./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/rfi006_power.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/rfi006_power.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/rfi006_power.opt.i ./goblint.2024-06-19_11-23-25.files/protection/rfi006_power.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 20:42:59,769 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 20:42:59,833 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 20:42:59,838 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 20:42:59,839 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 20:42:59,862 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 20:42:59,863 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 20:42:59,863 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 20:42:59,864 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 20:42:59,867 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 20:42:59,867 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 20:42:59,868 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 20:42:59,868 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 20:42:59,869 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 20:42:59,870 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 20:42:59,870 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 20:42:59,870 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 20:42:59,870 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 20:42:59,871 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 20:42:59,871 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 20:42:59,871 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 20:42:59,871 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 20:42:59,872 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 20:42:59,872 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 20:42:59,872 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 20:42:59,872 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 20:42:59,873 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 20:42:59,873 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 20:42:59,873 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 20:42:59,874 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 20:42:59,874 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 20:42:59,875 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 20:42:59,875 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 20:42:59,875 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 20:42:59,875 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 20:42:59,875 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 20:42:59,876 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 20:42:59,876 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 20:42:59,876 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 20:42:59,876 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 20:42:59,877 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 20:42:59,877 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 20:42:59,877 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 20:42:59,877 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 20:43:00,055 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 20:43:00,084 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 20:43:00,086 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 20:43:00,086 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 20:43:00,088 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 20:43:00,089 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/rfi006_power.opt.yml/witness.yml [2024-06-27 20:43:00,330 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 20:43:00,330 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 20:43:00,331 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/rfi006_power.opt.i [2024-06-27 20:43:01,387 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 20:43:01,579 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 20:43:01,580 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/rfi006_power.opt.i [2024-06-27 20:43:01,591 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f4fb53f9/c4d0126e831f4e9e9b8b65bba6a3e0e9/FLAG5fb43020a [2024-06-27 20:43:01,605 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f4fb53f9/c4d0126e831f4e9e9b8b65bba6a3e0e9 [2024-06-27 20:43:01,605 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 20:43:01,606 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 20:43:01,607 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 20:43:01,607 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 20:43:01,611 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 20:43:01,612 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:43:00" (1/2) ... [2024-06-27 20:43:01,613 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@716fe9c8 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:43:01, skipping insertion in model container [2024-06-27 20:43:01,613 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:43:00" (1/2) ... [2024-06-27 20:43:01,614 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@34e25aa4 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:43:01, skipping insertion in model container [2024-06-27 20:43:01,614 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 08:43:01" (2/2) ... [2024-06-27 20:43:01,614 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@716fe9c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:43:01, skipping insertion in model container [2024-06-27 20:43:01,615 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 08:43:01" (2/2) ... [2024-06-27 20:43:01,615 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 20:43:01,755 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 20:43:01,757 INFO L97 edCorrectnessWitness]: Location invariant before [L863-L863] ((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2))) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & x && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1)) [2024-06-27 20:43:01,772 INFO L97 edCorrectnessWitness]: Location invariant before [L862-L862] ((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2))) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & x && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1)) [2024-06-27 20:43:01,772 INFO L97 edCorrectnessWitness]: Location invariant before [L860-L860] ((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2))) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & x && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1)) [2024-06-27 20:43:01,772 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 20:43:01,773 INFO L106 edCorrectnessWitness]: ghost_update [L858-L858] multithreaded = 1; [2024-06-27 20:43:01,811 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 20:43:02,163 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 20:43:02,185 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 20:43:02,299 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 20:43:02,333 INFO L206 MainTranslator]: Completed translation [2024-06-27 20:43:02,333 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:43:02 WrapperNode [2024-06-27 20:43:02,333 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 20:43:02,334 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 20:43:02,334 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 20:43:02,334 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 20:43:02,339 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:43:02" (1/1) ... [2024-06-27 20:43:02,361 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:43:02" (1/1) ... [2024-06-27 20:43:02,393 INFO L138 Inliner]: procedures = 175, calls = 76, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 215 [2024-06-27 20:43:02,394 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 20:43:02,394 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 20:43:02,394 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 20:43:02,394 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 20:43:02,403 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:43:02" (1/1) ... [2024-06-27 20:43:02,408 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:43:02" (1/1) ... [2024-06-27 20:43:02,412 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:43:02" (1/1) ... [2024-06-27 20:43:02,428 INFO L175 MemorySlicer]: Split 34 memory accesses to 2 slices as follows [2, 32]. 94 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 6 writes are split as follows [0, 6]. [2024-06-27 20:43:02,428 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:43:02" (1/1) ... [2024-06-27 20:43:02,428 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:43:02" (1/1) ... [2024-06-27 20:43:02,453 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:43:02" (1/1) ... [2024-06-27 20:43:02,455 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:43:02" (1/1) ... [2024-06-27 20:43:02,457 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:43:02" (1/1) ... [2024-06-27 20:43:02,458 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:43:02" (1/1) ... [2024-06-27 20:43:02,491 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 20:43:02,491 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 20:43:02,492 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 20:43:02,492 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 20:43:02,492 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:43:02" (1/1) ... [2024-06-27 20:43:02,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 20:43:02,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 20:43:02,541 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) [2024-06-27 20:43:02,557 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 [2024-06-27 20:43:02,584 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-27 20:43:02,585 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-27 20:43:02,585 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-27 20:43:02,585 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-27 20:43:02,585 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 20:43:02,585 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 20:43:02,585 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 20:43:02,586 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 20:43:02,586 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 20:43:02,586 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 20:43:02,587 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 20:43:02,587 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 20:43:02,587 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 20:43:02,587 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-27 20:43:02,588 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 20:43:02,588 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 20:43:02,589 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 20:43:02,591 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 20:43:02,711 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 20:43:02,712 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 20:43:03,205 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 20:43:03,206 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 20:43:03,512 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 20:43:03,512 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 20:43:03,512 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 08:43:03 BoogieIcfgContainer [2024-06-27 20:43:03,512 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 20:43:03,514 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 20:43:03,514 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 20:43:03,516 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 20:43:03,516 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:43:00" (1/4) ... [2024-06-27 20:43:03,517 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4db13793 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 08:43:03, skipping insertion in model container [2024-06-27 20:43:03,517 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 08:43:01" (2/4) ... [2024-06-27 20:43:03,517 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4db13793 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 08:43:03, skipping insertion in model container [2024-06-27 20:43:03,517 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:43:02" (3/4) ... [2024-06-27 20:43:03,517 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4db13793 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 08:43:03, skipping insertion in model container [2024-06-27 20:43:03,517 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 08:43:03" (4/4) ... [2024-06-27 20:43:03,518 INFO L112 eAbstractionObserver]: Analyzing ICFG rfi006_power.opt.i [2024-06-27 20:43:03,533 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 20:43:03,533 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-27 20:43:03,533 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 20:43:03,623 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 20:43:03,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-27 20:43:03,686 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-27 20:43:03,686 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 20:43:03,689 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 61 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. [2024-06-27 20:43:03,689 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-27 20:43:03,717 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-27 20:43:03,769 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 20:43:03,776 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;@44a2cdc5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 20:43:03,777 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-27 20:43:03,781 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 20:43:03,781 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 20:43:03,782 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 20:43:03,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:43:03,785 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 20:43:03,785 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)] === [2024-06-27 20:43:03,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:43:03,799 INFO L85 PathProgramCache]: Analyzing trace with hash 774685300, now seen corresponding path program 1 times [2024-06-27 20:43:03,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:43:03,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149577946] [2024-06-27 20:43:03,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:43:03,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:43:03,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:43:05,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:43:05,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:43:05,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149577946] [2024-06-27 20:43:05,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149577946] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:43:05,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:43:05,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 20:43:05,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21429144] [2024-06-27 20:43:05,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:43:05,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 20:43:05,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:43:05,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 20:43:05,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 20:43:05,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:43:05,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:05,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:43:05,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:43:05,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:43:05,598 INFO L124 PetriNetUnfolderBase]: 990/1587 cut-off events. [2024-06-27 20:43:05,598 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-06-27 20:43:05,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3167 conditions, 1587 events. 990/1587 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 7727 event pairs, 650 based on Foata normal form. 1/1552 useless extension candidates. Maximal degree in co-relation 3155. Up to 1503 conditions per place. [2024-06-27 20:43:05,611 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 34 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2024-06-27 20:43:05,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 45 transitions, 181 flow [2024-06-27 20:43:05,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 20:43:05,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 20:43:05,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 71 transitions. [2024-06-27 20:43:05,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634920634920635 [2024-06-27 20:43:05,622 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 71 transitions. [2024-06-27 20:43:05,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 45 transitions, 181 flow [2024-06-27 20:43:05,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 45 transitions, 176 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 20:43:05,627 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-27 20:43:05,628 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} [2024-06-27 20:43:05,632 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-27 20:43:05,632 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-27 20:43:05,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:05,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:43:05,633 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:43:05,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 20:43:05,633 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)] === [2024-06-27 20:43:05,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:43:05,635 INFO L85 PathProgramCache]: Analyzing trace with hash 1443290035, now seen corresponding path program 1 times [2024-06-27 20:43:05,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:43:05,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947887437] [2024-06-27 20:43:05,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:43:05,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:43:05,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:43:07,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:43:07,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:43:07,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947887437] [2024-06-27 20:43:07,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947887437] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:43:07,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:43:07,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 20:43:07,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418845770] [2024-06-27 20:43:07,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:43:07,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 20:43:07,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:43:07,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 20:43:07,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 20:43:07,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:43:07,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:07,567 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:43:07,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:43:07,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:43:08,099 INFO L124 PetriNetUnfolderBase]: 984/1578 cut-off events. [2024-06-27 20:43:08,100 INFO L125 PetriNetUnfolderBase]: For 292/292 co-relation queries the response was YES. [2024-06-27 20:43:08,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3587 conditions, 1578 events. 984/1578 cut-off events. For 292/292 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 7714 event pairs, 540 based on Foata normal form. 3/1574 useless extension candidates. Maximal degree in co-relation 3575. Up to 1475 conditions per place. [2024-06-27 20:43:08,106 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 43 selfloop transitions, 7 changer transitions 0/57 dead transitions. [2024-06-27 20:43:08,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 57 transitions, 256 flow [2024-06-27 20:43:08,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 20:43:08,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 20:43:08,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 93 transitions. [2024-06-27 20:43:08,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5535714285714286 [2024-06-27 20:43:08,108 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 93 transitions. [2024-06-27 20:43:08,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 57 transitions, 256 flow [2024-06-27 20:43:08,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 57 transitions, 252 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 20:43:08,110 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-27 20:43:08,110 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} [2024-06-27 20:43:08,111 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-27 20:43:08,111 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-27 20:43:08,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:08,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:43:08,111 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:43:08,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 20:43:08,112 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)] === [2024-06-27 20:43:08,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:43:08,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1792320028, now seen corresponding path program 1 times [2024-06-27 20:43:08,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:43:08,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485261694] [2024-06-27 20:43:08,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:43:08,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:43:08,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:43:09,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:43:09,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:43:09,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485261694] [2024-06-27 20:43:09,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485261694] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:43:09,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:43:09,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 20:43:09,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120056806] [2024-06-27 20:43:09,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:43:09,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 20:43:09,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:43:09,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 20:43:09,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 20:43:09,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:43:09,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 138 flow. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:09,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:43:09,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:43:09,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:43:10,629 INFO L124 PetriNetUnfolderBase]: 1209/1891 cut-off events. [2024-06-27 20:43:10,629 INFO L125 PetriNetUnfolderBase]: For 982/982 co-relation queries the response was YES. [2024-06-27 20:43:10,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4798 conditions, 1891 events. 1209/1891 cut-off events. For 982/982 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 9134 event pairs, 475 based on Foata normal form. 5/1892 useless extension candidates. Maximal degree in co-relation 4784. Up to 1726 conditions per place. [2024-06-27 20:43:10,637 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 59 selfloop transitions, 16 changer transitions 0/81 dead transitions. [2024-06-27 20:43:10,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 81 transitions, 420 flow [2024-06-27 20:43:10,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:43:10,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:43:10,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 119 transitions. [2024-06-27 20:43:10,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2024-06-27 20:43:10,639 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 5 states and 119 transitions. [2024-06-27 20:43:10,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 81 transitions, 420 flow [2024-06-27 20:43:10,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 81 transitions, 406 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-27 20:43:10,641 INFO L231 Difference]: Finished difference. Result has 51 places, 50 transitions, 237 flow [2024-06-27 20:43:10,641 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} [2024-06-27 20:43:10,642 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 8 predicate places. [2024-06-27 20:43:10,642 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 50 transitions, 237 flow [2024-06-27 20:43:10,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:10,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:43:10,643 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:43:10,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 20:43:10,643 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)] === [2024-06-27 20:43:10,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:43:10,643 INFO L85 PathProgramCache]: Analyzing trace with hash 992435139, now seen corresponding path program 1 times [2024-06-27 20:43:10,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:43:10,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465465313] [2024-06-27 20:43:10,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:43:10,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:43:10,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:43:12,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:43:12,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:43:12,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465465313] [2024-06-27 20:43:12,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465465313] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:43:12,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:43:12,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:43:12,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430465079] [2024-06-27 20:43:12,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:43:12,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:43:12,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:43:12,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:43:12,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:43:12,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:43:12,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 50 transitions, 237 flow. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:12,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:43:12,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:43:12,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:43:13,632 INFO L124 PetriNetUnfolderBase]: 1224/1916 cut-off events. [2024-06-27 20:43:13,632 INFO L125 PetriNetUnfolderBase]: For 2350/2352 co-relation queries the response was YES. [2024-06-27 20:43:13,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5767 conditions, 1916 events. 1224/1916 cut-off events. For 2350/2352 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 9243 event pairs, 330 based on Foata normal form. 12/1924 useless extension candidates. Maximal degree in co-relation 5750. Up to 1687 conditions per place. [2024-06-27 20:43:13,642 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 64 selfloop transitions, 19 changer transitions 0/89 dead transitions. [2024-06-27 20:43:13,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 89 transitions, 527 flow [2024-06-27 20:43:13,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:43:13,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:43:13,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 136 transitions. [2024-06-27 20:43:13,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5396825396825397 [2024-06-27 20:43:13,644 INFO L175 Difference]: Start difference. First operand has 51 places, 50 transitions, 237 flow. Second operand 6 states and 136 transitions. [2024-06-27 20:43:13,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 89 transitions, 527 flow [2024-06-27 20:43:13,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 89 transitions, 519 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-27 20:43:13,648 INFO L231 Difference]: Finished difference. Result has 56 places, 52 transitions, 293 flow [2024-06-27 20:43:13,648 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} [2024-06-27 20:43:13,649 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 13 predicate places. [2024-06-27 20:43:13,649 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 52 transitions, 293 flow [2024-06-27 20:43:13,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:13,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:43:13,649 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:43:13,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 20:43:13,650 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)] === [2024-06-27 20:43:13,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:43:13,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1232954154, now seen corresponding path program 1 times [2024-06-27 20:43:13,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:43:13,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099792829] [2024-06-27 20:43:13,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:43:13,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:43:13,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:43:14,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:43:14,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:43:14,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099792829] [2024-06-27 20:43:14,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099792829] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:43:14,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:43:14,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:43:14,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801945628] [2024-06-27 20:43:14,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:43:14,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:43:14,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:43:14,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:43:14,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:43:14,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:43:14,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 52 transitions, 293 flow. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:14,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:43:14,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:43:14,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:43:15,391 INFO L124 PetriNetUnfolderBase]: 1219/1906 cut-off events. [2024-06-27 20:43:15,391 INFO L125 PetriNetUnfolderBase]: For 3470/3470 co-relation queries the response was YES. [2024-06-27 20:43:15,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6271 conditions, 1906 events. 1219/1906 cut-off events. For 3470/3470 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 9186 event pairs, 468 based on Foata normal form. 2/1903 useless extension candidates. Maximal degree in co-relation 6250. Up to 1831 conditions per place. [2024-06-27 20:43:15,403 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 53 selfloop transitions, 8 changer transitions 0/66 dead transitions. [2024-06-27 20:43:15,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 66 transitions, 449 flow [2024-06-27 20:43:15,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:43:15,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:43:15,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 89 transitions. [2024-06-27 20:43:15,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4238095238095238 [2024-06-27 20:43:15,408 INFO L175 Difference]: Start difference. First operand has 56 places, 52 transitions, 293 flow. Second operand 5 states and 89 transitions. [2024-06-27 20:43:15,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 66 transitions, 449 flow [2024-06-27 20:43:15,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 66 transitions, 399 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-27 20:43:15,417 INFO L231 Difference]: Finished difference. Result has 57 places, 52 transitions, 267 flow [2024-06-27 20:43:15,418 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} [2024-06-27 20:43:15,420 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 14 predicate places. [2024-06-27 20:43:15,421 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 52 transitions, 267 flow [2024-06-27 20:43:15,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:15,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:43:15,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:43:15,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 20:43:15,421 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)] === [2024-06-27 20:43:15,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:43:15,422 INFO L85 PathProgramCache]: Analyzing trace with hash 398042689, now seen corresponding path program 1 times [2024-06-27 20:43:15,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:43:15,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204570772] [2024-06-27 20:43:15,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:43:15,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:43:15,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:43:16,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:43:16,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:43:16,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204570772] [2024-06-27 20:43:16,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204570772] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:43:16,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:43:16,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:43:16,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118535296] [2024-06-27 20:43:16,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:43:16,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:43:16,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:43:16,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:43:16,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:43:16,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:43:16,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 52 transitions, 267 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:16,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:43:16,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:43:16,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:43:17,718 INFO L124 PetriNetUnfolderBase]: 1209/1894 cut-off events. [2024-06-27 20:43:17,719 INFO L125 PetriNetUnfolderBase]: For 4025/4025 co-relation queries the response was YES. [2024-06-27 20:43:17,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6208 conditions, 1894 events. 1209/1894 cut-off events. For 4025/4025 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 9090 event pairs, 438 based on Foata normal form. 4/1896 useless extension candidates. Maximal degree in co-relation 6185. Up to 1795 conditions per place. [2024-06-27 20:43:17,729 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 59 selfloop transitions, 11 changer transitions 0/75 dead transitions. [2024-06-27 20:43:17,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 75 transitions, 473 flow [2024-06-27 20:43:17,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:43:17,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:43:17,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-27 20:43:17,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-27 20:43:17,731 INFO L175 Difference]: Start difference. First operand has 57 places, 52 transitions, 267 flow. Second operand 6 states and 106 transitions. [2024-06-27 20:43:17,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 75 transitions, 473 flow [2024-06-27 20:43:17,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 75 transitions, 451 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-27 20:43:17,735 INFO L231 Difference]: Finished difference. Result has 59 places, 55 transitions, 299 flow [2024-06-27 20:43:17,735 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=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=299, PETRI_PLACES=59, PETRI_TRANSITIONS=55} [2024-06-27 20:43:17,736 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 16 predicate places. [2024-06-27 20:43:17,736 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 55 transitions, 299 flow [2024-06-27 20:43:17,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:17,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:43:17,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:43:17,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 20:43:17,737 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)] === [2024-06-27 20:43:17,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:43:17,737 INFO L85 PathProgramCache]: Analyzing trace with hash 507022025, now seen corresponding path program 1 times [2024-06-27 20:43:17,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:43:17,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961598878] [2024-06-27 20:43:17,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:43:17,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:43:17,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:43:19,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:43:19,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:43:19,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961598878] [2024-06-27 20:43:19,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961598878] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:43:19,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:43:19,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:43:19,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832931225] [2024-06-27 20:43:19,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:43:19,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:43:19,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:43:19,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:43:19,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:43:19,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:43:19,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 55 transitions, 299 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:19,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:43:19,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:43:19,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:43:20,538 INFO L124 PetriNetUnfolderBase]: 1217/1905 cut-off events. [2024-06-27 20:43:20,539 INFO L125 PetriNetUnfolderBase]: For 5203/5207 co-relation queries the response was YES. [2024-06-27 20:43:20,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6693 conditions, 1905 events. 1217/1905 cut-off events. For 5203/5207 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 9164 event pairs, 449 based on Foata normal form. 8/1911 useless extension candidates. Maximal degree in co-relation 6670. Up to 1737 conditions per place. [2024-06-27 20:43:20,549 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 59 selfloop transitions, 19 changer transitions 0/83 dead transitions. [2024-06-27 20:43:20,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 83 transitions, 561 flow [2024-06-27 20:43:20,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:43:20,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:43:20,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 115 transitions. [2024-06-27 20:43:20,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45634920634920634 [2024-06-27 20:43:20,550 INFO L175 Difference]: Start difference. First operand has 59 places, 55 transitions, 299 flow. Second operand 6 states and 115 transitions. [2024-06-27 20:43:20,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 83 transitions, 561 flow [2024-06-27 20:43:20,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 83 transitions, 531 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-27 20:43:20,555 INFO L231 Difference]: Finished difference. Result has 61 places, 58 transitions, 341 flow [2024-06-27 20:43:20,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=341, PETRI_PLACES=61, PETRI_TRANSITIONS=58} [2024-06-27 20:43:20,555 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 18 predicate places. [2024-06-27 20:43:20,555 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 58 transitions, 341 flow [2024-06-27 20:43:20,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:20,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:43:20,556 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:43:20,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 20:43:20,556 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)] === [2024-06-27 20:43:20,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:43:20,557 INFO L85 PathProgramCache]: Analyzing trace with hash 542084885, now seen corresponding path program 2 times [2024-06-27 20:43:20,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:43:20,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198924126] [2024-06-27 20:43:20,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:43:20,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:43:20,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:43:22,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:43:22,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:43:22,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198924126] [2024-06-27 20:43:22,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198924126] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:43:22,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:43:22,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:43:22,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155173354] [2024-06-27 20:43:22,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:43:22,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:43:22,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:43:22,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:43:22,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:43:22,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:43:22,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 58 transitions, 341 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:22,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:43:22,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:43:22,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:43:23,050 INFO L124 PetriNetUnfolderBase]: 1205/1876 cut-off events. [2024-06-27 20:43:23,050 INFO L125 PetriNetUnfolderBase]: For 6242/6242 co-relation queries the response was YES. [2024-06-27 20:43:23,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6809 conditions, 1876 events. 1205/1876 cut-off events. For 6242/6242 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 8932 event pairs, 467 based on Foata normal form. 2/1873 useless extension candidates. Maximal degree in co-relation 6785. Up to 1721 conditions per place. [2024-06-27 20:43:23,058 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 52 selfloop transitions, 20 changer transitions 0/77 dead transitions. [2024-06-27 20:43:23,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 77 transitions, 531 flow [2024-06-27 20:43:23,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:43:23,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:43:23,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-27 20:43:23,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-27 20:43:23,061 INFO L175 Difference]: Start difference. First operand has 61 places, 58 transitions, 341 flow. Second operand 6 states and 110 transitions. [2024-06-27 20:43:23,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 77 transitions, 531 flow [2024-06-27 20:43:23,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 77 transitions, 502 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 20:43:23,065 INFO L231 Difference]: Finished difference. Result has 64 places, 58 transitions, 360 flow [2024-06-27 20:43:23,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=312, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=360, PETRI_PLACES=64, PETRI_TRANSITIONS=58} [2024-06-27 20:43:23,066 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 21 predicate places. [2024-06-27 20:43:23,066 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 58 transitions, 360 flow [2024-06-27 20:43:23,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:23,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:43:23,067 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:43:23,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 20:43:23,067 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)] === [2024-06-27 20:43:23,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:43:23,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1257898304, now seen corresponding path program 1 times [2024-06-27 20:43:23,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:43:23,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736955317] [2024-06-27 20:43:23,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:43:23,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:43:23,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:43:24,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:43:24,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:43:24,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736955317] [2024-06-27 20:43:24,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736955317] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:43:24,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:43:24,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:43:24,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871961781] [2024-06-27 20:43:24,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:43:24,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:43:24,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:43:24,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:43:24,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:43:24,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:43:24,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 58 transitions, 360 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:24,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:43:24,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:43:24,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:43:25,711 INFO L124 PetriNetUnfolderBase]: 1413/2216 cut-off events. [2024-06-27 20:43:25,711 INFO L125 PetriNetUnfolderBase]: For 8849/8849 co-relation queries the response was YES. [2024-06-27 20:43:25,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8341 conditions, 2216 events. 1413/2216 cut-off events. For 8849/8849 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 10934 event pairs, 393 based on Foata normal form. 8/2220 useless extension candidates. Maximal degree in co-relation 8316. Up to 1716 conditions per place. [2024-06-27 20:43:25,725 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 87 selfloop transitions, 39 changer transitions 0/131 dead transitions. [2024-06-27 20:43:25,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 131 transitions, 1029 flow [2024-06-27 20:43:25,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:43:25,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:43:25,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-27 20:43:25,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4791666666666667 [2024-06-27 20:43:25,727 INFO L175 Difference]: Start difference. First operand has 64 places, 58 transitions, 360 flow. Second operand 8 states and 161 transitions. [2024-06-27 20:43:25,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 131 transitions, 1029 flow [2024-06-27 20:43:25,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 131 transitions, 903 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-27 20:43:25,736 INFO L231 Difference]: Finished difference. Result has 69 places, 82 transitions, 581 flow [2024-06-27 20:43:25,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=581, PETRI_PLACES=69, PETRI_TRANSITIONS=82} [2024-06-27 20:43:25,737 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 26 predicate places. [2024-06-27 20:43:25,737 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 82 transitions, 581 flow [2024-06-27 20:43:25,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:25,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:43:25,737 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:43:25,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 20:43:25,738 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)] === [2024-06-27 20:43:25,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:43:25,738 INFO L85 PathProgramCache]: Analyzing trace with hash 89619298, now seen corresponding path program 2 times [2024-06-27 20:43:25,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:43:25,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122841822] [2024-06-27 20:43:25,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:43:25,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:43:25,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:43:27,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:43:27,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:43:27,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122841822] [2024-06-27 20:43:27,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122841822] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:43:27,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:43:27,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:43:27,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267742647] [2024-06-27 20:43:27,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:43:27,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:43:27,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:43:27,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:43:27,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:43:27,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:43:27,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 82 transitions, 581 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:27,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:43:27,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:43:27,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:43:29,093 INFO L124 PetriNetUnfolderBase]: 1501/2364 cut-off events. [2024-06-27 20:43:29,093 INFO L125 PetriNetUnfolderBase]: For 11624/11630 co-relation queries the response was YES. [2024-06-27 20:43:29,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9763 conditions, 2364 events. 1501/2364 cut-off events. For 11624/11630 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 11836 event pairs, 399 based on Foata normal form. 16/2376 useless extension candidates. Maximal degree in co-relation 9734. Up to 1772 conditions per place. [2024-06-27 20:43:29,105 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 71 selfloop transitions, 48 changer transitions 0/124 dead transitions. [2024-06-27 20:43:29,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 124 transitions, 1027 flow [2024-06-27 20:43:29,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:43:29,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:43:29,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-27 20:43:29,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46598639455782315 [2024-06-27 20:43:29,107 INFO L175 Difference]: Start difference. First operand has 69 places, 82 transitions, 581 flow. Second operand 7 states and 137 transitions. [2024-06-27 20:43:29,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 124 transitions, 1027 flow [2024-06-27 20:43:29,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 124 transitions, 999 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-27 20:43:29,117 INFO L231 Difference]: Finished difference. Result has 74 places, 89 transitions, 734 flow [2024-06-27 20:43:29,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=553, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=734, PETRI_PLACES=74, PETRI_TRANSITIONS=89} [2024-06-27 20:43:29,117 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 31 predicate places. [2024-06-27 20:43:29,118 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 89 transitions, 734 flow [2024-06-27 20:43:29,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:29,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:43:29,118 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:43:29,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 20:43:29,118 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)] === [2024-06-27 20:43:29,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:43:29,119 INFO L85 PathProgramCache]: Analyzing trace with hash -374998690, now seen corresponding path program 3 times [2024-06-27 20:43:29,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:43:29,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412143391] [2024-06-27 20:43:29,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:43:29,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:43:29,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:43:30,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:43:30,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:43:30,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412143391] [2024-06-27 20:43:30,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412143391] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:43:30,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:43:30,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:43:30,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376498710] [2024-06-27 20:43:30,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:43:30,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:43:30,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:43:30,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:43:30,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:43:30,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:43:30,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 89 transitions, 734 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:30,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:43:30,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:43:30,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:43:32,120 INFO L124 PetriNetUnfolderBase]: 1545/2425 cut-off events. [2024-06-27 20:43:32,120 INFO L125 PetriNetUnfolderBase]: For 14395/14403 co-relation queries the response was YES. [2024-06-27 20:43:32,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10791 conditions, 2425 events. 1545/2425 cut-off events. For 14395/14403 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 12104 event pairs, 416 based on Foata normal form. 12/2430 useless extension candidates. Maximal degree in co-relation 10760. Up to 1790 conditions per place. [2024-06-27 20:43:32,132 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 67 selfloop transitions, 60 changer transitions 0/132 dead transitions. [2024-06-27 20:43:32,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 132 transitions, 1288 flow [2024-06-27 20:43:32,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:43:32,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:43:32,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-27 20:43:32,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46258503401360546 [2024-06-27 20:43:32,133 INFO L175 Difference]: Start difference. First operand has 74 places, 89 transitions, 734 flow. Second operand 7 states and 136 transitions. [2024-06-27 20:43:32,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 132 transitions, 1288 flow [2024-06-27 20:43:32,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 132 transitions, 1172 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-27 20:43:32,147 INFO L231 Difference]: Finished difference. Result has 77 places, 99 transitions, 882 flow [2024-06-27 20:43:32,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=638, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=882, PETRI_PLACES=77, PETRI_TRANSITIONS=99} [2024-06-27 20:43:32,148 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 34 predicate places. [2024-06-27 20:43:32,148 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 99 transitions, 882 flow [2024-06-27 20:43:32,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:32,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:43:32,149 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:43:32,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 20:43:32,149 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)] === [2024-06-27 20:43:32,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:43:32,149 INFO L85 PathProgramCache]: Analyzing trace with hash 266750818, now seen corresponding path program 4 times [2024-06-27 20:43:32,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:43:32,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032646940] [2024-06-27 20:43:32,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:43:32,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:43:32,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:43:34,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:43:34,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:43:34,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032646940] [2024-06-27 20:43:34,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032646940] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:43:34,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:43:34,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:43:34,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895040009] [2024-06-27 20:43:34,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:43:34,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:43:34,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:43:34,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:43:34,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:43:34,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:43:34,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 99 transitions, 882 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:34,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:43:34,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:43:34,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:43:35,146 INFO L124 PetriNetUnfolderBase]: 1529/2403 cut-off events. [2024-06-27 20:43:35,147 INFO L125 PetriNetUnfolderBase]: For 14727/14731 co-relation queries the response was YES. [2024-06-27 20:43:35,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10622 conditions, 2403 events. 1529/2403 cut-off events. For 14727/14731 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 11987 event pairs, 425 based on Foata normal form. 8/2404 useless extension candidates. Maximal degree in co-relation 10590. Up to 1783 conditions per place. [2024-06-27 20:43:35,161 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 67 selfloop transitions, 58 changer transitions 0/130 dead transitions. [2024-06-27 20:43:35,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 130 transitions, 1262 flow [2024-06-27 20:43:35,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:43:35,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:43:35,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-27 20:43:35,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45918367346938777 [2024-06-27 20:43:35,162 INFO L175 Difference]: Start difference. First operand has 77 places, 99 transitions, 882 flow. Second operand 7 states and 135 transitions. [2024-06-27 20:43:35,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 130 transitions, 1262 flow [2024-06-27 20:43:35,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 130 transitions, 1166 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-27 20:43:35,178 INFO L231 Difference]: Finished difference. Result has 81 places, 99 transitions, 912 flow [2024-06-27 20:43:35,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=786, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=912, PETRI_PLACES=81, PETRI_TRANSITIONS=99} [2024-06-27 20:43:35,179 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 38 predicate places. [2024-06-27 20:43:35,179 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 99 transitions, 912 flow [2024-06-27 20:43:35,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:35,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:43:35,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:43:35,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 20:43:35,179 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)] === [2024-06-27 20:43:35,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:43:35,180 INFO L85 PathProgramCache]: Analyzing trace with hash -2070140399, now seen corresponding path program 1 times [2024-06-27 20:43:35,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:43:35,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000508739] [2024-06-27 20:43:35,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:43:35,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:43:35,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:43:37,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:43:37,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:43:37,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000508739] [2024-06-27 20:43:37,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000508739] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:43:37,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:43:37,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:43:37,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512892113] [2024-06-27 20:43:37,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:43:37,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:43:37,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:43:37,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:43:37,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:43:37,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:43:37,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 99 transitions, 912 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:37,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:43:37,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:43:37,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:43:38,531 INFO L124 PetriNetUnfolderBase]: 1581/2511 cut-off events. [2024-06-27 20:43:38,532 INFO L125 PetriNetUnfolderBase]: For 17363/17369 co-relation queries the response was YES. [2024-06-27 20:43:38,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11278 conditions, 2511 events. 1581/2511 cut-off events. For 17363/17369 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 12845 event pairs, 418 based on Foata normal form. 12/2519 useless extension candidates. Maximal degree in co-relation 11244. Up to 1827 conditions per place. [2024-06-27 20:43:38,562 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 79 selfloop transitions, 62 changer transitions 0/146 dead transitions. [2024-06-27 20:43:38,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 146 transitions, 1446 flow [2024-06-27 20:43:38,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:43:38,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:43:38,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-27 20:43:38,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-27 20:43:38,564 INFO L175 Difference]: Start difference. First operand has 81 places, 99 transitions, 912 flow. Second operand 8 states and 154 transitions. [2024-06-27 20:43:38,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 146 transitions, 1446 flow [2024-06-27 20:43:38,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 146 transitions, 1291 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-27 20:43:38,595 INFO L231 Difference]: Finished difference. Result has 83 places, 105 transitions, 981 flow [2024-06-27 20:43:38,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=769, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=981, PETRI_PLACES=83, PETRI_TRANSITIONS=105} [2024-06-27 20:43:38,596 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 40 predicate places. [2024-06-27 20:43:38,596 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 105 transitions, 981 flow [2024-06-27 20:43:38,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:38,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:43:38,597 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:43:38,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 20:43:38,597 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)] === [2024-06-27 20:43:38,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:43:38,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1516772915, now seen corresponding path program 2 times [2024-06-27 20:43:38,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:43:38,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32712469] [2024-06-27 20:43:38,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:43:38,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:43:38,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:43:40,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:43:40,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:43:40,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32712469] [2024-06-27 20:43:40,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32712469] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:43:40,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:43:40,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:43:40,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094965358] [2024-06-27 20:43:40,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:43:40,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:43:40,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:43:40,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:43:40,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:43:40,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:43:40,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 105 transitions, 981 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:40,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:43:40,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:43:40,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:43:41,739 INFO L124 PetriNetUnfolderBase]: 1748/2805 cut-off events. [2024-06-27 20:43:41,740 INFO L125 PetriNetUnfolderBase]: For 21190/21213 co-relation queries the response was YES. [2024-06-27 20:43:41,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12883 conditions, 2805 events. 1748/2805 cut-off events. For 21190/21213 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 14841 event pairs, 494 based on Foata normal form. 15/2812 useless extension candidates. Maximal degree in co-relation 12848. Up to 1948 conditions per place. [2024-06-27 20:43:41,755 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 79 selfloop transitions, 86 changer transitions 0/170 dead transitions. [2024-06-27 20:43:41,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 170 transitions, 1887 flow [2024-06-27 20:43:41,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:43:41,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:43:41,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-27 20:43:41,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45535714285714285 [2024-06-27 20:43:41,757 INFO L175 Difference]: Start difference. First operand has 83 places, 105 transitions, 981 flow. Second operand 8 states and 153 transitions. [2024-06-27 20:43:41,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 170 transitions, 1887 flow [2024-06-27 20:43:41,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 170 transitions, 1667 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-27 20:43:41,778 INFO L231 Difference]: Finished difference. Result has 89 places, 133 transitions, 1411 flow [2024-06-27 20:43:41,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=829, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1411, PETRI_PLACES=89, PETRI_TRANSITIONS=133} [2024-06-27 20:43:41,779 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 46 predicate places. [2024-06-27 20:43:41,779 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 133 transitions, 1411 flow [2024-06-27 20:43:41,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:41,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:43:41,779 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:43:41,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 20:43:41,780 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)] === [2024-06-27 20:43:41,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:43:41,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1259944221, now seen corresponding path program 3 times [2024-06-27 20:43:41,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:43:41,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605221132] [2024-06-27 20:43:41,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:43:41,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:43:41,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:43:43,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:43:43,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:43:43,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605221132] [2024-06-27 20:43:43,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605221132] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:43:43,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:43:43,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:43:43,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552777814] [2024-06-27 20:43:43,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:43:43,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:43:43,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:43:43,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:43:43,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:43:43,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:43:43,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 133 transitions, 1411 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:43,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:43:43,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:43:43,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:43:45,371 INFO L124 PetriNetUnfolderBase]: 1792/2876 cut-off events. [2024-06-27 20:43:45,371 INFO L125 PetriNetUnfolderBase]: For 23618/23632 co-relation queries the response was YES. [2024-06-27 20:43:45,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13976 conditions, 2876 events. 1792/2876 cut-off events. For 23618/23632 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 15338 event pairs, 435 based on Foata normal form. 13/2884 useless extension candidates. Maximal degree in co-relation 13936. Up to 1986 conditions per place. [2024-06-27 20:43:45,401 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 83 selfloop transitions, 96 changer transitions 0/184 dead transitions. [2024-06-27 20:43:45,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 184 transitions, 2099 flow [2024-06-27 20:43:45,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:43:45,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:43:45,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-27 20:43:45,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497354497354497 [2024-06-27 20:43:45,418 INFO L175 Difference]: Start difference. First operand has 89 places, 133 transitions, 1411 flow. Second operand 9 states and 170 transitions. [2024-06-27 20:43:45,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 184 transitions, 2099 flow [2024-06-27 20:43:45,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 184 transitions, 1994 flow, removed 14 selfloop flow, removed 2 redundant places. [2024-06-27 20:43:45,446 INFO L231 Difference]: Finished difference. Result has 96 places, 139 transitions, 1603 flow [2024-06-27 20:43:45,447 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1312, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1603, PETRI_PLACES=96, PETRI_TRANSITIONS=139} [2024-06-27 20:43:45,448 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 53 predicate places. [2024-06-27 20:43:45,448 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 139 transitions, 1603 flow [2024-06-27 20:43:45,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:45,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:43:45,448 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:43:45,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 20:43:45,449 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)] === [2024-06-27 20:43:45,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:43:45,449 INFO L85 PathProgramCache]: Analyzing trace with hash -320657511, now seen corresponding path program 4 times [2024-06-27 20:43:45,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:43:45,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131184663] [2024-06-27 20:43:45,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:43:45,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:43:45,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:43:47,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:43:47,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:43:47,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131184663] [2024-06-27 20:43:47,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131184663] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:43:47,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:43:47,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:43:47,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935671588] [2024-06-27 20:43:47,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:43:47,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:43:47,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:43:47,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:43:47,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:43:47,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:43:47,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 139 transitions, 1603 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:47,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:43:47,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:43:47,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:43:48,944 INFO L124 PetriNetUnfolderBase]: 1776/2820 cut-off events. [2024-06-27 20:43:48,945 INFO L125 PetriNetUnfolderBase]: For 27797/27807 co-relation queries the response was YES. [2024-06-27 20:43:48,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14068 conditions, 2820 events. 1776/2820 cut-off events. For 27797/27807 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 14753 event pairs, 477 based on Foata normal form. 9/2824 useless extension candidates. Maximal degree in co-relation 14026. Up to 1973 conditions per place. [2024-06-27 20:43:48,960 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 76 selfloop transitions, 94 changer transitions 0/175 dead transitions. [2024-06-27 20:43:48,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 175 transitions, 2103 flow [2024-06-27 20:43:48,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:43:48,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:43:48,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-27 20:43:48,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-27 20:43:48,963 INFO L175 Difference]: Start difference. First operand has 96 places, 139 transitions, 1603 flow. Second operand 8 states and 152 transitions. [2024-06-27 20:43:48,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 175 transitions, 2103 flow [2024-06-27 20:43:48,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 175 transitions, 1855 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-27 20:43:48,989 INFO L231 Difference]: Finished difference. Result has 98 places, 139 transitions, 1554 flow [2024-06-27 20:43:48,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1355, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1554, PETRI_PLACES=98, PETRI_TRANSITIONS=139} [2024-06-27 20:43:48,990 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 55 predicate places. [2024-06-27 20:43:48,990 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 139 transitions, 1554 flow [2024-06-27 20:43:48,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:48,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:43:48,991 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:43:48,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 20:43:48,991 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)] === [2024-06-27 20:43:48,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:43:48,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1428787533, now seen corresponding path program 5 times [2024-06-27 20:43:48,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:43:48,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546984565] [2024-06-27 20:43:48,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:43:48,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:43:49,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:43:50,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:43:50,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:43:50,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546984565] [2024-06-27 20:43:50,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546984565] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:43:50,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:43:50,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:43:50,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630754296] [2024-06-27 20:43:50,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:43:50,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:43:50,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:43:50,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:43:50,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:43:50,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:43:50,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 139 transitions, 1554 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:50,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:43:50,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:43:50,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:43:51,862 INFO L124 PetriNetUnfolderBase]: 1871/3023 cut-off events. [2024-06-27 20:43:51,862 INFO L125 PetriNetUnfolderBase]: For 30354/30376 co-relation queries the response was YES. [2024-06-27 20:43:51,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14952 conditions, 3023 events. 1871/3023 cut-off events. For 30354/30376 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 16463 event pairs, 447 based on Foata normal form. 26/3045 useless extension candidates. Maximal degree in co-relation 14909. Up to 2051 conditions per place. [2024-06-27 20:43:51,879 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 89 selfloop transitions, 113 changer transitions 0/207 dead transitions. [2024-06-27 20:43:51,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 207 transitions, 2435 flow [2024-06-27 20:43:51,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:43:51,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:43:51,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-27 20:43:51,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-27 20:43:51,881 INFO L175 Difference]: Start difference. First operand has 98 places, 139 transitions, 1554 flow. Second operand 8 states and 160 transitions. [2024-06-27 20:43:51,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 207 transitions, 2435 flow [2024-06-27 20:43:51,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 207 transitions, 2175 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-27 20:43:51,911 INFO L231 Difference]: Finished difference. Result has 101 places, 165 transitions, 1984 flow [2024-06-27 20:43:51,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1346, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1984, PETRI_PLACES=101, PETRI_TRANSITIONS=165} [2024-06-27 20:43:51,911 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 58 predicate places. [2024-06-27 20:43:51,911 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 165 transitions, 1984 flow [2024-06-27 20:43:51,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:51,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:43:51,912 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:43:51,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 20:43:51,912 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)] === [2024-06-27 20:43:51,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:43:51,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1260221268, now seen corresponding path program 1 times [2024-06-27 20:43:51,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:43:51,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085053186] [2024-06-27 20:43:51,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:43:51,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:43:51,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:43:53,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:43:53,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:43:53,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085053186] [2024-06-27 20:43:53,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085053186] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:43:53,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:43:53,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:43:53,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899072102] [2024-06-27 20:43:53,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:43:53,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:43:53,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:43:53,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:43:53,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:43:54,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:43:54,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 165 transitions, 1984 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:54,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:43:54,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:43:54,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:43:55,218 INFO L124 PetriNetUnfolderBase]: 1863/3003 cut-off events. [2024-06-27 20:43:55,218 INFO L125 PetriNetUnfolderBase]: For 32524/32526 co-relation queries the response was YES. [2024-06-27 20:43:55,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15413 conditions, 3003 events. 1863/3003 cut-off events. For 32524/32526 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 16194 event pairs, 556 based on Foata normal form. 4/3005 useless extension candidates. Maximal degree in co-relation 15367. Up to 2725 conditions per place. [2024-06-27 20:43:55,239 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 177 selfloop transitions, 17 changer transitions 0/199 dead transitions. [2024-06-27 20:43:55,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 199 transitions, 2501 flow [2024-06-27 20:43:55,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:43:55,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:43:55,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-27 20:43:55,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-27 20:43:55,241 INFO L175 Difference]: Start difference. First operand has 101 places, 165 transitions, 1984 flow. Second operand 8 states and 137 transitions. [2024-06-27 20:43:55,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 199 transitions, 2501 flow [2024-06-27 20:43:55,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 199 transitions, 2243 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 20:43:55,284 INFO L231 Difference]: Finished difference. Result has 104 places, 170 transitions, 1826 flow [2024-06-27 20:43:55,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1731, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1826, PETRI_PLACES=104, PETRI_TRANSITIONS=170} [2024-06-27 20:43:55,285 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 61 predicate places. [2024-06-27 20:43:55,285 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 170 transitions, 1826 flow [2024-06-27 20:43:55,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:55,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:43:55,285 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:43:55,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 20:43:55,285 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:43:55,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:43:55,286 INFO L85 PathProgramCache]: Analyzing trace with hash -728737656, now seen corresponding path program 1 times [2024-06-27 20:43:55,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:43:55,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686224789] [2024-06-27 20:43:55,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:43:55,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:43:55,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:43:56,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:43:56,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:43:56,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686224789] [2024-06-27 20:43:56,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686224789] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:43:56,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:43:56,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:43:56,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001176549] [2024-06-27 20:43:56,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:43:56,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:43:56,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:43:56,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:43:56,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:43:56,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:43:56,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 170 transitions, 1826 flow. Second operand has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:56,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:43:56,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:43:56,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:43:56,916 INFO L124 PetriNetUnfolderBase]: 1738/2817 cut-off events. [2024-06-27 20:43:56,916 INFO L125 PetriNetUnfolderBase]: For 31602/31636 co-relation queries the response was YES. [2024-06-27 20:43:56,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14561 conditions, 2817 events. 1738/2817 cut-off events. For 31602/31636 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 15295 event pairs, 503 based on Foata normal form. 14/2811 useless extension candidates. Maximal degree in co-relation 14514. Up to 2532 conditions per place. [2024-06-27 20:43:56,934 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 159 selfloop transitions, 9 changer transitions 0/182 dead transitions. [2024-06-27 20:43:56,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 182 transitions, 2208 flow [2024-06-27 20:43:56,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:43:56,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:43:56,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 88 transitions. [2024-06-27 20:43:56,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41904761904761906 [2024-06-27 20:43:56,935 INFO L175 Difference]: Start difference. First operand has 104 places, 170 transitions, 1826 flow. Second operand 5 states and 88 transitions. [2024-06-27 20:43:56,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 182 transitions, 2208 flow [2024-06-27 20:43:56,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 182 transitions, 2161 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-27 20:43:56,970 INFO L231 Difference]: Finished difference. Result has 104 places, 173 transitions, 1831 flow [2024-06-27 20:43:56,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1779, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1831, PETRI_PLACES=104, PETRI_TRANSITIONS=173} [2024-06-27 20:43:56,971 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 61 predicate places. [2024-06-27 20:43:56,971 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 173 transitions, 1831 flow [2024-06-27 20:43:56,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:56,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:43:56,971 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:43:56,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 20:43:56,972 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)] === [2024-06-27 20:43:56,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:43:56,972 INFO L85 PathProgramCache]: Analyzing trace with hash 2114204483, now seen corresponding path program 1 times [2024-06-27 20:43:56,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:43:56,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397268559] [2024-06-27 20:43:56,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:43:56,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:43:57,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:43:58,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:43:58,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:43:58,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397268559] [2024-06-27 20:43:58,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397268559] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:43:58,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:43:58,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:43:58,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685867892] [2024-06-27 20:43:58,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:43:58,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:43:58,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:43:58,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:43:58,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:43:58,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:43:58,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 173 transitions, 1831 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:58,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:43:58,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:43:58,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:43:59,682 INFO L124 PetriNetUnfolderBase]: 1880/3036 cut-off events. [2024-06-27 20:43:59,682 INFO L125 PetriNetUnfolderBase]: For 33700/33718 co-relation queries the response was YES. [2024-06-27 20:43:59,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15655 conditions, 3036 events. 1880/3036 cut-off events. For 33700/33718 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 16458 event pairs, 330 based on Foata normal form. 20/3054 useless extension candidates. Maximal degree in co-relation 15607. Up to 2415 conditions per place. [2024-06-27 20:43:59,700 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 158 selfloop transitions, 45 changer transitions 0/208 dead transitions. [2024-06-27 20:43:59,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 208 transitions, 2439 flow [2024-06-27 20:43:59,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:43:59,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:43:59,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-27 20:43:59,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445578231292517 [2024-06-27 20:43:59,704 INFO L175 Difference]: Start difference. First operand has 104 places, 173 transitions, 1831 flow. Second operand 7 states and 131 transitions. [2024-06-27 20:43:59,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 208 transitions, 2439 flow [2024-06-27 20:43:59,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 208 transitions, 2409 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-27 20:43:59,746 INFO L231 Difference]: Finished difference. Result has 108 places, 177 transitions, 1946 flow [2024-06-27 20:43:59,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1801, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1946, PETRI_PLACES=108, PETRI_TRANSITIONS=177} [2024-06-27 20:43:59,748 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 65 predicate places. [2024-06-27 20:43:59,748 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 177 transitions, 1946 flow [2024-06-27 20:43:59,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:59,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:43:59,748 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:43:59,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 20:43:59,749 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)] === [2024-06-27 20:43:59,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:43:59,750 INFO L85 PathProgramCache]: Analyzing trace with hash 2117061443, now seen corresponding path program 2 times [2024-06-27 20:43:59,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:43:59,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447787605] [2024-06-27 20:43:59,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:43:59,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:43:59,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:44:01,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:44:01,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:44:01,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447787605] [2024-06-27 20:44:01,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447787605] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:44:01,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:44:01,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:44:01,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623428021] [2024-06-27 20:44:01,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:44:01,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:44:01,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:44:01,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:44:01,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:44:01,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:44:01,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 177 transitions, 1946 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:01,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:44:01,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:44:01,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:44:02,909 INFO L124 PetriNetUnfolderBase]: 1872/3014 cut-off events. [2024-06-27 20:44:02,910 INFO L125 PetriNetUnfolderBase]: For 36457/36463 co-relation queries the response was YES. [2024-06-27 20:44:02,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16025 conditions, 3014 events. 1872/3014 cut-off events. For 36457/36463 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 16156 event pairs, 431 based on Foata normal form. 8/3020 useless extension candidates. Maximal degree in co-relation 15976. Up to 2535 conditions per place. [2024-06-27 20:44:02,930 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 150 selfloop transitions, 51 changer transitions 0/206 dead transitions. [2024-06-27 20:44:02,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 206 transitions, 2438 flow [2024-06-27 20:44:02,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:44:02,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:44:02,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-27 20:44:02,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4387755102040816 [2024-06-27 20:44:02,932 INFO L175 Difference]: Start difference. First operand has 108 places, 177 transitions, 1946 flow. Second operand 7 states and 129 transitions. [2024-06-27 20:44:02,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 206 transitions, 2438 flow [2024-06-27 20:44:02,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 206 transitions, 2364 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-27 20:44:02,981 INFO L231 Difference]: Finished difference. Result has 112 places, 177 transitions, 1984 flow [2024-06-27 20:44:02,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1872, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1984, PETRI_PLACES=112, PETRI_TRANSITIONS=177} [2024-06-27 20:44:02,982 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 69 predicate places. [2024-06-27 20:44:02,982 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 177 transitions, 1984 flow [2024-06-27 20:44:02,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:02,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:44:02,983 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:44:02,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 20:44:02,983 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:44:02,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:44:02,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1116029150, now seen corresponding path program 1 times [2024-06-27 20:44:02,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:44:02,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937447030] [2024-06-27 20:44:02,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:44:02,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:44:02,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:44:04,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:44:04,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:44:04,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937447030] [2024-06-27 20:44:04,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937447030] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:44:04,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:44:04,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:44:04,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964484516] [2024-06-27 20:44:04,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:44:04,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:44:04,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:44:04,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:44:04,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:44:04,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:44:04,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 177 transitions, 1984 flow. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:04,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:44:04,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:44:04,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:44:05,060 INFO L124 PetriNetUnfolderBase]: 1740/2826 cut-off events. [2024-06-27 20:44:05,060 INFO L125 PetriNetUnfolderBase]: For 39838/39872 co-relation queries the response was YES. [2024-06-27 20:44:05,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15472 conditions, 2826 events. 1740/2826 cut-off events. For 39838/39872 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 15418 event pairs, 488 based on Foata normal form. 14/2820 useless extension candidates. Maximal degree in co-relation 15421. Up to 2537 conditions per place. [2024-06-27 20:44:05,079 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 162 selfloop transitions, 12 changer transitions 0/190 dead transitions. [2024-06-27 20:44:05,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 190 transitions, 2384 flow [2024-06-27 20:44:05,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:44:05,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:44:05,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-27 20:44:05,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4007936507936508 [2024-06-27 20:44:05,080 INFO L175 Difference]: Start difference. First operand has 112 places, 177 transitions, 1984 flow. Second operand 6 states and 101 transitions. [2024-06-27 20:44:05,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 190 transitions, 2384 flow [2024-06-27 20:44:05,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 190 transitions, 2269 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 20:44:05,121 INFO L231 Difference]: Finished difference. Result has 112 places, 180 transitions, 1931 flow [2024-06-27 20:44:05,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1869, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1931, PETRI_PLACES=112, PETRI_TRANSITIONS=180} [2024-06-27 20:44:05,122 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 69 predicate places. [2024-06-27 20:44:05,122 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 180 transitions, 1931 flow [2024-06-27 20:44:05,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:05,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:44:05,122 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:44:05,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 20:44:05,122 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:44:05,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:44:05,123 INFO L85 PathProgramCache]: Analyzing trace with hash 341266616, now seen corresponding path program 1 times [2024-06-27 20:44:05,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:44:05,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751781510] [2024-06-27 20:44:05,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:44:05,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:44:05,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:44:07,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:44:07,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:44:07,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751781510] [2024-06-27 20:44:07,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751781510] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:44:07,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:44:07,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:44:07,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535788935] [2024-06-27 20:44:07,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:44:07,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:44:07,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:44:07,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:44:07,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:44:07,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:44:07,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 180 transitions, 1931 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:07,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:44:07,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:44:07,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:44:08,391 INFO L124 PetriNetUnfolderBase]: 2033/3306 cut-off events. [2024-06-27 20:44:08,392 INFO L125 PetriNetUnfolderBase]: For 48706/48710 co-relation queries the response was YES. [2024-06-27 20:44:08,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17724 conditions, 3306 events. 2033/3306 cut-off events. For 48706/48710 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 18361 event pairs, 407 based on Foata normal form. 16/3319 useless extension candidates. Maximal degree in co-relation 17672. Up to 1513 conditions per place. [2024-06-27 20:44:08,410 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 117 selfloop transitions, 105 changer transitions 0/227 dead transitions. [2024-06-27 20:44:08,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 227 transitions, 2629 flow [2024-06-27 20:44:08,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:44:08,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:44:08,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-27 20:44:08,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47023809523809523 [2024-06-27 20:44:08,412 INFO L175 Difference]: Start difference. First operand has 112 places, 180 transitions, 1931 flow. Second operand 8 states and 158 transitions. [2024-06-27 20:44:08,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 227 transitions, 2629 flow [2024-06-27 20:44:08,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 227 transitions, 2589 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-27 20:44:08,474 INFO L231 Difference]: Finished difference. Result has 116 places, 182 transitions, 2145 flow [2024-06-27 20:44:08,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1891, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2145, PETRI_PLACES=116, PETRI_TRANSITIONS=182} [2024-06-27 20:44:08,475 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 73 predicate places. [2024-06-27 20:44:08,476 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 182 transitions, 2145 flow [2024-06-27 20:44:08,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:08,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:44:08,476 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:44:08,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 20:44:08,476 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)] === [2024-06-27 20:44:08,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:44:08,477 INFO L85 PathProgramCache]: Analyzing trace with hash -904004936, now seen corresponding path program 2 times [2024-06-27 20:44:08,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:44:08,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468528725] [2024-06-27 20:44:08,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:44:08,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:44:08,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:44:10,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:44:10,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:44:10,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468528725] [2024-06-27 20:44:10,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468528725] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:44:10,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:44:10,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:44:10,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062605419] [2024-06-27 20:44:10,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:44:10,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:44:10,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:44:10,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:44:10,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:44:10,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:44:10,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 182 transitions, 2145 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:10,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:44:10,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:44:10,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:44:12,157 INFO L124 PetriNetUnfolderBase]: 2141/3480 cut-off events. [2024-06-27 20:44:12,158 INFO L125 PetriNetUnfolderBase]: For 57010/57018 co-relation queries the response was YES. [2024-06-27 20:44:12,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19237 conditions, 3480 events. 2141/3480 cut-off events. For 57010/57018 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 19559 event pairs, 496 based on Foata normal form. 28/3505 useless extension candidates. Maximal degree in co-relation 19184. Up to 2283 conditions per place. [2024-06-27 20:44:12,182 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 102 selfloop transitions, 117 changer transitions 0/224 dead transitions. [2024-06-27 20:44:12,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 224 transitions, 2741 flow [2024-06-27 20:44:12,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:44:12,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:44:12,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-27 20:44:12,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46130952380952384 [2024-06-27 20:44:12,184 INFO L175 Difference]: Start difference. First operand has 116 places, 182 transitions, 2145 flow. Second operand 8 states and 155 transitions. [2024-06-27 20:44:12,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 224 transitions, 2741 flow [2024-06-27 20:44:12,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 224 transitions, 2622 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-27 20:44:12,254 INFO L231 Difference]: Finished difference. Result has 120 places, 184 transitions, 2306 flow [2024-06-27 20:44:12,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2026, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2306, PETRI_PLACES=120, PETRI_TRANSITIONS=184} [2024-06-27 20:44:12,255 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 77 predicate places. [2024-06-27 20:44:12,255 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 184 transitions, 2306 flow [2024-06-27 20:44:12,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:12,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:44:12,256 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:44:12,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 20:44:12,256 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)] === [2024-06-27 20:44:12,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:44:12,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1608664166, now seen corresponding path program 3 times [2024-06-27 20:44:12,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:44:12,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397194165] [2024-06-27 20:44:12,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:44:12,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:44:12,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:44:14,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:44:14,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:44:14,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397194165] [2024-06-27 20:44:14,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397194165] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:44:14,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:44:14,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:44:14,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696731393] [2024-06-27 20:44:14,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:44:14,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:44:14,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:44:14,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:44:14,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:44:14,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:44:14,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 184 transitions, 2306 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:14,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:44:14,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:44:14,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:44:15,967 INFO L124 PetriNetUnfolderBase]: 2209/3604 cut-off events. [2024-06-27 20:44:15,968 INFO L125 PetriNetUnfolderBase]: For 61107/61111 co-relation queries the response was YES. [2024-06-27 20:44:15,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20643 conditions, 3604 events. 2209/3604 cut-off events. For 61107/61111 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 20554 event pairs, 512 based on Foata normal form. 16/3617 useless extension candidates. Maximal degree in co-relation 20588. Up to 2251 conditions per place. [2024-06-27 20:44:15,994 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 105 selfloop transitions, 118 changer transitions 0/228 dead transitions. [2024-06-27 20:44:15,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 228 transitions, 2910 flow [2024-06-27 20:44:15,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:44:15,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:44:15,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-27 20:44:15,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47023809523809523 [2024-06-27 20:44:15,995 INFO L175 Difference]: Start difference. First operand has 120 places, 184 transitions, 2306 flow. Second operand 8 states and 158 transitions. [2024-06-27 20:44:15,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 228 transitions, 2910 flow [2024-06-27 20:44:16,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 228 transitions, 2670 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-27 20:44:16,069 INFO L231 Difference]: Finished difference. Result has 122 places, 185 transitions, 2332 flow [2024-06-27 20:44:16,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2066, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2332, PETRI_PLACES=122, PETRI_TRANSITIONS=185} [2024-06-27 20:44:16,069 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 79 predicate places. [2024-06-27 20:44:16,069 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 185 transitions, 2332 flow [2024-06-27 20:44:16,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:16,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:44:16,070 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:44:16,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 20:44:16,070 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)] === [2024-06-27 20:44:16,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:44:16,070 INFO L85 PathProgramCache]: Analyzing trace with hash 483456176, now seen corresponding path program 4 times [2024-06-27 20:44:16,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:44:16,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16343133] [2024-06-27 20:44:16,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:44:16,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:44:16,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:44:18,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:44:18,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:44:18,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16343133] [2024-06-27 20:44:18,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16343133] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:44:18,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:44:18,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:44:18,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236928086] [2024-06-27 20:44:18,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:44:18,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:44:18,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:44:18,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:44:18,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:44:18,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:44:18,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 185 transitions, 2332 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:18,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:44:18,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:44:18,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:44:19,799 INFO L124 PetriNetUnfolderBase]: 2345/3887 cut-off events. [2024-06-27 20:44:19,800 INFO L125 PetriNetUnfolderBase]: For 70319/70339 co-relation queries the response was YES. [2024-06-27 20:44:19,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22045 conditions, 3887 events. 2345/3887 cut-off events. For 70319/70339 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 22943 event pairs, 431 based on Foata normal form. 34/3918 useless extension candidates. Maximal degree in co-relation 21989. Up to 2267 conditions per place. [2024-06-27 20:44:19,831 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 105 selfloop transitions, 126 changer transitions 0/236 dead transitions. [2024-06-27 20:44:19,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 236 transitions, 3094 flow [2024-06-27 20:44:19,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:44:19,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:44:19,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-27 20:44:19,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4880952380952381 [2024-06-27 20:44:19,839 INFO L175 Difference]: Start difference. First operand has 122 places, 185 transitions, 2332 flow. Second operand 8 states and 164 transitions. [2024-06-27 20:44:19,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 236 transitions, 3094 flow [2024-06-27 20:44:19,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 236 transitions, 2846 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-27 20:44:19,925 INFO L231 Difference]: Finished difference. Result has 124 places, 187 transitions, 2392 flow [2024-06-27 20:44:19,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2084, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2392, PETRI_PLACES=124, PETRI_TRANSITIONS=187} [2024-06-27 20:44:19,926 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 81 predicate places. [2024-06-27 20:44:19,927 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 187 transitions, 2392 flow [2024-06-27 20:44:19,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:19,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:44:19,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:44:19,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 20:44:19,927 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)] === [2024-06-27 20:44:19,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:44:19,956 INFO L85 PathProgramCache]: Analyzing trace with hash -378411506, now seen corresponding path program 5 times [2024-06-27 20:44:19,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:44:19,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040183644] [2024-06-27 20:44:19,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:44:19,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:44:19,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:44:22,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:44:22,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:44:22,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040183644] [2024-06-27 20:44:22,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040183644] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:44:22,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:44:22,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:44:22,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255827198] [2024-06-27 20:44:22,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:44:22,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:44:22,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:44:22,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:44:22,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:44:22,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:44:22,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 187 transitions, 2392 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:22,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:44:22,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:44:22,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:44:24,104 INFO L124 PetriNetUnfolderBase]: 2433/4010 cut-off events. [2024-06-27 20:44:24,104 INFO L125 PetriNetUnfolderBase]: For 76524/76532 co-relation queries the response was YES. [2024-06-27 20:44:24,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22823 conditions, 4010 events. 2433/4010 cut-off events. For 76524/76532 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 23720 event pairs, 566 based on Foata normal form. 24/4031 useless extension candidates. Maximal degree in co-relation 22766. Up to 2815 conditions per place. [2024-06-27 20:44:24,133 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 114 selfloop transitions, 116 changer transitions 0/235 dead transitions. [2024-06-27 20:44:24,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 235 transitions, 3034 flow [2024-06-27 20:44:24,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:44:24,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:44:24,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-27 20:44:24,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-27 20:44:24,136 INFO L175 Difference]: Start difference. First operand has 124 places, 187 transitions, 2392 flow. Second operand 9 states and 171 transitions. [2024-06-27 20:44:24,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 235 transitions, 3034 flow [2024-06-27 20:44:24,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 235 transitions, 2868 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-27 20:44:24,219 INFO L231 Difference]: Finished difference. Result has 129 places, 188 transitions, 2499 flow [2024-06-27 20:44:24,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2226, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2499, PETRI_PLACES=129, PETRI_TRANSITIONS=188} [2024-06-27 20:44:24,219 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 86 predicate places. [2024-06-27 20:44:24,219 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 188 transitions, 2499 flow [2024-06-27 20:44:24,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:24,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:44:24,220 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:44:24,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 20:44:24,220 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)] === [2024-06-27 20:44:24,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:44:24,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1624801812, now seen corresponding path program 6 times [2024-06-27 20:44:24,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:44:24,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548000140] [2024-06-27 20:44:24,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:44:24,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:44:24,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:44:26,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:44:26,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:44:26,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548000140] [2024-06-27 20:44:26,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548000140] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:44:26,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:44:26,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:44:26,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578204181] [2024-06-27 20:44:26,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:44:26,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:44:26,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:44:26,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:44:26,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:44:26,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:44:26,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 188 transitions, 2499 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:26,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:44:26,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:44:26,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:44:27,933 INFO L124 PetriNetUnfolderBase]: 2521/4175 cut-off events. [2024-06-27 20:44:27,934 INFO L125 PetriNetUnfolderBase]: For 82821/82841 co-relation queries the response was YES. [2024-06-27 20:44:27,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24124 conditions, 4175 events. 2521/4175 cut-off events. For 82821/82841 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 25138 event pairs, 569 based on Foata normal form. 38/4210 useless extension candidates. Maximal degree in co-relation 24065. Up to 2963 conditions per place. [2024-06-27 20:44:27,964 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 104 selfloop transitions, 125 changer transitions 0/234 dead transitions. [2024-06-27 20:44:27,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 234 transitions, 3139 flow [2024-06-27 20:44:27,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:44:27,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:44:27,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-27 20:44:27,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4732142857142857 [2024-06-27 20:44:27,966 INFO L175 Difference]: Start difference. First operand has 129 places, 188 transitions, 2499 flow. Second operand 8 states and 159 transitions. [2024-06-27 20:44:27,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 234 transitions, 3139 flow [2024-06-27 20:44:28,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 234 transitions, 2902 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-27 20:44:28,065 INFO L231 Difference]: Finished difference. Result has 130 places, 189 transitions, 2555 flow [2024-06-27 20:44:28,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2262, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2555, PETRI_PLACES=130, PETRI_TRANSITIONS=189} [2024-06-27 20:44:28,070 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 87 predicate places. [2024-06-27 20:44:28,070 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 189 transitions, 2555 flow [2024-06-27 20:44:28,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:28,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:44:28,070 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:44:28,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 20:44:28,071 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:44:28,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:44:28,071 INFO L85 PathProgramCache]: Analyzing trace with hash -249558585, now seen corresponding path program 1 times [2024-06-27 20:44:28,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:44:28,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272341656] [2024-06-27 20:44:28,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:44:28,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:44:28,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:44:29,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:44:29,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:44:29,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272341656] [2024-06-27 20:44:29,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272341656] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:44:29,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:44:29,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:44:29,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867014125] [2024-06-27 20:44:29,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:44:29,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:44:29,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:44:29,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:44:29,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:44:30,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:44:30,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 189 transitions, 2555 flow. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:30,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:44:30,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:44:30,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:44:30,956 INFO L124 PetriNetUnfolderBase]: 2387/3983 cut-off events. [2024-06-27 20:44:30,956 INFO L125 PetriNetUnfolderBase]: For 80993/81032 co-relation queries the response was YES. [2024-06-27 20:44:30,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23533 conditions, 3983 events. 2387/3983 cut-off events. For 80993/81032 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 24325 event pairs, 621 based on Foata normal form. 21/3964 useless extension candidates. Maximal degree in co-relation 23473. Up to 3582 conditions per place. [2024-06-27 20:44:30,987 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 177 selfloop transitions, 18 changer transitions 0/211 dead transitions. [2024-06-27 20:44:30,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 211 transitions, 3039 flow [2024-06-27 20:44:30,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:44:30,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:44:30,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2024-06-27 20:44:30,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43253968253968256 [2024-06-27 20:44:30,989 INFO L175 Difference]: Start difference. First operand has 130 places, 189 transitions, 2555 flow. Second operand 6 states and 109 transitions. [2024-06-27 20:44:30,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 211 transitions, 3039 flow [2024-06-27 20:44:31,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 211 transitions, 2782 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-27 20:44:31,092 INFO L231 Difference]: Finished difference. Result has 130 places, 192 transitions, 2376 flow [2024-06-27 20:44:31,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2298, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2376, PETRI_PLACES=130, PETRI_TRANSITIONS=192} [2024-06-27 20:44:31,094 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 87 predicate places. [2024-06-27 20:44:31,095 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 192 transitions, 2376 flow [2024-06-27 20:44:31,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:31,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:44:31,095 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:44:31,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 20:44:31,095 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)] === [2024-06-27 20:44:31,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:44:31,096 INFO L85 PathProgramCache]: Analyzing trace with hash -439165542, now seen corresponding path program 7 times [2024-06-27 20:44:31,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:44:31,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465876227] [2024-06-27 20:44:31,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:44:31,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:44:31,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:44:33,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:44:33,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:44:33,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465876227] [2024-06-27 20:44:33,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465876227] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:44:33,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:44:33,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:44:33,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259931510] [2024-06-27 20:44:33,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:44:33,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:44:33,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:44:33,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:44:33,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:44:33,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:44:33,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 192 transitions, 2376 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:33,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:44:33,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:44:33,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:44:35,575 INFO L124 PetriNetUnfolderBase]: 2614/4312 cut-off events. [2024-06-27 20:44:35,576 INFO L125 PetriNetUnfolderBase]: For 88317/88344 co-relation queries the response was YES. [2024-06-27 20:44:35,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24583 conditions, 4312 events. 2614/4312 cut-off events. For 88317/88344 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 25964 event pairs, 569 based on Foata normal form. 30/4337 useless extension candidates. Maximal degree in co-relation 24522. Up to 3136 conditions per place. [2024-06-27 20:44:35,609 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 117 selfloop transitions, 122 changer transitions 0/244 dead transitions. [2024-06-27 20:44:35,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 244 transitions, 3062 flow [2024-06-27 20:44:35,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:44:35,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:44:35,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-27 20:44:35,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-27 20:44:35,611 INFO L175 Difference]: Start difference. First operand has 130 places, 192 transitions, 2376 flow. Second operand 10 states and 185 transitions. [2024-06-27 20:44:35,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 244 transitions, 3062 flow [2024-06-27 20:44:35,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 244 transitions, 3010 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-27 20:44:35,719 INFO L231 Difference]: Finished difference. Result has 136 places, 193 transitions, 2611 flow [2024-06-27 20:44:35,720 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2324, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2611, PETRI_PLACES=136, PETRI_TRANSITIONS=193} [2024-06-27 20:44:35,720 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 93 predicate places. [2024-06-27 20:44:35,720 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 193 transitions, 2611 flow [2024-06-27 20:44:35,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:35,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:44:35,721 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:44:35,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 20:44:35,721 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)] === [2024-06-27 20:44:35,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:44:35,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1085833400, now seen corresponding path program 8 times [2024-06-27 20:44:35,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:44:35,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90935136] [2024-06-27 20:44:35,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:44:35,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:44:35,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:44:38,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:44:38,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:44:38,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90935136] [2024-06-27 20:44:38,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90935136] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:44:38,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:44:38,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:44:38,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115839582] [2024-06-27 20:44:38,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:44:38,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:44:38,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:44:38,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:44:38,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:44:38,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:44:38,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 193 transitions, 2611 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:38,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:44:38,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:44:38,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:44:39,875 INFO L124 PetriNetUnfolderBase]: 2578/4239 cut-off events. [2024-06-27 20:44:39,875 INFO L125 PetriNetUnfolderBase]: For 89630/89653 co-relation queries the response was YES. [2024-06-27 20:44:39,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24657 conditions, 4239 events. 2578/4239 cut-off events. For 89630/89653 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 25406 event pairs, 603 based on Foata normal form. 26/4260 useless extension candidates. Maximal degree in co-relation 24595. Up to 3080 conditions per place. [2024-06-27 20:44:39,907 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 112 selfloop transitions, 120 changer transitions 0/237 dead transitions. [2024-06-27 20:44:39,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 237 transitions, 3227 flow [2024-06-27 20:44:39,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:44:39,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:44:39,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-27 20:44:39,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-27 20:44:39,908 INFO L175 Difference]: Start difference. First operand has 136 places, 193 transitions, 2611 flow. Second operand 9 states and 169 transitions. [2024-06-27 20:44:39,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 237 transitions, 3227 flow [2024-06-27 20:44:40,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 237 transitions, 2962 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-27 20:44:40,027 INFO L231 Difference]: Finished difference. Result has 137 places, 193 transitions, 2597 flow [2024-06-27 20:44:40,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2346, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2597, PETRI_PLACES=137, PETRI_TRANSITIONS=193} [2024-06-27 20:44:40,028 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 94 predicate places. [2024-06-27 20:44:40,028 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 193 transitions, 2597 flow [2024-06-27 20:44:40,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:40,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:44:40,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:44:40,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 20:44:40,029 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)] === [2024-06-27 20:44:40,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:44:40,030 INFO L85 PathProgramCache]: Analyzing trace with hash -438950061, now seen corresponding path program 1 times [2024-06-27 20:44:40,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:44:40,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512719004] [2024-06-27 20:44:40,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:44:40,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:44:40,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:44:42,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:44:42,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:44:42,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512719004] [2024-06-27 20:44:42,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512719004] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:44:42,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:44:42,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:44:42,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311207005] [2024-06-27 20:44:42,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:44:42,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:44:42,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:44:42,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:44:42,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:44:42,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:44:42,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 193 transitions, 2597 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:42,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:44:42,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:44:42,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:44:44,293 INFO L124 PetriNetUnfolderBase]: 2620/4296 cut-off events. [2024-06-27 20:44:44,294 INFO L125 PetriNetUnfolderBase]: For 86393/86420 co-relation queries the response was YES. [2024-06-27 20:44:44,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24974 conditions, 4296 events. 2620/4296 cut-off events. For 86393/86420 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 25738 event pairs, 591 based on Foata normal form. 16/4307 useless extension candidates. Maximal degree in co-relation 24911. Up to 3270 conditions per place. [2024-06-27 20:44:44,327 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 103 selfloop transitions, 132 changer transitions 0/240 dead transitions. [2024-06-27 20:44:44,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 240 transitions, 3325 flow [2024-06-27 20:44:44,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:44:44,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:44:44,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-27 20:44:44,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-27 20:44:44,329 INFO L175 Difference]: Start difference. First operand has 137 places, 193 transitions, 2597 flow. Second operand 10 states and 175 transitions. [2024-06-27 20:44:44,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 240 transitions, 3325 flow [2024-06-27 20:44:44,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 240 transitions, 3029 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-27 20:44:44,449 INFO L231 Difference]: Finished difference. Result has 140 places, 202 transitions, 2720 flow [2024-06-27 20:44:44,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2313, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2720, PETRI_PLACES=140, PETRI_TRANSITIONS=202} [2024-06-27 20:44:44,450 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 97 predicate places. [2024-06-27 20:44:44,450 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 202 transitions, 2720 flow [2024-06-27 20:44:44,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:44,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:44:44,451 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:44:44,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 20:44:44,451 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:44:44,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:44:44,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1530117015, now seen corresponding path program 2 times [2024-06-27 20:44:44,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:44:44,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094197774] [2024-06-27 20:44:44,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:44:44,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:44:44,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:44:47,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:44:47,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:44:47,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094197774] [2024-06-27 20:44:47,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094197774] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:44:47,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:44:47,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:44:47,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044767525] [2024-06-27 20:44:47,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:44:47,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:44:47,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:44:47,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:44:47,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:44:47,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:44:47,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 202 transitions, 2720 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:47,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:44:47,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:44:47,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:44:49,177 INFO L124 PetriNetUnfolderBase]: 2640/4328 cut-off events. [2024-06-27 20:44:49,177 INFO L125 PetriNetUnfolderBase]: For 91167/91194 co-relation queries the response was YES. [2024-06-27 20:44:49,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25519 conditions, 4328 events. 2640/4328 cut-off events. For 91167/91194 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 25955 event pairs, 591 based on Foata normal form. 14/4337 useless extension candidates. Maximal degree in co-relation 25454. Up to 3302 conditions per place. [2024-06-27 20:44:49,207 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 107 selfloop transitions, 151 changer transitions 0/263 dead transitions. [2024-06-27 20:44:49,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 263 transitions, 3738 flow [2024-06-27 20:44:49,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:44:49,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:44:49,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-27 20:44:49,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-27 20:44:49,208 INFO L175 Difference]: Start difference. First operand has 140 places, 202 transitions, 2720 flow. Second operand 9 states and 164 transitions. [2024-06-27 20:44:49,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 263 transitions, 3738 flow [2024-06-27 20:44:49,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 263 transitions, 3496 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-27 20:44:49,338 INFO L231 Difference]: Finished difference. Result has 144 places, 225 transitions, 3196 flow [2024-06-27 20:44:49,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2510, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3196, PETRI_PLACES=144, PETRI_TRANSITIONS=225} [2024-06-27 20:44:49,338 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 101 predicate places. [2024-06-27 20:44:49,338 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 225 transitions, 3196 flow [2024-06-27 20:44:49,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:49,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:44:49,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:44:49,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 20:44:49,339 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:44:49,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:44:49,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1329027765, now seen corresponding path program 3 times [2024-06-27 20:44:49,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:44:49,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167044154] [2024-06-27 20:44:49,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:44:49,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:44:49,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:44:52,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:44:52,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:44:52,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167044154] [2024-06-27 20:44:52,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167044154] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:44:52,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:44:52,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:44:52,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044537843] [2024-06-27 20:44:52,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:44:52,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:44:52,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:44:52,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:44:52,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:44:52,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:44:52,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 225 transitions, 3196 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:52,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:44:52,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:44:52,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:44:53,885 INFO L124 PetriNetUnfolderBase]: 2632/4320 cut-off events. [2024-06-27 20:44:53,885 INFO L125 PetriNetUnfolderBase]: For 96958/96981 co-relation queries the response was YES. [2024-06-27 20:44:53,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26069 conditions, 4320 events. 2632/4320 cut-off events. For 96958/96981 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 25886 event pairs, 613 based on Foata normal form. 10/4325 useless extension candidates. Maximal degree in co-relation 26002. Up to 3290 conditions per place. [2024-06-27 20:44:53,917 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 111 selfloop transitions, 148 changer transitions 0/264 dead transitions. [2024-06-27 20:44:53,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 264 transitions, 3891 flow [2024-06-27 20:44:53,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:44:53,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:44:53,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-27 20:44:53,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-27 20:44:53,919 INFO L175 Difference]: Start difference. First operand has 144 places, 225 transitions, 3196 flow. Second operand 9 states and 164 transitions. [2024-06-27 20:44:53,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 264 transitions, 3891 flow [2024-06-27 20:44:54,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 264 transitions, 3622 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-27 20:44:54,048 INFO L231 Difference]: Finished difference. Result has 150 places, 228 transitions, 3300 flow [2024-06-27 20:44:54,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2929, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3300, PETRI_PLACES=150, PETRI_TRANSITIONS=228} [2024-06-27 20:44:54,048 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 107 predicate places. [2024-06-27 20:44:54,048 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 228 transitions, 3300 flow [2024-06-27 20:44:54,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:54,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:44:54,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:44:54,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 20:44:54,049 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:44:54,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:44:54,049 INFO L85 PathProgramCache]: Analyzing trace with hash -172926351, now seen corresponding path program 4 times [2024-06-27 20:44:54,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:44:54,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687237042] [2024-06-27 20:44:54,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:44:54,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:44:54,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:44:56,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:44:56,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:44:56,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687237042] [2024-06-27 20:44:56,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687237042] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:44:56,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:44:56,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:44:56,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776674398] [2024-06-27 20:44:56,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:44:56,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:44:56,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:44:56,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:44:56,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:44:56,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:44:56,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 228 transitions, 3300 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:56,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:44:56,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:44:56,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:44:58,133 INFO L124 PetriNetUnfolderBase]: 2672/4417 cut-off events. [2024-06-27 20:44:58,133 INFO L125 PetriNetUnfolderBase]: For 100519/100546 co-relation queries the response was YES. [2024-06-27 20:44:58,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26202 conditions, 4417 events. 2672/4417 cut-off events. For 100519/100546 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 26878 event pairs, 523 based on Foata normal form. 14/4426 useless extension candidates. Maximal degree in co-relation 26133. Up to 3084 conditions per place. [2024-06-27 20:44:58,171 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 107 selfloop transitions, 161 changer transitions 0/273 dead transitions. [2024-06-27 20:44:58,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 273 transitions, 4026 flow [2024-06-27 20:44:58,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:44:58,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:44:58,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-27 20:44:58,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-27 20:44:58,172 INFO L175 Difference]: Start difference. First operand has 150 places, 228 transitions, 3300 flow. Second operand 9 states and 168 transitions. [2024-06-27 20:44:58,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 273 transitions, 4026 flow [2024-06-27 20:44:58,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 273 transitions, 3692 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-27 20:44:58,300 INFO L231 Difference]: Finished difference. Result has 154 places, 231 transitions, 3376 flow [2024-06-27 20:44:58,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2966, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3376, PETRI_PLACES=154, PETRI_TRANSITIONS=231} [2024-06-27 20:44:58,300 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 111 predicate places. [2024-06-27 20:44:58,300 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 231 transitions, 3376 flow [2024-06-27 20:44:58,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:58,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:44:58,301 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:44:58,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 20:44:58,301 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)] === [2024-06-27 20:44:58,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:44:58,301 INFO L85 PathProgramCache]: Analyzing trace with hash 427756695, now seen corresponding path program 2 times [2024-06-27 20:44:58,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:44:58,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120918528] [2024-06-27 20:44:58,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:44:58,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:44:58,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:00,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:45:00,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:00,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120918528] [2024-06-27 20:45:00,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120918528] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:00,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:00,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:45:00,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114084211] [2024-06-27 20:45:00,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:00,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:45:00,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:00,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:45:00,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:45:00,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:45:00,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 231 transitions, 3376 flow. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:45:00,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:00,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:45:00,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:45:01,216 INFO L124 PetriNetUnfolderBase]: 2530/4224 cut-off events. [2024-06-27 20:45:01,216 INFO L125 PetriNetUnfolderBase]: For 105068/105126 co-relation queries the response was YES. [2024-06-27 20:45:01,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25645 conditions, 4224 events. 2530/4224 cut-off events. For 105068/105126 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 26266 event pairs, 593 based on Foata normal form. 38/4214 useless extension candidates. Maximal degree in co-relation 25574. Up to 3856 conditions per place. [2024-06-27 20:45:01,256 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 216 selfloop transitions, 12 changer transitions 0/244 dead transitions. [2024-06-27 20:45:01,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 244 transitions, 3900 flow [2024-06-27 20:45:01,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:45:01,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:45:01,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-27 20:45:01,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4007936507936508 [2024-06-27 20:45:01,262 INFO L175 Difference]: Start difference. First operand has 154 places, 231 transitions, 3376 flow. Second operand 6 states and 101 transitions. [2024-06-27 20:45:01,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 244 transitions, 3900 flow [2024-06-27 20:45:01,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 244 transitions, 3572 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-27 20:45:01,448 INFO L231 Difference]: Finished difference. Result has 154 places, 234 transitions, 3126 flow [2024-06-27 20:45:01,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3048, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3126, PETRI_PLACES=154, PETRI_TRANSITIONS=234} [2024-06-27 20:45:01,449 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 111 predicate places. [2024-06-27 20:45:01,449 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 234 transitions, 3126 flow [2024-06-27 20:45:01,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:45:01,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:45:01,449 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:45:01,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 20:45:01,449 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)] === [2024-06-27 20:45:01,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:45:01,450 INFO L85 PathProgramCache]: Analyzing trace with hash 442718907, now seen corresponding path program 1 times [2024-06-27 20:45:01,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:45:01,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079710111] [2024-06-27 20:45:01,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:45:01,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:45:01,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:02,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:45:02,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:02,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079710111] [2024-06-27 20:45:02,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079710111] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:02,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:02,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:45:02,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153052156] [2024-06-27 20:45:02,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:02,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:45:02,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:02,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:45:02,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:45:02,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:45:02,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 234 transitions, 3126 flow. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:45:02,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:02,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:45:02,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:45:03,779 INFO L124 PetriNetUnfolderBase]: 2674/4487 cut-off events. [2024-06-27 20:45:03,780 INFO L125 PetriNetUnfolderBase]: For 104547/104549 co-relation queries the response was YES. [2024-06-27 20:45:03,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26043 conditions, 4487 events. 2674/4487 cut-off events. For 104547/104549 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 27895 event pairs, 682 based on Foata normal form. 1/4486 useless extension candidates. Maximal degree in co-relation 25971. Up to 4136 conditions per place. [2024-06-27 20:45:03,811 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 234 selfloop transitions, 12 changer transitions 0/251 dead transitions. [2024-06-27 20:45:03,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 251 transitions, 3686 flow [2024-06-27 20:45:03,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:45:03,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:45:03,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 100 transitions. [2024-06-27 20:45:03,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-27 20:45:03,813 INFO L175 Difference]: Start difference. First operand has 154 places, 234 transitions, 3126 flow. Second operand 6 states and 100 transitions. [2024-06-27 20:45:03,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 251 transitions, 3686 flow [2024-06-27 20:45:03,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 251 transitions, 3630 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-27 20:45:03,972 INFO L231 Difference]: Finished difference. Result has 156 places, 237 transitions, 3136 flow [2024-06-27 20:45:03,972 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3070, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3136, PETRI_PLACES=156, PETRI_TRANSITIONS=237} [2024-06-27 20:45:03,973 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 113 predicate places. [2024-06-27 20:45:03,973 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 237 transitions, 3136 flow [2024-06-27 20:45:03,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:45:03,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:45:03,973 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:45:03,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 20:45:03,973 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)] === [2024-06-27 20:45:03,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:45:03,974 INFO L85 PathProgramCache]: Analyzing trace with hash -237172473, now seen corresponding path program 2 times [2024-06-27 20:45:03,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:45:03,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132809790] [2024-06-27 20:45:03,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:45:03,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:45:03,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:05,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:45:05,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:05,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132809790] [2024-06-27 20:45:05,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132809790] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:05,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:05,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:45:05,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116798099] [2024-06-27 20:45:05,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:05,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:45:05,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:05,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:45:05,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:45:05,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:45:05,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 237 transitions, 3136 flow. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:45:05,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:05,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:45:05,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:45:06,127 INFO L124 PetriNetUnfolderBase]: 2671/4484 cut-off events. [2024-06-27 20:45:06,127 INFO L125 PetriNetUnfolderBase]: For 108015/108019 co-relation queries the response was YES. [2024-06-27 20:45:06,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26305 conditions, 4484 events. 2671/4484 cut-off events. For 108015/108019 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 27899 event pairs, 687 based on Foata normal form. 3/4485 useless extension candidates. Maximal degree in co-relation 26232. Up to 4126 conditions per place. [2024-06-27 20:45:06,162 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 228 selfloop transitions, 17 changer transitions 0/250 dead transitions. [2024-06-27 20:45:06,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 250 transitions, 3688 flow [2024-06-27 20:45:06,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:45:06,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:45:06,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 98 transitions. [2024-06-27 20:45:06,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-27 20:45:06,163 INFO L175 Difference]: Start difference. First operand has 156 places, 237 transitions, 3136 flow. Second operand 6 states and 98 transitions. [2024-06-27 20:45:06,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 250 transitions, 3688 flow [2024-06-27 20:45:06,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 250 transitions, 3644 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-27 20:45:06,337 INFO L231 Difference]: Finished difference. Result has 158 places, 240 transitions, 3174 flow [2024-06-27 20:45:06,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3092, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3174, PETRI_PLACES=158, PETRI_TRANSITIONS=240} [2024-06-27 20:45:06,338 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 115 predicate places. [2024-06-27 20:45:06,338 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 240 transitions, 3174 flow [2024-06-27 20:45:06,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:45:06,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:45:06,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:45:06,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 20:45:06,339 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)] === [2024-06-27 20:45:06,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:45:06,339 INFO L85 PathProgramCache]: Analyzing trace with hash 427771575, now seen corresponding path program 1 times [2024-06-27 20:45:06,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:45:06,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077920501] [2024-06-27 20:45:06,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:45:06,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:45:06,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:08,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:45:08,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:08,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077920501] [2024-06-27 20:45:08,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077920501] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:08,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:08,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:45:08,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262904914] [2024-06-27 20:45:08,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:08,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:45:08,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:08,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:45:08,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:45:08,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:45:08,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 240 transitions, 3174 flow. Second operand has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:45:08,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:08,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:45:08,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:45:09,086 INFO L124 PetriNetUnfolderBase]: 2532/4255 cut-off events. [2024-06-27 20:45:09,086 INFO L125 PetriNetUnfolderBase]: For 113976/114034 co-relation queries the response was YES. [2024-06-27 20:45:09,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25560 conditions, 4255 events. 2532/4255 cut-off events. For 113976/114034 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 26679 event pairs, 623 based on Foata normal form. 39/4246 useless extension candidates. Maximal degree in co-relation 25486. Up to 3845 conditions per place. [2024-06-27 20:45:09,121 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 222 selfloop transitions, 14 changer transitions 0/254 dead transitions. [2024-06-27 20:45:09,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 254 transitions, 3712 flow [2024-06-27 20:45:09,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:45:09,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:45:09,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-27 20:45:09,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3877551020408163 [2024-06-27 20:45:09,123 INFO L175 Difference]: Start difference. First operand has 158 places, 240 transitions, 3174 flow. Second operand 7 states and 114 transitions. [2024-06-27 20:45:09,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 254 transitions, 3712 flow [2024-06-27 20:45:09,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 254 transitions, 3652 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-27 20:45:09,265 INFO L231 Difference]: Finished difference. Result has 161 places, 242 transitions, 3187 flow [2024-06-27 20:45:09,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3114, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3187, PETRI_PLACES=161, PETRI_TRANSITIONS=242} [2024-06-27 20:45:09,266 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 118 predicate places. [2024-06-27 20:45:09,266 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 242 transitions, 3187 flow [2024-06-27 20:45:09,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:45:09,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:45:09,266 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:45:09,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 20:45:09,266 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)] === [2024-06-27 20:45:09,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:45:09,267 INFO L85 PathProgramCache]: Analyzing trace with hash 853291470, now seen corresponding path program 1 times [2024-06-27 20:45:09,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:45:09,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256003655] [2024-06-27 20:45:09,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:45:09,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:45:09,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:11,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:45:11,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:11,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256003655] [2024-06-27 20:45:11,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256003655] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:11,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:11,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:45:11,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617123166] [2024-06-27 20:45:11,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:11,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:45:11,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:11,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:45:11,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:45:11,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:45:11,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 242 transitions, 3187 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:45:11,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:11,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:45:11,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:45:12,490 INFO L124 PetriNetUnfolderBase]: 2763/4623 cut-off events. [2024-06-27 20:45:12,491 INFO L125 PetriNetUnfolderBase]: For 124714/124751 co-relation queries the response was YES. [2024-06-27 20:45:12,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27974 conditions, 4623 events. 2763/4623 cut-off events. For 124714/124751 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 28863 event pairs, 559 based on Foata normal form. 39/4660 useless extension candidates. Maximal degree in co-relation 27899. Up to 3944 conditions per place. [2024-06-27 20:45:12,534 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 217 selfloop transitions, 68 changer transitions 0/290 dead transitions. [2024-06-27 20:45:12,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 290 transitions, 4198 flow [2024-06-27 20:45:12,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:45:12,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:45:12,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-27 20:45:12,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-27 20:45:12,536 INFO L175 Difference]: Start difference. First operand has 161 places, 242 transitions, 3187 flow. Second operand 9 states and 161 transitions. [2024-06-27 20:45:12,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 290 transitions, 4198 flow [2024-06-27 20:45:12,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 290 transitions, 4141 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-27 20:45:12,763 INFO L231 Difference]: Finished difference. Result has 167 places, 255 transitions, 3473 flow [2024-06-27 20:45:12,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3130, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3473, PETRI_PLACES=167, PETRI_TRANSITIONS=255} [2024-06-27 20:45:12,773 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 124 predicate places. [2024-06-27 20:45:12,773 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 255 transitions, 3473 flow [2024-06-27 20:45:12,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:45:12,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:45:12,773 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:45:12,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 20:45:12,774 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:45:12,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:45:12,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1343666794, now seen corresponding path program 1 times [2024-06-27 20:45:12,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:45:12,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962024980] [2024-06-27 20:45:12,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:45:12,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:45:12,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:16,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:45:16,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:16,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962024980] [2024-06-27 20:45:16,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962024980] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:16,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:16,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:45:16,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955197447] [2024-06-27 20:45:16,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:16,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:45:16,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:16,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:45:16,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:45:16,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:45:16,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 255 transitions, 3473 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:45:16,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:16,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:45:16,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:45:18,072 INFO L124 PetriNetUnfolderBase]: 2859/4769 cut-off events. [2024-06-27 20:45:18,072 INFO L125 PetriNetUnfolderBase]: For 140733/140741 co-relation queries the response was YES. [2024-06-27 20:45:18,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29818 conditions, 4769 events. 2859/4769 cut-off events. For 140733/140741 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 29770 event pairs, 595 based on Foata normal form. 16/4782 useless extension candidates. Maximal degree in co-relation 29740. Up to 3285 conditions per place. [2024-06-27 20:45:18,122 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 176 selfloop transitions, 149 changer transitions 0/330 dead transitions. [2024-06-27 20:45:18,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 330 transitions, 4516 flow [2024-06-27 20:45:18,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:45:18,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:45:18,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 219 transitions. [2024-06-27 20:45:18,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-27 20:45:18,124 INFO L175 Difference]: Start difference. First operand has 167 places, 255 transitions, 3473 flow. Second operand 12 states and 219 transitions. [2024-06-27 20:45:18,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 330 transitions, 4516 flow [2024-06-27 20:45:18,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 330 transitions, 4380 flow, removed 32 selfloop flow, removed 4 redundant places. [2024-06-27 20:45:18,362 INFO L231 Difference]: Finished difference. Result has 177 places, 266 transitions, 3852 flow [2024-06-27 20:45:18,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3337, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3852, PETRI_PLACES=177, PETRI_TRANSITIONS=266} [2024-06-27 20:45:18,363 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 134 predicate places. [2024-06-27 20:45:18,363 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 266 transitions, 3852 flow [2024-06-27 20:45:18,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:45:18,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:45:18,363 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:45:18,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 20:45:18,363 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)] === [2024-06-27 20:45:18,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:45:18,364 INFO L85 PathProgramCache]: Analyzing trace with hash 667431880, now seen corresponding path program 2 times [2024-06-27 20:45:18,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:45:18,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662641508] [2024-06-27 20:45:18,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:45:18,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:45:18,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:20,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:45:20,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:20,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662641508] [2024-06-27 20:45:20,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662641508] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:20,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:20,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:45:20,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331332421] [2024-06-27 20:45:20,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:20,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:45:20,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:20,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:45:20,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:45:20,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:45:20,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 266 transitions, 3852 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:45:20,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:20,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:45:20,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:45:22,392 INFO L124 PetriNetUnfolderBase]: 3022/5034 cut-off events. [2024-06-27 20:45:22,392 INFO L125 PetriNetUnfolderBase]: For 164581/164599 co-relation queries the response was YES. [2024-06-27 20:45:22,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33269 conditions, 5034 events. 3022/5034 cut-off events. For 164581/164599 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 31748 event pairs, 564 based on Foata normal form. 18/5050 useless extension candidates. Maximal degree in co-relation 33187. Up to 3844 conditions per place. [2024-06-27 20:45:22,440 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 169 selfloop transitions, 134 changer transitions 0/308 dead transitions. [2024-06-27 20:45:22,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 308 transitions, 4938 flow [2024-06-27 20:45:22,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:45:22,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:45:22,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-27 20:45:22,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-27 20:45:22,442 INFO L175 Difference]: Start difference. First operand has 177 places, 266 transitions, 3852 flow. Second operand 8 states and 143 transitions. [2024-06-27 20:45:22,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 308 transitions, 4938 flow [2024-06-27 20:45:22,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 308 transitions, 4584 flow, removed 18 selfloop flow, removed 10 redundant places. [2024-06-27 20:45:22,716 INFO L231 Difference]: Finished difference. Result has 177 places, 282 transitions, 4116 flow [2024-06-27 20:45:22,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3498, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4116, PETRI_PLACES=177, PETRI_TRANSITIONS=282} [2024-06-27 20:45:22,717 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 134 predicate places. [2024-06-27 20:45:22,717 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 282 transitions, 4116 flow [2024-06-27 20:45:22,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:45:22,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:45:22,717 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:45:22,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 20:45:22,717 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)] === [2024-06-27 20:45:22,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:45:22,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1224518113, now seen corresponding path program 1 times [2024-06-27 20:45:22,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:45:22,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987650740] [2024-06-27 20:45:22,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:45:22,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:45:22,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:25,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:45:25,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:25,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987650740] [2024-06-27 20:45:25,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987650740] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:25,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:25,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:45:25,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954548074] [2024-06-27 20:45:25,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:25,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:45:25,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:25,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:45:25,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:45:25,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:45:25,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 282 transitions, 4116 flow. Second operand has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:45:25,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:25,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:45:25,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:45:26,438 INFO L124 PetriNetUnfolderBase]: 2885/4841 cut-off events. [2024-06-27 20:45:26,438 INFO L125 PetriNetUnfolderBase]: For 174855/174907 co-relation queries the response was YES. [2024-06-27 20:45:26,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33321 conditions, 4841 events. 2885/4841 cut-off events. For 174855/174907 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 30926 event pairs, 627 based on Foata normal form. 34/4835 useless extension candidates. Maximal degree in co-relation 33238. Up to 4325 conditions per place. [2024-06-27 20:45:26,480 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 259 selfloop transitions, 21 changer transitions 0/305 dead transitions. [2024-06-27 20:45:26,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 305 transitions, 4797 flow [2024-06-27 20:45:26,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:45:26,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:45:26,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-27 20:45:26,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41496598639455784 [2024-06-27 20:45:26,482 INFO L175 Difference]: Start difference. First operand has 177 places, 282 transitions, 4116 flow. Second operand 7 states and 122 transitions. [2024-06-27 20:45:26,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 305 transitions, 4797 flow [2024-06-27 20:45:26,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 305 transitions, 4701 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-27 20:45:26,759 INFO L231 Difference]: Finished difference. Result has 181 places, 285 transitions, 4126 flow [2024-06-27 20:45:26,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4020, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4126, PETRI_PLACES=181, PETRI_TRANSITIONS=285} [2024-06-27 20:45:26,760 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 138 predicate places. [2024-06-27 20:45:26,760 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 285 transitions, 4126 flow [2024-06-27 20:45:26,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:45:26,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:45:26,760 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:45:26,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 20:45:26,761 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:45:26,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:45:26,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1609084616, now seen corresponding path program 2 times [2024-06-27 20:45:26,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:45:26,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313723747] [2024-06-27 20:45:26,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:45:26,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:45:26,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:29,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:45:29,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:29,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313723747] [2024-06-27 20:45:29,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313723747] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:29,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:29,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:45:29,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493950717] [2024-06-27 20:45:29,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:29,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:45:29,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:29,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:45:29,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:45:29,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:45:29,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 285 transitions, 4126 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:45:29,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:29,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:45:29,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:45:31,798 INFO L124 PetriNetUnfolderBase]: 3123/5194 cut-off events. [2024-06-27 20:45:31,798 INFO L125 PetriNetUnfolderBase]: For 189210/189227 co-relation queries the response was YES. [2024-06-27 20:45:31,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35335 conditions, 5194 events. 3123/5194 cut-off events. For 189210/189227 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 32740 event pairs, 698 based on Foata normal form. 16/5205 useless extension candidates. Maximal degree in co-relation 35250. Up to 3859 conditions per place. [2024-06-27 20:45:31,849 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 181 selfloop transitions, 165 changer transitions 0/351 dead transitions. [2024-06-27 20:45:31,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 351 transitions, 5191 flow [2024-06-27 20:45:31,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:45:31,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:45:31,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 216 transitions. [2024-06-27 20:45:31,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 20:45:31,851 INFO L175 Difference]: Start difference. First operand has 181 places, 285 transitions, 4126 flow. Second operand 12 states and 216 transitions. [2024-06-27 20:45:31,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 351 transitions, 5191 flow [2024-06-27 20:45:32,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 351 transitions, 5107 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-27 20:45:32,171 INFO L231 Difference]: Finished difference. Result has 190 places, 294 transitions, 4567 flow [2024-06-27 20:45:32,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4042, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4567, PETRI_PLACES=190, PETRI_TRANSITIONS=294} [2024-06-27 20:45:32,172 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 147 predicate places. [2024-06-27 20:45:32,172 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 294 transitions, 4567 flow [2024-06-27 20:45:32,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:45:32,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:45:32,172 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:45:32,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 20:45:32,173 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:45:32,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:45:32,174 INFO L85 PathProgramCache]: Analyzing trace with hash -2048063370, now seen corresponding path program 3 times [2024-06-27 20:45:32,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:45:32,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227193030] [2024-06-27 20:45:32,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:45:32,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:45:32,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:35,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:45:35,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:35,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227193030] [2024-06-27 20:45:35,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227193030] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:35,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:35,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:45:35,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416162715] [2024-06-27 20:45:35,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:35,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:45:35,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:35,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:45:35,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:45:35,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:45:35,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 294 transitions, 4567 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:45:35,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:35,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:45:35,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:45:37,874 INFO L124 PetriNetUnfolderBase]: 3270/5483 cut-off events. [2024-06-27 20:45:37,875 INFO L125 PetriNetUnfolderBase]: For 203896/203917 co-relation queries the response was YES. [2024-06-27 20:45:37,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37856 conditions, 5483 events. 3270/5483 cut-off events. For 203896/203917 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 35461 event pairs, 672 based on Foata normal form. 20/5498 useless extension candidates. Maximal degree in co-relation 37768. Up to 4093 conditions per place. [2024-06-27 20:45:37,931 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 187 selfloop transitions, 186 changer transitions 0/378 dead transitions. [2024-06-27 20:45:37,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 378 transitions, 5900 flow [2024-06-27 20:45:37,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 20:45:37,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 20:45:37,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 232 transitions. [2024-06-27 20:45:37,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4249084249084249 [2024-06-27 20:45:37,933 INFO L175 Difference]: Start difference. First operand has 190 places, 294 transitions, 4567 flow. Second operand 13 states and 232 transitions. [2024-06-27 20:45:37,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 378 transitions, 5900 flow [2024-06-27 20:45:38,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 378 transitions, 5519 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-27 20:45:38,389 INFO L231 Difference]: Finished difference. Result has 197 places, 312 transitions, 4953 flow [2024-06-27 20:45:38,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4216, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4953, PETRI_PLACES=197, PETRI_TRANSITIONS=312} [2024-06-27 20:45:38,391 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 154 predicate places. [2024-06-27 20:45:38,391 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 312 transitions, 4953 flow [2024-06-27 20:45:38,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:45:38,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:45:38,391 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:45:38,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 20:45:38,391 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:45:38,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:45:38,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1065747862, now seen corresponding path program 4 times [2024-06-27 20:45:38,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:45:38,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261197840] [2024-06-27 20:45:38,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:45:38,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:45:38,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:41,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:45:41,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:41,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261197840] [2024-06-27 20:45:41,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261197840] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:41,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:41,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:45:41,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921385058] [2024-06-27 20:45:41,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:41,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:45:41,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:41,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:45:41,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:45:41,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:45:41,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 312 transitions, 4953 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:45:41,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:41,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:45:41,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:45:44,295 INFO L124 PetriNetUnfolderBase]: 3298/5550 cut-off events. [2024-06-27 20:45:44,296 INFO L125 PetriNetUnfolderBase]: For 202088/202109 co-relation queries the response was YES. [2024-06-27 20:45:44,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38087 conditions, 5550 events. 3298/5550 cut-off events. For 202088/202109 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 36030 event pairs, 634 based on Foata normal form. 20/5565 useless extension candidates. Maximal degree in co-relation 37996. Up to 3109 conditions per place. [2024-06-27 20:45:44,346 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 173 selfloop transitions, 198 changer transitions 0/376 dead transitions. [2024-06-27 20:45:44,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 376 transitions, 6031 flow [2024-06-27 20:45:44,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:45:44,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:45:44,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 218 transitions. [2024-06-27 20:45:44,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43253968253968256 [2024-06-27 20:45:44,348 INFO L175 Difference]: Start difference. First operand has 197 places, 312 transitions, 4953 flow. Second operand 12 states and 218 transitions. [2024-06-27 20:45:44,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 376 transitions, 6031 flow [2024-06-27 20:45:44,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 376 transitions, 5711 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-27 20:45:44,730 INFO L231 Difference]: Finished difference. Result has 203 places, 313 transitions, 5114 flow [2024-06-27 20:45:44,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4637, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5114, PETRI_PLACES=203, PETRI_TRANSITIONS=313} [2024-06-27 20:45:44,731 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 160 predicate places. [2024-06-27 20:45:44,731 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 313 transitions, 5114 flow [2024-06-27 20:45:44,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:45:44,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:45:44,731 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:45:44,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 20:45:44,731 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:45:44,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:45:44,732 INFO L85 PathProgramCache]: Analyzing trace with hash -722548280, now seen corresponding path program 5 times [2024-06-27 20:45:44,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:45:44,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320654714] [2024-06-27 20:45:44,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:45:44,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:45:44,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:47,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:45:47,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:47,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320654714] [2024-06-27 20:45:47,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320654714] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:47,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:47,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:45:47,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994336900] [2024-06-27 20:45:47,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:47,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:45:47,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:47,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:45:47,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:45:47,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:45:47,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 313 transitions, 5114 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:45:47,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:47,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:45:47,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:45:50,253 INFO L124 PetriNetUnfolderBase]: 3278/5512 cut-off events. [2024-06-27 20:45:50,253 INFO L125 PetriNetUnfolderBase]: For 199361/199382 co-relation queries the response was YES. [2024-06-27 20:45:50,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37508 conditions, 5512 events. 3278/5512 cut-off events. For 199361/199382 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 35774 event pairs, 666 based on Foata normal form. 20/5527 useless extension candidates. Maximal degree in co-relation 37415. Up to 4113 conditions per place. [2024-06-27 20:45:50,314 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 189 selfloop transitions, 182 changer transitions 0/376 dead transitions. [2024-06-27 20:45:50,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 376 transitions, 6020 flow [2024-06-27 20:45:50,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 20:45:50,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 20:45:50,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 233 transitions. [2024-06-27 20:45:50,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4267399267399267 [2024-06-27 20:45:50,316 INFO L175 Difference]: Start difference. First operand has 203 places, 313 transitions, 5114 flow. Second operand 13 states and 233 transitions. [2024-06-27 20:45:50,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 376 transitions, 6020 flow [2024-06-27 20:45:50,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 376 transitions, 5447 flow, removed 15 selfloop flow, removed 11 redundant places. [2024-06-27 20:45:50,800 INFO L231 Difference]: Finished difference. Result has 204 places, 312 transitions, 4837 flow [2024-06-27 20:45:50,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4469, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4837, PETRI_PLACES=204, PETRI_TRANSITIONS=312} [2024-06-27 20:45:50,801 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 161 predicate places. [2024-06-27 20:45:50,801 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 312 transitions, 4837 flow [2024-06-27 20:45:50,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:45:50,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:45:50,801 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:45:50,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 20:45:50,801 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)] === [2024-06-27 20:45:50,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:45:50,802 INFO L85 PathProgramCache]: Analyzing trace with hash 375556960, now seen corresponding path program 3 times [2024-06-27 20:45:50,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:45:50,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416474334] [2024-06-27 20:45:50,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:45:50,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:45:50,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:53,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:45:53,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:53,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416474334] [2024-06-27 20:45:53,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416474334] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:53,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:53,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:45:53,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938310389] [2024-06-27 20:45:53,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:53,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:45:53,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:53,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:45:53,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:45:53,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:45:53,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 312 transitions, 4837 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:45:53,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:53,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:45:53,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:45:54,529 INFO L124 PetriNetUnfolderBase]: 3282/5533 cut-off events. [2024-06-27 20:45:54,529 INFO L125 PetriNetUnfolderBase]: For 194352/194356 co-relation queries the response was YES. [2024-06-27 20:45:54,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36683 conditions, 5533 events. 3282/5533 cut-off events. For 194352/194356 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 36170 event pairs, 779 based on Foata normal form. 4/5535 useless extension candidates. Maximal degree in co-relation 36591. Up to 5085 conditions per place. [2024-06-27 20:45:54,577 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 301 selfloop transitions, 26 changer transitions 0/332 dead transitions. [2024-06-27 20:45:54,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 332 transitions, 5749 flow [2024-06-27 20:45:54,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:45:54,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:45:54,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-27 20:45:54,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3843537414965986 [2024-06-27 20:45:54,578 INFO L175 Difference]: Start difference. First operand has 204 places, 312 transitions, 4837 flow. Second operand 7 states and 113 transitions. [2024-06-27 20:45:54,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 332 transitions, 5749 flow [2024-06-27 20:45:54,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 332 transitions, 5055 flow, removed 12 selfloop flow, removed 16 redundant places. [2024-06-27 20:45:54,989 INFO L231 Difference]: Finished difference. Result has 196 places, 320 transitions, 4359 flow [2024-06-27 20:45:54,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4143, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4359, PETRI_PLACES=196, PETRI_TRANSITIONS=320} [2024-06-27 20:45:54,990 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 153 predicate places. [2024-06-27 20:45:54,990 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 320 transitions, 4359 flow [2024-06-27 20:45:54,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:45:54,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:45:54,991 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:45:54,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 20:45:54,991 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)] === [2024-06-27 20:45:54,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:45:54,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1237405123, now seen corresponding path program 2 times [2024-06-27 20:45:54,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:45:54,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670128334] [2024-06-27 20:45:54,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:45:54,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:45:55,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:57,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:45:57,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:57,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670128334] [2024-06-27 20:45:57,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670128334] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:57,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:57,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:45:57,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244920353] [2024-06-27 20:45:57,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:57,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:45:57,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:57,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:45:57,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:45:57,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:45:57,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 320 transitions, 4359 flow. Second operand has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:45:57,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:57,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:45:57,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:45:59,127 INFO L124 PetriNetUnfolderBase]: 3147/5315 cut-off events. [2024-06-27 20:45:59,127 INFO L125 PetriNetUnfolderBase]: For 197736/197791 co-relation queries the response was YES. [2024-06-27 20:45:59,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34084 conditions, 5315 events. 3147/5315 cut-off events. For 197736/197791 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 34985 event pairs, 718 based on Foata normal form. 35/5302 useless extension candidates. Maximal degree in co-relation 33994. Up to 4798 conditions per place. [2024-06-27 20:45:59,182 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 292 selfloop transitions, 15 changer transitions 0/334 dead transitions. [2024-06-27 20:45:59,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 334 transitions, 5063 flow [2024-06-27 20:45:59,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:45:59,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:45:59,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-27 20:45:59,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3843537414965986 [2024-06-27 20:45:59,184 INFO L175 Difference]: Start difference. First operand has 196 places, 320 transitions, 4359 flow. Second operand 7 states and 113 transitions. [2024-06-27 20:45:59,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 334 transitions, 5063 flow [2024-06-27 20:45:59,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 334 transitions, 4960 flow, removed 42 selfloop flow, removed 3 redundant places. [2024-06-27 20:45:59,580 INFO L231 Difference]: Finished difference. Result has 200 places, 323 transitions, 4360 flow [2024-06-27 20:45:59,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4256, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4360, PETRI_PLACES=200, PETRI_TRANSITIONS=323} [2024-06-27 20:45:59,581 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 157 predicate places. [2024-06-27 20:45:59,581 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 323 transitions, 4360 flow [2024-06-27 20:45:59,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:45:59,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:45:59,581 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:45:59,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 20:45:59,582 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)] === [2024-06-27 20:45:59,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:45:59,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1237850593, now seen corresponding path program 3 times [2024-06-27 20:45:59,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:45:59,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651988279] [2024-06-27 20:45:59,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:45:59,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:45:59,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:46:01,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:46:01,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:46:01,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651988279] [2024-06-27 20:46:01,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651988279] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:46:01,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:46:01,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:46:01,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519498996] [2024-06-27 20:46:01,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:46:01,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:46:01,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:46:01,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:46:01,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:46:01,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:46:01,870 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 323 transitions, 4360 flow. Second operand has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:46:01,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:46:01,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:46:01,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:46:03,240 INFO L124 PetriNetUnfolderBase]: 3144/5347 cut-off events. [2024-06-27 20:46:03,240 INFO L125 PetriNetUnfolderBase]: For 202062/202116 co-relation queries the response was YES. [2024-06-27 20:46:03,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34405 conditions, 5347 events. 3144/5347 cut-off events. For 202062/202116 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 35429 event pairs, 657 based on Foata normal form. 33/5344 useless extension candidates. Maximal degree in co-relation 34313. Up to 4755 conditions per place. [2024-06-27 20:46:03,293 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 284 selfloop transitions, 28 changer transitions 0/339 dead transitions. [2024-06-27 20:46:03,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 339 transitions, 5101 flow [2024-06-27 20:46:03,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:46:03,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:46:03,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-27 20:46:03,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-27 20:46:03,295 INFO L175 Difference]: Start difference. First operand has 200 places, 323 transitions, 4360 flow. Second operand 7 states and 116 transitions. [2024-06-27 20:46:03,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 339 transitions, 5101 flow [2024-06-27 20:46:03,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 339 transitions, 5019 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-27 20:46:03,884 INFO L231 Difference]: Finished difference. Result has 202 places, 326 transitions, 4414 flow [2024-06-27 20:46:03,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4278, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4414, PETRI_PLACES=202, PETRI_TRANSITIONS=326} [2024-06-27 20:46:03,885 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 159 predicate places. [2024-06-27 20:46:03,885 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 326 transitions, 4414 flow [2024-06-27 20:46:03,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:46:03,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:46:03,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:46:03,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 20:46:03,886 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)] === [2024-06-27 20:46:03,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:46:03,887 INFO L85 PathProgramCache]: Analyzing trace with hash 368384428, now seen corresponding path program 1 times [2024-06-27 20:46:03,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:46:03,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076493984] [2024-06-27 20:46:03,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:46:03,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:46:03,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:46:05,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:46:05,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:46:05,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076493984] [2024-06-27 20:46:05,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076493984] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:46:05,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:46:05,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:46:05,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781846504] [2024-06-27 20:46:05,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:46:05,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:46:05,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:46:05,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:46:05,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:46:05,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:46:05,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 326 transitions, 4414 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:46:05,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:46:05,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:46:05,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:46:06,964 INFO L124 PetriNetUnfolderBase]: 3286/5545 cut-off events. [2024-06-27 20:46:06,964 INFO L125 PetriNetUnfolderBase]: For 206919/206921 co-relation queries the response was YES. [2024-06-27 20:46:06,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35670 conditions, 5545 events. 3286/5545 cut-off events. For 206919/206921 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 36260 event pairs, 777 based on Foata normal form. 2/5545 useless extension candidates. Maximal degree in co-relation 35577. Up to 5105 conditions per place. [2024-06-27 20:46:07,019 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 329 selfloop transitions, 17 changer transitions 0/351 dead transitions. [2024-06-27 20:46:07,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 351 transitions, 5248 flow [2024-06-27 20:46:07,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:46:07,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:46:07,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-27 20:46:07,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-27 20:46:07,021 INFO L175 Difference]: Start difference. First operand has 202 places, 326 transitions, 4414 flow. Second operand 7 states and 116 transitions. [2024-06-27 20:46:07,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 351 transitions, 5248 flow [2024-06-27 20:46:07,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 351 transitions, 5134 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-27 20:46:07,392 INFO L231 Difference]: Finished difference. Result has 204 places, 331 transitions, 4436 flow [2024-06-27 20:46:07,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4300, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4436, PETRI_PLACES=204, PETRI_TRANSITIONS=331} [2024-06-27 20:46:07,393 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 161 predicate places. [2024-06-27 20:46:07,393 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 331 transitions, 4436 flow [2024-06-27 20:46:07,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:46:07,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:46:07,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:46:07,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 20:46:07,394 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)] === [2024-06-27 20:46:07,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:46:07,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1620228290, now seen corresponding path program 2 times [2024-06-27 20:46:07,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:46:07,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488575605] [2024-06-27 20:46:07,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:46:07,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:46:07,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:46:08,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:46:08,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:46:08,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488575605] [2024-06-27 20:46:08,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488575605] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:46:08,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:46:08,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:46:08,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514730236] [2024-06-27 20:46:08,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:46:08,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:46:08,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:46:08,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:46:08,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:46:09,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:46:09,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 331 transitions, 4436 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:46:09,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:46:09,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:46:09,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:46:10,360 INFO L124 PetriNetUnfolderBase]: 3296/5561 cut-off events. [2024-06-27 20:46:10,361 INFO L125 PetriNetUnfolderBase]: For 214459/214461 co-relation queries the response was YES. [2024-06-27 20:46:10,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36292 conditions, 5561 events. 3296/5561 cut-off events. For 214459/214461 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 36349 event pairs, 777 based on Foata normal form. 2/5561 useless extension candidates. Maximal degree in co-relation 36198. Up to 5110 conditions per place. [2024-06-27 20:46:10,426 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 324 selfloop transitions, 22 changer transitions 0/351 dead transitions. [2024-06-27 20:46:10,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 351 transitions, 5240 flow [2024-06-27 20:46:10,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:46:10,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:46:10,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-27 20:46:10,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.391156462585034 [2024-06-27 20:46:10,428 INFO L175 Difference]: Start difference. First operand has 204 places, 331 transitions, 4436 flow. Second operand 7 states and 115 transitions. [2024-06-27 20:46:10,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 351 transitions, 5240 flow [2024-06-27 20:46:10,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 351 transitions, 5148 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-27 20:46:10,864 INFO L231 Difference]: Finished difference. Result has 206 places, 334 transitions, 4454 flow [2024-06-27 20:46:10,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4344, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4454, PETRI_PLACES=206, PETRI_TRANSITIONS=334} [2024-06-27 20:46:10,865 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 163 predicate places. [2024-06-27 20:46:10,865 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 334 transitions, 4454 flow [2024-06-27 20:46:10,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:46:10,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:46:10,865 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:46:10,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 20:46:10,865 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)] === [2024-06-27 20:46:10,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:46:10,866 INFO L85 PathProgramCache]: Analyzing trace with hash 839385935, now seen corresponding path program 1 times [2024-06-27 20:46:10,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:46:10,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785708864] [2024-06-27 20:46:10,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:46:10,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:46:10,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:46:12,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:46:12,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:46:12,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785708864] [2024-06-27 20:46:12,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785708864] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:46:12,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:46:12,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:46:12,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835546689] [2024-06-27 20:46:12,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:46:12,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:46:12,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:46:12,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:46:12,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:46:12,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:46:12,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 334 transitions, 4454 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:46:12,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:46:12,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:46:12,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:46:13,818 INFO L124 PetriNetUnfolderBase]: 3301/5566 cut-off events. [2024-06-27 20:46:13,819 INFO L125 PetriNetUnfolderBase]: For 222633/222635 co-relation queries the response was YES. [2024-06-27 20:46:13,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36802 conditions, 5566 events. 3301/5566 cut-off events. For 222633/222635 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 36384 event pairs, 776 based on Foata normal form. 1/5565 useless extension candidates. Maximal degree in co-relation 36707. Up to 5137 conditions per place. [2024-06-27 20:46:13,868 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 332 selfloop transitions, 15 changer transitions 0/352 dead transitions. [2024-06-27 20:46:13,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 352 transitions, 5242 flow [2024-06-27 20:46:13,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:46:13,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:46:13,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-27 20:46:13,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37755102040816324 [2024-06-27 20:46:13,870 INFO L175 Difference]: Start difference. First operand has 206 places, 334 transitions, 4454 flow. Second operand 7 states and 111 transitions. [2024-06-27 20:46:13,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 352 transitions, 5242 flow [2024-06-27 20:46:14,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 352 transitions, 5160 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-27 20:46:14,282 INFO L231 Difference]: Finished difference. Result has 208 places, 337 transitions, 4468 flow [2024-06-27 20:46:14,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4372, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4468, PETRI_PLACES=208, PETRI_TRANSITIONS=337} [2024-06-27 20:46:14,283 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 165 predicate places. [2024-06-27 20:46:14,283 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 337 transitions, 4468 flow [2024-06-27 20:46:14,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:46:14,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:46:14,284 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:46:14,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 20:46:14,284 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)] === [2024-06-27 20:46:14,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:46:14,284 INFO L85 PathProgramCache]: Analyzing trace with hash -2004232039, now seen corresponding path program 2 times [2024-06-27 20:46:14,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:46:14,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651478932] [2024-06-27 20:46:14,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:46:14,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:46:14,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:46:15,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:46:15,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:46:15,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651478932] [2024-06-27 20:46:15,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651478932] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:46:15,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:46:15,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:46:15,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374763388] [2024-06-27 20:46:15,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:46:15,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:46:15,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:46:15,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:46:15,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:46:15,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:46:15,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 337 transitions, 4468 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:46:15,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:46:15,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:46:15,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:46:17,238 INFO L124 PetriNetUnfolderBase]: 3298/5563 cut-off events. [2024-06-27 20:46:17,239 INFO L125 PetriNetUnfolderBase]: For 227647/227651 co-relation queries the response was YES. [2024-06-27 20:46:17,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36963 conditions, 5563 events. 3298/5563 cut-off events. For 227647/227651 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 36345 event pairs, 781 based on Foata normal form. 3/5564 useless extension candidates. Maximal degree in co-relation 36867. Up to 5119 conditions per place. [2024-06-27 20:46:17,298 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 321 selfloop transitions, 26 changer transitions 0/352 dead transitions. [2024-06-27 20:46:17,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 352 transitions, 5252 flow [2024-06-27 20:46:17,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:46:17,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:46:17,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 122 transitions. [2024-06-27 20:46:17,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3630952380952381 [2024-06-27 20:46:17,300 INFO L175 Difference]: Start difference. First operand has 208 places, 337 transitions, 4468 flow. Second operand 8 states and 122 transitions. [2024-06-27 20:46:17,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 352 transitions, 5252 flow [2024-06-27 20:46:17,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 352 transitions, 5178 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-27 20:46:17,778 INFO L231 Difference]: Finished difference. Result has 211 places, 340 transitions, 4519 flow [2024-06-27 20:46:17,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4394, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4519, PETRI_PLACES=211, PETRI_TRANSITIONS=340} [2024-06-27 20:46:17,778 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 168 predicate places. [2024-06-27 20:46:17,778 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 340 transitions, 4519 flow [2024-06-27 20:46:17,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:46:17,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:46:17,779 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:46:17,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 20:46:17,779 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)] === [2024-06-27 20:46:17,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:46:17,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1237589418, now seen corresponding path program 3 times [2024-06-27 20:46:17,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:46:17,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812560955] [2024-06-27 20:46:17,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:46:17,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:46:17,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:46:19,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:46:19,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:46:19,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812560955] [2024-06-27 20:46:19,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812560955] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:46:19,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:46:19,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:46:19,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342394209] [2024-06-27 20:46:19,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:46:19,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:46:19,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:46:19,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:46:19,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:46:19,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:46:19,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 340 transitions, 4519 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:46:19,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:46:19,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:46:19,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:46:20,675 INFO L124 PetriNetUnfolderBase]: 3292/5558 cut-off events. [2024-06-27 20:46:20,675 INFO L125 PetriNetUnfolderBase]: For 233373/233377 co-relation queries the response was YES. [2024-06-27 20:46:20,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37093 conditions, 5558 events. 3292/5558 cut-off events. For 233373/233377 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 36366 event pairs, 785 based on Foata normal form. 4/5560 useless extension candidates. Maximal degree in co-relation 36996. Up to 5093 conditions per place. [2024-06-27 20:46:20,723 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 323 selfloop transitions, 29 changer transitions 0/357 dead transitions. [2024-06-27 20:46:20,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 357 transitions, 5345 flow [2024-06-27 20:46:20,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:46:20,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:46:20,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-27 20:46:20,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3843537414965986 [2024-06-27 20:46:20,725 INFO L175 Difference]: Start difference. First operand has 211 places, 340 transitions, 4519 flow. Second operand 7 states and 113 transitions. [2024-06-27 20:46:20,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 357 transitions, 5345 flow [2024-06-27 20:46:21,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 357 transitions, 5244 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-27 20:46:21,180 INFO L231 Difference]: Finished difference. Result has 212 places, 343 transitions, 4552 flow [2024-06-27 20:46:21,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4418, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4552, PETRI_PLACES=212, PETRI_TRANSITIONS=343} [2024-06-27 20:46:21,181 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 169 predicate places. [2024-06-27 20:46:21,181 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 343 transitions, 4552 flow [2024-06-27 20:46:21,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:46:21,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:46:21,181 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:46:21,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 20:46:21,182 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)] === [2024-06-27 20:46:21,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:46:21,182 INFO L85 PathProgramCache]: Analyzing trace with hash -524098062, now seen corresponding path program 1 times [2024-06-27 20:46:21,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:46:21,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879385518] [2024-06-27 20:46:21,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:46:21,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:46:21,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:46:23,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:46:23,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:46:23,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879385518] [2024-06-27 20:46:23,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879385518] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:46:23,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:46:23,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:46:23,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078691882] [2024-06-27 20:46:23,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:46:23,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:46:23,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:46:23,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:46:23,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:46:23,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:46:23,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 343 transitions, 4552 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:46:23,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:46:23,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:46:23,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:46:25,357 INFO L124 PetriNetUnfolderBase]: 3302/5574 cut-off events. [2024-06-27 20:46:25,358 INFO L125 PetriNetUnfolderBase]: For 242187/242222 co-relation queries the response was YES. [2024-06-27 20:46:25,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37664 conditions, 5574 events. 3302/5574 cut-off events. For 242187/242222 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 36567 event pairs, 652 based on Foata normal form. 37/5609 useless extension candidates. Maximal degree in co-relation 37566. Up to 4905 conditions per place. [2024-06-27 20:46:25,409 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 310 selfloop transitions, 61 changer transitions 0/376 dead transitions. [2024-06-27 20:46:25,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 376 transitions, 5471 flow [2024-06-27 20:46:25,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:46:25,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:46:25,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-27 20:46:25,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-27 20:46:25,411 INFO L175 Difference]: Start difference. First operand has 212 places, 343 transitions, 4552 flow. Second operand 8 states and 141 transitions. [2024-06-27 20:46:25,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 376 transitions, 5471 flow [2024-06-27 20:46:25,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 376 transitions, 5365 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-27 20:46:25,819 INFO L231 Difference]: Finished difference. Result has 215 places, 347 transitions, 4661 flow [2024-06-27 20:46:25,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4446, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4661, PETRI_PLACES=215, PETRI_TRANSITIONS=347} [2024-06-27 20:46:25,820 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 172 predicate places. [2024-06-27 20:46:25,820 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 347 transitions, 4661 flow [2024-06-27 20:46:25,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:46:25,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:46:25,821 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:46:25,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 20:46:25,825 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)] === [2024-06-27 20:46:25,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:46:25,825 INFO L85 PathProgramCache]: Analyzing trace with hash -1900000796, now seen corresponding path program 1 times [2024-06-27 20:46:25,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:46:25,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624271108] [2024-06-27 20:46:25,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:46:25,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:46:25,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:46:27,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:46:27,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:46:27,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624271108] [2024-06-27 20:46:27,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624271108] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:46:27,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:46:27,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:46:27,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110330275] [2024-06-27 20:46:27,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:46:27,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:46:27,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:46:27,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:46:27,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:46:27,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:46:27,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 347 transitions, 4661 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:46:27,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:46:27,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:46:27,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:46:29,192 INFO L124 PetriNetUnfolderBase]: 3312/5572 cut-off events. [2024-06-27 20:46:29,192 INFO L125 PetriNetUnfolderBase]: For 250866/250872 co-relation queries the response was YES. [2024-06-27 20:46:29,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38438 conditions, 5572 events. 3312/5572 cut-off events. For 250866/250872 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 36385 event pairs, 668 based on Foata normal form. 6/5576 useless extension candidates. Maximal degree in co-relation 38339. Up to 4927 conditions per place. [2024-06-27 20:46:29,256 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 317 selfloop transitions, 53 changer transitions 0/375 dead transitions. [2024-06-27 20:46:29,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 375 transitions, 5544 flow [2024-06-27 20:46:29,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:46:29,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:46:29,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-27 20:46:29,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217687074829932 [2024-06-27 20:46:29,258 INFO L175 Difference]: Start difference. First operand has 215 places, 347 transitions, 4661 flow. Second operand 7 states and 124 transitions. [2024-06-27 20:46:29,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 375 transitions, 5544 flow [2024-06-27 20:46:29,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 375 transitions, 5357 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-27 20:46:29,804 INFO L231 Difference]: Finished difference. Result has 216 places, 351 transitions, 4665 flow [2024-06-27 20:46:29,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4474, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4665, PETRI_PLACES=216, PETRI_TRANSITIONS=351} [2024-06-27 20:46:29,805 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 173 predicate places. [2024-06-27 20:46:29,805 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 351 transitions, 4665 flow [2024-06-27 20:46:29,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:46:29,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:46:29,805 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:46:29,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 20:46:29,805 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)] === [2024-06-27 20:46:29,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:46:29,806 INFO L85 PathProgramCache]: Analyzing trace with hash -513917476, now seen corresponding path program 2 times [2024-06-27 20:46:29,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:46:29,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051766176] [2024-06-27 20:46:29,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:46:29,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:46:29,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:46:31,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:46:31,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:46:31,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051766176] [2024-06-27 20:46:31,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051766176] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:46:31,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:46:31,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:46:31,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702437351] [2024-06-27 20:46:31,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:46:31,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:46:31,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:46:31,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:46:31,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:46:31,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:46:31,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 351 transitions, 4665 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:46:31,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:46:31,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:46:31,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:46:33,243 INFO L124 PetriNetUnfolderBase]: 3303/5570 cut-off events. [2024-06-27 20:46:33,243 INFO L125 PetriNetUnfolderBase]: For 255977/255995 co-relation queries the response was YES. [2024-06-27 20:46:33,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38245 conditions, 5570 events. 3303/5570 cut-off events. For 255977/255995 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 36479 event pairs, 675 based on Foata normal form. 19/5587 useless extension candidates. Maximal degree in co-relation 38145. Up to 4862 conditions per place. [2024-06-27 20:46:33,307 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 308 selfloop transitions, 60 changer transitions 0/373 dead transitions. [2024-06-27 20:46:33,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 373 transitions, 5607 flow [2024-06-27 20:46:33,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:46:33,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:46:33,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-27 20:46:33,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41496598639455784 [2024-06-27 20:46:33,309 INFO L175 Difference]: Start difference. First operand has 216 places, 351 transitions, 4665 flow. Second operand 7 states and 122 transitions. [2024-06-27 20:46:33,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 373 transitions, 5607 flow [2024-06-27 20:46:33,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 373 transitions, 5473 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-27 20:46:33,816 INFO L231 Difference]: Finished difference. Result has 218 places, 353 transitions, 4699 flow [2024-06-27 20:46:33,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4531, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4699, PETRI_PLACES=218, PETRI_TRANSITIONS=353} [2024-06-27 20:46:33,816 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 175 predicate places. [2024-06-27 20:46:33,817 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 353 transitions, 4699 flow [2024-06-27 20:46:33,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:46:33,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:46:33,817 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:46:33,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 20:46:33,817 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)] === [2024-06-27 20:46:33,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:46:33,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1642119208, now seen corresponding path program 1 times [2024-06-27 20:46:33,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:46:33,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699892526] [2024-06-27 20:46:33,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:46:33,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:46:33,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:46:35,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:46:35,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:46:35,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699892526] [2024-06-27 20:46:35,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699892526] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:46:35,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:46:35,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:46:35,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826823519] [2024-06-27 20:46:35,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:46:35,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:46:35,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:46:35,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:46:35,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:46:35,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:46:35,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 353 transitions, 4699 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:46:35,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:46:35,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:46:35,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:46:37,210 INFO L124 PetriNetUnfolderBase]: 3180/5388 cut-off events. [2024-06-27 20:46:37,210 INFO L125 PetriNetUnfolderBase]: For 267458/267510 co-relation queries the response was YES. [2024-06-27 20:46:37,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37541 conditions, 5388 events. 3180/5388 cut-off events. For 267458/267510 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 35726 event pairs, 665 based on Foata normal form. 35/5383 useless extension candidates. Maximal degree in co-relation 37440. Up to 4793 conditions per place. [2024-06-27 20:46:37,264 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 322 selfloop transitions, 23 changer transitions 0/377 dead transitions. [2024-06-27 20:46:37,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 377 transitions, 5528 flow [2024-06-27 20:46:37,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:46:37,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:46:37,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-27 20:46:37,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-27 20:46:37,266 INFO L175 Difference]: Start difference. First operand has 218 places, 353 transitions, 4699 flow. Second operand 8 states and 134 transitions. [2024-06-27 20:46:37,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 377 transitions, 5528 flow [2024-06-27 20:46:37,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 377 transitions, 5392 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-27 20:46:37,793 INFO L231 Difference]: Finished difference. Result has 222 places, 355 transitions, 4684 flow [2024-06-27 20:46:37,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4563, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4684, PETRI_PLACES=222, PETRI_TRANSITIONS=355} [2024-06-27 20:46:37,793 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 179 predicate places. [2024-06-27 20:46:37,794 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 355 transitions, 4684 flow [2024-06-27 20:46:37,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:46:37,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:46:37,794 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:46:37,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 20:46:37,794 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)] === [2024-06-27 20:46:37,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:46:37,795 INFO L85 PathProgramCache]: Analyzing trace with hash 692422580, now seen corresponding path program 2 times [2024-06-27 20:46:37,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:46:37,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244279361] [2024-06-27 20:46:37,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:46:37,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:46:37,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:46:40,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:46:40,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:46:40,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244279361] [2024-06-27 20:46:40,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244279361] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:46:40,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:46:40,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:46:40,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949596388] [2024-06-27 20:46:40,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:46:40,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:46:40,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:46:40,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:46:40,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:46:40,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:46:40,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 355 transitions, 4684 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:46:40,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:46:40,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:46:40,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:46:42,010 INFO L124 PetriNetUnfolderBase]: 3347/5636 cut-off events. [2024-06-27 20:46:42,011 INFO L125 PetriNetUnfolderBase]: For 276893/276911 co-relation queries the response was YES. [2024-06-27 20:46:42,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39231 conditions, 5636 events. 3347/5636 cut-off events. For 276893/276911 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 36924 event pairs, 607 based on Foata normal form. 18/5652 useless extension candidates. Maximal degree in co-relation 39129. Up to 4276 conditions per place. [2024-06-27 20:46:42,062 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 223 selfloop transitions, 164 changer transitions 0/392 dead transitions. [2024-06-27 20:46:42,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 392 transitions, 6158 flow [2024-06-27 20:46:42,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:46:42,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:46:42,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-27 20:46:42,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-27 20:46:42,064 INFO L175 Difference]: Start difference. First operand has 222 places, 355 transitions, 4684 flow. Second operand 9 states and 157 transitions. [2024-06-27 20:46:42,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 392 transitions, 6158 flow [2024-06-27 20:46:42,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 392 transitions, 6053 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-27 20:46:42,654 INFO L231 Difference]: Finished difference. Result has 226 places, 363 transitions, 5120 flow [2024-06-27 20:46:42,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4579, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5120, PETRI_PLACES=226, PETRI_TRANSITIONS=363} [2024-06-27 20:46:42,656 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 183 predicate places. [2024-06-27 20:46:42,656 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 363 transitions, 5120 flow [2024-06-27 20:46:42,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:46:42,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:46:42,657 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:46:42,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 20:46:42,658 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)] === [2024-06-27 20:46:42,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:46:42,658 INFO L85 PathProgramCache]: Analyzing trace with hash 692410490, now seen corresponding path program 3 times [2024-06-27 20:46:42,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:46:42,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66509571] [2024-06-27 20:46:42,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:46:42,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:46:42,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:46:44,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:46:44,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:46:44,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66509571] [2024-06-27 20:46:44,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66509571] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:46:44,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:46:44,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:46:44,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755495617] [2024-06-27 20:46:44,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:46:44,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:46:44,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:46:44,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:46:44,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:46:44,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:46:44,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 363 transitions, 5120 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:46:44,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:46:44,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:46:44,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:46:46,300 INFO L124 PetriNetUnfolderBase]: 3351/5643 cut-off events. [2024-06-27 20:46:46,300 INFO L125 PetriNetUnfolderBase]: For 289339/289357 co-relation queries the response was YES. [2024-06-27 20:46:46,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40623 conditions, 5643 events. 3351/5643 cut-off events. For 289339/289357 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 36946 event pairs, 677 based on Foata normal form. 18/5659 useless extension candidates. Maximal degree in co-relation 40519. Up to 4923 conditions per place. [2024-06-27 20:46:46,361 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 318 selfloop transitions, 65 changer transitions 0/388 dead transitions. [2024-06-27 20:46:46,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 388 transitions, 6163 flow [2024-06-27 20:46:46,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:46:46,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:46:46,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-27 20:46:46,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-27 20:46:46,363 INFO L175 Difference]: Start difference. First operand has 226 places, 363 transitions, 5120 flow. Second operand 8 states and 135 transitions. [2024-06-27 20:46:46,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 388 transitions, 6163 flow [2024-06-27 20:46:46,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 388 transitions, 5793 flow, removed 77 selfloop flow, removed 6 redundant places. [2024-06-27 20:46:46,987 INFO L231 Difference]: Finished difference. Result has 228 places, 367 transitions, 4994 flow [2024-06-27 20:46:46,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4766, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4994, PETRI_PLACES=228, PETRI_TRANSITIONS=367} [2024-06-27 20:46:46,988 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 185 predicate places. [2024-06-27 20:46:46,988 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 367 transitions, 4994 flow [2024-06-27 20:46:46,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:46:46,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:46:46,988 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:46:46,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 20:46:46,989 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)] === [2024-06-27 20:46:46,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:46:46,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1489849124, now seen corresponding path program 3 times [2024-06-27 20:46:46,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:46:46,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059722665] [2024-06-27 20:46:46,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:46:46,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:46:47,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:46:48,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:46:48,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:46:48,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059722665] [2024-06-27 20:46:48,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059722665] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:46:48,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:46:48,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:46:48,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179051703] [2024-06-27 20:46:48,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:46:48,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:46:48,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:46:48,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:46:48,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:46:48,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:46:48,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 367 transitions, 4994 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:46:48,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:46:48,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:46:48,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:46:50,478 INFO L124 PetriNetUnfolderBase]: 3344/5620 cut-off events. [2024-06-27 20:46:50,478 INFO L125 PetriNetUnfolderBase]: For 289832/289851 co-relation queries the response was YES. [2024-06-27 20:46:50,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39559 conditions, 5620 events. 3344/5620 cut-off events. For 289832/289851 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 36705 event pairs, 683 based on Foata normal form. 7/5622 useless extension candidates. Maximal degree in co-relation 39454. Up to 4986 conditions per place. [2024-06-27 20:46:50,534 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 330 selfloop transitions, 53 changer transitions 0/388 dead transitions. [2024-06-27 20:46:50,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 388 transitions, 5832 flow [2024-06-27 20:46:50,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:46:50,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:46:50,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-27 20:46:50,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40816326530612246 [2024-06-27 20:46:50,536 INFO L175 Difference]: Start difference. First operand has 228 places, 367 transitions, 4994 flow. Second operand 7 states and 120 transitions. [2024-06-27 20:46:50,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 388 transitions, 5832 flow [2024-06-27 20:46:51,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 388 transitions, 5611 flow, removed 48 selfloop flow, removed 6 redundant places. [2024-06-27 20:46:51,099 INFO L231 Difference]: Finished difference. Result has 229 places, 367 transitions, 4886 flow [2024-06-27 20:46:51,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4773, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4886, PETRI_PLACES=229, PETRI_TRANSITIONS=367} [2024-06-27 20:46:51,099 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 186 predicate places. [2024-06-27 20:46:51,100 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 367 transitions, 4886 flow [2024-06-27 20:46:51,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:46:51,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:46:51,100 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:46:51,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 20:46:51,100 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)] === [2024-06-27 20:46:51,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:46:51,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1464818056, now seen corresponding path program 4 times [2024-06-27 20:46:51,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:46:51,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779542136] [2024-06-27 20:46:51,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:46:51,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:46:51,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:46:52,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:46:52,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:46:52,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779542136] [2024-06-27 20:46:52,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779542136] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:46:52,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:46:52,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:46:52,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968620794] [2024-06-27 20:46:52,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:46:52,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:46:52,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:46:52,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:46:52,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:46:52,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:46:52,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 367 transitions, 4886 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:46:52,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:46:52,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:46:52,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:46:54,326 INFO L124 PetriNetUnfolderBase]: 3354/5648 cut-off events. [2024-06-27 20:46:54,326 INFO L125 PetriNetUnfolderBase]: For 300805/300807 co-relation queries the response was YES. [2024-06-27 20:46:54,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39761 conditions, 5648 events. 3354/5648 cut-off events. For 300805/300807 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 36936 event pairs, 771 based on Foata normal form. 2/5648 useless extension candidates. Maximal degree in co-relation 39655. Up to 5210 conditions per place. [2024-06-27 20:46:54,391 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 366 selfloop transitions, 17 changer transitions 0/388 dead transitions. [2024-06-27 20:46:54,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 388 transitions, 5824 flow [2024-06-27 20:46:54,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:46:54,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:46:54,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-27 20:46:54,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-27 20:46:54,399 INFO L175 Difference]: Start difference. First operand has 229 places, 367 transitions, 4886 flow. Second operand 7 states and 112 transitions. [2024-06-27 20:46:54,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 388 transitions, 5824 flow [2024-06-27 20:46:55,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 388 transitions, 5643 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-27 20:46:55,068 INFO L231 Difference]: Finished difference. Result has 229 places, 372 transitions, 4874 flow [2024-06-27 20:46:55,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4705, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4874, PETRI_PLACES=229, PETRI_TRANSITIONS=372} [2024-06-27 20:46:55,069 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 186 predicate places. [2024-06-27 20:46:55,069 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 372 transitions, 4874 flow [2024-06-27 20:46:55,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:46:55,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:46:55,070 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:46:55,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 20:46:55,070 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)] === [2024-06-27 20:46:55,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:46:55,070 INFO L85 PathProgramCache]: Analyzing trace with hash -289440122, now seen corresponding path program 5 times [2024-06-27 20:46:55,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:46:55,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626554899] [2024-06-27 20:46:55,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:46:55,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:46:55,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:46:56,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:46:56,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:46:56,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626554899] [2024-06-27 20:46:56,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626554899] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:46:56,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:46:56,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:46:56,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245784025] [2024-06-27 20:46:56,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:46:56,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:46:56,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:46:56,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:46:56,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:46:57,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:46:57,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 372 transitions, 4874 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:46:57,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:46:57,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:46:57,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:46:58,373 INFO L124 PetriNetUnfolderBase]: 3359/5658 cut-off events. [2024-06-27 20:46:58,374 INFO L125 PetriNetUnfolderBase]: For 306030/306034 co-relation queries the response was YES. [2024-06-27 20:46:58,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39846 conditions, 5658 events. 3359/5658 cut-off events. For 306030/306034 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 37110 event pairs, 777 based on Foata normal form. 3/5659 useless extension candidates. Maximal degree in co-relation 39739. Up to 5214 conditions per place. [2024-06-27 20:46:58,429 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 361 selfloop transitions, 20 changer transitions 0/386 dead transitions. [2024-06-27 20:46:58,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 386 transitions, 5720 flow [2024-06-27 20:46:58,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:46:58,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:46:58,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 109 transitions. [2024-06-27 20:46:58,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3707482993197279 [2024-06-27 20:46:58,430 INFO L175 Difference]: Start difference. First operand has 229 places, 372 transitions, 4874 flow. Second operand 7 states and 109 transitions. [2024-06-27 20:46:58,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 386 transitions, 5720 flow [2024-06-27 20:46:59,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 386 transitions, 5612 flow, removed 40 selfloop flow, removed 5 redundant places. [2024-06-27 20:46:59,013 INFO L231 Difference]: Finished difference. Result has 231 places, 375 transitions, 4874 flow [2024-06-27 20:46:59,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4766, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4874, PETRI_PLACES=231, PETRI_TRANSITIONS=375} [2024-06-27 20:46:59,014 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 188 predicate places. [2024-06-27 20:46:59,014 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 375 transitions, 4874 flow [2024-06-27 20:46:59,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:46:59,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:46:59,014 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:46:59,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 20:46:59,014 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)] === [2024-06-27 20:46:59,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:46:59,015 INFO L85 PathProgramCache]: Analyzing trace with hash -289647512, now seen corresponding path program 6 times [2024-06-27 20:46:59,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:46:59,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904972580] [2024-06-27 20:46:59,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:46:59,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:46:59,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:01,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:01,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:01,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904972580] [2024-06-27 20:47:01,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904972580] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:01,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:01,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:47:01,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045340944] [2024-06-27 20:47:01,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:01,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:47:01,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:01,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:47:01,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:47:01,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:47:01,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 375 transitions, 4874 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:01,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:01,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:47:01,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:02,678 INFO L124 PetriNetUnfolderBase]: 3351/5641 cut-off events. [2024-06-27 20:47:02,679 INFO L125 PetriNetUnfolderBase]: For 311962/312008 co-relation queries the response was YES. [2024-06-27 20:47:02,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39729 conditions, 5641 events. 3351/5641 cut-off events. For 311962/312008 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 36926 event pairs, 705 based on Foata normal form. 28/5664 useless extension candidates. Maximal degree in co-relation 39621. Up to 4898 conditions per place. [2024-06-27 20:47:02,741 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 308 selfloop transitions, 75 changer transitions 0/388 dead transitions. [2024-06-27 20:47:02,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 388 transitions, 5693 flow [2024-06-27 20:47:02,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:47:02,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:47:02,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-27 20:47:02,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-27 20:47:02,743 INFO L175 Difference]: Start difference. First operand has 231 places, 375 transitions, 4874 flow. Second operand 7 states and 116 transitions. [2024-06-27 20:47:02,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 388 transitions, 5693 flow [2024-06-27 20:47:03,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 388 transitions, 5571 flow, removed 43 selfloop flow, removed 5 redundant places. [2024-06-27 20:47:03,333 INFO L231 Difference]: Finished difference. Result has 233 places, 376 transitions, 4927 flow [2024-06-27 20:47:03,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4760, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4927, PETRI_PLACES=233, PETRI_TRANSITIONS=376} [2024-06-27 20:47:03,334 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 190 predicate places. [2024-06-27 20:47:03,334 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 376 transitions, 4927 flow [2024-06-27 20:47:03,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:03,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:03,334 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:03,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 20:47:03,335 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)] === [2024-06-27 20:47:03,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:03,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1242634422, now seen corresponding path program 4 times [2024-06-27 20:47:03,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:03,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240039395] [2024-06-27 20:47:03,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:03,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:03,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:06,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:06,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:06,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240039395] [2024-06-27 20:47:06,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240039395] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:06,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:06,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:47:06,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710980460] [2024-06-27 20:47:06,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:06,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:47:06,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:06,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:47:06,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:47:06,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:47:06,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 376 transitions, 4927 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:06,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:06,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:47:06,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:07,522 INFO L124 PetriNetUnfolderBase]: 3361/5660 cut-off events. [2024-06-27 20:47:07,522 INFO L125 PetriNetUnfolderBase]: For 321909/321913 co-relation queries the response was YES. [2024-06-27 20:47:07,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40188 conditions, 5660 events. 3361/5660 cut-off events. For 321909/321913 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 37075 event pairs, 777 based on Foata normal form. 4/5662 useless extension candidates. Maximal degree in co-relation 40079. Up to 5189 conditions per place. [2024-06-27 20:47:07,587 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 351 selfloop transitions, 36 changer transitions 0/392 dead transitions. [2024-06-27 20:47:07,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 392 transitions, 5829 flow [2024-06-27 20:47:07,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:47:07,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:47:07,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-27 20:47:07,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37202380952380953 [2024-06-27 20:47:07,589 INFO L175 Difference]: Start difference. First operand has 233 places, 376 transitions, 4927 flow. Second operand 8 states and 125 transitions. [2024-06-27 20:47:07,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 392 transitions, 5829 flow [2024-06-27 20:47:08,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 392 transitions, 5679 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-27 20:47:08,332 INFO L231 Difference]: Finished difference. Result has 237 places, 380 transitions, 4962 flow [2024-06-27 20:47:08,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4777, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4962, PETRI_PLACES=237, PETRI_TRANSITIONS=380} [2024-06-27 20:47:08,333 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 194 predicate places. [2024-06-27 20:47:08,333 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 380 transitions, 4962 flow [2024-06-27 20:47:08,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:08,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:08,333 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:08,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 20:47:08,333 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)] === [2024-06-27 20:47:08,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:08,334 INFO L85 PathProgramCache]: Analyzing trace with hash -295145114, now seen corresponding path program 2 times [2024-06-27 20:47:08,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:08,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265880392] [2024-06-27 20:47:08,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:08,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:08,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:11,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:11,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:11,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265880392] [2024-06-27 20:47:11,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265880392] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:11,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:11,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:47:11,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440120060] [2024-06-27 20:47:11,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:11,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:47:11,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:11,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:47:11,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:47:11,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:47:11,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 380 transitions, 4962 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:11,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:11,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:47:11,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:12,543 INFO L124 PetriNetUnfolderBase]: 3238/5453 cut-off events. [2024-06-27 20:47:12,543 INFO L125 PetriNetUnfolderBase]: For 340169/340224 co-relation queries the response was YES. [2024-06-27 20:47:12,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39579 conditions, 5453 events. 3238/5453 cut-off events. For 340169/340224 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 35959 event pairs, 711 based on Foata normal form. 36/5441 useless extension candidates. Maximal degree in co-relation 39469. Up to 4891 conditions per place. [2024-06-27 20:47:12,604 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 339 selfloop transitions, 17 changer transitions 0/395 dead transitions. [2024-06-27 20:47:12,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 395 transitions, 5786 flow [2024-06-27 20:47:12,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:47:12,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:47:12,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-27 20:47:12,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-27 20:47:12,605 INFO L175 Difference]: Start difference. First operand has 237 places, 380 transitions, 4962 flow. Second operand 8 states and 126 transitions. [2024-06-27 20:47:12,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 395 transitions, 5786 flow [2024-06-27 20:47:13,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 395 transitions, 5629 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-06-27 20:47:13,359 INFO L231 Difference]: Finished difference. Result has 239 places, 382 transitions, 4928 flow [2024-06-27 20:47:13,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4805, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4928, PETRI_PLACES=239, PETRI_TRANSITIONS=382} [2024-06-27 20:47:13,360 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 196 predicate places. [2024-06-27 20:47:13,360 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 382 transitions, 4928 flow [2024-06-27 20:47:13,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:13,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:13,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:13,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 20:47:13,361 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)] === [2024-06-27 20:47:13,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:13,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1036508630, now seen corresponding path program 5 times [2024-06-27 20:47:13,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:13,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258339312] [2024-06-27 20:47:13,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:13,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:13,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:15,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:15,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:15,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258339312] [2024-06-27 20:47:15,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258339312] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:15,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:15,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:47:15,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700462084] [2024-06-27 20:47:15,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:15,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:47:15,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:15,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:47:15,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:47:15,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:47:15,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 382 transitions, 4928 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:15,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:15,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:47:15,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:17,336 INFO L124 PetriNetUnfolderBase]: 3397/5716 cut-off events. [2024-06-27 20:47:17,336 INFO L125 PetriNetUnfolderBase]: For 346484/346488 co-relation queries the response was YES. [2024-06-27 20:47:17,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41364 conditions, 5716 events. 3397/5716 cut-off events. For 346484/346488 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 37494 event pairs, 777 based on Foata normal form. 4/5718 useless extension candidates. Maximal degree in co-relation 41253. Up to 5209 conditions per place. [2024-06-27 20:47:17,398 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 353 selfloop transitions, 44 changer transitions 0/402 dead transitions. [2024-06-27 20:47:17,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 402 transitions, 6100 flow [2024-06-27 20:47:17,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:47:17,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:47:17,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-27 20:47:17,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.391156462585034 [2024-06-27 20:47:17,400 INFO L175 Difference]: Start difference. First operand has 239 places, 382 transitions, 4928 flow. Second operand 7 states and 115 transitions. [2024-06-27 20:47:17,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 402 transitions, 6100 flow [2024-06-27 20:47:18,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 402 transitions, 5993 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-27 20:47:18,202 INFO L231 Difference]: Finished difference. Result has 241 places, 390 transitions, 5178 flow [2024-06-27 20:47:18,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4821, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5178, PETRI_PLACES=241, PETRI_TRANSITIONS=390} [2024-06-27 20:47:18,202 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 198 predicate places. [2024-06-27 20:47:18,203 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 390 transitions, 5178 flow [2024-06-27 20:47:18,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:18,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:18,203 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:18,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 20:47:18,203 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)] === [2024-06-27 20:47:18,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:18,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1228812762, now seen corresponding path program 6 times [2024-06-27 20:47:18,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:18,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549338611] [2024-06-27 20:47:18,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:18,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:18,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:20,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:20,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:20,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549338611] [2024-06-27 20:47:20,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549338611] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:20,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:20,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:47:20,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56746067] [2024-06-27 20:47:20,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:20,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:47:20,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:20,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:47:20,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:47:20,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:47:20,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 390 transitions, 5178 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:20,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:20,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:47:20,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:22,192 INFO L124 PetriNetUnfolderBase]: 3401/5720 cut-off events. [2024-06-27 20:47:22,192 INFO L125 PetriNetUnfolderBase]: For 355172/355218 co-relation queries the response was YES. [2024-06-27 20:47:22,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41966 conditions, 5720 events. 3401/5720 cut-off events. For 355172/355218 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 37500 event pairs, 702 based on Foata normal form. 28/5743 useless extension candidates. Maximal degree in co-relation 41853. Up to 4915 conditions per place. [2024-06-27 20:47:22,251 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 316 selfloop transitions, 92 changer transitions 0/413 dead transitions. [2024-06-27 20:47:22,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 413 transitions, 6536 flow [2024-06-27 20:47:22,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:47:22,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:47:22,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-27 20:47:22,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-27 20:47:22,253 INFO L175 Difference]: Start difference. First operand has 241 places, 390 transitions, 5178 flow. Second operand 8 states and 133 transitions. [2024-06-27 20:47:22,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 413 transitions, 6536 flow [2024-06-27 20:47:23,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 413 transitions, 6391 flow, removed 63 selfloop flow, removed 3 redundant places. [2024-06-27 20:47:23,031 INFO L231 Difference]: Finished difference. Result has 247 places, 398 transitions, 5481 flow [2024-06-27 20:47:23,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5041, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5481, PETRI_PLACES=247, PETRI_TRANSITIONS=398} [2024-06-27 20:47:23,041 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 204 predicate places. [2024-06-27 20:47:23,041 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 398 transitions, 5481 flow [2024-06-27 20:47:23,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:23,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:23,041 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:23,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 20:47:23,042 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)] === [2024-06-27 20:47:23,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:23,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1031266638, now seen corresponding path program 3 times [2024-06-27 20:47:23,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:23,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644408697] [2024-06-27 20:47:23,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:23,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:23,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:25,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:25,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:25,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644408697] [2024-06-27 20:47:25,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644408697] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:25,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:25,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:47:25,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618991395] [2024-06-27 20:47:25,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:25,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:47:25,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:25,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:47:25,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:47:25,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:47:25,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 398 transitions, 5481 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:25,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:25,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:47:25,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:26,954 INFO L124 PetriNetUnfolderBase]: 3278/5552 cut-off events. [2024-06-27 20:47:26,954 INFO L125 PetriNetUnfolderBase]: For 364670/364724 co-relation queries the response was YES. [2024-06-27 20:47:26,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41697 conditions, 5552 events. 3278/5552 cut-off events. For 364670/364724 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 36871 event pairs, 651 based on Foata normal form. 34/5550 useless extension candidates. Maximal degree in co-relation 41581. Up to 4897 conditions per place. [2024-06-27 20:47:27,020 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 342 selfloop transitions, 30 changer transitions 0/415 dead transitions. [2024-06-27 20:47:27,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 415 transitions, 6366 flow [2024-06-27 20:47:27,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:47:27,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:47:27,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-27 20:47:27,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38392857142857145 [2024-06-27 20:47:27,022 INFO L175 Difference]: Start difference. First operand has 247 places, 398 transitions, 5481 flow. Second operand 8 states and 129 transitions. [2024-06-27 20:47:27,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 415 transitions, 6366 flow [2024-06-27 20:47:27,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 415 transitions, 6113 flow, removed 72 selfloop flow, removed 4 redundant places. [2024-06-27 20:47:27,941 INFO L231 Difference]: Finished difference. Result has 251 places, 400 transitions, 5385 flow [2024-06-27 20:47:27,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5228, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5385, PETRI_PLACES=251, PETRI_TRANSITIONS=400} [2024-06-27 20:47:27,941 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 208 predicate places. [2024-06-27 20:47:27,942 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 400 transitions, 5385 flow [2024-06-27 20:47:27,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:27,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:27,942 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:27,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 20:47:27,942 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)] === [2024-06-27 20:47:27,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:27,943 INFO L85 PathProgramCache]: Analyzing trace with hash -280860314, now seen corresponding path program 4 times [2024-06-27 20:47:27,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:27,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675350090] [2024-06-27 20:47:27,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:27,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:27,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:30,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:30,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:30,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675350090] [2024-06-27 20:47:30,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675350090] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:30,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:30,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:47:30,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647857946] [2024-06-27 20:47:30,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:30,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:47:30,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:30,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:47:30,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:47:30,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:47:30,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 400 transitions, 5385 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:30,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:30,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:47:30,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:31,926 INFO L124 PetriNetUnfolderBase]: 3273/5545 cut-off events. [2024-06-27 20:47:31,926 INFO L125 PetriNetUnfolderBase]: For 369668/369722 co-relation queries the response was YES. [2024-06-27 20:47:31,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41479 conditions, 5545 events. 3273/5545 cut-off events. For 369668/369722 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 36876 event pairs, 648 based on Foata normal form. 34/5543 useless extension candidates. Maximal degree in co-relation 41361. Up to 4870 conditions per place. [2024-06-27 20:47:31,991 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 340 selfloop transitions, 35 changer transitions 0/418 dead transitions. [2024-06-27 20:47:31,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 418 transitions, 6282 flow [2024-06-27 20:47:31,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:47:31,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:47:31,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-27 20:47:31,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-27 20:47:31,992 INFO L175 Difference]: Start difference. First operand has 251 places, 400 transitions, 5385 flow. Second operand 8 states and 130 transitions. [2024-06-27 20:47:31,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 418 transitions, 6282 flow [2024-06-27 20:47:32,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 418 transitions, 6141 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-27 20:47:32,854 INFO L231 Difference]: Finished difference. Result has 253 places, 402 transitions, 5415 flow [2024-06-27 20:47:32,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5244, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5415, PETRI_PLACES=253, PETRI_TRANSITIONS=402} [2024-06-27 20:47:32,856 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 210 predicate places. [2024-06-27 20:47:32,856 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 402 transitions, 5415 flow [2024-06-27 20:47:32,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:32,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:32,857 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:32,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 20:47:32,857 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)] === [2024-06-27 20:47:32,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:32,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1889484166, now seen corresponding path program 1 times [2024-06-27 20:47:32,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:32,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449467640] [2024-06-27 20:47:32,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:32,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:32,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:34,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:34,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:34,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449467640] [2024-06-27 20:47:34,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449467640] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:34,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:34,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:47:34,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418494142] [2024-06-27 20:47:34,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:34,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:47:34,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:34,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:47:34,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:47:34,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:47:34,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 402 transitions, 5415 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:34,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:34,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:47:34,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:36,671 INFO L124 PetriNetUnfolderBase]: 3401/5723 cut-off events. [2024-06-27 20:47:36,671 INFO L125 PetriNetUnfolderBase]: For 370923/370925 co-relation queries the response was YES. [2024-06-27 20:47:36,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42460 conditions, 5723 events. 3401/5723 cut-off events. For 370923/370925 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 37554 event pairs, 770 based on Foata normal form. 1/5722 useless extension candidates. Maximal degree in co-relation 42341. Up to 5262 conditions per place. [2024-06-27 20:47:36,729 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 406 selfloop transitions, 18 changer transitions 0/429 dead transitions. [2024-06-27 20:47:36,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 429 transitions, 6378 flow [2024-06-27 20:47:36,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:47:36,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:47:36,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-27 20:47:36,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-27 20:47:36,731 INFO L175 Difference]: Start difference. First operand has 253 places, 402 transitions, 5415 flow. Second operand 8 states and 131 transitions. [2024-06-27 20:47:36,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 429 transitions, 6378 flow [2024-06-27 20:47:37,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 429 transitions, 6223 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-27 20:47:37,724 INFO L231 Difference]: Finished difference. Result has 255 places, 405 transitions, 5357 flow [2024-06-27 20:47:37,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5260, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5357, PETRI_PLACES=255, PETRI_TRANSITIONS=405} [2024-06-27 20:47:37,725 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 212 predicate places. [2024-06-27 20:47:37,725 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 405 transitions, 5357 flow [2024-06-27 20:47:37,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:37,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:37,725 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:37,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 20:47:37,726 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)] === [2024-06-27 20:47:37,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:37,726 INFO L85 PathProgramCache]: Analyzing trace with hash -1317170486, now seen corresponding path program 1 times [2024-06-27 20:47:37,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:37,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614794571] [2024-06-27 20:47:37,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:37,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:37,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:39,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:39,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:39,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614794571] [2024-06-27 20:47:39,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614794571] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:39,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:39,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:47:39,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913708431] [2024-06-27 20:47:39,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:39,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:47:39,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:39,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:47:39,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:47:39,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:47:39,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 405 transitions, 5357 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:39,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:39,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:47:39,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:41,353 INFO L124 PetriNetUnfolderBase]: 3406/5730 cut-off events. [2024-06-27 20:47:41,354 INFO L125 PetriNetUnfolderBase]: For 376971/376973 co-relation queries the response was YES. [2024-06-27 20:47:41,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42548 conditions, 5730 events. 3406/5730 cut-off events. For 376971/376973 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 37527 event pairs, 769 based on Foata normal form. 1/5729 useless extension candidates. Maximal degree in co-relation 42428. Up to 5277 conditions per place. [2024-06-27 20:47:41,424 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 406 selfloop transitions, 18 changer transitions 0/429 dead transitions. [2024-06-27 20:47:41,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 429 transitions, 6336 flow [2024-06-27 20:47:41,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:47:41,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:47:41,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-27 20:47:41,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37797619047619047 [2024-06-27 20:47:41,426 INFO L175 Difference]: Start difference. First operand has 255 places, 405 transitions, 5357 flow. Second operand 8 states and 127 transitions. [2024-06-27 20:47:41,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 429 transitions, 6336 flow [2024-06-27 20:47:42,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 429 transitions, 6270 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-27 20:47:42,562 INFO L231 Difference]: Finished difference. Result has 258 places, 409 transitions, 5422 flow [2024-06-27 20:47:42,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5291, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5422, PETRI_PLACES=258, PETRI_TRANSITIONS=409} [2024-06-27 20:47:42,563 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 215 predicate places. [2024-06-27 20:47:42,563 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 409 transitions, 5422 flow [2024-06-27 20:47:42,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:42,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:42,564 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:42,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 20:47:42,564 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)] === [2024-06-27 20:47:42,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:42,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1312528856, now seen corresponding path program 2 times [2024-06-27 20:47:42,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:42,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640363037] [2024-06-27 20:47:42,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:42,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:42,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:44,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:44,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:44,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640363037] [2024-06-27 20:47:44,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640363037] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:44,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:44,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:47:44,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138760004] [2024-06-27 20:47:44,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:44,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:47:44,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:44,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:47:44,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:47:44,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:47:44,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 409 transitions, 5422 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:44,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:44,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:47:44,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:45,821 INFO L124 PetriNetUnfolderBase]: 3411/5737 cut-off events. [2024-06-27 20:47:45,821 INFO L125 PetriNetUnfolderBase]: For 387217/387219 co-relation queries the response was YES. [2024-06-27 20:47:45,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43052 conditions, 5737 events. 3411/5737 cut-off events. For 387217/387219 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 37549 event pairs, 769 based on Foata normal form. 1/5736 useless extension candidates. Maximal degree in co-relation 42930. Up to 5278 conditions per place. [2024-06-27 20:47:45,891 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 403 selfloop transitions, 23 changer transitions 0/431 dead transitions. [2024-06-27 20:47:45,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 431 transitions, 6418 flow [2024-06-27 20:47:45,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:47:45,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:47:45,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-27 20:47:45,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37202380952380953 [2024-06-27 20:47:45,892 INFO L175 Difference]: Start difference. First operand has 258 places, 409 transitions, 5422 flow. Second operand 8 states and 125 transitions. [2024-06-27 20:47:45,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 431 transitions, 6418 flow [2024-06-27 20:47:46,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 431 transitions, 6324 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-27 20:47:46,944 INFO L231 Difference]: Finished difference. Result has 262 places, 415 transitions, 5496 flow [2024-06-27 20:47:46,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5328, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5496, PETRI_PLACES=262, PETRI_TRANSITIONS=415} [2024-06-27 20:47:46,944 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 219 predicate places. [2024-06-27 20:47:46,944 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 415 transitions, 5496 flow [2024-06-27 20:47:46,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:46,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:46,945 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:46,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 20:47:46,945 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)] === [2024-06-27 20:47:46,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:46,946 INFO L85 PathProgramCache]: Analyzing trace with hash 251161946, now seen corresponding path program 1 times [2024-06-27 20:47:46,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:46,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159134565] [2024-06-27 20:47:46,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:46,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:46,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:48,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:48,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:48,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159134565] [2024-06-27 20:47:48,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159134565] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:48,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:48,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:47:48,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964187405] [2024-06-27 20:47:48,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:48,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:47:48,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:48,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:47:48,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:47:48,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:47:48,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 415 transitions, 5496 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:48,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:48,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:47:48,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:50,461 INFO L124 PetriNetUnfolderBase]: 3419/5749 cut-off events. [2024-06-27 20:47:50,461 INFO L125 PetriNetUnfolderBase]: For 401332/401334 co-relation queries the response was YES. [2024-06-27 20:47:50,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43598 conditions, 5749 events. 3419/5749 cut-off events. For 401332/401334 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 37657 event pairs, 769 based on Foata normal form. 2/5749 useless extension candidates. Maximal degree in co-relation 43474. Up to 5301 conditions per place. [2024-06-27 20:47:50,525 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 412 selfloop transitions, 17 changer transitions 0/434 dead transitions. [2024-06-27 20:47:50,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 434 transitions, 6466 flow [2024-06-27 20:47:50,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:47:50,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:47:50,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-27 20:47:50,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36607142857142855 [2024-06-27 20:47:50,526 INFO L175 Difference]: Start difference. First operand has 262 places, 415 transitions, 5496 flow. Second operand 8 states and 123 transitions. [2024-06-27 20:47:50,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 434 transitions, 6466 flow [2024-06-27 20:47:51,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 434 transitions, 6359 flow, removed 43 selfloop flow, removed 4 redundant places. [2024-06-27 20:47:51,793 INFO L231 Difference]: Finished difference. Result has 266 places, 417 transitions, 5500 flow [2024-06-27 20:47:51,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5389, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5500, PETRI_PLACES=266, PETRI_TRANSITIONS=417} [2024-06-27 20:47:51,794 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 223 predicate places. [2024-06-27 20:47:51,794 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 417 transitions, 5500 flow [2024-06-27 20:47:51,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:51,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:51,795 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:51,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 20:47:51,795 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)] === [2024-06-27 20:47:51,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:51,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1894252462, now seen corresponding path program 3 times [2024-06-27 20:47:51,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:51,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947262008] [2024-06-27 20:47:51,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:51,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:51,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:53,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:53,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:53,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947262008] [2024-06-27 20:47:53,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947262008] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:53,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:53,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:47:53,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542907186] [2024-06-27 20:47:53,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:53,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:47:53,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:53,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:47:53,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:47:53,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:47:53,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 417 transitions, 5500 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:53,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:53,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:47:53,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:55,706 INFO L124 PetriNetUnfolderBase]: 3437/5774 cut-off events. [2024-06-27 20:47:55,707 INFO L125 PetriNetUnfolderBase]: For 415466/415468 co-relation queries the response was YES. [2024-06-27 20:47:55,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44182 conditions, 5774 events. 3437/5774 cut-off events. For 415466/415468 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 37806 event pairs, 769 based on Foata normal form. 2/5774 useless extension candidates. Maximal degree in co-relation 44056. Up to 5293 conditions per place. [2024-06-27 20:47:55,775 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 397 selfloop transitions, 40 changer transitions 0/442 dead transitions. [2024-06-27 20:47:55,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 442 transitions, 6746 flow [2024-06-27 20:47:55,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:47:55,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:47:55,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-27 20:47:55,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3783068783068783 [2024-06-27 20:47:55,777 INFO L175 Difference]: Start difference. First operand has 266 places, 417 transitions, 5500 flow. Second operand 9 states and 143 transitions. [2024-06-27 20:47:55,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 442 transitions, 6746 flow [2024-06-27 20:47:56,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 442 transitions, 6645 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-27 20:47:56,683 INFO L231 Difference]: Finished difference. Result has 269 places, 424 transitions, 5679 flow [2024-06-27 20:47:56,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5399, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5679, PETRI_PLACES=269, PETRI_TRANSITIONS=424} [2024-06-27 20:47:56,683 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 226 predicate places. [2024-06-27 20:47:56,684 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 424 transitions, 5679 flow [2024-06-27 20:47:56,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:56,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:56,684 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:56,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 20:47:56,684 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)] === [2024-06-27 20:47:56,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:56,685 INFO L85 PathProgramCache]: Analyzing trace with hash -281151032, now seen corresponding path program 2 times [2024-06-27 20:47:56,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:56,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370685015] [2024-06-27 20:47:56,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:56,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:56,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:58,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:58,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:58,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370685015] [2024-06-27 20:47:58,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370685015] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:58,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:58,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:47:58,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201195616] [2024-06-27 20:47:58,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:58,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:47:58,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:58,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:47:58,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:47:58,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:47:58,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 424 transitions, 5679 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:58,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:58,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:47:58,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:00,200 INFO L124 PetriNetUnfolderBase]: 3445/5787 cut-off events. [2024-06-27 20:48:00,200 INFO L125 PetriNetUnfolderBase]: For 429127/429131 co-relation queries the response was YES. [2024-06-27 20:48:00,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44933 conditions, 5787 events. 3445/5787 cut-off events. For 429127/429131 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 37908 event pairs, 776 based on Foata normal form. 4/5789 useless extension candidates. Maximal degree in co-relation 44806. Up to 5324 conditions per place. [2024-06-27 20:48:00,276 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 407 selfloop transitions, 28 changer transitions 0/440 dead transitions. [2024-06-27 20:48:00,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 440 transitions, 6657 flow [2024-06-27 20:48:00,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:48:00,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:48:00,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 134 transitions. [2024-06-27 20:48:00,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3544973544973545 [2024-06-27 20:48:00,278 INFO L175 Difference]: Start difference. First operand has 269 places, 424 transitions, 5679 flow. Second operand 9 states and 134 transitions. [2024-06-27 20:48:00,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 440 transitions, 6657 flow [2024-06-27 20:48:01,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 440 transitions, 6521 flow, removed 50 selfloop flow, removed 6 redundant places. [2024-06-27 20:48:01,231 INFO L231 Difference]: Finished difference. Result has 272 places, 426 transitions, 5682 flow [2024-06-27 20:48:01,232 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5545, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5682, PETRI_PLACES=272, PETRI_TRANSITIONS=426} [2024-06-27 20:48:01,232 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 229 predicate places. [2024-06-27 20:48:01,232 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 426 transitions, 5682 flow [2024-06-27 20:48:01,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:01,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:01,233 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:48:01,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 20:48:01,233 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)] === [2024-06-27 20:48:01,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:01,233 INFO L85 PathProgramCache]: Analyzing trace with hash -281151280, now seen corresponding path program 4 times [2024-06-27 20:48:01,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:01,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603527940] [2024-06-27 20:48:01,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:01,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:01,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:03,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:03,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:03,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603527940] [2024-06-27 20:48:03,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603527940] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:03,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:03,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:48:03,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567863189] [2024-06-27 20:48:03,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:03,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:48:03,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:03,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:48:03,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:48:03,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:48:03,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 426 transitions, 5682 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:03,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:03,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:48:03,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:04,698 INFO L124 PetriNetUnfolderBase]: 3455/5802 cut-off events. [2024-06-27 20:48:04,699 INFO L125 PetriNetUnfolderBase]: For 436010/436014 co-relation queries the response was YES. [2024-06-27 20:48:04,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45119 conditions, 5802 events. 3455/5802 cut-off events. For 436010/436014 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 38038 event pairs, 781 based on Foata normal form. 3/5803 useless extension candidates. Maximal degree in co-relation 44991. Up to 5305 conditions per place. [2024-06-27 20:48:04,776 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 398 selfloop transitions, 50 changer transitions 0/453 dead transitions. [2024-06-27 20:48:04,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 453 transitions, 7007 flow [2024-06-27 20:48:04,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:48:04,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:48:04,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-27 20:48:04,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-27 20:48:04,778 INFO L175 Difference]: Start difference. First operand has 272 places, 426 transitions, 5682 flow. Second operand 8 states and 126 transitions. [2024-06-27 20:48:04,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 453 transitions, 7007 flow [2024-06-27 20:48:06,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 453 transitions, 6881 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-06-27 20:48:06,013 INFO L231 Difference]: Finished difference. Result has 276 places, 440 transitions, 5972 flow [2024-06-27 20:48:06,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5561, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5972, PETRI_PLACES=276, PETRI_TRANSITIONS=440} [2024-06-27 20:48:06,017 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 233 predicate places. [2024-06-27 20:48:06,017 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 440 transitions, 5972 flow [2024-06-27 20:48:06,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:06,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:06,017 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:48:06,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-27 20:48:06,018 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)] === [2024-06-27 20:48:06,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:06,018 INFO L85 PathProgramCache]: Analyzing trace with hash -280854362, now seen corresponding path program 3 times [2024-06-27 20:48:06,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:06,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947643850] [2024-06-27 20:48:06,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:06,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:06,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:08,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:08,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:08,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947643850] [2024-06-27 20:48:08,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947643850] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:08,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:08,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:48:08,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013486316] [2024-06-27 20:48:08,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:08,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:48:08,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:08,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:48:08,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:48:08,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:48:08,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 440 transitions, 5972 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:08,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:08,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:48:08,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:09,509 INFO L124 PetriNetUnfolderBase]: 3450/5794 cut-off events. [2024-06-27 20:48:09,509 INFO L125 PetriNetUnfolderBase]: For 444653/444657 co-relation queries the response was YES. [2024-06-27 20:48:09,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45306 conditions, 5794 events. 3450/5794 cut-off events. For 444653/444657 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 37942 event pairs, 771 based on Foata normal form. 4/5796 useless extension candidates. Maximal degree in co-relation 45174. Up to 5308 conditions per place. [2024-06-27 20:48:09,586 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 416 selfloop transitions, 35 changer transitions 0/456 dead transitions. [2024-06-27 20:48:09,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 456 transitions, 6986 flow [2024-06-27 20:48:09,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:48:09,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:48:09,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-27 20:48:09,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36607142857142855 [2024-06-27 20:48:09,587 INFO L175 Difference]: Start difference. First operand has 276 places, 440 transitions, 5972 flow. Second operand 8 states and 123 transitions. [2024-06-27 20:48:09,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 456 transitions, 6986 flow [2024-06-27 20:48:10,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 456 transitions, 6861 flow, removed 57 selfloop flow, removed 2 redundant places. [2024-06-27 20:48:10,824 INFO L231 Difference]: Finished difference. Result has 282 places, 442 transitions, 6004 flow [2024-06-27 20:48:10,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5847, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6004, PETRI_PLACES=282, PETRI_TRANSITIONS=442} [2024-06-27 20:48:10,824 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 239 predicate places. [2024-06-27 20:48:10,825 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 442 transitions, 6004 flow [2024-06-27 20:48:10,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:10,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:10,825 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:48:10,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-27 20:48:10,825 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)] === [2024-06-27 20:48:10,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:10,826 INFO L85 PathProgramCache]: Analyzing trace with hash 2066742352, now seen corresponding path program 5 times [2024-06-27 20:48:10,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:10,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81968634] [2024-06-27 20:48:10,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:10,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:10,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:12,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:12,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:12,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81968634] [2024-06-27 20:48:12,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81968634] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:12,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:12,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:48:12,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913914052] [2024-06-27 20:48:12,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:12,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:48:12,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:12,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:48:12,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:48:12,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:48:12,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 442 transitions, 6004 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:12,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:12,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:48:12,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:14,612 INFO L124 PetriNetUnfolderBase]: 3452/5798 cut-off events. [2024-06-27 20:48:14,613 INFO L125 PetriNetUnfolderBase]: For 451189/451193 co-relation queries the response was YES. [2024-06-27 20:48:14,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45311 conditions, 5798 events. 3452/5798 cut-off events. For 451189/451193 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 37983 event pairs, 780 based on Foata normal form. 4/5800 useless extension candidates. Maximal degree in co-relation 45177. Up to 5311 conditions per place. [2024-06-27 20:48:14,684 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 411 selfloop transitions, 42 changer transitions 0/458 dead transitions. [2024-06-27 20:48:14,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 458 transitions, 7036 flow [2024-06-27 20:48:14,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:48:14,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:48:14,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 138 transitions. [2024-06-27 20:48:14,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36507936507936506 [2024-06-27 20:48:14,686 INFO L175 Difference]: Start difference. First operand has 282 places, 442 transitions, 6004 flow. Second operand 9 states and 138 transitions. [2024-06-27 20:48:14,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 458 transitions, 7036 flow [2024-06-27 20:48:16,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 458 transitions, 6859 flow, removed 55 selfloop flow, removed 6 redundant places. [2024-06-27 20:48:16,007 INFO L231 Difference]: Finished difference. Result has 285 places, 445 transitions, 6022 flow [2024-06-27 20:48:16,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5827, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6022, PETRI_PLACES=285, PETRI_TRANSITIONS=445} [2024-06-27 20:48:16,008 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 242 predicate places. [2024-06-27 20:48:16,008 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 445 transitions, 6022 flow [2024-06-27 20:48:16,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:16,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:16,008 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:48:16,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-27 20:48:16,009 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)] === [2024-06-27 20:48:16,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:16,009 INFO L85 PathProgramCache]: Analyzing trace with hash -335131347, now seen corresponding path program 1 times [2024-06-27 20:48:16,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:16,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941062811] [2024-06-27 20:48:16,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:16,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:16,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:18,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:18,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:18,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941062811] [2024-06-27 20:48:18,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941062811] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:18,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:18,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:48:18,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217355777] [2024-06-27 20:48:18,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:18,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:48:18,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:18,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:48:18,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:48:18,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:48:18,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 445 transitions, 6022 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:18,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:18,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:48:18,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:20,170 INFO L124 PetriNetUnfolderBase]: 3585/5981 cut-off events. [2024-06-27 20:48:20,170 INFO L125 PetriNetUnfolderBase]: For 522903/522938 co-relation queries the response was YES. [2024-06-27 20:48:20,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48732 conditions, 5981 events. 3585/5981 cut-off events. For 522903/522938 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 39016 event pairs, 523 based on Foata normal form. 39/6018 useless extension candidates. Maximal degree in co-relation 48597. Up to 4943 conditions per place. [2024-06-27 20:48:20,279 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 422 selfloop transitions, 70 changer transitions 0/497 dead transitions. [2024-06-27 20:48:20,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 497 transitions, 7593 flow [2024-06-27 20:48:20,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:48:20,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:48:20,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-27 20:48:20,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-27 20:48:20,280 INFO L175 Difference]: Start difference. First operand has 285 places, 445 transitions, 6022 flow. Second operand 9 states and 164 transitions. [2024-06-27 20:48:20,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 497 transitions, 7593 flow [2024-06-27 20:48:21,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 497 transitions, 7392 flow, removed 59 selfloop flow, removed 8 redundant places. [2024-06-27 20:48:21,717 INFO L231 Difference]: Finished difference. Result has 287 places, 450 transitions, 6129 flow [2024-06-27 20:48:21,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5821, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6129, PETRI_PLACES=287, PETRI_TRANSITIONS=450} [2024-06-27 20:48:21,717 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 244 predicate places. [2024-06-27 20:48:21,717 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 450 transitions, 6129 flow [2024-06-27 20:48:21,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:21,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:21,718 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:48:21,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-27 20:48:21,718 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)] === [2024-06-27 20:48:21,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:21,718 INFO L85 PathProgramCache]: Analyzing trace with hash -325608147, now seen corresponding path program 2 times [2024-06-27 20:48:21,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:21,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815093509] [2024-06-27 20:48:21,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:21,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:21,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:23,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:23,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:23,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815093509] [2024-06-27 20:48:23,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815093509] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:23,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:23,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:48:23,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134799288] [2024-06-27 20:48:23,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:23,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:48:23,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:23,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:48:23,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:48:24,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:48:24,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 450 transitions, 6129 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:24,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:24,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:48:24,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:26,198 INFO L124 PetriNetUnfolderBase]: 3588/6010 cut-off events. [2024-06-27 20:48:26,199 INFO L125 PetriNetUnfolderBase]: For 530320/530355 co-relation queries the response was YES. [2024-06-27 20:48:26,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49324 conditions, 6010 events. 3588/6010 cut-off events. For 530320/530355 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 39503 event pairs, 670 based on Foata normal form. 39/6047 useless extension candidates. Maximal degree in co-relation 49188. Up to 5239 conditions per place. [2024-06-27 20:48:26,270 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 397 selfloop transitions, 85 changer transitions 0/487 dead transitions. [2024-06-27 20:48:26,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 487 transitions, 7426 flow [2024-06-27 20:48:26,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:48:26,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:48:26,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 171 transitions. [2024-06-27 20:48:26,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40714285714285714 [2024-06-27 20:48:26,272 INFO L175 Difference]: Start difference. First operand has 287 places, 450 transitions, 6129 flow. Second operand 10 states and 171 transitions. [2024-06-27 20:48:26,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 487 transitions, 7426 flow [2024-06-27 20:48:27,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 487 transitions, 7275 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-27 20:48:27,565 INFO L231 Difference]: Finished difference. Result has 293 places, 453 transitions, 6259 flow [2024-06-27 20:48:27,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5978, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6259, PETRI_PLACES=293, PETRI_TRANSITIONS=453} [2024-06-27 20:48:27,566 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 250 predicate places. [2024-06-27 20:48:27,566 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 453 transitions, 6259 flow [2024-06-27 20:48:27,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:27,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:27,573 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:48:27,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-27 20:48:27,573 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)] === [2024-06-27 20:48:27,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:27,574 INFO L85 PathProgramCache]: Analyzing trace with hash -10121457, now seen corresponding path program 3 times [2024-06-27 20:48:27,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:27,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125238895] [2024-06-27 20:48:27,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:27,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:27,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:29,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:29,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:29,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125238895] [2024-06-27 20:48:29,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125238895] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:29,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:29,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:48:29,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83601385] [2024-06-27 20:48:29,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:29,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:48:29,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:29,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:48:29,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:48:29,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:48:29,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 453 transitions, 6259 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:29,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:29,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:48:29,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:31,503 INFO L124 PetriNetUnfolderBase]: 3591/6009 cut-off events. [2024-06-27 20:48:31,504 INFO L125 PetriNetUnfolderBase]: For 541361/541379 co-relation queries the response was YES. [2024-06-27 20:48:31,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49710 conditions, 6009 events. 3591/6009 cut-off events. For 541361/541379 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 39438 event pairs, 700 based on Foata normal form. 20/6027 useless extension candidates. Maximal degree in co-relation 49571. Up to 5270 conditions per place. [2024-06-27 20:48:31,583 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 408 selfloop transitions, 64 changer transitions 0/477 dead transitions. [2024-06-27 20:48:31,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 477 transitions, 7352 flow [2024-06-27 20:48:31,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:48:31,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:48:31,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-27 20:48:31,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-27 20:48:31,586 INFO L175 Difference]: Start difference. First operand has 293 places, 453 transitions, 6259 flow. Second operand 8 states and 134 transitions. [2024-06-27 20:48:31,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 477 transitions, 7352 flow [2024-06-27 20:48:32,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 477 transitions, 7181 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-27 20:48:32,895 INFO L231 Difference]: Finished difference. Result has 295 places, 456 transitions, 6317 flow [2024-06-27 20:48:32,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6088, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6317, PETRI_PLACES=295, PETRI_TRANSITIONS=456} [2024-06-27 20:48:32,896 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 252 predicate places. [2024-06-27 20:48:32,896 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 456 transitions, 6317 flow [2024-06-27 20:48:32,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:32,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:32,897 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:48:32,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-27 20:48:32,897 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)] === [2024-06-27 20:48:32,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:32,897 INFO L85 PathProgramCache]: Analyzing trace with hash 622800837, now seen corresponding path program 1 times [2024-06-27 20:48:32,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:32,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026643724] [2024-06-27 20:48:32,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:32,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:32,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:35,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:35,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:35,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026643724] [2024-06-27 20:48:35,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026643724] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:35,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:35,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:48:35,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015554696] [2024-06-27 20:48:35,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:35,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:48:35,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:35,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:48:35,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:48:35,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:48:35,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 456 transitions, 6317 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:35,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:35,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:48:35,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:37,672 INFO L124 PetriNetUnfolderBase]: 3647/6103 cut-off events. [2024-06-27 20:48:37,672 INFO L125 PetriNetUnfolderBase]: For 601900/601935 co-relation queries the response was YES. [2024-06-27 20:48:37,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50825 conditions, 6103 events. 3647/6103 cut-off events. For 601900/601935 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 40202 event pairs, 678 based on Foata normal form. 51/6152 useless extension candidates. Maximal degree in co-relation 50685. Up to 5273 conditions per place. [2024-06-27 20:48:37,745 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 404 selfloop transitions, 89 changer transitions 0/498 dead transitions. [2024-06-27 20:48:37,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 498 transitions, 7890 flow [2024-06-27 20:48:37,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:48:37,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:48:37,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 188 transitions. [2024-06-27 20:48:37,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069264069264069 [2024-06-27 20:48:37,747 INFO L175 Difference]: Start difference. First operand has 295 places, 456 transitions, 6317 flow. Second operand 11 states and 188 transitions. [2024-06-27 20:48:37,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 498 transitions, 7890 flow [2024-06-27 20:48:39,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 498 transitions, 7692 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-27 20:48:39,077 INFO L231 Difference]: Finished difference. Result has 300 places, 458 transitions, 6397 flow [2024-06-27 20:48:39,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6119, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6397, PETRI_PLACES=300, PETRI_TRANSITIONS=458} [2024-06-27 20:48:39,077 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 257 predicate places. [2024-06-27 20:48:39,078 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 458 transitions, 6397 flow [2024-06-27 20:48:39,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:39,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:39,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:48:39,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-27 20:48:39,078 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)] === [2024-06-27 20:48:39,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:39,079 INFO L85 PathProgramCache]: Analyzing trace with hash -6294753, now seen corresponding path program 1 times [2024-06-27 20:48:39,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:39,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885779244] [2024-06-27 20:48:39,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:39,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:39,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:41,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:41,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:41,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885779244] [2024-06-27 20:48:41,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885779244] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:41,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:41,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:48:41,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550891663] [2024-06-27 20:48:41,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:41,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:48:41,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:41,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:48:41,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:48:41,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:48:41,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 458 transitions, 6397 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:41,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:41,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:48:41,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:43,302 INFO L124 PetriNetUnfolderBase]: 3677/6123 cut-off events. [2024-06-27 20:48:43,303 INFO L125 PetriNetUnfolderBase]: For 582968/582976 co-relation queries the response was YES. [2024-06-27 20:48:43,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51468 conditions, 6123 events. 3677/6123 cut-off events. For 582968/582976 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 40106 event pairs, 728 based on Foata normal form. 10/6130 useless extension candidates. Maximal degree in co-relation 51327. Up to 4894 conditions per place. [2024-06-27 20:48:43,387 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 320 selfloop transitions, 171 changer transitions 0/496 dead transitions. [2024-06-27 20:48:43,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 496 transitions, 7649 flow [2024-06-27 20:48:43,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:48:43,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:48:43,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-27 20:48:43,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-27 20:48:43,389 INFO L175 Difference]: Start difference. First operand has 300 places, 458 transitions, 6397 flow. Second operand 8 states and 147 transitions. [2024-06-27 20:48:43,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 496 transitions, 7649 flow [2024-06-27 20:48:44,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 496 transitions, 7425 flow, removed 25 selfloop flow, removed 9 redundant places. [2024-06-27 20:48:44,892 INFO L231 Difference]: Finished difference. Result has 299 places, 465 transitions, 6697 flow [2024-06-27 20:48:44,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6173, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=458, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6697, PETRI_PLACES=299, PETRI_TRANSITIONS=465} [2024-06-27 20:48:44,893 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 256 predicate places. [2024-06-27 20:48:44,893 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 465 transitions, 6697 flow [2024-06-27 20:48:44,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:44,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:44,894 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:48:44,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-27 20:48:44,894 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)] === [2024-06-27 20:48:44,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:44,894 INFO L85 PathProgramCache]: Analyzing trace with hash -216651765, now seen corresponding path program 2 times [2024-06-27 20:48:44,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:44,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971423764] [2024-06-27 20:48:44,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:44,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:44,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:46,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:46,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:46,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971423764] [2024-06-27 20:48:46,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971423764] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:46,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:46,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:48:46,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120659910] [2024-06-27 20:48:46,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:46,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:48:46,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:46,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:48:46,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:48:46,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:48:46,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 465 transitions, 6697 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:46,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:46,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:48:46,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:49,375 INFO L124 PetriNetUnfolderBase]: 3872/6431 cut-off events. [2024-06-27 20:48:49,375 INFO L125 PetriNetUnfolderBase]: For 685534/685538 co-relation queries the response was YES. [2024-06-27 20:48:49,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57372 conditions, 6431 events. 3872/6431 cut-off events. For 685534/685538 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 42292 event pairs, 754 based on Foata normal form. 4/6432 useless extension candidates. Maximal degree in co-relation 57230. Up to 4837 conditions per place. [2024-06-27 20:48:49,456 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 306 selfloop transitions, 214 changer transitions 0/525 dead transitions. [2024-06-27 20:48:49,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 525 transitions, 8806 flow [2024-06-27 20:48:49,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:48:49,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:48:49,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 182 transitions. [2024-06-27 20:48:49,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-27 20:48:49,458 INFO L175 Difference]: Start difference. First operand has 299 places, 465 transitions, 6697 flow. Second operand 10 states and 182 transitions. [2024-06-27 20:48:49,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 525 transitions, 8806 flow [2024-06-27 20:48:51,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 525 transitions, 8359 flow, removed 60 selfloop flow, removed 6 redundant places. [2024-06-27 20:48:51,145 INFO L231 Difference]: Finished difference. Result has 305 places, 489 transitions, 7359 flow [2024-06-27 20:48:51,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6250, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=196, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7359, PETRI_PLACES=305, PETRI_TRANSITIONS=489} [2024-06-27 20:48:51,146 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 262 predicate places. [2024-06-27 20:48:51,146 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 489 transitions, 7359 flow [2024-06-27 20:48:51,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:51,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:51,146 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:48:51,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-27 20:48:51,147 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)] === [2024-06-27 20:48:51,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:51,147 INFO L85 PathProgramCache]: Analyzing trace with hash -216651548, now seen corresponding path program 1 times [2024-06-27 20:48:51,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:51,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627730158] [2024-06-27 20:48:51,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:51,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:51,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:53,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:53,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:53,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627730158] [2024-06-27 20:48:53,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627730158] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:53,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:53,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:48:53,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313318255] [2024-06-27 20:48:53,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:53,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:48:53,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:53,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:48:53,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:48:53,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:48:53,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 489 transitions, 7359 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:53,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:53,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:48:53,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:55,522 INFO L124 PetriNetUnfolderBase]: 3895/6478 cut-off events. [2024-06-27 20:48:55,522 INFO L125 PetriNetUnfolderBase]: For 708363/708369 co-relation queries the response was YES. [2024-06-27 20:48:55,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59180 conditions, 6478 events. 3895/6478 cut-off events. For 708363/708369 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 42752 event pairs, 714 based on Foata normal form. 6/6482 useless extension candidates. Maximal degree in co-relation 59035. Up to 5699 conditions per place. [2024-06-27 20:48:55,614 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 440 selfloop transitions, 88 changer transitions 0/533 dead transitions. [2024-06-27 20:48:55,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 533 transitions, 9137 flow [2024-06-27 20:48:55,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:48:55,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:48:55,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 169 transitions. [2024-06-27 20:48:55,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4023809523809524 [2024-06-27 20:48:55,616 INFO L175 Difference]: Start difference. First operand has 305 places, 489 transitions, 7359 flow. Second operand 10 states and 169 transitions. [2024-06-27 20:48:55,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 533 transitions, 9137 flow [2024-06-27 20:48:57,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 533 transitions, 8705 flow, removed 111 selfloop flow, removed 5 redundant places. [2024-06-27 20:48:57,223 INFO L231 Difference]: Finished difference. Result has 312 places, 503 transitions, 7479 flow [2024-06-27 20:48:57,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6977, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7479, PETRI_PLACES=312, PETRI_TRANSITIONS=503} [2024-06-27 20:48:57,224 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 269 predicate places. [2024-06-27 20:48:57,224 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 503 transitions, 7479 flow [2024-06-27 20:48:57,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:57,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:57,224 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:48:57,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-27 20:48:57,224 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:48:57,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:57,225 INFO L85 PathProgramCache]: Analyzing trace with hash -9731198, now seen corresponding path program 2 times [2024-06-27 20:48:57,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:57,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479407978] [2024-06-27 20:48:57,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:57,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:57,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:59,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:59,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:59,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479407978] [2024-06-27 20:48:59,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479407978] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:59,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:59,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:48:59,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316971173] [2024-06-27 20:48:59,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:59,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:48:59,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:59,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:48:59,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:48:59,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:48:59,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 503 transitions, 7479 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:59,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:59,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:48:59,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:49:01,660 INFO L124 PetriNetUnfolderBase]: 3905/6506 cut-off events. [2024-06-27 20:49:01,660 INFO L125 PetriNetUnfolderBase]: For 722411/722429 co-relation queries the response was YES. [2024-06-27 20:49:01,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59376 conditions, 6506 events. 3905/6506 cut-off events. For 722411/722429 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 43121 event pairs, 606 based on Foata normal form. 18/6522 useless extension candidates. Maximal degree in co-relation 59227. Up to 5038 conditions per place. [2024-06-27 20:49:01,753 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 323 selfloop transitions, 207 changer transitions 0/535 dead transitions. [2024-06-27 20:49:01,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 535 transitions, 9145 flow [2024-06-27 20:49:01,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:49:01,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:49:01,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-27 20:49:01,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-27 20:49:01,754 INFO L175 Difference]: Start difference. First operand has 312 places, 503 transitions, 7479 flow. Second operand 9 states and 156 transitions. [2024-06-27 20:49:01,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 535 transitions, 9145 flow [2024-06-27 20:49:03,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 535 transitions, 8961 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-27 20:49:03,491 INFO L231 Difference]: Finished difference. Result has 315 places, 507 transitions, 7813 flow [2024-06-27 20:49:03,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7295, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=203, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7813, PETRI_PLACES=315, PETRI_TRANSITIONS=507} [2024-06-27 20:49:03,492 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 272 predicate places. [2024-06-27 20:49:03,492 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 507 transitions, 7813 flow [2024-06-27 20:49:03,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:49:03,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:49:03,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:49:03,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-27 20:49:03,493 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:49:03,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:49:03,493 INFO L85 PathProgramCache]: Analyzing trace with hash -9998325, now seen corresponding path program 3 times [2024-06-27 20:49:03,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:49:03,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884663769] [2024-06-27 20:49:03,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:49:03,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:49:03,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:49:05,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:49:05,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:49:05,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884663769] [2024-06-27 20:49:05,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884663769] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:49:05,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:49:05,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:49:05,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290267845] [2024-06-27 20:49:05,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:49:05,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:49:05,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:49:05,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:49:05,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:49:05,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:49:05,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 507 transitions, 7813 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:49:05,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:49:05,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:49:05,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:49:07,693 INFO L124 PetriNetUnfolderBase]: 3925/6531 cut-off events. [2024-06-27 20:49:07,693 INFO L125 PetriNetUnfolderBase]: For 748122/748126 co-relation queries the response was YES. [2024-06-27 20:49:07,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60610 conditions, 6531 events. 3925/6531 cut-off events. For 748122/748126 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 43151 event pairs, 818 based on Foata normal form. 4/6532 useless extension candidates. Maximal degree in co-relation 60460. Up to 4988 conditions per place. [2024-06-27 20:49:07,791 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 340 selfloop transitions, 197 changer transitions 0/542 dead transitions. [2024-06-27 20:49:07,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 542 transitions, 9566 flow [2024-06-27 20:49:07,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:49:07,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:49:07,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-27 20:49:07,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-27 20:49:07,796 INFO L175 Difference]: Start difference. First operand has 315 places, 507 transitions, 7813 flow. Second operand 8 states and 142 transitions. [2024-06-27 20:49:07,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 542 transitions, 9566 flow [2024-06-27 20:49:09,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 542 transitions, 9119 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-27 20:49:09,787 INFO L231 Difference]: Finished difference. Result has 318 places, 519 transitions, 8255 flow [2024-06-27 20:49:09,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7368, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=507, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8255, PETRI_PLACES=318, PETRI_TRANSITIONS=519} [2024-06-27 20:49:09,787 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 275 predicate places. [2024-06-27 20:49:09,788 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 519 transitions, 8255 flow [2024-06-27 20:49:09,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:49:09,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:49:09,788 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:49:09,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-27 20:49:09,788 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:49:09,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:49:09,789 INFO L85 PathProgramCache]: Analyzing trace with hash 633637042, now seen corresponding path program 3 times [2024-06-27 20:49:09,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:49:09,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853559632] [2024-06-27 20:49:09,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:49:09,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:49:09,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:49:12,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:49:12,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:49:12,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853559632] [2024-06-27 20:49:12,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853559632] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:49:12,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:49:12,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:49:12,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981654993] [2024-06-27 20:49:12,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:49:12,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:49:12,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:49:12,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:49:12,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:49:12,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:49:12,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 519 transitions, 8255 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:49:12,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:49:12,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:49:12,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:49:14,298 INFO L124 PetriNetUnfolderBase]: 3927/6547 cut-off events. [2024-06-27 20:49:14,299 INFO L125 PetriNetUnfolderBase]: For 760142/760160 co-relation queries the response was YES. [2024-06-27 20:49:14,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61300 conditions, 6547 events. 3927/6547 cut-off events. For 760142/760160 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 43421 event pairs, 722 based on Foata normal form. 18/6563 useless extension candidates. Maximal degree in co-relation 61148. Up to 5761 conditions per place. [2024-06-27 20:49:14,403 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 470 selfloop transitions, 67 changer transitions 0/542 dead transitions. [2024-06-27 20:49:14,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 542 transitions, 9471 flow [2024-06-27 20:49:14,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:49:14,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:49:14,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-27 20:49:14,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-27 20:49:14,404 INFO L175 Difference]: Start difference. First operand has 318 places, 519 transitions, 8255 flow. Second operand 8 states and 134 transitions. [2024-06-27 20:49:14,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 542 transitions, 9471 flow [2024-06-27 20:49:16,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 542 transitions, 9130 flow, removed 91 selfloop flow, removed 4 redundant places. [2024-06-27 20:49:16,788 INFO L231 Difference]: Finished difference. Result has 322 places, 522 transitions, 8146 flow [2024-06-27 20:49:16,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7914, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8146, PETRI_PLACES=322, PETRI_TRANSITIONS=522} [2024-06-27 20:49:16,788 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 279 predicate places. [2024-06-27 20:49:16,789 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 522 transitions, 8146 flow [2024-06-27 20:49:16,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:49:16,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:49:16,789 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:49:16,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-27 20:49:16,789 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:49:16,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:49:16,790 INFO L85 PathProgramCache]: Analyzing trace with hash 633913407, now seen corresponding path program 2 times [2024-06-27 20:49:16,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:49:16,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377854505] [2024-06-27 20:49:16,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:49:16,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:49:16,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:49:19,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:49:19,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:49:19,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377854505] [2024-06-27 20:49:19,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377854505] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:49:19,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:49:19,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:49:19,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927109518] [2024-06-27 20:49:19,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:49:19,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:49:19,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:49:19,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:49:19,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:49:19,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:49:19,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 522 transitions, 8146 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:49:19,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:49:19,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:49:19,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:49:21,786 INFO L124 PetriNetUnfolderBase]: 4079/6793 cut-off events. [2024-06-27 20:49:21,787 INFO L125 PetriNetUnfolderBase]: For 892775/892793 co-relation queries the response was YES. [2024-06-27 20:49:21,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66020 conditions, 6793 events. 4079/6793 cut-off events. For 892775/892793 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 45401 event pairs, 749 based on Foata normal form. 28/6819 useless extension candidates. Maximal degree in co-relation 65866. Up to 5626 conditions per place. [2024-06-27 20:49:21,914 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 466 selfloop transitions, 86 changer transitions 0/557 dead transitions. [2024-06-27 20:49:21,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 557 transitions, 10006 flow [2024-06-27 20:49:21,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:49:21,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:49:21,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-27 20:49:21,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-27 20:49:21,916 INFO L175 Difference]: Start difference. First operand has 322 places, 522 transitions, 8146 flow. Second operand 9 states and 154 transitions. [2024-06-27 20:49:21,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 557 transitions, 10006 flow [2024-06-27 20:49:24,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 557 transitions, 9808 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-27 20:49:24,049 INFO L231 Difference]: Finished difference. Result has 326 places, 526 transitions, 8341 flow [2024-06-27 20:49:24,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7948, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=437, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8341, PETRI_PLACES=326, PETRI_TRANSITIONS=526} [2024-06-27 20:49:24,050 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 283 predicate places. [2024-06-27 20:49:24,050 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 526 transitions, 8341 flow [2024-06-27 20:49:24,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:49:24,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:49:24,050 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:49:24,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-27 20:49:24,051 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:49:24,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:49:24,051 INFO L85 PathProgramCache]: Analyzing trace with hash -10109553, now seen corresponding path program 3 times [2024-06-27 20:49:24,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:49:24,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501885453] [2024-06-27 20:49:24,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:49:24,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:49:24,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:49:26,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:49:26,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:49:26,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501885453] [2024-06-27 20:49:26,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501885453] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:49:26,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:49:26,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:49:26,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662613462] [2024-06-27 20:49:26,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:49:26,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:49:26,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:49:26,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:49:26,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:49:26,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:49:26,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 526 transitions, 8341 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:49:26,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:49:26,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:49:26,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:49:28,886 INFO L124 PetriNetUnfolderBase]: 4135/6881 cut-off events. [2024-06-27 20:49:28,886 INFO L125 PetriNetUnfolderBase]: For 943616/943634 co-relation queries the response was YES. [2024-06-27 20:49:28,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67687 conditions, 6881 events. 4135/6881 cut-off events. For 943616/943634 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 46080 event pairs, 772 based on Foata normal form. 32/6911 useless extension candidates. Maximal degree in co-relation 67531. Up to 6021 conditions per place. [2024-06-27 20:49:28,992 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 478 selfloop transitions, 70 changer transitions 0/553 dead transitions. [2024-06-27 20:49:28,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 553 transitions, 9662 flow [2024-06-27 20:49:28,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:49:28,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:49:28,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-27 20:49:28,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3941798941798942 [2024-06-27 20:49:28,994 INFO L175 Difference]: Start difference. First operand has 326 places, 526 transitions, 8341 flow. Second operand 9 states and 149 transitions. [2024-06-27 20:49:28,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 553 transitions, 9662 flow [2024-06-27 20:49:31,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 553 transitions, 9470 flow, removed 43 selfloop flow, removed 5 redundant places. [2024-06-27 20:49:31,416 INFO L231 Difference]: Finished difference. Result has 330 places, 528 transitions, 8398 flow [2024-06-27 20:49:31,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8151, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8398, PETRI_PLACES=330, PETRI_TRANSITIONS=528} [2024-06-27 20:49:31,417 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 287 predicate places. [2024-06-27 20:49:31,417 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 528 transitions, 8398 flow [2024-06-27 20:49:31,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:49:31,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:49:31,417 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:49:31,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-27 20:49:31,417 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:49:31,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:49:31,418 INFO L85 PathProgramCache]: Analyzing trace with hash -9734763, now seen corresponding path program 4 times [2024-06-27 20:49:31,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:49:31,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197935370] [2024-06-27 20:49:31,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:49:31,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:49:31,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:49:34,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:49:34,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:49:34,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197935370] [2024-06-27 20:49:34,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197935370] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:49:34,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:49:34,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:49:34,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117658681] [2024-06-27 20:49:34,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:49:34,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:49:34,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:49:34,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:49:34,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:49:34,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:49:34,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 528 transitions, 8398 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:49:34,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:49:34,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:49:34,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:49:36,401 INFO L124 PetriNetUnfolderBase]: 4321/7165 cut-off events. [2024-06-27 20:49:36,401 INFO L125 PetriNetUnfolderBase]: For 968355/968382 co-relation queries the response was YES. [2024-06-27 20:49:36,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70640 conditions, 7165 events. 4321/7165 cut-off events. For 968355/968382 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 48105 event pairs, 784 based on Foata normal form. 34/7195 useless extension candidates. Maximal degree in co-relation 70482. Up to 6245 conditions per place. [2024-06-27 20:49:36,514 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 513 selfloop transitions, 90 changer transitions 0/608 dead transitions. [2024-06-27 20:49:36,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 608 transitions, 10854 flow [2024-06-27 20:49:36,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:49:36,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:49:36,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 162 transitions. [2024-06-27 20:49:36,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38571428571428573 [2024-06-27 20:49:36,516 INFO L175 Difference]: Start difference. First operand has 330 places, 528 transitions, 8398 flow. Second operand 10 states and 162 transitions. [2024-06-27 20:49:36,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 608 transitions, 10854 flow [2024-06-27 20:49:38,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 608 transitions, 10610 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-27 20:49:38,762 INFO L231 Difference]: Finished difference. Result has 336 places, 574 transitions, 9313 flow [2024-06-27 20:49:38,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8208, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=528, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9313, PETRI_PLACES=336, PETRI_TRANSITIONS=574} [2024-06-27 20:49:38,763 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 293 predicate places. [2024-06-27 20:49:38,763 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 574 transitions, 9313 flow [2024-06-27 20:49:38,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:49:38,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:49:38,764 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:49:38,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-27 20:49:38,764 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:49:38,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:49:38,764 INFO L85 PathProgramCache]: Analyzing trace with hash -559962353, now seen corresponding path program 4 times [2024-06-27 20:49:38,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:49:38,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547791216] [2024-06-27 20:49:38,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:49:38,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:49:38,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:49:42,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:49:42,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:49:42,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547791216] [2024-06-27 20:49:42,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547791216] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:49:42,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:49:42,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:49:42,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090263593] [2024-06-27 20:49:42,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:49:42,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:49:42,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:49:42,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:49:42,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:49:42,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:49:42,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 574 transitions, 9313 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:49:42,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:49:42,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:49:42,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:49:44,287 INFO L124 PetriNetUnfolderBase]: 4324/7171 cut-off events. [2024-06-27 20:49:44,287 INFO L125 PetriNetUnfolderBase]: For 927403/927407 co-relation queries the response was YES. [2024-06-27 20:49:44,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70691 conditions, 7171 events. 4324/7171 cut-off events. For 927403/927407 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 48118 event pairs, 915 based on Foata normal form. 6/7175 useless extension candidates. Maximal degree in co-relation 70529. Up to 6610 conditions per place. [2024-06-27 20:49:44,415 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 550 selfloop transitions, 35 changer transitions 0/590 dead transitions. [2024-06-27 20:49:44,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 590 transitions, 10649 flow [2024-06-27 20:49:44,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:49:44,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:49:44,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-27 20:49:44,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37202380952380953 [2024-06-27 20:49:44,416 INFO L175 Difference]: Start difference. First operand has 336 places, 574 transitions, 9313 flow. Second operand 8 states and 125 transitions. [2024-06-27 20:49:44,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 590 transitions, 10649 flow [2024-06-27 20:49:47,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 590 transitions, 10466 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-27 20:49:47,251 INFO L231 Difference]: Finished difference. Result has 340 places, 577 transitions, 9346 flow [2024-06-27 20:49:47,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9130, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=539, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9346, PETRI_PLACES=340, PETRI_TRANSITIONS=577} [2024-06-27 20:49:47,251 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 297 predicate places. [2024-06-27 20:49:47,251 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 577 transitions, 9346 flow [2024-06-27 20:49:47,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:49:47,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:49:47,252 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:49:47,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-27 20:49:47,252 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:49:47,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:49:47,253 INFO L85 PathProgramCache]: Analyzing trace with hash 864738451, now seen corresponding path program 4 times [2024-06-27 20:49:47,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:49:47,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24534934] [2024-06-27 20:49:47,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:49:47,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:49:47,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:49:49,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:49:49,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:49:49,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24534934] [2024-06-27 20:49:49,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24534934] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:49:49,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:49:49,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:49:49,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500053966] [2024-06-27 20:49:49,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:49:49,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:49:49,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:49:49,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:49:49,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:49:49,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:49:49,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 577 transitions, 9346 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:49:49,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:49:49,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:49:49,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:49:52,083 INFO L124 PetriNetUnfolderBase]: 4433/7281 cut-off events. [2024-06-27 20:49:52,083 INFO L125 PetriNetUnfolderBase]: For 984352/984369 co-relation queries the response was YES. [2024-06-27 20:49:52,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73196 conditions, 7281 events. 4433/7281 cut-off events. For 984352/984369 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 48312 event pairs, 789 based on Foata normal form. 7/7283 useless extension candidates. Maximal degree in co-relation 73033. Up to 5362 conditions per place. [2024-06-27 20:49:52,197 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 354 selfloop transitions, 278 changer transitions 0/637 dead transitions. [2024-06-27 20:49:52,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 637 transitions, 11621 flow [2024-06-27 20:49:52,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:49:52,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:49:52,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-27 20:49:52,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-27 20:49:52,198 INFO L175 Difference]: Start difference. First operand has 340 places, 577 transitions, 9346 flow. Second operand 9 states and 164 transitions. [2024-06-27 20:49:52,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 637 transitions, 11621 flow [2024-06-27 20:49:54,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 637 transitions, 11427 flow, removed 64 selfloop flow, removed 6 redundant places. [2024-06-27 20:49:54,536 INFO L231 Difference]: Finished difference. Result has 344 places, 603 transitions, 10568 flow [2024-06-27 20:49:54,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9152, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=577, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=257, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10568, PETRI_PLACES=344, PETRI_TRANSITIONS=603} [2024-06-27 20:49:54,536 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 301 predicate places. [2024-06-27 20:49:54,537 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 603 transitions, 10568 flow [2024-06-27 20:49:54,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:49:54,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:49:54,537 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:49:54,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-27 20:49:54,537 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:49:54,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:49:54,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1877243388, now seen corresponding path program 4 times [2024-06-27 20:49:54,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:49:54,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835715479] [2024-06-27 20:49:54,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:49:54,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:49:54,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:49:56,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:49:56,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:49:56,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835715479] [2024-06-27 20:49:56,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835715479] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:49:56,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:49:56,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:49:56,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307366226] [2024-06-27 20:49:56,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:49:56,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:49:56,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:49:56,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:49:56,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:49:56,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:49:56,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 603 transitions, 10568 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:49:56,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:49:56,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:49:56,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:49:59,302 INFO L124 PetriNetUnfolderBase]: 4418/7282 cut-off events. [2024-06-27 20:49:59,302 INFO L125 PetriNetUnfolderBase]: For 1004365/1004384 co-relation queries the response was YES. [2024-06-27 20:49:59,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74858 conditions, 7282 events. 4418/7282 cut-off events. For 1004365/1004384 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 48624 event pairs, 791 based on Foata normal form. 7/7284 useless extension candidates. Maximal degree in co-relation 74693. Up to 6565 conditions per place. [2024-06-27 20:49:59,420 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 563 selfloop transitions, 57 changer transitions 0/625 dead transitions. [2024-06-27 20:49:59,420 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 625 transitions, 11882 flow [2024-06-27 20:49:59,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:49:59,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:49:59,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-27 20:49:59,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-27 20:49:59,421 INFO L175 Difference]: Start difference. First operand has 344 places, 603 transitions, 10568 flow. Second operand 8 states and 132 transitions. [2024-06-27 20:49:59,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 625 transitions, 11882 flow [2024-06-27 20:50:02,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 625 transitions, 11350 flow, removed 92 selfloop flow, removed 6 redundant places. [2024-06-27 20:50:02,454 INFO L231 Difference]: Finished difference. Result has 346 places, 603 transitions, 10156 flow [2024-06-27 20:50:02,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10036, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=603, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=546, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10156, PETRI_PLACES=346, PETRI_TRANSITIONS=603} [2024-06-27 20:50:02,455 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 303 predicate places. [2024-06-27 20:50:02,455 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 603 transitions, 10156 flow [2024-06-27 20:50:02,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:02,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:50:02,456 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:50:02,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-27 20:50:02,456 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:50:02,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:50:02,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1877243171, now seen corresponding path program 5 times [2024-06-27 20:50:02,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:50:02,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807186120] [2024-06-27 20:50:02,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:50:02,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:50:02,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:50:04,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:50:04,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:50:04,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807186120] [2024-06-27 20:50:04,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807186120] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:50:04,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:50:04,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:50:04,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923526945] [2024-06-27 20:50:04,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:50:04,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:50:04,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:50:04,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:50:04,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:50:04,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:50:04,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 603 transitions, 10156 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:04,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:50:04,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:50:04,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:50:07,632 INFO L124 PetriNetUnfolderBase]: 4412/7250 cut-off events. [2024-06-27 20:50:07,632 INFO L125 PetriNetUnfolderBase]: For 1012027/1012042 co-relation queries the response was YES. [2024-06-27 20:50:07,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73727 conditions, 7250 events. 4412/7250 cut-off events. For 1012027/1012042 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 48137 event pairs, 866 based on Foata normal form. 4/7249 useless extension candidates. Maximal degree in co-relation 73561. Up to 5975 conditions per place. [2024-06-27 20:50:07,750 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 442 selfloop transitions, 192 changer transitions 0/639 dead transitions. [2024-06-27 20:50:07,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 639 transitions, 12127 flow [2024-06-27 20:50:07,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:50:07,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:50:07,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-27 20:50:07,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-27 20:50:07,752 INFO L175 Difference]: Start difference. First operand has 346 places, 603 transitions, 10156 flow. Second operand 8 states and 142 transitions. [2024-06-27 20:50:07,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 639 transitions, 12127 flow [2024-06-27 20:50:10,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 639 transitions, 11939 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-27 20:50:10,890 INFO L231 Difference]: Finished difference. Result has 349 places, 613 transitions, 10783 flow [2024-06-27 20:50:10,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9968, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=603, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10783, PETRI_PLACES=349, PETRI_TRANSITIONS=613} [2024-06-27 20:50:10,890 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 306 predicate places. [2024-06-27 20:50:10,890 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 613 transitions, 10783 flow [2024-06-27 20:50:10,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:10,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:50:10,891 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:50:10,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-27 20:50:10,891 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:50:10,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:50:10,891 INFO L85 PathProgramCache]: Analyzing trace with hash 2104994591, now seen corresponding path program 6 times [2024-06-27 20:50:10,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:50:10,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186770604] [2024-06-27 20:50:10,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:50:10,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:50:10,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:50:13,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:50:13,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:50:13,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186770604] [2024-06-27 20:50:13,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186770604] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:50:13,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:50:13,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:50:13,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531394004] [2024-06-27 20:50:13,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:50:13,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:50:13,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:50:13,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:50:13,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:50:13,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:50:13,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 613 transitions, 10783 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:13,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:50:13,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:50:13,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:50:15,597 INFO L124 PetriNetUnfolderBase]: 4403/7238 cut-off events. [2024-06-27 20:50:15,597 INFO L125 PetriNetUnfolderBase]: For 1026205/1026226 co-relation queries the response was YES. [2024-06-27 20:50:15,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74063 conditions, 7238 events. 4403/7238 cut-off events. For 1026205/1026226 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 48073 event pairs, 842 based on Foata normal form. 11/7244 useless extension candidates. Maximal degree in co-relation 73895. Up to 5991 conditions per place. [2024-06-27 20:50:15,718 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 453 selfloop transitions, 183 changer transitions 0/641 dead transitions. [2024-06-27 20:50:15,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 641 transitions, 12178 flow [2024-06-27 20:50:15,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:50:15,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:50:15,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-27 20:50:15,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-27 20:50:15,721 INFO L175 Difference]: Start difference. First operand has 349 places, 613 transitions, 10783 flow. Second operand 8 states and 143 transitions. [2024-06-27 20:50:15,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 641 transitions, 12178 flow [2024-06-27 20:50:18,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 641 transitions, 11671 flow, removed 149 selfloop flow, removed 4 redundant places. [2024-06-27 20:50:18,920 INFO L231 Difference]: Finished difference. Result has 353 places, 613 transitions, 10656 flow [2024-06-27 20:50:18,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10276, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=613, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10656, PETRI_PLACES=353, PETRI_TRANSITIONS=613} [2024-06-27 20:50:18,927 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 310 predicate places. [2024-06-27 20:50:18,927 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 613 transitions, 10656 flow [2024-06-27 20:50:18,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:18,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:50:18,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:50:18,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-27 20:50:18,927 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:50:18,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:50:18,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1551821305, now seen corresponding path program 7 times [2024-06-27 20:50:18,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:50:18,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034627094] [2024-06-27 20:50:18,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:50:18,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:50:18,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:50:21,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:50:21,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:50:21,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034627094] [2024-06-27 20:50:21,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034627094] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:50:21,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:50:21,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:50:21,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55686681] [2024-06-27 20:50:21,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:50:21,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:50:21,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:50:21,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:50:21,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:50:21,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:50:21,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 613 transitions, 10656 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:21,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:50:21,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:50:21,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:50:23,535 INFO L124 PetriNetUnfolderBase]: 4423/7305 cut-off events. [2024-06-27 20:50:23,535 INFO L125 PetriNetUnfolderBase]: For 1047355/1047357 co-relation queries the response was YES. [2024-06-27 20:50:23,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75126 conditions, 7305 events. 4423/7305 cut-off events. For 1047355/1047357 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 48943 event pairs, 914 based on Foata normal form. 4/7307 useless extension candidates. Maximal degree in co-relation 74956. Up to 6766 conditions per place. [2024-06-27 20:50:23,657 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 612 selfloop transitions, 21 changer transitions 0/638 dead transitions. [2024-06-27 20:50:23,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 638 transitions, 12156 flow [2024-06-27 20:50:23,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:50:23,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:50:23,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-27 20:50:23,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-27 20:50:23,658 INFO L175 Difference]: Start difference. First operand has 353 places, 613 transitions, 10656 flow. Second operand 8 states and 130 transitions. [2024-06-27 20:50:23,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 638 transitions, 12156 flow [2024-06-27 20:50:26,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 638 transitions, 11764 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-27 20:50:26,331 INFO L231 Difference]: Finished difference. Result has 354 places, 617 transitions, 10466 flow [2024-06-27 20:50:26,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10264, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=613, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=592, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10466, PETRI_PLACES=354, PETRI_TRANSITIONS=617} [2024-06-27 20:50:26,331 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 311 predicate places. [2024-06-27 20:50:26,331 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 617 transitions, 10466 flow [2024-06-27 20:50:26,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:26,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:50:26,332 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:50:26,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-27 20:50:26,332 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:50:26,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:50:26,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1835727696, now seen corresponding path program 5 times [2024-06-27 20:50:26,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:50:26,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424355516] [2024-06-27 20:50:26,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:50:26,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:50:26,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:50:28,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:50:28,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:50:28,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424355516] [2024-06-27 20:50:28,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424355516] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:50:28,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:50:28,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:50:28,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424797822] [2024-06-27 20:50:28,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:50:28,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:50:28,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:50:28,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:50:28,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:50:28,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:50:28,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 617 transitions, 10466 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:28,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:50:28,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:50:28,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:50:30,941 INFO L124 PetriNetUnfolderBase]: 4428/7304 cut-off events. [2024-06-27 20:50:30,941 INFO L125 PetriNetUnfolderBase]: For 1052471/1052492 co-relation queries the response was YES. [2024-06-27 20:50:31,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75193 conditions, 7304 events. 4428/7304 cut-off events. For 1052471/1052492 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 48813 event pairs, 784 based on Foata normal form. 9/7308 useless extension candidates. Maximal degree in co-relation 75022. Up to 6539 conditions per place. [2024-06-27 20:50:31,060 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 553 selfloop transitions, 80 changer transitions 0/638 dead transitions. [2024-06-27 20:50:31,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 638 transitions, 11870 flow [2024-06-27 20:50:31,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:50:31,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:50:31,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-27 20:50:31,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-27 20:50:31,063 INFO L175 Difference]: Start difference. First operand has 354 places, 617 transitions, 10466 flow. Second operand 8 states and 132 transitions. [2024-06-27 20:50:31,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 638 transitions, 11870 flow [2024-06-27 20:50:33,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 638 transitions, 11720 flow, removed 57 selfloop flow, removed 6 redundant places. [2024-06-27 20:50:33,764 INFO L231 Difference]: Finished difference. Result has 356 places, 620 transitions, 10568 flow [2024-06-27 20:50:33,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10316, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=617, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=537, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10568, PETRI_PLACES=356, PETRI_TRANSITIONS=620} [2024-06-27 20:50:33,767 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 313 predicate places. [2024-06-27 20:50:33,768 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 620 transitions, 10568 flow [2024-06-27 20:50:33,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:33,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:50:33,768 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:50:33,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-27 20:50:33,768 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:50:33,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:50:33,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1407930775, now seen corresponding path program 8 times [2024-06-27 20:50:33,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:50:33,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503679459] [2024-06-27 20:50:33,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:50:33,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:50:33,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:50:36,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:50:36,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:50:36,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503679459] [2024-06-27 20:50:36,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503679459] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:50:36,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:50:36,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:50:36,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317557908] [2024-06-27 20:50:36,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:50:36,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:50:36,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:50:36,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:50:36,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:50:36,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:50:36,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 620 transitions, 10568 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:36,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:50:36,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:50:36,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:50:38,886 INFO L124 PetriNetUnfolderBase]: 4438/7333 cut-off events. [2024-06-27 20:50:38,886 INFO L125 PetriNetUnfolderBase]: For 1076341/1076343 co-relation queries the response was YES. [2024-06-27 20:50:38,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75642 conditions, 7333 events. 4438/7333 cut-off events. For 1076341/1076343 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 49147 event pairs, 922 based on Foata normal form. 2/7333 useless extension candidates. Maximal degree in co-relation 75470. Up to 6784 conditions per place. [2024-06-27 20:50:39,005 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 607 selfloop transitions, 28 changer transitions 0/640 dead transitions. [2024-06-27 20:50:39,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 640 transitions, 12030 flow [2024-06-27 20:50:39,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:50:39,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:50:39,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-27 20:50:39,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-27 20:50:39,007 INFO L175 Difference]: Start difference. First operand has 356 places, 620 transitions, 10568 flow. Second operand 8 states and 128 transitions. [2024-06-27 20:50:39,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 640 transitions, 12030 flow [2024-06-27 20:50:42,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 640 transitions, 11810 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-27 20:50:42,253 INFO L231 Difference]: Finished difference. Result has 358 places, 624 transitions, 10570 flow [2024-06-27 20:50:42,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10348, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=620, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=592, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10570, PETRI_PLACES=358, PETRI_TRANSITIONS=624} [2024-06-27 20:50:42,254 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 315 predicate places. [2024-06-27 20:50:42,254 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 624 transitions, 10570 flow [2024-06-27 20:50:42,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:42,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:50:42,254 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:50:42,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-27 20:50:42,254 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:50:42,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:50:42,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1408167925, now seen corresponding path program 9 times [2024-06-27 20:50:42,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:50:42,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932721264] [2024-06-27 20:50:42,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:50:42,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:50:42,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:50:44,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:50:44,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:50:44,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932721264] [2024-06-27 20:50:44,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932721264] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:50:44,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:50:44,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:50:44,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984205763] [2024-06-27 20:50:44,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:50:44,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:50:44,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:50:44,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:50:44,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:50:44,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:50:44,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 624 transitions, 10570 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:44,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:50:44,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:50:44,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:50:47,177 INFO L124 PetriNetUnfolderBase]: 4443/7336 cut-off events. [2024-06-27 20:50:47,177 INFO L125 PetriNetUnfolderBase]: For 1100129/1100131 co-relation queries the response was YES. [2024-06-27 20:50:47,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76168 conditions, 7336 events. 4443/7336 cut-off events. For 1100129/1100131 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 49073 event pairs, 916 based on Foata normal form. 1/7335 useless extension candidates. Maximal degree in co-relation 75995. Up to 6779 conditions per place. [2024-06-27 20:50:47,286 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 605 selfloop transitions, 37 changer transitions 0/647 dead transitions. [2024-06-27 20:50:47,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 647 transitions, 12098 flow [2024-06-27 20:50:47,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:50:47,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:50:47,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-27 20:50:47,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-27 20:50:47,287 INFO L175 Difference]: Start difference. First operand has 358 places, 624 transitions, 10570 flow. Second operand 8 states and 128 transitions. [2024-06-27 20:50:47,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 647 transitions, 12098 flow [2024-06-27 20:50:50,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 647 transitions, 11906 flow, removed 71 selfloop flow, removed 6 redundant places. [2024-06-27 20:50:50,366 INFO L231 Difference]: Finished difference. Result has 361 places, 631 transitions, 10688 flow [2024-06-27 20:50:50,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10378, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=624, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=588, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10688, PETRI_PLACES=361, PETRI_TRANSITIONS=631} [2024-06-27 20:50:50,367 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 318 predicate places. [2024-06-27 20:50:50,367 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 631 transitions, 10688 flow [2024-06-27 20:50:50,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:50,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:50:50,367 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:50:50,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-27 20:50:50,368 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:50:50,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:50:50,368 INFO L85 PathProgramCache]: Analyzing trace with hash -559572094, now seen corresponding path program 6 times [2024-06-27 20:50:50,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:50:50,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811020440] [2024-06-27 20:50:50,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:50:50,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:50:50,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:50:53,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:50:53,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:50:53,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811020440] [2024-06-27 20:50:53,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811020440] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:50:53,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:50:53,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:50:53,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434799927] [2024-06-27 20:50:53,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:50:53,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:50:53,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:50:53,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:50:53,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:50:53,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:50:53,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 631 transitions, 10688 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:53,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:50:53,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:50:53,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:50:55,574 INFO L124 PetriNetUnfolderBase]: 4445/7340 cut-off events. [2024-06-27 20:50:55,574 INFO L125 PetriNetUnfolderBase]: For 1121885/1121889 co-relation queries the response was YES. [2024-06-27 20:50:55,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76458 conditions, 7340 events. 4445/7340 cut-off events. For 1121885/1121889 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 49155 event pairs, 921 based on Foata normal form. 4/7342 useless extension candidates. Maximal degree in co-relation 76283. Up to 6753 conditions per place. [2024-06-27 20:50:55,892 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 595 selfloop transitions, 48 changer transitions 0/648 dead transitions. [2024-06-27 20:50:55,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 648 transitions, 12292 flow [2024-06-27 20:50:55,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:50:55,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:50:55,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-27 20:50:55,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37037037037037035 [2024-06-27 20:50:55,894 INFO L175 Difference]: Start difference. First operand has 361 places, 631 transitions, 10688 flow. Second operand 9 states and 140 transitions. [2024-06-27 20:50:55,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 648 transitions, 12292 flow [2024-06-27 20:50:58,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 648 transitions, 12081 flow, removed 92 selfloop flow, removed 4 redundant places. [2024-06-27 20:50:58,862 INFO L231 Difference]: Finished difference. Result has 366 places, 634 transitions, 10669 flow [2024-06-27 20:50:58,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10477, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=631, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=585, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10669, PETRI_PLACES=366, PETRI_TRANSITIONS=634} [2024-06-27 20:50:58,863 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 323 predicate places. [2024-06-27 20:50:58,863 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 634 transitions, 10669 flow [2024-06-27 20:50:58,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:58,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:50:58,863 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:50:58,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-27 20:50:58,863 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:50:58,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:50:58,865 INFO L85 PathProgramCache]: Analyzing trace with hash 133151547, now seen corresponding path program 10 times [2024-06-27 20:50:58,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:50:58,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603165163] [2024-06-27 20:50:58,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:50:58,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:50:58,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:51:01,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:51:01,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:51:01,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603165163] [2024-06-27 20:51:01,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603165163] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:51:01,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:51:01,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:51:01,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740233726] [2024-06-27 20:51:01,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:51:01,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:51:01,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:51:01,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:51:01,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:51:01,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:51:01,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 634 transitions, 10669 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:51:01,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:51:01,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:51:01,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:51:03,689 INFO L124 PetriNetUnfolderBase]: 4471/7375 cut-off events. [2024-06-27 20:51:03,690 INFO L125 PetriNetUnfolderBase]: For 1154600/1154604 co-relation queries the response was YES. [2024-06-27 20:51:03,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77388 conditions, 7375 events. 4471/7375 cut-off events. For 1154600/1154604 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 49372 event pairs, 924 based on Foata normal form. 4/7377 useless extension candidates. Maximal degree in co-relation 77211. Up to 6744 conditions per place. [2024-06-27 20:51:03,839 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 593 selfloop transitions, 58 changer transitions 0/656 dead transitions. [2024-06-27 20:51:03,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 656 transitions, 12557 flow [2024-06-27 20:51:03,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:51:03,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:51:03,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-27 20:51:03,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-27 20:51:03,840 INFO L175 Difference]: Start difference. First operand has 366 places, 634 transitions, 10669 flow. Second operand 8 states and 131 transitions. [2024-06-27 20:51:03,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 656 transitions, 12557 flow [2024-06-27 20:51:07,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 656 transitions, 12372 flow, removed 54 selfloop flow, removed 7 redundant places. [2024-06-27 20:51:07,426 INFO L231 Difference]: Finished difference. Result has 368 places, 642 transitions, 10933 flow [2024-06-27 20:51:07,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10484, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=634, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=579, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10933, PETRI_PLACES=368, PETRI_TRANSITIONS=642} [2024-06-27 20:51:07,426 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 325 predicate places. [2024-06-27 20:51:07,426 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 642 transitions, 10933 flow [2024-06-27 20:51:07,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:51:07,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:51:07,427 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:51:07,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-27 20:51:07,427 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:51:07,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:51:07,427 INFO L85 PathProgramCache]: Analyzing trace with hash -555197591, now seen corresponding path program 11 times [2024-06-27 20:51:07,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:51:07,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300721149] [2024-06-27 20:51:07,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:51:07,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:51:07,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:51:09,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:51:09,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:51:09,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300721149] [2024-06-27 20:51:09,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300721149] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:51:09,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:51:09,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:51:09,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85829148] [2024-06-27 20:51:09,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:51:09,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:51:09,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:51:09,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:51:09,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:51:09,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:51:09,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 642 transitions, 10933 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:51:09,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:51:09,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:51:09,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:51:12,170 INFO L124 PetriNetUnfolderBase]: 4476/7382 cut-off events. [2024-06-27 20:51:12,170 INFO L125 PetriNetUnfolderBase]: For 1180646/1180650 co-relation queries the response was YES. [2024-06-27 20:51:12,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78461 conditions, 7382 events. 4476/7382 cut-off events. For 1180646/1180650 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 49374 event pairs, 924 based on Foata normal form. 3/7383 useless extension candidates. Maximal degree in co-relation 78283. Up to 6817 conditions per place. [2024-06-27 20:51:12,294 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 615 selfloop transitions, 42 changer transitions 0/662 dead transitions. [2024-06-27 20:51:12,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 662 transitions, 12802 flow [2024-06-27 20:51:12,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:51:12,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:51:12,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-27 20:51:12,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38392857142857145 [2024-06-27 20:51:12,296 INFO L175 Difference]: Start difference. First operand has 368 places, 642 transitions, 10933 flow. Second operand 8 states and 129 transitions. [2024-06-27 20:51:12,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 662 transitions, 12802 flow [2024-06-27 20:51:14,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 662 transitions, 12487 flow, removed 137 selfloop flow, removed 4 redundant places. [2024-06-27 20:51:14,715 INFO L231 Difference]: Finished difference. Result has 373 places, 649 transitions, 11045 flow [2024-06-27 20:51:14,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10684, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=642, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=603, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11045, PETRI_PLACES=373, PETRI_TRANSITIONS=649} [2024-06-27 20:51:14,716 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 330 predicate places. [2024-06-27 20:51:14,716 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 649 transitions, 11045 flow [2024-06-27 20:51:14,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:51:14,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:51:14,716 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:51:14,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-27 20:51:14,717 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:51:14,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:51:14,717 INFO L85 PathProgramCache]: Analyzing trace with hash -382262014, now seen corresponding path program 7 times [2024-06-27 20:51:14,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:51:14,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963105226] [2024-06-27 20:51:14,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:51:14,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:51:14,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:51:16,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:51:16,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:51:16,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963105226] [2024-06-27 20:51:16,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963105226] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:51:16,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:51:16,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:51:16,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015953048] [2024-06-27 20:51:16,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:51:16,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:51:16,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:51:16,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:51:16,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:51:17,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:51:17,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 649 transitions, 11045 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:51:17,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:51:17,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:51:17,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:51:19,599 INFO L124 PetriNetUnfolderBase]: 4481/7391 cut-off events. [2024-06-27 20:51:19,599 INFO L125 PetriNetUnfolderBase]: For 1196805/1196849 co-relation queries the response was YES. [2024-06-27 20:51:19,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78464 conditions, 7391 events. 4481/7391 cut-off events. For 1196805/1196849 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 49462 event pairs, 817 based on Foata normal form. 25/7411 useless extension candidates. Maximal degree in co-relation 78283. Up to 6538 conditions per place. [2024-06-27 20:51:19,744 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 555 selfloop transitions, 105 changer transitions 0/665 dead transitions. [2024-06-27 20:51:19,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 665 transitions, 12489 flow [2024-06-27 20:51:19,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:51:19,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:51:19,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-27 20:51:19,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38392857142857145 [2024-06-27 20:51:19,746 INFO L175 Difference]: Start difference. First operand has 373 places, 649 transitions, 11045 flow. Second operand 8 states and 129 transitions. [2024-06-27 20:51:19,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 665 transitions, 12489 flow [2024-06-27 20:51:24,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 665 transitions, 12328 flow, removed 62 selfloop flow, removed 4 redundant places. [2024-06-27 20:51:24,083 INFO L231 Difference]: Finished difference. Result has 377 places, 652 transitions, 11192 flow [2024-06-27 20:51:24,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10884, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=649, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=544, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11192, PETRI_PLACES=377, PETRI_TRANSITIONS=652} [2024-06-27 20:51:24,084 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 334 predicate places. [2024-06-27 20:51:24,084 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 652 transitions, 11192 flow [2024-06-27 20:51:24,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:51:24,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:51:24,085 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:51:24,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-27 20:51:24,085 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:51:24,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:51:24,086 INFO L85 PathProgramCache]: Analyzing trace with hash 2079663710, now seen corresponding path program 8 times [2024-06-27 20:51:24,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:51:24,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895851044] [2024-06-27 20:51:24,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:51:24,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:51:24,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:51:26,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:51:26,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:51:26,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895851044] [2024-06-27 20:51:26,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895851044] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:51:26,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:51:26,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:51:26,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269481732] [2024-06-27 20:51:26,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:51:26,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:51:26,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:51:26,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:51:26,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:51:26,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:51:26,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 652 transitions, 11192 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:51:26,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:51:26,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:51:26,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:51:28,884 INFO L124 PetriNetUnfolderBase]: 4486/7399 cut-off events. [2024-06-27 20:51:28,884 INFO L125 PetriNetUnfolderBase]: For 1217453/1217457 co-relation queries the response was YES. [2024-06-27 20:51:28,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79000 conditions, 7399 events. 4486/7399 cut-off events. For 1217453/1217457 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 49577 event pairs, 921 based on Foata normal form. 3/7400 useless extension candidates. Maximal degree in co-relation 78817. Up to 6829 conditions per place. [2024-06-27 20:51:29,008 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 621 selfloop transitions, 42 changer transitions 0/668 dead transitions. [2024-06-27 20:51:29,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 668 transitions, 12850 flow [2024-06-27 20:51:29,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:51:29,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:51:29,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-27 20:51:29,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37797619047619047 [2024-06-27 20:51:29,010 INFO L175 Difference]: Start difference. First operand has 377 places, 652 transitions, 11192 flow. Second operand 8 states and 127 transitions. [2024-06-27 20:51:29,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 668 transitions, 12850 flow [2024-06-27 20:51:33,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 668 transitions, 12572 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-27 20:51:33,172 INFO L231 Difference]: Finished difference. Result has 379 places, 655 transitions, 11096 flow [2024-06-27 20:51:33,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10914, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=652, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=613, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11096, PETRI_PLACES=379, PETRI_TRANSITIONS=655} [2024-06-27 20:51:33,173 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 336 predicate places. [2024-06-27 20:51:33,173 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 655 transitions, 11096 flow [2024-06-27 20:51:33,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:51:33,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:51:33,173 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:51:33,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-27 20:51:33,174 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:51:33,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:51:33,174 INFO L85 PathProgramCache]: Analyzing trace with hash 561515344, now seen corresponding path program 9 times [2024-06-27 20:51:33,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:51:33,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828117848] [2024-06-27 20:51:33,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:51:33,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:51:33,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:51:35,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:51:35,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:51:35,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828117848] [2024-06-27 20:51:35,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828117848] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:51:35,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:51:35,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:51:35,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122874090] [2024-06-27 20:51:35,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:51:35,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:51:35,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:51:35,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:51:35,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:51:35,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:51:35,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 655 transitions, 11096 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:51:35,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:51:35,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:51:35,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:51:38,257 INFO L124 PetriNetUnfolderBase]: 4478/7383 cut-off events. [2024-06-27 20:51:38,257 INFO L125 PetriNetUnfolderBase]: For 1230107/1230111 co-relation queries the response was YES. [2024-06-27 20:51:38,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78541 conditions, 7383 events. 4478/7383 cut-off events. For 1230107/1230111 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 49392 event pairs, 919 based on Foata normal form. 4/7385 useless extension candidates. Maximal degree in co-relation 78357. Up to 6821 conditions per place. [2024-06-27 20:51:38,385 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 619 selfloop transitions, 43 changer transitions 0/667 dead transitions. [2024-06-27 20:51:38,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 667 transitions, 12450 flow [2024-06-27 20:51:38,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:51:38,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:51:38,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-27 20:51:38,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37202380952380953 [2024-06-27 20:51:38,387 INFO L175 Difference]: Start difference. First operand has 379 places, 655 transitions, 11096 flow. Second operand 8 states and 125 transitions. [2024-06-27 20:51:38,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 667 transitions, 12450 flow [2024-06-27 20:51:42,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 667 transitions, 12224 flow, removed 78 selfloop flow, removed 5 redundant places. [2024-06-27 20:51:42,433 INFO L231 Difference]: Finished difference. Result has 382 places, 655 transitions, 10964 flow [2024-06-27 20:51:42,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10870, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=655, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=612, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10964, PETRI_PLACES=382, PETRI_TRANSITIONS=655} [2024-06-27 20:51:42,434 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 339 predicate places. [2024-06-27 20:51:42,434 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 655 transitions, 10964 flow [2024-06-27 20:51:42,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:51:42,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:51:42,434 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:51:42,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-27 20:51:42,434 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:51:42,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:51:42,435 INFO L85 PathProgramCache]: Analyzing trace with hash 310283284, now seen corresponding path program 10 times [2024-06-27 20:51:42,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:51:42,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849380594] [2024-06-27 20:51:42,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:51:42,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:51:42,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:51:45,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:51:45,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:51:45,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849380594] [2024-06-27 20:51:45,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849380594] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:51:45,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:51:45,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:51:45,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351496535] [2024-06-27 20:51:45,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:51:45,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:51:45,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:51:45,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:51:45,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:51:45,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:51:45,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 655 transitions, 10964 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:51:45,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:51:45,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:51:45,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:51:47,435 INFO L124 PetriNetUnfolderBase]: 4473/7379 cut-off events. [2024-06-27 20:51:47,436 INFO L125 PetriNetUnfolderBase]: For 1233353/1233357 co-relation queries the response was YES. [2024-06-27 20:51:47,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78397 conditions, 7379 events. 4473/7379 cut-off events. For 1233353/1233357 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 49396 event pairs, 925 based on Foata normal form. 3/7380 useless extension candidates. Maximal degree in co-relation 78212. Up to 6850 conditions per place. [2024-06-27 20:51:47,570 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 639 selfloop transitions, 23 changer transitions 0/667 dead transitions. [2024-06-27 20:51:47,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 667 transitions, 12318 flow [2024-06-27 20:51:47,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:51:47,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:51:47,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-27 20:51:47,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3601190476190476 [2024-06-27 20:51:47,572 INFO L175 Difference]: Start difference. First operand has 382 places, 655 transitions, 10964 flow. Second operand 8 states and 121 transitions. [2024-06-27 20:51:47,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 667 transitions, 12318 flow [2024-06-27 20:51:51,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 667 transitions, 12156 flow, removed 26 selfloop flow, removed 8 redundant places. [2024-06-27 20:51:51,971 INFO L231 Difference]: Finished difference. Result has 382 places, 655 transitions, 10854 flow [2024-06-27 20:51:51,972 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10802, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=655, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=632, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10854, PETRI_PLACES=382, PETRI_TRANSITIONS=655} [2024-06-27 20:51:51,972 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 339 predicate places. [2024-06-27 20:51:51,972 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 655 transitions, 10854 flow [2024-06-27 20:51:51,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:51:51,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:51:51,983 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:51:51,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-27 20:51:51,983 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:51:51,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:51:51,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1928959505, now seen corresponding path program 12 times [2024-06-27 20:51:51,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:51:51,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019182689] [2024-06-27 20:51:51,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:51:51,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:51:51,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:51:54,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:51:54,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:51:54,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019182689] [2024-06-27 20:51:54,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019182689] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:51:54,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:51:54,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:51:54,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109471278] [2024-06-27 20:51:54,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:51:54,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:51:54,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:51:54,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:51:54,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:51:54,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:51:54,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 655 transitions, 10854 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:51:54,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:51:54,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:51:54,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:51:56,824 INFO L124 PetriNetUnfolderBase]: 4467/7372 cut-off events. [2024-06-27 20:51:56,824 INFO L125 PetriNetUnfolderBase]: For 1251960/1251964 co-relation queries the response was YES. [2024-06-27 20:51:56,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78152 conditions, 7372 events. 4467/7372 cut-off events. For 1251960/1251964 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 49356 event pairs, 926 based on Foata normal form. 4/7374 useless extension candidates. Maximal degree in co-relation 77966. Up to 6813 conditions per place. [2024-06-27 20:51:56,958 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 625 selfloop transitions, 37 changer transitions 0/667 dead transitions. [2024-06-27 20:51:56,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 667 transitions, 12208 flow [2024-06-27 20:51:56,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:51:56,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:51:56,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-27 20:51:56,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-27 20:51:56,960 INFO L175 Difference]: Start difference. First operand has 382 places, 655 transitions, 10854 flow. Second operand 8 states and 126 transitions. [2024-06-27 20:51:56,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 667 transitions, 12208 flow [2024-06-27 20:52:01,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 667 transitions, 12028 flow, removed 56 selfloop flow, removed 7 redundant places. [2024-06-27 20:52:01,226 INFO L231 Difference]: Finished difference. Result has 383 places, 655 transitions, 10756 flow [2024-06-27 20:52:01,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10674, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=655, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=618, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10756, PETRI_PLACES=383, PETRI_TRANSITIONS=655} [2024-06-27 20:52:01,226 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 340 predicate places. [2024-06-27 20:52:01,227 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 655 transitions, 10756 flow [2024-06-27 20:52:01,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:52:01,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:52:01,227 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:52:01,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-27 20:52:01,227 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:52:01,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:52:01,228 INFO L85 PathProgramCache]: Analyzing trace with hash -116733839, now seen corresponding path program 5 times [2024-06-27 20:52:01,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:52:01,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168403877] [2024-06-27 20:52:01,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:52:01,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:52:01,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:52:03,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:52:03,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:52:03,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168403877] [2024-06-27 20:52:03,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168403877] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:52:03,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:52:03,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:52:03,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351841261] [2024-06-27 20:52:03,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:52:03,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:52:03,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:52:03,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:52:03,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:52:03,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:52:03,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 655 transitions, 10756 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:52:03,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:52:03,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:52:03,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:52:06,744 INFO L124 PetriNetUnfolderBase]: 4665/7686 cut-off events. [2024-06-27 20:52:06,745 INFO L125 PetriNetUnfolderBase]: For 1488355/1488399 co-relation queries the response was YES. [2024-06-27 20:52:06,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85211 conditions, 7686 events. 4665/7686 cut-off events. For 1488355/1488399 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 51690 event pairs, 840 based on Foata normal form. 36/7717 useless extension candidates. Maximal degree in co-relation 85024. Up to 5868 conditions per place. [2024-06-27 20:52:06,872 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 519 selfloop transitions, 164 changer transitions 0/688 dead transitions. [2024-06-27 20:52:06,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 688 transitions, 13128 flow [2024-06-27 20:52:06,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:52:06,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:52:06,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-27 20:52:06,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4021164021164021 [2024-06-27 20:52:06,874 INFO L175 Difference]: Start difference. First operand has 383 places, 655 transitions, 10756 flow. Second operand 9 states and 152 transitions. [2024-06-27 20:52:06,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 688 transitions, 13128 flow [2024-06-27 20:52:10,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 688 transitions, 13046 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-27 20:52:10,685 INFO L231 Difference]: Finished difference. Result has 386 places, 660 transitions, 11286 flow [2024-06-27 20:52:10,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10674, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=655, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=493, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11286, PETRI_PLACES=386, PETRI_TRANSITIONS=660} [2024-06-27 20:52:10,686 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 343 predicate places. [2024-06-27 20:52:10,686 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 660 transitions, 11286 flow [2024-06-27 20:52:10,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:52:10,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:52:10,686 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:52:10,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-27 20:52:10,687 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:52:10,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:52:10,687 INFO L85 PathProgramCache]: Analyzing trace with hash 133040319, now seen corresponding path program 6 times [2024-06-27 20:52:10,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:52:10,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125560666] [2024-06-27 20:52:10,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:52:10,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:52:10,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:52:14,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:52:14,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:52:14,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125560666] [2024-06-27 20:52:14,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125560666] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:52:14,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:52:14,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:52:14,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118459754] [2024-06-27 20:52:14,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:52:14,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:52:14,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:52:14,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:52:14,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:52:14,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:52:14,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 660 transitions, 11286 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:52:14,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:52:14,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:52:14,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:52:16,782 INFO L124 PetriNetUnfolderBase]: 4721/7779 cut-off events. [2024-06-27 20:52:16,783 INFO L125 PetriNetUnfolderBase]: For 1561806/1561810 co-relation queries the response was YES. [2024-06-27 20:52:16,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87563 conditions, 7779 events. 4721/7779 cut-off events. For 1561806/1561810 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 52564 event pairs, 991 based on Foata normal form. 18/7795 useless extension candidates. Maximal degree in co-relation 87374. Up to 7135 conditions per place. [2024-06-27 20:52:16,913 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 633 selfloop transitions, 41 changer transitions 0/679 dead transitions. [2024-06-27 20:52:16,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 679 transitions, 12846 flow [2024-06-27 20:52:16,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:52:16,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:52:16,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-27 20:52:16,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.373015873015873 [2024-06-27 20:52:16,915 INFO L175 Difference]: Start difference. First operand has 386 places, 660 transitions, 11286 flow. Second operand 9 states and 141 transitions. [2024-06-27 20:52:16,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 679 transitions, 12846 flow [2024-06-27 20:52:22,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 679 transitions, 12553 flow, removed 55 selfloop flow, removed 4 redundant places. [2024-06-27 20:52:22,180 INFO L231 Difference]: Finished difference. Result has 391 places, 662 transitions, 11199 flow [2024-06-27 20:52:22,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10995, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=660, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=619, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11199, PETRI_PLACES=391, PETRI_TRANSITIONS=662} [2024-06-27 20:52:22,181 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 348 predicate places. [2024-06-27 20:52:22,181 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 662 transitions, 11199 flow [2024-06-27 20:52:22,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:52:22,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:52:22,181 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:52:22,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-27 20:52:22,181 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:52:22,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:52:22,182 INFO L85 PathProgramCache]: Analyzing trace with hash 561524799, now seen corresponding path program 7 times [2024-06-27 20:52:22,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:52:22,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859827920] [2024-06-27 20:52:22,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:52:22,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:52:22,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:52:24,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:52:24,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:52:24,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859827920] [2024-06-27 20:52:24,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859827920] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:52:24,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:52:24,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:52:24,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053316046] [2024-06-27 20:52:24,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:52:24,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:52:24,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:52:24,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:52:24,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:52:24,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:52:24,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 662 transitions, 11199 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:52:24,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:52:24,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:52:24,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:52:27,716 INFO L124 PetriNetUnfolderBase]: 4768/7861 cut-off events. [2024-06-27 20:52:27,717 INFO L125 PetriNetUnfolderBase]: For 1571826/1571870 co-relation queries the response was YES. [2024-06-27 20:52:27,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88286 conditions, 7861 events. 4768/7861 cut-off events. For 1571826/1571870 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 53210 event pairs, 889 based on Foata normal form. 36/7892 useless extension candidates. Maximal degree in co-relation 88095. Up to 6641 conditions per place. [2024-06-27 20:52:27,858 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 528 selfloop transitions, 155 changer transitions 0/688 dead transitions. [2024-06-27 20:52:27,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 688 transitions, 13177 flow [2024-06-27 20:52:27,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:52:27,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:52:27,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-27 20:52:27,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3941798941798942 [2024-06-27 20:52:27,859 INFO L175 Difference]: Start difference. First operand has 391 places, 662 transitions, 11199 flow. Second operand 9 states and 149 transitions. [2024-06-27 20:52:27,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 688 transitions, 13177 flow [2024-06-27 20:52:32,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 688 transitions, 13039 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-27 20:52:32,478 INFO L231 Difference]: Finished difference. Result has 394 places, 665 transitions, 11575 flow [2024-06-27 20:52:32,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11061, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=662, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=508, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11575, PETRI_PLACES=394, PETRI_TRANSITIONS=665} [2024-06-27 20:52:32,479 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 351 predicate places. [2024-06-27 20:52:32,479 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 665 transitions, 11575 flow [2024-06-27 20:52:32,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:52:32,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:52:32,479 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:52:32,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-27 20:52:32,479 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:52:32,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:52:32,480 INFO L85 PathProgramCache]: Analyzing trace with hash 561511779, now seen corresponding path program 8 times [2024-06-27 20:52:32,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:52:32,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100130638] [2024-06-27 20:52:32,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:52:32,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:52:32,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:52:35,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:52:35,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:52:35,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100130638] [2024-06-27 20:52:35,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100130638] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:52:35,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:52:35,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:52:35,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544435843] [2024-06-27 20:52:35,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:52:35,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:52:35,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:52:35,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:52:35,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:52:35,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:52:35,113 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 665 transitions, 11575 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:52:35,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:52:35,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:52:35,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:52:38,145 INFO L124 PetriNetUnfolderBase]: 4778/7879 cut-off events. [2024-06-27 20:52:38,146 INFO L125 PetriNetUnfolderBase]: For 1575363/1575407 co-relation queries the response was YES. [2024-06-27 20:52:38,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87959 conditions, 7879 events. 4778/7879 cut-off events. For 1575363/1575407 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 53347 event pairs, 900 based on Foata normal form. 40/7914 useless extension candidates. Maximal degree in co-relation 87766. Up to 6817 conditions per place. [2024-06-27 20:52:38,274 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 522 selfloop transitions, 158 changer transitions 0/685 dead transitions. [2024-06-27 20:52:38,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 685 transitions, 13160 flow [2024-06-27 20:52:38,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:52:38,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:52:38,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-27 20:52:38,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3862433862433862 [2024-06-27 20:52:38,275 INFO L175 Difference]: Start difference. First operand has 394 places, 665 transitions, 11575 flow. Second operand 9 states and 146 transitions. [2024-06-27 20:52:38,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 685 transitions, 13160 flow [2024-06-27 20:52:43,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 685 transitions, 12639 flow, removed 54 selfloop flow, removed 8 redundant places. [2024-06-27 20:52:43,210 INFO L231 Difference]: Finished difference. Result has 395 places, 667 transitions, 11495 flow [2024-06-27 20:52:43,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11058, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=665, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=507, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11495, PETRI_PLACES=395, PETRI_TRANSITIONS=667} [2024-06-27 20:52:43,210 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 352 predicate places. [2024-06-27 20:52:43,210 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 667 transitions, 11495 flow [2024-06-27 20:52:43,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:52:43,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:52:43,211 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:52:43,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-27 20:52:43,211 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:52:43,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:52:43,211 INFO L85 PathProgramCache]: Analyzing trace with hash -559562639, now seen corresponding path program 9 times [2024-06-27 20:52:43,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:52:43,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129768324] [2024-06-27 20:52:43,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:52:43,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:52:43,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:52:46,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:52:46,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:52:46,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129768324] [2024-06-27 20:52:46,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129768324] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:52:46,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:52:46,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:52:46,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194723026] [2024-06-27 20:52:46,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:52:46,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:52:46,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:52:46,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:52:46,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:52:46,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:52:46,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 667 transitions, 11495 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:52:46,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:52:46,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:52:46,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:52:49,379 INFO L124 PetriNetUnfolderBase]: 4891/8065 cut-off events. [2024-06-27 20:52:49,380 INFO L125 PetriNetUnfolderBase]: For 1656831/1656835 co-relation queries the response was YES. [2024-06-27 20:52:49,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91000 conditions, 8065 events. 4891/8065 cut-off events. For 1656831/1656835 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 54830 event pairs, 1034 based on Foata normal form. 14/8077 useless extension candidates. Maximal degree in co-relation 90807. Up to 7154 conditions per place. [2024-06-27 20:52:49,511 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 641 selfloop transitions, 47 changer transitions 0/693 dead transitions. [2024-06-27 20:52:49,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 693 transitions, 13537 flow [2024-06-27 20:52:49,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:52:49,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:52:49,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-27 20:52:49,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-27 20:52:49,513 INFO L175 Difference]: Start difference. First operand has 395 places, 667 transitions, 11495 flow. Second operand 9 states and 144 transitions. [2024-06-27 20:52:49,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 693 transitions, 13537 flow [2024-06-27 20:52:53,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 693 transitions, 13157 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-06-27 20:52:53,997 INFO L231 Difference]: Finished difference. Result has 398 places, 671 transitions, 11471 flow [2024-06-27 20:52:53,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11115, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=667, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=621, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11471, PETRI_PLACES=398, PETRI_TRANSITIONS=671} [2024-06-27 20:52:53,998 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 355 predicate places. [2024-06-27 20:52:53,998 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 671 transitions, 11471 flow [2024-06-27 20:52:53,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:52:53,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:52:54,000 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:52:54,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-27 20:52:54,000 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:52:54,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:52:54,000 INFO L85 PathProgramCache]: Analyzing trace with hash -559575659, now seen corresponding path program 10 times [2024-06-27 20:52:54,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:52:54,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057546283] [2024-06-27 20:52:54,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:52:54,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:52:54,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:52:57,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:52:57,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:52:57,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057546283] [2024-06-27 20:52:57,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057546283] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:52:57,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:52:57,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:52:57,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301118717] [2024-06-27 20:52:57,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:52:57,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:52:57,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:52:57,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:52:57,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:52:57,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:52:57,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 671 transitions, 11471 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:52:57,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:52:57,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:52:57,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:53:01,465 INFO L124 PetriNetUnfolderBase]: 4901/8083 cut-off events. [2024-06-27 20:53:01,466 INFO L125 PetriNetUnfolderBase]: For 1659524/1659528 co-relation queries the response was YES. [2024-06-27 20:53:01,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89859 conditions, 8083 events. 4901/8083 cut-off events. For 1659524/1659528 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 54957 event pairs, 1045 based on Foata normal form. 18/8099 useless extension candidates. Maximal degree in co-relation 89664. Up to 7332 conditions per place. [2024-06-27 20:53:01,617 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 627 selfloop transitions, 59 changer transitions 0/691 dead transitions. [2024-06-27 20:53:01,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 691 transitions, 13068 flow [2024-06-27 20:53:01,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:53:01,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:53:01,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 155 transitions. [2024-06-27 20:53:01,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36904761904761907 [2024-06-27 20:53:01,619 INFO L175 Difference]: Start difference. First operand has 398 places, 671 transitions, 11471 flow. Second operand 10 states and 155 transitions. [2024-06-27 20:53:01,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 691 transitions, 13068 flow [2024-06-27 20:53:07,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 691 transitions, 12894 flow, removed 61 selfloop flow, removed 5 redundant places. [2024-06-27 20:53:07,853 INFO L231 Difference]: Finished difference. Result has 403 places, 673 transitions, 11554 flow [2024-06-27 20:53:07,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11301, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=671, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=612, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11554, PETRI_PLACES=403, PETRI_TRANSITIONS=673} [2024-06-27 20:53:07,854 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 360 predicate places. [2024-06-27 20:53:07,854 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 673 transitions, 11554 flow [2024-06-27 20:53:07,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:53:07,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:53:07,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:53:07,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-27 20:53:07,855 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:53:07,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:53:07,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1750950771, now seen corresponding path program 11 times [2024-06-27 20:53:07,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:53:07,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007491027] [2024-06-27 20:53:07,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:53:07,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:53:07,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:53:10,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:53:10,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:53:10,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007491027] [2024-06-27 20:53:10,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007491027] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:53:10,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:53:10,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:53:10,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506533506] [2024-06-27 20:53:10,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:53:10,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:53:10,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:53:10,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:53:10,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:53:10,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:53:10,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 673 transitions, 11554 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:53:10,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:53:10,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:53:10,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:53:13,397 INFO L124 PetriNetUnfolderBase]: 5209/8556 cut-off events. [2024-06-27 20:53:13,397 INFO L125 PetriNetUnfolderBase]: For 1716321/1716329 co-relation queries the response was YES. [2024-06-27 20:53:13,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93276 conditions, 8556 events. 5209/8556 cut-off events. For 1716321/1716329 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 58381 event pairs, 935 based on Foata normal form. 36/8590 useless extension candidates. Maximal degree in co-relation 93079. Up to 7337 conditions per place. [2024-06-27 20:53:13,564 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 635 selfloop transitions, 135 changer transitions 0/775 dead transitions. [2024-06-27 20:53:13,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 775 transitions, 14554 flow [2024-06-27 20:53:13,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:53:13,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:53:13,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-27 20:53:13,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-27 20:53:13,566 INFO L175 Difference]: Start difference. First operand has 403 places, 673 transitions, 11554 flow. Second operand 9 states and 159 transitions. [2024-06-27 20:53:13,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 775 transitions, 14554 flow [2024-06-27 20:53:19,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 775 transitions, 14376 flow, removed 34 selfloop flow, removed 8 redundant places. [2024-06-27 20:53:19,213 INFO L231 Difference]: Finished difference. Result has 407 places, 732 transitions, 12916 flow [2024-06-27 20:53:19,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11376, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=673, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=541, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12916, PETRI_PLACES=407, PETRI_TRANSITIONS=732} [2024-06-27 20:53:19,214 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 364 predicate places. [2024-06-27 20:53:19,214 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 732 transitions, 12916 flow [2024-06-27 20:53:19,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:53:19,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:53:19,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:53:19,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-27 20:53:19,215 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:53:19,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:53:19,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1723691600, now seen corresponding path program 1 times [2024-06-27 20:53:19,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:53:19,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508673398] [2024-06-27 20:53:19,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:53:19,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:53:19,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:53:21,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:53:21,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:53:21,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508673398] [2024-06-27 20:53:21,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508673398] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:53:21,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:53:21,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:53:21,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203122574] [2024-06-27 20:53:21,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:53:21,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:53:21,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:53:21,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:53:21,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:53:21,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:53:21,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 732 transitions, 12916 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:53:21,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:53:21,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:53:21,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:53:24,795 INFO L124 PetriNetUnfolderBase]: 5214/8561 cut-off events. [2024-06-27 20:53:24,795 INFO L125 PetriNetUnfolderBase]: For 1554992/1554994 co-relation queries the response was YES. [2024-06-27 20:53:24,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94171 conditions, 8561 events. 5214/8561 cut-off events. For 1554992/1554994 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 58341 event pairs, 1147 based on Foata normal form. 1/8560 useless extension candidates. Maximal degree in co-relation 93971. Up to 7986 conditions per place. [2024-06-27 20:53:24,932 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 734 selfloop transitions, 21 changer transitions 0/760 dead transitions. [2024-06-27 20:53:24,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 760 transitions, 14608 flow [2024-06-27 20:53:24,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:53:24,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:53:24,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-27 20:53:24,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3783068783068783 [2024-06-27 20:53:24,933 INFO L175 Difference]: Start difference. First operand has 407 places, 732 transitions, 12916 flow. Second operand 9 states and 143 transitions. [2024-06-27 20:53:24,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 760 transitions, 14608 flow [2024-06-27 20:53:31,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 760 transitions, 14419 flow, removed 45 selfloop flow, removed 3 redundant places. [2024-06-27 20:53:31,555 INFO L231 Difference]: Finished difference. Result has 413 places, 735 transitions, 12895 flow [2024-06-27 20:53:31,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12727, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=732, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=711, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12895, PETRI_PLACES=413, PETRI_TRANSITIONS=735} [2024-06-27 20:53:31,556 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 370 predicate places. [2024-06-27 20:53:31,556 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 735 transitions, 12895 flow [2024-06-27 20:53:31,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:53:31,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:53:31,556 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:53:31,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-27 20:53:31,556 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:53:31,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:53:31,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1551812222, now seen corresponding path program 2 times [2024-06-27 20:53:31,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:53:31,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715281033] [2024-06-27 20:53:31,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:53:31,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:53:31,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:53:34,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:53:34,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:53:34,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715281033] [2024-06-27 20:53:34,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715281033] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:53:34,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:53:34,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:53:34,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479801549] [2024-06-27 20:53:34,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:53:34,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:53:34,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:53:34,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:53:34,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:53:34,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:53:34,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 735 transitions, 12895 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:53:34,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:53:34,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:53:34,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:53:37,523 INFO L124 PetriNetUnfolderBase]: 5211/8557 cut-off events. [2024-06-27 20:53:37,523 INFO L125 PetriNetUnfolderBase]: For 1554289/1554291 co-relation queries the response was YES. [2024-06-27 20:53:37,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93302 conditions, 8557 events. 5211/8557 cut-off events. For 1554289/1554291 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 58330 event pairs, 1147 based on Foata normal form. 1/8556 useless extension candidates. Maximal degree in co-relation 93101. Up to 7976 conditions per place. [2024-06-27 20:53:37,660 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 725 selfloop transitions, 26 changer transitions 0/756 dead transitions. [2024-06-27 20:53:37,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 756 transitions, 14453 flow [2024-06-27 20:53:37,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:53:37,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:53:37,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-27 20:53:37,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.373015873015873 [2024-06-27 20:53:37,661 INFO L175 Difference]: Start difference. First operand has 413 places, 735 transitions, 12895 flow. Second operand 9 states and 141 transitions. [2024-06-27 20:53:37,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 756 transitions, 14453 flow [2024-06-27 20:53:44,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 756 transitions, 14253 flow, removed 81 selfloop flow, removed 7 redundant places. [2024-06-27 20:53:44,369 INFO L231 Difference]: Finished difference. Result has 415 places, 735 transitions, 12753 flow [2024-06-27 20:53:44,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12695, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=735, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=709, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12753, PETRI_PLACES=415, PETRI_TRANSITIONS=735} [2024-06-27 20:53:44,370 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 372 predicate places. [2024-06-27 20:53:44,370 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 735 transitions, 12753 flow [2024-06-27 20:53:44,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:53:44,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:53:44,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:53:44,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-27 20:53:44,371 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:53:44,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:53:44,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1830171659, now seen corresponding path program 1 times [2024-06-27 20:53:44,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:53:44,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274851640] [2024-06-27 20:53:44,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:53:44,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:53:44,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:53:46,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:53:46,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:53:46,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274851640] [2024-06-27 20:53:46,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274851640] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:53:46,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:53:46,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:53:46,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495848989] [2024-06-27 20:53:46,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:53:46,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:53:46,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:53:46,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:53:46,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:53:46,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:53:46,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 735 transitions, 12753 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:53:46,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:53:46,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:53:46,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:53:49,455 INFO L124 PetriNetUnfolderBase]: 5255/8625 cut-off events. [2024-06-27 20:53:49,456 INFO L125 PetriNetUnfolderBase]: For 1658255/1658257 co-relation queries the response was YES. [2024-06-27 20:53:49,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94322 conditions, 8625 events. 5255/8625 cut-off events. For 1658255/1658257 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 58862 event pairs, 1151 based on Foata normal form. 12/8635 useless extension candidates. Maximal degree in co-relation 94120. Up to 8007 conditions per place. [2024-06-27 20:53:49,622 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 733 selfloop transitions, 25 changer transitions 0/763 dead transitions. [2024-06-27 20:53:49,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 763 transitions, 14521 flow [2024-06-27 20:53:49,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:53:49,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:53:49,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-27 20:53:49,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835978835978836 [2024-06-27 20:53:49,624 INFO L175 Difference]: Start difference. First operand has 415 places, 735 transitions, 12753 flow. Second operand 9 states and 145 transitions. [2024-06-27 20:53:49,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 763 transitions, 14521 flow [2024-06-27 20:53:56,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 763 transitions, 14443 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-27 20:53:56,879 INFO L231 Difference]: Finished difference. Result has 416 places, 737 transitions, 12817 flow [2024-06-27 20:53:56,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12675, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=735, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=710, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12817, PETRI_PLACES=416, PETRI_TRANSITIONS=737} [2024-06-27 20:53:56,880 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 373 predicate places. [2024-06-27 20:53:56,880 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 737 transitions, 12817 flow [2024-06-27 20:53:56,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:53:56,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:53:56,881 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:53:56,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-27 20:53:56,881 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:53:56,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:53:56,881 INFO L85 PathProgramCache]: Analyzing trace with hash -809484624, now seen corresponding path program 3 times [2024-06-27 20:53:56,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:53:56,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341319442] [2024-06-27 20:53:56,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:53:56,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:53:56,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:53:59,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:53:59,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:53:59,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341319442] [2024-06-27 20:53:59,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341319442] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:53:59,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:53:59,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:53:59,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204053341] [2024-06-27 20:53:59,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:53:59,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:53:59,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:53:59,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:53:59,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:53:59,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:53:59,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 737 transitions, 12817 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:53:59,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:53:59,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:53:59,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:54:02,312 INFO L124 PetriNetUnfolderBase]: 5260/8634 cut-off events. [2024-06-27 20:54:02,312 INFO L125 PetriNetUnfolderBase]: For 1614166/1614168 co-relation queries the response was YES. [2024-06-27 20:54:02,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94897 conditions, 8634 events. 5260/8634 cut-off events. For 1614166/1614168 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 58927 event pairs, 1151 based on Foata normal form. 1/8633 useless extension candidates. Maximal degree in co-relation 94694. Up to 8059 conditions per place. [2024-06-27 20:54:02,493 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 730 selfloop transitions, 27 changer transitions 0/762 dead transitions. [2024-06-27 20:54:02,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 762 transitions, 14511 flow [2024-06-27 20:54:02,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:54:02,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:54:02,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 152 transitions. [2024-06-27 20:54:02,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3619047619047619 [2024-06-27 20:54:02,494 INFO L175 Difference]: Start difference. First operand has 416 places, 737 transitions, 12817 flow. Second operand 10 states and 152 transitions. [2024-06-27 20:54:02,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 762 transitions, 14511 flow [2024-06-27 20:54:10,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 762 transitions, 14439 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-27 20:54:10,852 INFO L231 Difference]: Finished difference. Result has 419 places, 740 transitions, 12933 flow [2024-06-27 20:54:10,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12745, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=737, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=710, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12933, PETRI_PLACES=419, PETRI_TRANSITIONS=740} [2024-06-27 20:54:10,853 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 376 predicate places. [2024-06-27 20:54:10,853 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 740 transitions, 12933 flow [2024-06-27 20:54:10,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:10,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:54:10,853 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:54:10,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-27 20:54:10,853 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:54:10,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:54:10,854 INFO L85 PathProgramCache]: Analyzing trace with hash -2033485542, now seen corresponding path program 4 times [2024-06-27 20:54:10,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:54:10,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792708319] [2024-06-27 20:54:10,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:54:10,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:54:10,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:54:13,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:54:13,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:54:13,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792708319] [2024-06-27 20:54:13,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792708319] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:54:13,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:54:13,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:54:13,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127462421] [2024-06-27 20:54:13,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:54:13,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:54:13,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:54:13,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:54:13,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:54:13,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:54:13,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 740 transitions, 12933 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:13,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:54:13,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:54:13,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:54:16,734 INFO L124 PetriNetUnfolderBase]: 5273/8656 cut-off events. [2024-06-27 20:54:16,734 INFO L125 PetriNetUnfolderBase]: For 1647904/1647906 co-relation queries the response was YES. [2024-06-27 20:54:16,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95820 conditions, 8656 events. 5273/8656 cut-off events. For 1647904/1647906 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 59040 event pairs, 1151 based on Foata normal form. 1/8655 useless extension candidates. Maximal degree in co-relation 95616. Up to 8032 conditions per place. [2024-06-27 20:54:16,880 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 703 selfloop transitions, 56 changer transitions 0/764 dead transitions. [2024-06-27 20:54:16,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 764 transitions, 14991 flow [2024-06-27 20:54:16,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:54:16,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:54:16,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-27 20:54:16,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37566137566137564 [2024-06-27 20:54:16,881 INFO L175 Difference]: Start difference. First operand has 419 places, 740 transitions, 12933 flow. Second operand 9 states and 142 transitions. [2024-06-27 20:54:16,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 764 transitions, 14991 flow [2024-06-27 20:54:24,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 764 transitions, 14825 flow, removed 58 selfloop flow, removed 8 redundant places. [2024-06-27 20:54:24,197 INFO L231 Difference]: Finished difference. Result has 420 places, 746 transitions, 13147 flow [2024-06-27 20:54:24,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12767, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=740, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=687, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13147, PETRI_PLACES=420, PETRI_TRANSITIONS=746} [2024-06-27 20:54:24,197 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 377 predicate places. [2024-06-27 20:54:24,197 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 746 transitions, 13147 flow [2024-06-27 20:54:24,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:24,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:54:24,198 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:54:24,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-27 20:54:24,198 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:54:24,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:54:24,198 INFO L85 PathProgramCache]: Analyzing trace with hash -2033485325, now seen corresponding path program 2 times [2024-06-27 20:54:24,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:54:24,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503361717] [2024-06-27 20:54:24,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:54:24,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:54:24,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:54:26,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:54:26,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:54:26,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503361717] [2024-06-27 20:54:26,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503361717] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:54:26,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:54:26,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:54:26,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894394724] [2024-06-27 20:54:26,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:54:26,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:54:26,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:54:26,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:54:26,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:54:26,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:54:26,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 746 transitions, 13147 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:26,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:54:26,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:54:26,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:54:30,205 INFO L124 PetriNetUnfolderBase]: 5317/8724 cut-off events. [2024-06-27 20:54:30,205 INFO L125 PetriNetUnfolderBase]: For 1764664/1764666 co-relation queries the response was YES. [2024-06-27 20:54:30,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97467 conditions, 8724 events. 5317/8724 cut-off events. For 1764664/1764666 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 59608 event pairs, 1157 based on Foata normal form. 12/8734 useless extension candidates. Maximal degree in co-relation 97262. Up to 8077 conditions per place. [2024-06-27 20:54:30,353 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 722 selfloop transitions, 44 changer transitions 0/771 dead transitions. [2024-06-27 20:54:30,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 771 transitions, 14937 flow [2024-06-27 20:54:30,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:54:30,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:54:30,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 158 transitions. [2024-06-27 20:54:30,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3761904761904762 [2024-06-27 20:54:30,354 INFO L175 Difference]: Start difference. First operand has 420 places, 746 transitions, 13147 flow. Second operand 10 states and 158 transitions. [2024-06-27 20:54:30,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 771 transitions, 14937 flow [2024-06-27 20:54:36,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 771 transitions, 14760 flow, removed 72 selfloop flow, removed 4 redundant places. [2024-06-27 20:54:36,388 INFO L231 Difference]: Finished difference. Result has 426 places, 748 transitions, 13159 flow [2024-06-27 20:54:36,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12970, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=746, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=702, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13159, PETRI_PLACES=426, PETRI_TRANSITIONS=748} [2024-06-27 20:54:36,388 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 383 predicate places. [2024-06-27 20:54:36,388 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 748 transitions, 13159 flow [2024-06-27 20:54:36,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:36,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:54:36,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:54:36,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-27 20:54:36,389 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:54:36,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:54:36,389 INFO L85 PathProgramCache]: Analyzing trace with hash -803912777, now seen corresponding path program 3 times [2024-06-27 20:54:36,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:54:36,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515788921] [2024-06-27 20:54:36,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:54:36,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:54:36,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:54:38,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:54:38,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:54:38,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515788921] [2024-06-27 20:54:38,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515788921] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:54:38,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:54:38,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:54:38,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51007407] [2024-06-27 20:54:38,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:54:38,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:54:38,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:54:38,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:54:38,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:54:38,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:54:38,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 748 transitions, 13159 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:38,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:54:38,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:54:38,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:54:42,214 INFO L124 PetriNetUnfolderBase]: 5325/8736 cut-off events. [2024-06-27 20:54:42,215 INFO L125 PetriNetUnfolderBase]: For 1723634/1723636 co-relation queries the response was YES. [2024-06-27 20:54:42,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98080 conditions, 8736 events. 5325/8736 cut-off events. For 1723634/1723636 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 59698 event pairs, 1155 based on Foata normal form. 2/8736 useless extension candidates. Maximal degree in co-relation 97873. Up to 8123 conditions per place. [2024-06-27 20:54:42,371 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 728 selfloop transitions, 38 changer transitions 0/771 dead transitions. [2024-06-27 20:54:42,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 771 transitions, 14926 flow [2024-06-27 20:54:42,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:54:42,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:54:42,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 139 transitions. [2024-06-27 20:54:42,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36772486772486773 [2024-06-27 20:54:42,373 INFO L175 Difference]: Start difference. First operand has 426 places, 748 transitions, 13159 flow. Second operand 9 states and 139 transitions. [2024-06-27 20:54:42,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 771 transitions, 14926 flow [2024-06-27 20:54:47,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 771 transitions, 14798 flow, removed 23 selfloop flow, removed 8 redundant places. [2024-06-27 20:54:47,897 INFO L231 Difference]: Finished difference. Result has 428 places, 752 transitions, 13317 flow [2024-06-27 20:54:47,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13046, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=748, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=710, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13317, PETRI_PLACES=428, PETRI_TRANSITIONS=752} [2024-06-27 20:54:47,903 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 385 predicate places. [2024-06-27 20:54:47,903 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 752 transitions, 13317 flow [2024-06-27 20:54:47,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:47,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:54:47,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:54:47,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-27 20:54:47,904 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:54:47,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:54:47,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1407916112, now seen corresponding path program 5 times [2024-06-27 20:54:47,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:54:47,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021161644] [2024-06-27 20:54:47,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:54:47,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:54:47,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:54:50,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:54:50,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:54:50,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021161644] [2024-06-27 20:54:50,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021161644] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:54:50,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:54:50,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:54:50,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081295002] [2024-06-27 20:54:50,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:54:50,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:54:50,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:54:50,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:54:50,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:54:50,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:54:50,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 752 transitions, 13317 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:50,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:54:50,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:54:50,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:54:54,244 INFO L124 PetriNetUnfolderBase]: 5322/8732 cut-off events. [2024-06-27 20:54:54,244 INFO L125 PetriNetUnfolderBase]: For 1733477/1733479 co-relation queries the response was YES. [2024-06-27 20:54:54,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98171 conditions, 8732 events. 5322/8732 cut-off events. For 1733477/1733479 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 59688 event pairs, 1159 based on Foata normal form. 1/8731 useless extension candidates. Maximal degree in co-relation 97962. Up to 8130 conditions per place. [2024-06-27 20:54:54,393 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 726 selfloop transitions, 38 changer transitions 0/769 dead transitions. [2024-06-27 20:54:54,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 769 transitions, 14889 flow [2024-06-27 20:54:54,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:54:54,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:54:54,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-27 20:54:54,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.373015873015873 [2024-06-27 20:54:54,395 INFO L175 Difference]: Start difference. First operand has 428 places, 752 transitions, 13317 flow. Second operand 9 states and 141 transitions. [2024-06-27 20:54:54,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 769 transitions, 14889 flow [2024-06-27 20:54:59,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 769 transitions, 14568 flow, removed 129 selfloop flow, removed 6 redundant places. [2024-06-27 20:54:59,997 INFO L231 Difference]: Finished difference. Result has 431 places, 752 transitions, 13078 flow [2024-06-27 20:55:00,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12996, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=752, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=714, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13078, PETRI_PLACES=431, PETRI_TRANSITIONS=752} [2024-06-27 20:55:00,013 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 388 predicate places. [2024-06-27 20:55:00,013 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 752 transitions, 13078 flow [2024-06-27 20:55:00,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:55:00,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:55:00,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:55:00,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-27 20:55:00,013 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:55:00,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:55:00,014 INFO L85 PathProgramCache]: Analyzing trace with hash 567244857, now seen corresponding path program 4 times [2024-06-27 20:55:00,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:55:00,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522864140] [2024-06-27 20:55:00,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:55:00,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:55:00,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:55:02,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:55:02,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:55:02,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522864140] [2024-06-27 20:55:02,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522864140] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:55:02,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:55:02,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:55:02,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670043393] [2024-06-27 20:55:02,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:55:02,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:55:02,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:55:02,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:55:02,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:55:02,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:55:02,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 752 transitions, 13078 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:55:02,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:55:02,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:55:02,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:55:05,792 INFO L124 PetriNetUnfolderBase]: 5402/8854 cut-off events. [2024-06-27 20:55:05,792 INFO L125 PetriNetUnfolderBase]: For 1866517/1866521 co-relation queries the response was YES. [2024-06-27 20:55:06,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101299 conditions, 8854 events. 5402/8854 cut-off events. For 1866517/1866521 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 60524 event pairs, 1183 based on Foata normal form. 4/8856 useless extension candidates. Maximal degree in co-relation 101089. Up to 8131 conditions per place. [2024-06-27 20:55:06,152 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 701 selfloop transitions, 71 changer transitions 0/777 dead transitions. [2024-06-27 20:55:06,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 777 transitions, 15222 flow [2024-06-27 20:55:06,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:55:06,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:55:06,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 161 transitions. [2024-06-27 20:55:06,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38333333333333336 [2024-06-27 20:55:06,154 INFO L175 Difference]: Start difference. First operand has 431 places, 752 transitions, 13078 flow. Second operand 10 states and 161 transitions. [2024-06-27 20:55:06,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 777 transitions, 15222 flow [2024-06-27 20:55:11,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 777 transitions, 15082 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-27 20:55:11,924 INFO L231 Difference]: Finished difference. Result has 433 places, 756 transitions, 13281 flow [2024-06-27 20:55:11,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12938, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=752, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=683, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13281, PETRI_PLACES=433, PETRI_TRANSITIONS=756} [2024-06-27 20:55:11,925 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 390 predicate places. [2024-06-27 20:55:11,925 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 756 transitions, 13281 flow [2024-06-27 20:55:11,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:55:11,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:55:11,925 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:55:11,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-27 20:55:11,926 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:55:11,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:55:11,926 INFO L85 PathProgramCache]: Analyzing trace with hash 567237200, now seen corresponding path program 6 times [2024-06-27 20:55:11,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:55:11,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909827611] [2024-06-27 20:55:11,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:55:11,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:55:11,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat