitions. [2024-06-21 21:36:11,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 530 transitions, 11531 flow [2024-06-21 21:36:14,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 530 transitions, 11410 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-21 21:36:14,156 INFO L231 Difference]: Finished difference. Result has 290 places, 514 transitions, 10398 flow [2024-06-21 21:36:14,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10243, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=471, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10398, PETRI_PLACES=290, PETRI_TRANSITIONS=514} [2024-06-21 21:36:14,156 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 247 predicate places. [2024-06-21 21:36:14,157 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 514 transitions, 10398 flow [2024-06-21 21:36:14,157 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) [2024-06-21 21:36:14,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:36:14,157 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:36:14,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 21:36:14,157 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)] === [2024-06-21 21:36:14,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:36:14,158 INFO L85 PathProgramCache]: Analyzing trace with hash -885490537, now seen corresponding path program 1 times [2024-06-21 21:36:14,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:36:14,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920490200] [2024-06-21 21:36:14,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:36:14,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:36:14,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:36:17,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:36:17,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:36:17,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920490200] [2024-06-21 21:36:17,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920490200] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:36:17,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:36:17,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:36:17,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143526326] [2024-06-21 21:36:17,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:36:17,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:36:17,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:36:17,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:36:17,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:36:17,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:36:17,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 514 transitions, 10398 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) [2024-06-21 21:36:17,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:36:17,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:36:17,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:36:20,694 INFO L124 PetriNetUnfolderBase]: 6559/10289 cut-off events. [2024-06-21 21:36:20,694 INFO L125 PetriNetUnfolderBase]: For 817448/817450 co-relation queries the response was YES. [2024-06-21 21:36:20,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87824 conditions, 10289 events. 6559/10289 cut-off events. For 817448/817450 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 65556 event pairs, 2274 based on Foata normal form. 2/10288 useless extension candidates. Maximal degree in co-relation 87690. Up to 9717 conditions per place. [2024-06-21 21:36:20,825 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 502 selfloop transitions, 49 changer transitions 0/555 dead transitions. [2024-06-21 21:36:20,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 555 transitions, 11852 flow [2024-06-21 21:36:20,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:36:20,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:36:20,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-21 21:36:20,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-21 21:36:20,826 INFO L175 Difference]: Start difference. First operand has 290 places, 514 transitions, 10398 flow. Second operand 8 states and 143 transitions. [2024-06-21 21:36:20,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 555 transitions, 11852 flow [2024-06-21 21:36:22,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 555 transitions, 11713 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-21 21:36:22,846 INFO L231 Difference]: Finished difference. Result has 293 places, 518 transitions, 10474 flow [2024-06-21 21:36:22,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10259, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10474, PETRI_PLACES=293, PETRI_TRANSITIONS=518} [2024-06-21 21:36:22,846 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 250 predicate places. [2024-06-21 21:36:22,846 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 518 transitions, 10474 flow [2024-06-21 21:36:22,846 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) [2024-06-21 21:36:22,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:36:22,846 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:36:22,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 21:36:22,847 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)] === [2024-06-21 21:36:22,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:36:22,847 INFO L85 PathProgramCache]: Analyzing trace with hash -882748897, now seen corresponding path program 2 times [2024-06-21 21:36:22,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:36:22,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378765778] [2024-06-21 21:36:22,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:36:22,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:36:22,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:36:26,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:36:26,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:36:26,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378765778] [2024-06-21 21:36:26,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378765778] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:36:26,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:36:26,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:36:26,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795744079] [2024-06-21 21:36:26,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:36:26,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:36:26,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:36:26,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:36:26,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:36:26,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:36:26,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 518 transitions, 10474 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) [2024-06-21 21:36:26,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:36:26,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:36:26,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:36:29,282 INFO L124 PetriNetUnfolderBase]: 6567/10307 cut-off events. [2024-06-21 21:36:29,282 INFO L125 PetriNetUnfolderBase]: For 842423/842425 co-relation queries the response was YES. [2024-06-21 21:36:29,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88469 conditions, 10307 events. 6567/10307 cut-off events. For 842423/842425 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 65669 event pairs, 2320 based on Foata normal form. 2/10306 useless extension candidates. Maximal degree in co-relation 88334. Up to 9854 conditions per place. [2024-06-21 21:36:29,418 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 497 selfloop transitions, 46 changer transitions 0/547 dead transitions. [2024-06-21 21:36:29,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 547 transitions, 11692 flow [2024-06-21 21:36:29,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:36:29,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:36:29,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-21 21:36:29,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-21 21:36:29,419 INFO L175 Difference]: Start difference. First operand has 293 places, 518 transitions, 10474 flow. Second operand 8 states and 133 transitions. [2024-06-21 21:36:29,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 547 transitions, 11692 flow [2024-06-21 21:36:31,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 547 transitions, 11578 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-21 21:36:31,542 INFO L231 Difference]: Finished difference. Result has 297 places, 520 transitions, 10519 flow [2024-06-21 21:36:31,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10364, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=472, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10519, PETRI_PLACES=297, PETRI_TRANSITIONS=520} [2024-06-21 21:36:31,543 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 254 predicate places. [2024-06-21 21:36:31,543 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 520 transitions, 10519 flow [2024-06-21 21:36:31,543 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) [2024-06-21 21:36:31,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:36:31,543 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:36:31,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 21:36:31,543 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)] === [2024-06-21 21:36:31,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:36:31,544 INFO L85 PathProgramCache]: Analyzing trace with hash -767342407, now seen corresponding path program 3 times [2024-06-21 21:36:31,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:36:31,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236655311] [2024-06-21 21:36:31,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:36:31,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:36:31,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:36:35,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:36:35,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:36:35,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236655311] [2024-06-21 21:36:35,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236655311] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:36:35,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:36:35,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:36:35,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767270018] [2024-06-21 21:36:35,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:36:35,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:36:35,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:36:35,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:36:35,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:36:35,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:36:35,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 520 transitions, 10519 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) [2024-06-21 21:36:35,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:36:35,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:36:35,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:36:38,996 INFO L124 PetriNetUnfolderBase]: 6619/10387 cut-off events. [2024-06-21 21:36:38,996 INFO L125 PetriNetUnfolderBase]: For 890368/890370 co-relation queries the response was YES. [2024-06-21 21:36:39,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89511 conditions, 10387 events. 6619/10387 cut-off events. For 890368/890370 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 66380 event pairs, 2466 based on Foata normal form. 14/10398 useless extension candidates. Maximal degree in co-relation 89374. Up to 9990 conditions per place. [2024-06-21 21:36:39,156 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 518 selfloop transitions, 27 changer transitions 0/549 dead transitions. [2024-06-21 21:36:39,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 549 transitions, 11763 flow [2024-06-21 21:36:39,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:36:39,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:36:39,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-21 21:36:39,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37037037037037035 [2024-06-21 21:36:39,157 INFO L175 Difference]: Start difference. First operand has 297 places, 520 transitions, 10519 flow. Second operand 9 states and 140 transitions. [2024-06-21 21:36:39,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 549 transitions, 11763 flow [2024-06-21 21:36:41,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 549 transitions, 11628 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-21 21:36:41,404 INFO L231 Difference]: Finished difference. Result has 300 places, 522 transitions, 10506 flow [2024-06-21 21:36:41,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10384, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=520, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=493, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10506, PETRI_PLACES=300, PETRI_TRANSITIONS=522} [2024-06-21 21:36:41,405 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 257 predicate places. [2024-06-21 21:36:41,405 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 522 transitions, 10506 flow [2024-06-21 21:36:41,405 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) [2024-06-21 21:36:41,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:36:41,405 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:36:41,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 21:36:41,405 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)] === [2024-06-21 21:36:41,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:36:41,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1924737449, now seen corresponding path program 1 times [2024-06-21 21:36:41,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:36:41,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731234959] [2024-06-21 21:36:41,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:36:41,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:36:41,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:36:44,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:36:44,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:36:44,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731234959] [2024-06-21 21:36:44,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731234959] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:36:44,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:36:44,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:36:44,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953720119] [2024-06-21 21:36:44,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:36:44,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:36:44,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:36:44,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:36:44,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:36:45,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:36:45,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 522 transitions, 10506 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) [2024-06-21 21:36:45,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:36:45,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:36:45,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:36:48,289 INFO L124 PetriNetUnfolderBase]: 6671/10467 cut-off events. [2024-06-21 21:36:48,289 INFO L125 PetriNetUnfolderBase]: For 916264/916266 co-relation queries the response was YES. [2024-06-21 21:36:48,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90276 conditions, 10467 events. 6671/10467 cut-off events. For 916264/916266 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 66985 event pairs, 2474 based on Foata normal form. 14/10478 useless extension candidates. Maximal degree in co-relation 90138. Up to 10070 conditions per place. [2024-06-21 21:36:48,434 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 519 selfloop transitions, 28 changer transitions 0/551 dead transitions. [2024-06-21 21:36:48,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 551 transitions, 11732 flow [2024-06-21 21:36:48,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:36:48,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:36:48,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 148 transitions. [2024-06-21 21:36:48,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3523809523809524 [2024-06-21 21:36:48,435 INFO L175 Difference]: Start difference. First operand has 300 places, 522 transitions, 10506 flow. Second operand 10 states and 148 transitions. [2024-06-21 21:36:48,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 551 transitions, 11732 flow [2024-06-21 21:36:50,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 551 transitions, 11648 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-21 21:36:50,397 INFO L231 Difference]: Finished difference. Result has 304 places, 524 transitions, 10524 flow [2024-06-21 21:36:50,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10422, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=494, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10524, PETRI_PLACES=304, PETRI_TRANSITIONS=524} [2024-06-21 21:36:50,397 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 261 predicate places. [2024-06-21 21:36:50,397 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 524 transitions, 10524 flow [2024-06-21 21:36:50,398 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) [2024-06-21 21:36:50,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:36:50,398 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:36:50,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 21:36:50,398 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)] === [2024-06-21 21:36:50,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:36:50,398 INFO L85 PathProgramCache]: Analyzing trace with hash 953135255, now seen corresponding path program 4 times [2024-06-21 21:36:50,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:36:50,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2486659] [2024-06-21 21:36:50,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:36:50,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:36:50,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:36:53,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:36:53,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:36:53,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2486659] [2024-06-21 21:36:53,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2486659] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:36:53,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:36:53,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:36:53,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982577876] [2024-06-21 21:36:53,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:36:53,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:36:53,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:36:53,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:36:53,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:36:53,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:36:53,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 524 transitions, 10524 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) [2024-06-21 21:36:53,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:36:53,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:36:53,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:36:57,149 INFO L124 PetriNetUnfolderBase]: 6638/10410 cut-off events. [2024-06-21 21:36:57,150 INFO L125 PetriNetUnfolderBase]: For 914576/914578 co-relation queries the response was YES. [2024-06-21 21:36:57,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89506 conditions, 10410 events. 6638/10410 cut-off events. For 914576/914578 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 66342 event pairs, 2269 based on Foata normal form. 14/10421 useless extension candidates. Maximal degree in co-relation 89367. Up to 9859 conditions per place. [2024-06-21 21:36:57,297 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 509 selfloop transitions, 47 changer transitions 0/560 dead transitions. [2024-06-21 21:36:57,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 560 transitions, 11762 flow [2024-06-21 21:36:57,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:36:57,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:36:57,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-21 21:36:57,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-06-21 21:36:57,298 INFO L175 Difference]: Start difference. First operand has 304 places, 524 transitions, 10524 flow. Second operand 9 states and 151 transitions. [2024-06-21 21:36:57,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 560 transitions, 11762 flow [2024-06-21 21:36:59,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 560 transitions, 11639 flow, removed 29 selfloop flow, removed 9 redundant places. [2024-06-21 21:36:59,175 INFO L231 Difference]: Finished difference. Result has 304 places, 524 transitions, 10508 flow [2024-06-21 21:36:59,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10401, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=477, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10508, PETRI_PLACES=304, PETRI_TRANSITIONS=524} [2024-06-21 21:36:59,176 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 261 predicate places. [2024-06-21 21:36:59,176 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 524 transitions, 10508 flow [2024-06-21 21:36:59,176 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) [2024-06-21 21:36:59,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:36:59,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:36:59,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 21:36:59,176 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)] === [2024-06-21 21:36:59,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:36:59,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1189495313, now seen corresponding path program 2 times [2024-06-21 21:36:59,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:36:59,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242763300] [2024-06-21 21:36:59,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:36:59,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:36:59,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:37:03,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:37:03,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:37:03,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242763300] [2024-06-21 21:37:03,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242763300] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:37:03,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:37:03,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:37:03,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233602902] [2024-06-21 21:37:03,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:37:03,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:37:03,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:37:03,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:37:03,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:37:03,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:37:03,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 524 transitions, 10508 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) [2024-06-21 21:37:03,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:37:03,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:37:03,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:37:06,699 INFO L124 PetriNetUnfolderBase]: 6646/10432 cut-off events. [2024-06-21 21:37:06,699 INFO L125 PetriNetUnfolderBase]: For 915637/915639 co-relation queries the response was YES. [2024-06-21 21:37:06,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89981 conditions, 10432 events. 6646/10432 cut-off events. For 915637/915639 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 66601 event pairs, 2305 based on Foata normal form. 2/10431 useless extension candidates. Maximal degree in co-relation 89842. Up to 9995 conditions per place. [2024-06-21 21:37:06,817 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 505 selfloop transitions, 49 changer transitions 0/558 dead transitions. [2024-06-21 21:37:06,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 558 transitions, 11816 flow [2024-06-21 21:37:06,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:37:06,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:37:06,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-21 21:37:06,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.373015873015873 [2024-06-21 21:37:06,819 INFO L175 Difference]: Start difference. First operand has 304 places, 524 transitions, 10508 flow. Second operand 9 states and 141 transitions. [2024-06-21 21:37:06,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 558 transitions, 11816 flow [2024-06-21 21:37:08,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 558 transitions, 11705 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-21 21:37:08,828 INFO L231 Difference]: Finished difference. Result has 305 places, 531 transitions, 10636 flow [2024-06-21 21:37:08,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10405, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=479, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10636, PETRI_PLACES=305, PETRI_TRANSITIONS=531} [2024-06-21 21:37:08,828 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 262 predicate places. [2024-06-21 21:37:08,828 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 531 transitions, 10636 flow [2024-06-21 21:37:08,829 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) [2024-06-21 21:37:08,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:37:08,829 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:37:08,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 21:37:08,829 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)] === [2024-06-21 21:37:08,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:37:08,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1189791983, now seen corresponding path program 3 times [2024-06-21 21:37:08,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:37:08,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377774929] [2024-06-21 21:37:08,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:37:08,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:37:08,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:37:12,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:37:12,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:37:12,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377774929] [2024-06-21 21:37:12,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377774929] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:37:12,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:37:12,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:37:12,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569984759] [2024-06-21 21:37:12,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:37:12,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:37:12,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:37:12,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:37:12,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:37:12,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:37:12,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 531 transitions, 10636 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) [2024-06-21 21:37:12,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:37:12,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:37:12,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:37:15,319 INFO L124 PetriNetUnfolderBase]: 6713/10532 cut-off events. [2024-06-21 21:37:15,319 INFO L125 PetriNetUnfolderBase]: For 938563/938568 co-relation queries the response was YES. [2024-06-21 21:37:15,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91231 conditions, 10532 events. 6713/10532 cut-off events. For 938563/938568 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 67278 event pairs, 2307 based on Foata normal form. 4/10532 useless extension candidates. Maximal degree in co-relation 91091. Up to 9950 conditions per place. [2024-06-21 21:37:15,473 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 506 selfloop transitions, 52 changer transitions 0/562 dead transitions. [2024-06-21 21:37:15,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 562 transitions, 12040 flow [2024-06-21 21:37:15,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:37:15,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:37:15,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-21 21:37:15,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-21 21:37:15,474 INFO L175 Difference]: Start difference. First operand has 305 places, 531 transitions, 10636 flow. Second operand 8 states and 133 transitions. [2024-06-21 21:37:15,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 562 transitions, 12040 flow [2024-06-21 21:37:17,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 562 transitions, 11933 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-21 21:37:17,545 INFO L231 Difference]: Finished difference. Result has 308 places, 534 transitions, 10706 flow [2024-06-21 21:37:17,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10529, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=480, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10706, PETRI_PLACES=308, PETRI_TRANSITIONS=534} [2024-06-21 21:37:17,545 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 265 predicate places. [2024-06-21 21:37:17,546 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 534 transitions, 10706 flow [2024-06-21 21:37:17,546 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) [2024-06-21 21:37:17,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:37:17,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:37:17,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 21:37:17,546 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)] === [2024-06-21 21:37:17,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:37:17,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1795059952, now seen corresponding path program 1 times [2024-06-21 21:37:17,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:37:17,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874092114] [2024-06-21 21:37:17,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:37:17,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:37:17,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:37:20,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:37:20,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:37:20,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874092114] [2024-06-21 21:37:20,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874092114] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:37:20,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:37:20,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:37:20,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290210088] [2024-06-21 21:37:20,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:37:20,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:37:20,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:37:20,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:37:20,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:37:20,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:37:20,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 534 transitions, 10706 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) [2024-06-21 21:37:20,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:37:20,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:37:20,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:37:24,586 INFO L124 PetriNetUnfolderBase]: 7103/11185 cut-off events. [2024-06-21 21:37:24,586 INFO L125 PetriNetUnfolderBase]: For 1140543/1140561 co-relation queries the response was YES. [2024-06-21 21:37:24,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97255 conditions, 11185 events. 7103/11185 cut-off events. For 1140543/1140561 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 72317 event pairs, 2016 based on Foata normal form. 64/11245 useless extension candidates. Maximal degree in co-relation 97114. Up to 9781 conditions per place. [2024-06-21 21:37:24,750 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 461 selfloop transitions, 124 changer transitions 0/589 dead transitions. [2024-06-21 21:37:24,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 589 transitions, 12304 flow [2024-06-21 21:37:24,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:37:24,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:37:24,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 176 transitions. [2024-06-21 21:37:24,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41904761904761906 [2024-06-21 21:37:24,751 INFO L175 Difference]: Start difference. First operand has 308 places, 534 transitions, 10706 flow. Second operand 10 states and 176 transitions. [2024-06-21 21:37:24,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 589 transitions, 12304 flow [2024-06-21 21:37:28,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 589 transitions, 12208 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-21 21:37:28,384 INFO L231 Difference]: Finished difference. Result has 315 places, 538 transitions, 10974 flow [2024-06-21 21:37:28,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10610, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=534, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10974, PETRI_PLACES=315, PETRI_TRANSITIONS=538} [2024-06-21 21:37:28,384 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 272 predicate places. [2024-06-21 21:37:28,384 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 538 transitions, 10974 flow [2024-06-21 21:37:28,384 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) [2024-06-21 21:37:28,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:37:28,385 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:37:28,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 21:37:28,385 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)] === [2024-06-21 21:37:28,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:37:28,385 INFO L85 PathProgramCache]: Analyzing trace with hash 2059894370, now seen corresponding path program 2 times [2024-06-21 21:37:28,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:37:28,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917012536] [2024-06-21 21:37:28,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:37:28,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:37:28,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:37:32,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:37:32,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:37:32,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917012536] [2024-06-21 21:37:32,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917012536] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:37:32,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:37:32,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:37:32,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968215585] [2024-06-21 21:37:32,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:37:32,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:37:32,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:37:32,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:37:32,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:37:32,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:37:32,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 538 transitions, 10974 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) [2024-06-21 21:37:32,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:37:32,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:37:32,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:37:35,720 INFO L124 PetriNetUnfolderBase]: 7315/11525 cut-off events. [2024-06-21 21:37:35,721 INFO L125 PetriNetUnfolderBase]: For 1220759/1220777 co-relation queries the response was YES. [2024-06-21 21:37:35,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99744 conditions, 11525 events. 7315/11525 cut-off events. For 1220759/1220777 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 75226 event pairs, 2666 based on Foata normal form. 80/11601 useless extension candidates. Maximal degree in co-relation 99600. Up to 10459 conditions per place. [2024-06-21 21:37:35,889 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 443 selfloop transitions, 126 changer transitions 8/581 dead transitions. [2024-06-21 21:37:35,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 581 transitions, 12313 flow [2024-06-21 21:37:35,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:37:35,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:37:35,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 169 transitions. [2024-06-21 21:37:35,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4023809523809524 [2024-06-21 21:37:35,890 INFO L175 Difference]: Start difference. First operand has 315 places, 538 transitions, 10974 flow. Second operand 10 states and 169 transitions. [2024-06-21 21:37:35,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 581 transitions, 12313 flow [2024-06-21 21:37:39,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 581 transitions, 12006 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-21 21:37:39,218 INFO L231 Difference]: Finished difference. Result has 319 places, 536 transitions, 10874 flow [2024-06-21 21:37:39,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10667, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10874, PETRI_PLACES=319, PETRI_TRANSITIONS=536} [2024-06-21 21:37:39,218 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 276 predicate places. [2024-06-21 21:37:39,218 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 536 transitions, 10874 flow [2024-06-21 21:37:39,218 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) [2024-06-21 21:37:39,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:37:39,218 INFO 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] [2024-06-21 21:37:39,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 21:37:39,219 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)] === [2024-06-21 21:37:39,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:37:39,219 INFO L85 PathProgramCache]: Analyzing trace with hash 2124638558, now seen corresponding path program 3 times [2024-06-21 21:37:39,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:37:39,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112942871] [2024-06-21 21:37:39,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:37:39,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:37:39,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:37:43,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:37:43,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:37:43,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112942871] [2024-06-21 21:37:43,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112942871] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:37:43,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:37:43,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:37:43,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78402105] [2024-06-21 21:37:43,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:37:43,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:37:43,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:37:43,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:37:43,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:37:43,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:37:43,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 536 transitions, 10874 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) [2024-06-21 21:37:43,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:37:43,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:37:43,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:37:47,016 INFO L124 PetriNetUnfolderBase]: 7463/11789 cut-off events. [2024-06-21 21:37:47,017 INFO L125 PetriNetUnfolderBase]: For 1234161/1234179 co-relation queries the response was YES. [2024-06-21 21:37:47,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100379 conditions, 11789 events. 7463/11789 cut-off events. For 1234161/1234179 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 77511 event pairs, 2676 based on Foata normal form. 72/11857 useless extension candidates. Maximal degree in co-relation 100234. Up to 10435 conditions per place. [2024-06-21 21:37:47,153 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 446 selfloop transitions, 122 changer transitions 19/591 dead transitions. [2024-06-21 21:37:47,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 591 transitions, 12329 flow [2024-06-21 21:37:47,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:37:47,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:37:47,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 176 transitions. [2024-06-21 21:37:47,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41904761904761906 [2024-06-21 21:37:47,154 INFO L175 Difference]: Start difference. First operand has 319 places, 536 transitions, 10874 flow. Second operand 10 states and 176 transitions. [2024-06-21 21:37:47,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 591 transitions, 12329 flow [2024-06-21 21:37:50,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 591 transitions, 12074 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-21 21:37:50,162 INFO L231 Difference]: Finished difference. Result has 322 places, 532 transitions, 10702 flow [2024-06-21 21:37:50,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10619, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10702, PETRI_PLACES=322, PETRI_TRANSITIONS=532} [2024-06-21 21:37:50,162 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 279 predicate places. [2024-06-21 21:37:50,162 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 532 transitions, 10702 flow [2024-06-21 21:37:50,162 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) [2024-06-21 21:37:50,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:37:50,162 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:37:50,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 21:37:50,163 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)] === [2024-06-21 21:37:50,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:37:50,163 INFO L85 PathProgramCache]: Analyzing trace with hash -1855704910, now seen corresponding path program 4 times [2024-06-21 21:37:50,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:37:50,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354070173] [2024-06-21 21:37:50,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:37:50,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:37:50,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:37:54,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:37:54,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:37:54,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354070173] [2024-06-21 21:37:54,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354070173] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:37:54,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:37:54,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:37:54,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099633963] [2024-06-21 21:37:54,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:37:54,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:37:54,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:37:54,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:37:54,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:37:54,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:37:54,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 532 transitions, 10702 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) [2024-06-21 21:37:54,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:37:54,157 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:37:54,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:37:57,836 INFO L124 PetriNetUnfolderBase]: 7369/11640 cut-off events. [2024-06-21 21:37:57,837 INFO L125 PetriNetUnfolderBase]: For 1284546/1284551 co-relation queries the response was YES. [2024-06-21 21:37:57,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100404 conditions, 11640 events. 7369/11640 cut-off events. For 1284546/1284551 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 76446 event pairs, 2614 based on Foata normal form. 66/11702 useless extension candidates. Maximal degree in co-relation 100257. Up to 9895 conditions per place. [2024-06-21 21:37:57,998 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 383 selfloop transitions, 166 changer transitions 15/568 dead transitions. [2024-06-21 21:37:57,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 568 transitions, 11990 flow [2024-06-21 21:37:57,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:37:57,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:37:57,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 165 transitions. [2024-06-21 21:37:57,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-21 21:37:57,999 INFO L175 Difference]: Start difference. First operand has 322 places, 532 transitions, 10702 flow. Second operand 10 states and 165 transitions. [2024-06-21 21:37:58,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 568 transitions, 11990 flow [2024-06-21 21:38:00,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 568 transitions, 11740 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-21 21:38:00,698 INFO L231 Difference]: Finished difference. Result has 323 places, 523 transitions, 10533 flow [2024-06-21 21:38:00,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10452, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=532, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10533, PETRI_PLACES=323, PETRI_TRANSITIONS=523} [2024-06-21 21:38:00,698 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 280 predicate places. [2024-06-21 21:38:00,698 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 523 transitions, 10533 flow [2024-06-21 21:38:00,698 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) [2024-06-21 21:38:00,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:38:00,698 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:38:00,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 21:38:00,699 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)] === [2024-06-21 21:38:00,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:38:00,699 INFO L85 PathProgramCache]: Analyzing trace with hash -765377010, now seen corresponding path program 5 times [2024-06-21 21:38:00,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:38:00,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918476381] [2024-06-21 21:38:00,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:38:00,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:38:00,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:38:04,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:38:04,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:38:04,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918476381] [2024-06-21 21:38:04,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918476381] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:38:04,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:38:04,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:38:04,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193873112] [2024-06-21 21:38:04,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:38:04,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:38:04,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:38:04,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:38:04,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:38:04,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:38:04,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 523 transitions, 10533 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) [2024-06-21 21:38:04,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:38:04,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:38:04,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:38:08,831 INFO L124 PetriNetUnfolderBase]: 7249/11492 cut-off events. [2024-06-21 21:38:08,831 INFO L125 PetriNetUnfolderBase]: For 1312871/1312876 co-relation queries the response was YES. [2024-06-21 21:38:08,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99176 conditions, 11492 events. 7249/11492 cut-off events. For 1312871/1312876 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 75775 event pairs, 2668 based on Foata normal form. 66/11554 useless extension candidates. Maximal degree in co-relation 99029. Up to 9907 conditions per place. [2024-06-21 21:38:08,980 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 373 selfloop transitions, 175 changer transitions 9/561 dead transitions. [2024-06-21 21:38:08,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 561 transitions, 11815 flow [2024-06-21 21:38:08,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:38:08,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:38:08,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 180 transitions. [2024-06-21 21:38:08,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38961038961038963 [2024-06-21 21:38:08,982 INFO L175 Difference]: Start difference. First operand has 323 places, 523 transitions, 10533 flow. Second operand 11 states and 180 transitions. [2024-06-21 21:38:08,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 561 transitions, 11815 flow [2024-06-21 21:38:11,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 561 transitions, 11496 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-21 21:38:11,711 INFO L231 Difference]: Finished difference. Result has 326 places, 520 transitions, 10511 flow [2024-06-21 21:38:11,712 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10214, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=523, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10511, PETRI_PLACES=326, PETRI_TRANSITIONS=520} [2024-06-21 21:38:11,712 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 283 predicate places. [2024-06-21 21:38:11,712 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 520 transitions, 10511 flow [2024-06-21 21:38:11,712 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) [2024-06-21 21:38:11,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:38:11,713 INFO 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] [2024-06-21 21:38:11,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 21:38:11,713 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)] === [2024-06-21 21:38:11,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:38:11,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1930637426, now seen corresponding path program 6 times [2024-06-21 21:38:11,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:38:11,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146719754] [2024-06-21 21:38:11,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:38:11,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:38:11,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:38:15,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:38:15,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:38:15,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146719754] [2024-06-21 21:38:15,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146719754] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:38:15,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:38:15,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:38:15,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686480324] [2024-06-21 21:38:15,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:38:15,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:38:15,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:38:15,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:38:15,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:38:15,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:38:15,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 520 transitions, 10511 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) [2024-06-21 21:38:15,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:38:15,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:38:15,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:38:19,592 INFO L124 PetriNetUnfolderBase]: 7425/11804 cut-off events. [2024-06-21 21:38:19,592 INFO L125 PetriNetUnfolderBase]: For 1328599/1328604 co-relation queries the response was YES. [2024-06-21 21:38:19,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100282 conditions, 11804 events. 7425/11804 cut-off events. For 1328599/1328604 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 78445 event pairs, 2726 based on Foata normal form. 58/11858 useless extension candidates. Maximal degree in co-relation 100135. Up to 9823 conditions per place. [2024-06-21 21:38:19,743 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 374 selfloop transitions, 155 changer transitions 37/570 dead transitions. [2024-06-21 21:38:19,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 570 transitions, 11917 flow [2024-06-21 21:38:19,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:38:19,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:38:19,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 184 transitions. [2024-06-21 21:38:19,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39826839826839827 [2024-06-21 21:38:19,744 INFO L175 Difference]: Start difference. First operand has 326 places, 520 transitions, 10511 flow. Second operand 11 states and 184 transitions. [2024-06-21 21:38:19,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 570 transitions, 11917 flow [2024-06-21 21:38:22,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 570 transitions, 11568 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-21 21:38:22,836 INFO L231 Difference]: Finished difference. Result has 329 places, 499 transitions, 9944 flow [2024-06-21 21:38:22,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10162, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=520, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9944, PETRI_PLACES=329, PETRI_TRANSITIONS=499} [2024-06-21 21:38:22,837 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 286 predicate places. [2024-06-21 21:38:22,837 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 499 transitions, 9944 flow [2024-06-21 21:38:22,837 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) [2024-06-21 21:38:22,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:38:22,837 INFO 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] [2024-06-21 21:38:22,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 21:38:22,837 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)] === [2024-06-21 21:38:22,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:38:22,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1168019166, now seen corresponding path program 1 times [2024-06-21 21:38:22,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:38:22,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250528398] [2024-06-21 21:38:22,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:38:22,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:38:22,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:38:25,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:38:25,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:38:25,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250528398] [2024-06-21 21:38:25,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250528398] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:38:25,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:38:25,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:38:25,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465406624] [2024-06-21 21:38:25,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:38:25,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:38:25,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:38:25,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:38:25,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:38:25,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:38:25,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 499 transitions, 9944 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:25,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:38:25,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:38:25,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:38:29,586 INFO L124 PetriNetUnfolderBase]: 6978/11069 cut-off events. [2024-06-21 21:38:29,586 INFO L125 PetriNetUnfolderBase]: For 1238037/1238042 co-relation queries the response was YES. [2024-06-21 21:38:29,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97408 conditions, 11069 events. 6978/11069 cut-off events. For 1238037/1238042 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 72513 event pairs, 2497 based on Foata normal form. 4/11069 useless extension candidates. Maximal degree in co-relation 97259. Up to 9231 conditions per place. [2024-06-21 21:38:29,752 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 322 selfloop transitions, 219 changer transitions 0/545 dead transitions. [2024-06-21 21:38:29,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 545 transitions, 11780 flow [2024-06-21 21:38:29,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:38:29,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:38:29,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-21 21:38:29,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-21 21:38:29,753 INFO L175 Difference]: Start difference. First operand has 329 places, 499 transitions, 9944 flow. Second operand 9 states and 157 transitions. [2024-06-21 21:38:29,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 545 transitions, 11780 flow [2024-06-21 21:38:33,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 545 transitions, 11317 flow, removed 19 selfloop flow, removed 12 redundant places. [2024-06-21 21:38:33,068 INFO L231 Difference]: Finished difference. Result has 326 places, 508 transitions, 10156 flow [2024-06-21 21:38:33,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9481, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=211, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10156, PETRI_PLACES=326, PETRI_TRANSITIONS=508} [2024-06-21 21:38:33,069 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 283 predicate places. [2024-06-21 21:38:33,069 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 508 transitions, 10156 flow [2024-06-21 21:38:33,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:33,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:38:33,069 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:38:33,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 21:38:33,069 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)] === [2024-06-21 21:38:33,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:38:33,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1168318068, now seen corresponding path program 1 times [2024-06-21 21:38:33,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:38:33,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926806637] [2024-06-21 21:38:33,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:38:33,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:38:33,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:38:36,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:38:36,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:38:36,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926806637] [2024-06-21 21:38:36,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926806637] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:38:36,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:38:36,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:38:36,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321268387] [2024-06-21 21:38:36,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:38:36,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:38:36,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:38:36,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:38:36,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:38:36,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:38:36,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 508 transitions, 10156 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) [2024-06-21 21:38:36,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:38:36,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:38:36,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:38:41,118 INFO L124 PetriNetUnfolderBase]: 6954/11036 cut-off events. [2024-06-21 21:38:41,118 INFO L125 PetriNetUnfolderBase]: For 1255879/1255884 co-relation queries the response was YES. [2024-06-21 21:38:41,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97199 conditions, 11036 events. 6954/11036 cut-off events. For 1255879/1255884 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 72322 event pairs, 2507 based on Foata normal form. 10/11042 useless extension candidates. Maximal degree in co-relation 97050. Up to 9219 conditions per place. [2024-06-21 21:38:41,249 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 307 selfloop transitions, 242 changer transitions 0/553 dead transitions. [2024-06-21 21:38:41,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 553 transitions, 11528 flow [2024-06-21 21:38:41,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:38:41,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:38:41,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 190 transitions. [2024-06-21 21:38:41,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41125541125541126 [2024-06-21 21:38:41,251 INFO L175 Difference]: Start difference. First operand has 326 places, 508 transitions, 10156 flow. Second operand 11 states and 190 transitions. [2024-06-21 21:38:41,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 553 transitions, 11528 flow [2024-06-21 21:38:44,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 553 transitions, 11323 flow, removed 58 selfloop flow, removed 3 redundant places. [2024-06-21 21:38:44,056 INFO L231 Difference]: Finished difference. Result has 334 places, 508 transitions, 10442 flow [2024-06-21 21:38:44,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9951, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=242, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10442, PETRI_PLACES=334, PETRI_TRANSITIONS=508} [2024-06-21 21:38:44,057 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 291 predicate places. [2024-06-21 21:38:44,057 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 508 transitions, 10442 flow [2024-06-21 21:38:44,057 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) [2024-06-21 21:38:44,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:38:44,058 INFO 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] [2024-06-21 21:38:44,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 21:38:44,058 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)] === [2024-06-21 21:38:44,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:38:44,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1168317696, now seen corresponding path program 2 times [2024-06-21 21:38:44,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:38:44,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597032186] [2024-06-21 21:38:44,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:38:44,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:38:44,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat