./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe015_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/safe015_power.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe015_power.opt.i ./goblint.2024-06-19_11-23-25.files/protection/safe015_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-eb4cb34-m [2024-06-21 17:37:26,958 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 17:37:27,016 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 17:37:27,021 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 17:37:27,021 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 17:37:27,045 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 17:37:27,046 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 17:37:27,046 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 17:37:27,046 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 17:37:27,049 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 17:37:27,050 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 17:37:27,050 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 17:37:27,051 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 17:37:27,052 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 17:37:27,052 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 17:37:27,052 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 17:37:27,052 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 17:37:27,052 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 17:37:27,053 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 17:37:27,053 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 17:37:27,053 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 17:37:27,053 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 17:37:27,054 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 17:37:27,054 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 17:37:27,054 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 17:37:27,054 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 17:37:27,054 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 17:37:27,055 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 17:37:27,055 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 17:37:27,055 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 17:37:27,056 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 17:37:27,056 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 17:37:27,056 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 17:37:27,057 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 17:37:27,057 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 17:37:27,057 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 17:37:27,069 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 17:37:27,069 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 17:37:27,069 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 17:37:27,069 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 17:37:27,069 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 17:37:27,069 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 17:37:27,069 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 17:37:27,070 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 17:37:27,326 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 17:37:27,342 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 17:37:27,343 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 17:37:27,344 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 17:37:27,345 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 17:37:27,346 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe015_power.opt.i [2024-06-21 17:37:28,385 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 17:37:28,620 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 17:37:28,621 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe015_power.opt.i [2024-06-21 17:37:28,636 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/560b8b483/cf3fb0fd42aa455d9c0fac15d6ad68a0/FLAGbc4aa91a8 [2024-06-21 17:37:28,650 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/560b8b483/cf3fb0fd42aa455d9c0fac15d6ad68a0 [2024-06-21 17:37:28,652 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 17:37:28,653 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 17:37:28,655 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe015_power.opt.yml/witness.yml [2024-06-21 17:37:28,866 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 17:37:28,867 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 17:37:28,868 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 17:37:28,868 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 17:37:28,872 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 17:37:28,873 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 05:37:28" (1/2) ... [2024-06-21 17:37:28,873 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30473612 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:37:28, skipping insertion in model container [2024-06-21 17:37:28,874 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 05:37:28" (1/2) ... [2024-06-21 17:37:28,875 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2c42e895 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:37:28, skipping insertion in model container [2024-06-21 17:37:28,875 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 05:37:28" (2/2) ... [2024-06-21 17:37:28,876 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30473612 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:37:28, skipping insertion in model container [2024-06-21 17:37:28,876 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 05:37:28" (2/2) ... [2024-06-21 17:37:28,877 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 17:37:29,008 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 17:37:29,009 INFO L97 edCorrectnessWitness]: Location invariant before [L859-L859] (((((((((((((((((((((((((((((((((((! multithreaded || x$r_buff0_thd0 == (_Bool)0) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$w_buff0 == 0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || x$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$w_buff0_used == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2))) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && ((*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1) || *__unbuffered_p2_EAX$read_delayed_var == 2))))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2)) [2024-06-21 17:37:29,009 INFO L97 edCorrectnessWitness]: Location invariant before [L856-L856] (((((((((((((((((((((((((((((((((((! multithreaded || x$r_buff0_thd0 == (_Bool)0) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$w_buff0 == 0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || x$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$w_buff0_used == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2))) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && ((*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1) || *__unbuffered_p2_EAX$read_delayed_var == 2))))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2)) [2024-06-21 17:37:29,010 INFO L97 edCorrectnessWitness]: Location invariant before [L858-L858] (((((((((((((((((((((((((((((((((((! multithreaded || x$r_buff0_thd0 == (_Bool)0) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$w_buff0 == 0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || x$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$w_buff0_used == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2))) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && ((*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1) || *__unbuffered_p2_EAX$read_delayed_var == 2))))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2)) [2024-06-21 17:37:29,010 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 17:37:29,010 INFO L106 edCorrectnessWitness]: ghost_update [L854-L854] multithreaded = 1; [2024-06-21 17:37:29,050 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 17:37:29,346 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 17:37:29,354 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 17:37:29,461 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 17:37:29,497 INFO L206 MainTranslator]: Completed translation [2024-06-21 17:37:29,497 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:37:29 WrapperNode [2024-06-21 17:37:29,498 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 17:37:29,499 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 17:37:29,499 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 17:37:29,499 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 17:37:29,504 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:37:29" (1/1) ... [2024-06-21 17:37:29,521 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:37:29" (1/1) ... [2024-06-21 17:37:29,560 INFO L138 Inliner]: procedures = 175, calls = 93, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 224 [2024-06-21 17:37:29,560 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 17:37:29,561 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 17:37:29,561 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 17:37:29,561 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 17:37:29,621 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:37:29" (1/1) ... [2024-06-21 17:37:29,621 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:37:29" (1/1) ... [2024-06-21 17:37:29,625 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:37:29" (1/1) ... [2024-06-21 17:37:29,641 INFO L175 MemorySlicer]: Split 50 memory accesses to 2 slices as follows [2, 48]. 96 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 11 writes are split as follows [0, 11]. [2024-06-21 17:37:29,648 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:37:29" (1/1) ... [2024-06-21 17:37:29,649 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:37:29" (1/1) ... [2024-06-21 17:37:29,667 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:37:29" (1/1) ... [2024-06-21 17:37:29,678 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:37:29" (1/1) ... [2024-06-21 17:37:29,680 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:37:29" (1/1) ... [2024-06-21 17:37:29,681 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:37:29" (1/1) ... [2024-06-21 17:37:29,685 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 17:37:29,685 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 17:37:29,685 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 17:37:29,686 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 17:37:29,686 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:37:29" (1/1) ... [2024-06-21 17:37:29,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 17:37:29,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 17:37:29,728 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-21 17:37:29,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-21 17:37:29,773 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-21 17:37:29,774 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-21 17:37:29,774 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-21 17:37:29,774 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-21 17:37:29,774 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 17:37:29,775 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 17:37:29,775 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 17:37:29,775 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 17:37:29,775 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 17:37:29,775 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 17:37:29,775 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 17:37:29,776 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 17:37:29,776 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 17:37:29,776 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-21 17:37:29,777 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 17:37:29,777 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 17:37:29,778 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 17:37:29,779 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 17:37:29,930 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 17:37:29,932 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 17:37:30,444 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 17:37:30,445 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 17:37:30,833 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 17:37:30,833 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 17:37:30,833 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 05:37:30 BoogieIcfgContainer [2024-06-21 17:37:30,833 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 17:37:30,836 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 17:37:30,836 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 17:37:30,838 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 17:37:30,838 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 05:37:28" (1/4) ... [2024-06-21 17:37:30,839 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43eaad16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 05:37:30, skipping insertion in model container [2024-06-21 17:37:30,839 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 05:37:28" (2/4) ... [2024-06-21 17:37:30,839 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43eaad16 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 05:37:30, skipping insertion in model container [2024-06-21 17:37:30,839 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:37:29" (3/4) ... [2024-06-21 17:37:30,840 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43eaad16 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 05:37:30, skipping insertion in model container [2024-06-21 17:37:30,840 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 05:37:30" (4/4) ... [2024-06-21 17:37:30,841 INFO L112 eAbstractionObserver]: Analyzing ICFG safe015_power.opt.i [2024-06-21 17:37:30,855 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 17:37:30,855 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 17:37:30,855 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 17:37:30,949 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 17:37:30,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 43 transitions, 98 flow [2024-06-21 17:37:31,006 INFO L124 PetriNetUnfolderBase]: 0/40 cut-off events. [2024-06-21 17:37:31,007 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 17:37:31,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 40 events. 0/40 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 62 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 17:37:31,008 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 43 transitions, 98 flow [2024-06-21 17:37:31,011 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 34 transitions, 77 flow [2024-06-21 17:37:31,016 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 17:37:31,021 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;@2f87db33, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 17:37:31,021 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 17:37:31,024 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 17:37:31,024 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 17:37:31,024 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 17:37:31,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:37:31,025 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 17:37:31,025 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:37:31,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:37:31,029 INFO L85 PathProgramCache]: Analyzing trace with hash 888392606, now seen corresponding path program 1 times [2024-06-21 17:37:31,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:37:31,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219725256] [2024-06-21 17:37:31,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:37:31,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:37:31,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:37:32,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:37:32,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:37:32,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219725256] [2024-06-21 17:37:32,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219725256] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:37:32,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:37:32,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 17:37:32,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757187570] [2024-06-21 17:37:32,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:37:32,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 17:37:32,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:37:32,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 17:37:32,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 17:37:32,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 17:37:32,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:37:32,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:37:32,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 17:37:32,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:37:33,219 INFO L124 PetriNetUnfolderBase]: 1412/2149 cut-off events. [2024-06-21 17:37:33,219 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-06-21 17:37:33,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4351 conditions, 2149 events. 1412/2149 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10203 event pairs, 956 based on Foata normal form. 1/2115 useless extension candidates. Maximal degree in co-relation 4339. Up to 2115 conditions per place. [2024-06-21 17:37:33,234 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 36 selfloop transitions, 4 changer transitions 0/46 dead transitions. [2024-06-21 17:37:33,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 46 transitions, 187 flow [2024-06-21 17:37:33,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 17:37:33,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 17:37:33,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 70 transitions. [2024-06-21 17:37:33,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5426356589147286 [2024-06-21 17:37:33,246 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 77 flow. Second operand 3 states and 70 transitions. [2024-06-21 17:37:33,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 46 transitions, 187 flow [2024-06-21 17:37:33,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 46 transitions, 182 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 17:37:33,250 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 104 flow [2024-06-21 17:37:33,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2024-06-21 17:37:33,254 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2024-06-21 17:37:33,254 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 104 flow [2024-06-21 17:37:33,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:37:33,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:37:33,255 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:37:33,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 17:37:33,255 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:37:33,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:37:33,256 INFO L85 PathProgramCache]: Analyzing trace with hash -952094093, now seen corresponding path program 1 times [2024-06-21 17:37:33,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:37:33,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309473026] [2024-06-21 17:37:33,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:37:33,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:37:33,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:37:34,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:37:34,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:37:34,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309473026] [2024-06-21 17:37:34,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309473026] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:37:34,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:37:34,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 17:37:34,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416312041] [2024-06-21 17:37:34,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:37:34,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 17:37:34,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:37:34,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 17:37:34,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 17:37:34,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 17:37:34,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:37:34,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:37:34,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 17:37:34,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:37:35,080 INFO L124 PetriNetUnfolderBase]: 1400/2131 cut-off events. [2024-06-21 17:37:35,081 INFO L125 PetriNetUnfolderBase]: For 399/399 co-relation queries the response was YES. [2024-06-21 17:37:35,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4875 conditions, 2131 events. 1400/2131 cut-off events. For 399/399 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10154 event pairs, 654 based on Foata normal form. 6/2136 useless extension candidates. Maximal degree in co-relation 4863. Up to 2059 conditions per place. [2024-06-21 17:37:35,091 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 46 selfloop transitions, 7 changer transitions 0/59 dead transitions. [2024-06-21 17:37:35,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 59 transitions, 266 flow [2024-06-21 17:37:35,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 17:37:35,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 17:37:35,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 92 transitions. [2024-06-21 17:37:35,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5348837209302325 [2024-06-21 17:37:35,093 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 104 flow. Second operand 4 states and 92 transitions. [2024-06-21 17:37:35,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 59 transitions, 266 flow [2024-06-21 17:37:35,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 59 transitions, 262 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 17:37:35,096 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 140 flow [2024-06-21 17:37:35,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=140, PETRI_PLACES=47, PETRI_TRANSITIONS=40} [2024-06-21 17:37:35,097 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2024-06-21 17:37:35,097 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 140 flow [2024-06-21 17:37:35,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:37:35,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:37:35,097 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:37:35,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 17:37:35,098 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:37:35,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:37:35,098 INFO L85 PathProgramCache]: Analyzing trace with hash -261872783, now seen corresponding path program 1 times [2024-06-21 17:37:35,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:37:35,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220482861] [2024-06-21 17:37:35,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:37:35,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:37:35,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:37:37,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:37:37,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:37:37,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220482861] [2024-06-21 17:37:37,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220482861] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:37:37,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:37:37,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 17:37:37,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661647743] [2024-06-21 17:37:37,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:37:37,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 17:37:37,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:37:37,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 17:37:37,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 17:37:37,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 17:37:37,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 140 flow. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:37:37,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:37:37,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 17:37:37,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:37:38,096 INFO L124 PetriNetUnfolderBase]: 1391/2116 cut-off events. [2024-06-21 17:37:38,097 INFO L125 PetriNetUnfolderBase]: For 1120/1120 co-relation queries the response was YES. [2024-06-21 17:37:38,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5383 conditions, 2116 events. 1391/2116 cut-off events. For 1120/1120 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10059 event pairs, 485 based on Foata normal form. 6/2121 useless extension candidates. Maximal degree in co-relation 5369. Up to 2006 conditions per place. [2024-06-21 17:37:38,107 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 59 selfloop transitions, 12 changer transitions 0/77 dead transitions. [2024-06-21 17:37:38,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 77 transitions, 384 flow [2024-06-21 17:37:38,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:37:38,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:37:38,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 128 transitions. [2024-06-21 17:37:38,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49612403100775193 [2024-06-21 17:37:38,111 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 140 flow. Second operand 6 states and 128 transitions. [2024-06-21 17:37:38,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 77 transitions, 384 flow [2024-06-21 17:37:38,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 77 transitions, 364 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-21 17:37:38,113 INFO L231 Difference]: Finished difference. Result has 51 places, 44 transitions, 183 flow [2024-06-21 17:37:38,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=183, PETRI_PLACES=51, PETRI_TRANSITIONS=44} [2024-06-21 17:37:38,114 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 7 predicate places. [2024-06-21 17:37:38,114 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 44 transitions, 183 flow [2024-06-21 17:37:38,114 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) [2024-06-21 17:37:38,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:37:38,115 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:37:38,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 17:37:38,115 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:37:38,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:37:38,115 INFO L85 PathProgramCache]: Analyzing trace with hash -448304984, now seen corresponding path program 1 times [2024-06-21 17:37:38,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:37:38,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471577220] [2024-06-21 17:37:38,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:37:38,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:37:38,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:37:39,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:37:39,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:37:39,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471577220] [2024-06-21 17:37:39,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471577220] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:37:39,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:37:39,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 17:37:39,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341842747] [2024-06-21 17:37:39,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:37:39,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 17:37:39,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:37:39,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 17:37:39,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 17:37:39,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:37:39,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 44 transitions, 183 flow. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:37:39,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:37:39,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:37:39,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:37:40,141 INFO L124 PetriNetUnfolderBase]: 1386/2110 cut-off events. [2024-06-21 17:37:40,142 INFO L125 PetriNetUnfolderBase]: For 2156/2156 co-relation queries the response was YES. [2024-06-21 17:37:40,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5896 conditions, 2110 events. 1386/2110 cut-off events. For 2156/2156 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10003 event pairs, 572 based on Foata normal form. 2/2110 useless extension candidates. Maximal degree in co-relation 5879. Up to 2036 conditions per place. [2024-06-21 17:37:40,153 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 51 selfloop transitions, 11 changer transitions 0/67 dead transitions. [2024-06-21 17:37:40,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 67 transitions, 387 flow [2024-06-21 17:37:40,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 17:37:40,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 17:37:40,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 94 transitions. [2024-06-21 17:37:40,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4372093023255814 [2024-06-21 17:37:40,157 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 183 flow. Second operand 5 states and 94 transitions. [2024-06-21 17:37:40,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 67 transitions, 387 flow [2024-06-21 17:37:40,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 67 transitions, 360 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 17:37:40,162 INFO L231 Difference]: Finished difference. Result has 54 places, 50 transitions, 230 flow [2024-06-21 17:37:40,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=230, PETRI_PLACES=54, PETRI_TRANSITIONS=50} [2024-06-21 17:37:40,163 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 10 predicate places. [2024-06-21 17:37:40,163 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 50 transitions, 230 flow [2024-06-21 17:37:40,163 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) [2024-06-21 17:37:40,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:37:40,164 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:37:40,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 17:37:40,164 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:37:40,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:37:40,165 INFO L85 PathProgramCache]: Analyzing trace with hash -991279510, now seen corresponding path program 1 times [2024-06-21 17:37:40,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:37:40,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331784438] [2024-06-21 17:37:40,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:37:40,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:37:40,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:37:41,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:37:41,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:37:41,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331784438] [2024-06-21 17:37:41,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331784438] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:37:41,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:37:41,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 17:37:41,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536908797] [2024-06-21 17:37:41,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:37:41,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 17:37:41,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:37:41,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 17:37:41,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 17:37:41,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:37:41,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 50 transitions, 230 flow. Second operand has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:37:41,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:37:41,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:37:41,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:37:42,295 INFO L124 PetriNetUnfolderBase]: 1376/2096 cut-off events. [2024-06-21 17:37:42,295 INFO L125 PetriNetUnfolderBase]: For 3355/3357 co-relation queries the response was YES. [2024-06-21 17:37:42,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6455 conditions, 2096 events. 1376/2096 cut-off events. For 3355/3357 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9923 event pairs, 566 based on Foata normal form. 6/2101 useless extension candidates. Maximal degree in co-relation 6435. Up to 2028 conditions per place. [2024-06-21 17:37:42,305 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 50 selfloop transitions, 10 changer transitions 0/65 dead transitions. [2024-06-21 17:37:42,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 65 transitions, 386 flow [2024-06-21 17:37:42,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 17:37:42,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 17:37:42,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 92 transitions. [2024-06-21 17:37:42,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42790697674418604 [2024-06-21 17:37:42,306 INFO L175 Difference]: Start difference. First operand has 54 places, 50 transitions, 230 flow. Second operand 5 states and 92 transitions. [2024-06-21 17:37:42,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 65 transitions, 386 flow [2024-06-21 17:37:42,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 65 transitions, 372 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-06-21 17:37:42,309 INFO L231 Difference]: Finished difference. Result has 58 places, 50 transitions, 244 flow [2024-06-21 17:37:42,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=244, PETRI_PLACES=58, PETRI_TRANSITIONS=50} [2024-06-21 17:37:42,310 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 14 predicate places. [2024-06-21 17:37:42,310 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 50 transitions, 244 flow [2024-06-21 17:37:42,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:37:42,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:37:42,311 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:37:42,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 17:37:42,311 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:37:42,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:37:42,311 INFO L85 PathProgramCache]: Analyzing trace with hash -616949993, now seen corresponding path program 1 times [2024-06-21 17:37:42,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:37:42,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727904918] [2024-06-21 17:37:42,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:37:42,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:37:42,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:37:43,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:37:43,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:37:43,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727904918] [2024-06-21 17:37:43,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727904918] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:37:43,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:37:43,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:37:43,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726989832] [2024-06-21 17:37:43,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:37:43,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:37:43,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:37:43,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:37:43,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:37:43,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:37:43,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 50 transitions, 244 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:37:43,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:37:43,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:37:43,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:37:45,004 INFO L124 PetriNetUnfolderBase]: 1389/2122 cut-off events. [2024-06-21 17:37:45,004 INFO L125 PetriNetUnfolderBase]: For 4396/4396 co-relation queries the response was YES. [2024-06-21 17:37:45,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6769 conditions, 2122 events. 1389/2122 cut-off events. For 4396/4396 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 10146 event pairs, 523 based on Foata normal form. 2/2122 useless extension candidates. Maximal degree in co-relation 6746. Up to 1956 conditions per place. [2024-06-21 17:37:45,016 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 61 selfloop transitions, 18 changer transitions 0/84 dead transitions. [2024-06-21 17:37:45,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 84 transitions, 526 flow [2024-06-21 17:37:45,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:37:45,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:37:45,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 118 transitions. [2024-06-21 17:37:45,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573643410852713 [2024-06-21 17:37:45,017 INFO L175 Difference]: Start difference. First operand has 58 places, 50 transitions, 244 flow. Second operand 6 states and 118 transitions. [2024-06-21 17:37:45,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 84 transitions, 526 flow [2024-06-21 17:37:45,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 84 transitions, 512 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-21 17:37:45,021 INFO L231 Difference]: Finished difference. Result has 63 places, 56 transitions, 328 flow [2024-06-21 17:37:45,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=328, PETRI_PLACES=63, PETRI_TRANSITIONS=56} [2024-06-21 17:37:45,022 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 19 predicate places. [2024-06-21 17:37:45,022 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 56 transitions, 328 flow [2024-06-21 17:37:45,023 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) [2024-06-21 17:37:45,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:37:45,023 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:37:45,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 17:37:45,023 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:37:45,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:37:45,023 INFO L85 PathProgramCache]: Analyzing trace with hash -665621239, now seen corresponding path program 2 times [2024-06-21 17:37:45,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:37:45,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988544710] [2024-06-21 17:37:45,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:37:45,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:37:45,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:37:46,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:37:46,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:37:46,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988544710] [2024-06-21 17:37:46,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988544710] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:37:46,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:37:46,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:37:46,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196407584] [2024-06-21 17:37:46,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:37:46,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:37:46,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:37:46,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:37:46,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:37:46,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:37:46,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 56 transitions, 328 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:37:46,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:37:46,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:37:46,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:37:47,552 INFO L124 PetriNetUnfolderBase]: 1384/2108 cut-off events. [2024-06-21 17:37:47,552 INFO L125 PetriNetUnfolderBase]: For 6466/6466 co-relation queries the response was YES. [2024-06-21 17:37:47,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7416 conditions, 2108 events. 1384/2108 cut-off events. For 6466/6466 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 10054 event pairs, 537 based on Foata normal form. 2/2105 useless extension candidates. Maximal degree in co-relation 7390. Up to 1953 conditions per place. [2024-06-21 17:37:47,564 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 55 selfloop transitions, 21 changer transitions 0/81 dead transitions. [2024-06-21 17:37:47,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 81 transitions, 582 flow [2024-06-21 17:37:47,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:37:47,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:37:47,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 112 transitions. [2024-06-21 17:37:47,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-21 17:37:47,566 INFO L175 Difference]: Start difference. First operand has 63 places, 56 transitions, 328 flow. Second operand 6 states and 112 transitions. [2024-06-21 17:37:47,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 81 transitions, 582 flow [2024-06-21 17:37:47,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 81 transitions, 552 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-21 17:37:47,571 INFO L231 Difference]: Finished difference. Result has 67 places, 59 transitions, 376 flow [2024-06-21 17:37:47,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=376, PETRI_PLACES=67, PETRI_TRANSITIONS=59} [2024-06-21 17:37:47,572 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 23 predicate places. [2024-06-21 17:37:47,572 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 59 transitions, 376 flow [2024-06-21 17:37:47,572 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) [2024-06-21 17:37:47,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:37:47,573 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:37:47,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 17:37:47,573 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:37:47,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:37:47,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1407728023, now seen corresponding path program 1 times [2024-06-21 17:37:47,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:37:47,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476458264] [2024-06-21 17:37:47,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:37:47,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:37:47,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:37:48,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:37:48,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:37:48,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476458264] [2024-06-21 17:37:48,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476458264] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:37:48,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:37:48,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:37:48,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311578830] [2024-06-21 17:37:48,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:37:48,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:37:48,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:37:48,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:37:48,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:37:48,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:37:48,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 59 transitions, 376 flow. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:37:48,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:37:48,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:37:48,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:37:49,720 INFO L124 PetriNetUnfolderBase]: 1471/2248 cut-off events. [2024-06-21 17:37:49,720 INFO L125 PetriNetUnfolderBase]: For 8387/8389 co-relation queries the response was YES. [2024-06-21 17:37:49,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8339 conditions, 2248 events. 1471/2248 cut-off events. For 8387/8389 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 10759 event pairs, 524 based on Foata normal form. 6/2252 useless extension candidates. Maximal degree in co-relation 8311. Up to 2020 conditions per place. [2024-06-21 17:37:49,730 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 72 selfloop transitions, 34 changer transitions 0/111 dead transitions. [2024-06-21 17:37:49,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 111 transitions, 862 flow [2024-06-21 17:37:49,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:37:49,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:37:49,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-06-21 17:37:49,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4684385382059801 [2024-06-21 17:37:49,734 INFO L175 Difference]: Start difference. First operand has 67 places, 59 transitions, 376 flow. Second operand 7 states and 141 transitions. [2024-06-21 17:37:49,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 111 transitions, 862 flow [2024-06-21 17:37:49,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 111 transitions, 798 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-21 17:37:49,740 INFO L231 Difference]: Finished difference. Result has 73 places, 75 transitions, 562 flow [2024-06-21 17:37:49,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=340, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=562, PETRI_PLACES=73, PETRI_TRANSITIONS=75} [2024-06-21 17:37:49,741 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 29 predicate places. [2024-06-21 17:37:49,741 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 75 transitions, 562 flow [2024-06-21 17:37:49,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:37:49,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:37:49,741 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:37:49,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 17:37:49,741 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:37:49,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:37:49,742 INFO L85 PathProgramCache]: Analyzing trace with hash 1689713947, now seen corresponding path program 2 times [2024-06-21 17:37:49,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:37:49,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953733845] [2024-06-21 17:37:49,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:37:49,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:37:49,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:37:51,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:37:51,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:37:51,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953733845] [2024-06-21 17:37:51,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953733845] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:37:51,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:37:51,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:37:51,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123506191] [2024-06-21 17:37:51,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:37:51,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:37:51,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:37:51,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:37:51,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:37:51,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:37:51,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 75 transitions, 562 flow. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:37:51,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:37:51,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:37:51,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:37:52,506 INFO L124 PetriNetUnfolderBase]: 1515/2326 cut-off events. [2024-06-21 17:37:52,506 INFO L125 PetriNetUnfolderBase]: For 10862/10866 co-relation queries the response was YES. [2024-06-21 17:37:52,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9058 conditions, 2326 events. 1515/2326 cut-off events. For 10862/10866 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 11220 event pairs, 531 based on Foata normal form. 10/2334 useless extension candidates. Maximal degree in co-relation 9026. Up to 2058 conditions per place. [2024-06-21 17:37:52,517 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 64 selfloop transitions, 40 changer transitions 0/109 dead transitions. [2024-06-21 17:37:52,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 109 transitions, 950 flow [2024-06-21 17:37:52,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:37:52,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:37:52,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 119 transitions. [2024-06-21 17:37:52,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46124031007751937 [2024-06-21 17:37:52,519 INFO L175 Difference]: Start difference. First operand has 73 places, 75 transitions, 562 flow. Second operand 6 states and 119 transitions. [2024-06-21 17:37:52,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 109 transitions, 950 flow [2024-06-21 17:37:52,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 109 transitions, 900 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 17:37:52,528 INFO L231 Difference]: Finished difference. Result has 76 places, 81 transitions, 679 flow [2024-06-21 17:37:52,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=518, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=679, PETRI_PLACES=76, PETRI_TRANSITIONS=81} [2024-06-21 17:37:52,528 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 32 predicate places. [2024-06-21 17:37:52,529 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 81 transitions, 679 flow [2024-06-21 17:37:52,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:37:52,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:37:52,529 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:37:52,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 17:37:52,529 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:37:52,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:37:52,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1281327813, now seen corresponding path program 3 times [2024-06-21 17:37:52,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:37:52,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480387762] [2024-06-21 17:37:52,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:37:52,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:37:52,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:37:53,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:37:53,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:37:53,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480387762] [2024-06-21 17:37:53,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480387762] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:37:53,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:37:53,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:37:53,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448972188] [2024-06-21 17:37:53,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:37:53,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:37:53,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:37:53,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:37:53,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:37:53,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:37:53,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 81 transitions, 679 flow. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:37:53,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:37:53,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:37:53,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:37:55,130 INFO L124 PetriNetUnfolderBase]: 1499/2298 cut-off events. [2024-06-21 17:37:55,131 INFO L125 PetriNetUnfolderBase]: For 12900/12912 co-relation queries the response was YES. [2024-06-21 17:37:55,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9165 conditions, 2298 events. 1499/2298 cut-off events. For 12900/12912 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 11027 event pairs, 536 based on Foata normal form. 18/2312 useless extension candidates. Maximal degree in co-relation 9132. Up to 2045 conditions per place. [2024-06-21 17:37:55,143 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 59 selfloop transitions, 39 changer transitions 0/103 dead transitions. [2024-06-21 17:37:55,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 103 transitions, 941 flow [2024-06-21 17:37:55,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:37:55,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:37:55,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 111 transitions. [2024-06-21 17:37:55,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-21 17:37:55,145 INFO L175 Difference]: Start difference. First operand has 76 places, 81 transitions, 679 flow. Second operand 6 states and 111 transitions. [2024-06-21 17:37:55,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 103 transitions, 941 flow [2024-06-21 17:37:55,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 103 transitions, 866 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-21 17:37:55,155 INFO L231 Difference]: Finished difference. Result has 78 places, 81 transitions, 693 flow [2024-06-21 17:37:55,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=604, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=693, PETRI_PLACES=78, PETRI_TRANSITIONS=81} [2024-06-21 17:37:55,157 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 34 predicate places. [2024-06-21 17:37:55,158 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 81 transitions, 693 flow [2024-06-21 17:37:55,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:37:55,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:37:55,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:37:55,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 17:37:55,159 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:37:55,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:37:55,159 INFO L85 PathProgramCache]: Analyzing trace with hash 840857047, now seen corresponding path program 1 times [2024-06-21 17:37:55,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:37:55,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837095006] [2024-06-21 17:37:55,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:37:55,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:37:55,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:37:57,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:37:57,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:37:57,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837095006] [2024-06-21 17:37:57,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837095006] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:37:57,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:37:57,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:37:57,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103356815] [2024-06-21 17:37:57,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:37:57,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:37:57,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:37:57,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:37:57,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:37:57,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:37:57,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 81 transitions, 693 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) [2024-06-21 17:37:57,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:37:57,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:37:57,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:37:58,266 INFO L124 PetriNetUnfolderBase]: 1491/2291 cut-off events. [2024-06-21 17:37:58,266 INFO L125 PetriNetUnfolderBase]: For 12881/12883 co-relation queries the response was YES. [2024-06-21 17:37:58,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9088 conditions, 2291 events. 1491/2291 cut-off events. For 12881/12883 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 11023 event pairs, 525 based on Foata normal form. 6/2296 useless extension candidates. Maximal degree in co-relation 9055. Up to 2175 conditions per place. [2024-06-21 17:37:58,279 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 87 selfloop transitions, 12 changer transitions 0/104 dead transitions. [2024-06-21 17:37:58,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 104 transitions, 967 flow [2024-06-21 17:37:58,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:37:58,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:37:58,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-21 17:37:58,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-21 17:37:58,280 INFO L175 Difference]: Start difference. First operand has 78 places, 81 transitions, 693 flow. Second operand 6 states and 108 transitions. [2024-06-21 17:37:58,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 104 transitions, 967 flow [2024-06-21 17:37:58,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 104 transitions, 798 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-21 17:37:58,290 INFO L231 Difference]: Finished difference. Result has 76 places, 83 transitions, 577 flow [2024-06-21 17:37:58,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=524, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=577, PETRI_PLACES=76, PETRI_TRANSITIONS=83} [2024-06-21 17:37:58,290 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 32 predicate places. [2024-06-21 17:37:58,290 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 83 transitions, 577 flow [2024-06-21 17:37:58,291 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) [2024-06-21 17:37:58,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:37:58,291 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:37:58,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 17:37:58,291 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:37:58,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:37:58,292 INFO L85 PathProgramCache]: Analyzing trace with hash 836758438, now seen corresponding path program 1 times [2024-06-21 17:37:58,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:37:58,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162027705] [2024-06-21 17:37:58,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:37:58,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:37:58,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:38:00,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:38:00,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:38:00,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162027705] [2024-06-21 17:38:00,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162027705] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:38:00,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:38:00,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:38:00,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563656321] [2024-06-21 17:38:00,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:38:00,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:38:00,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:38:00,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:38:00,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:38:00,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:38:00,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 83 transitions, 577 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:38:00,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:38:00,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:38:00,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:38:01,803 INFO L124 PetriNetUnfolderBase]: 1540/2372 cut-off events. [2024-06-21 17:38:01,804 INFO L125 PetriNetUnfolderBase]: For 13309/13309 co-relation queries the response was YES. [2024-06-21 17:38:01,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9447 conditions, 2372 events. 1540/2372 cut-off events. For 13309/13309 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 11511 event pairs, 525 based on Foata normal form. 2/2373 useless extension candidates. Maximal degree in co-relation 9415. Up to 2209 conditions per place. [2024-06-21 17:38:01,818 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 105 selfloop transitions, 19 changer transitions 0/129 dead transitions. [2024-06-21 17:38:01,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 129 transitions, 1029 flow [2024-06-21 17:38:01,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:38:01,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:38:01,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-21 17:38:01,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-21 17:38:01,820 INFO L175 Difference]: Start difference. First operand has 76 places, 83 transitions, 577 flow. Second operand 8 states and 149 transitions. [2024-06-21 17:38:01,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 129 transitions, 1029 flow [2024-06-21 17:38:01,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 129 transitions, 994 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-21 17:38:01,830 INFO L231 Difference]: Finished difference. Result has 81 places, 89 transitions, 650 flow [2024-06-21 17:38:01,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=542, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=650, PETRI_PLACES=81, PETRI_TRANSITIONS=89} [2024-06-21 17:38:01,831 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 37 predicate places. [2024-06-21 17:38:01,831 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 89 transitions, 650 flow [2024-06-21 17:38:01,831 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) [2024-06-21 17:38:01,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:38:01,831 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:38:01,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 17:38:01,831 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:38:01,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:38:01,832 INFO L85 PathProgramCache]: Analyzing trace with hash 841520038, now seen corresponding path program 2 times [2024-06-21 17:38:01,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:38:01,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61815099] [2024-06-21 17:38:01,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:38:01,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:38:01,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:38:03,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:38:03,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:38:03,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61815099] [2024-06-21 17:38:03,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61815099] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:38:03,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:38:03,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:38:03,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115169800] [2024-06-21 17:38:03,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:38:03,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:38:03,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:38:03,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:38:03,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:38:03,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:38:03,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 89 transitions, 650 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:38:03,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:38:03,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:38:03,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:38:05,205 INFO L124 PetriNetUnfolderBase]: 1553/2399 cut-off events. [2024-06-21 17:38:05,205 INFO L125 PetriNetUnfolderBase]: For 16576/16576 co-relation queries the response was YES. [2024-06-21 17:38:05,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10171 conditions, 2399 events. 1553/2399 cut-off events. For 16576/16576 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 11750 event pairs, 485 based on Foata normal form. 2/2399 useless extension candidates. Maximal degree in co-relation 10137. Up to 1935 conditions per place. [2024-06-21 17:38:05,218 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 79 selfloop transitions, 45 changer transitions 0/129 dead transitions. [2024-06-21 17:38:05,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 129 transitions, 1108 flow [2024-06-21 17:38:05,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:38:05,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:38:05,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-21 17:38:05,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45182724252491696 [2024-06-21 17:38:05,220 INFO L175 Difference]: Start difference. First operand has 81 places, 89 transitions, 650 flow. Second operand 7 states and 136 transitions. [2024-06-21 17:38:05,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 129 transitions, 1108 flow [2024-06-21 17:38:05,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 129 transitions, 1049 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-21 17:38:05,234 INFO L231 Difference]: Finished difference. Result has 83 places, 95 transitions, 791 flow [2024-06-21 17:38:05,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=591, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=791, PETRI_PLACES=83, PETRI_TRANSITIONS=95} [2024-06-21 17:38:05,235 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 39 predicate places. [2024-06-21 17:38:05,235 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 95 transitions, 791 flow [2024-06-21 17:38:05,235 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) [2024-06-21 17:38:05,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:38:05,235 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:38:05,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 17:38:05,236 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:38:05,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:38:05,236 INFO L85 PathProgramCache]: Analyzing trace with hash 288178184, now seen corresponding path program 3 times [2024-06-21 17:38:05,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:38:05,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346155456] [2024-06-21 17:38:05,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:38:05,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:38:05,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:38:07,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:38:07,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:38:07,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346155456] [2024-06-21 17:38:07,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346155456] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:38:07,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:38:07,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:38:07,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390958330] [2024-06-21 17:38:07,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:38:07,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:38:07,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:38:07,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:38:07,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:38:07,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:38:07,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 95 transitions, 791 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:38:07,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:38:07,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:38:07,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:38:08,544 INFO L124 PetriNetUnfolderBase]: 1548/2368 cut-off events. [2024-06-21 17:38:08,545 INFO L125 PetriNetUnfolderBase]: For 20169/20169 co-relation queries the response was YES. [2024-06-21 17:38:08,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10933 conditions, 2368 events. 1548/2368 cut-off events. For 20169/20169 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 11528 event pairs, 536 based on Foata normal form. 2/2357 useless extension candidates. Maximal degree in co-relation 10898. Up to 1932 conditions per place. [2024-06-21 17:38:08,558 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 71 selfloop transitions, 50 changer transitions 0/126 dead transitions. [2024-06-21 17:38:08,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 126 transitions, 1203 flow [2024-06-21 17:38:08,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:38:08,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:38:08,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-21 17:38:08,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318936877076412 [2024-06-21 17:38:08,560 INFO L175 Difference]: Start difference. First operand has 83 places, 95 transitions, 791 flow. Second operand 7 states and 130 transitions. [2024-06-21 17:38:08,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 126 transitions, 1203 flow [2024-06-21 17:38:08,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 126 transitions, 1142 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-21 17:38:08,575 INFO L231 Difference]: Finished difference. Result has 87 places, 98 transitions, 881 flow [2024-06-21 17:38:08,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=732, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=881, PETRI_PLACES=87, PETRI_TRANSITIONS=98} [2024-06-21 17:38:08,576 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 43 predicate places. [2024-06-21 17:38:08,576 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 98 transitions, 881 flow [2024-06-21 17:38:08,576 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) [2024-06-21 17:38:08,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:38:08,577 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:38:08,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 17:38:08,577 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:38:08,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:38:08,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1459900026, now seen corresponding path program 1 times [2024-06-21 17:38:08,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:38:08,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710508705] [2024-06-21 17:38:08,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:38:08,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:38:08,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:38:10,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:38:10,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:38:10,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710508705] [2024-06-21 17:38:10,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710508705] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:38:10,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:38:10,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 17:38:10,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997009770] [2024-06-21 17:38:10,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:38:10,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 17:38:10,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:38:10,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 17:38:10,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 17:38:10,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:38:10,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 98 transitions, 881 flow. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:38:10,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:38:10,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:38:10,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:38:11,125 INFO L124 PetriNetUnfolderBase]: 1545/2395 cut-off events. [2024-06-21 17:38:11,125 INFO L125 PetriNetUnfolderBase]: For 21591/21591 co-relation queries the response was YES. [2024-06-21 17:38:11,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11070 conditions, 2395 events. 1545/2395 cut-off events. For 21591/21591 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 11753 event pairs, 534 based on Foata normal form. 1/2395 useless extension candidates. Maximal degree in co-relation 11033. Up to 2306 conditions per place. [2024-06-21 17:38:11,140 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 98 selfloop transitions, 8 changer transitions 0/111 dead transitions. [2024-06-21 17:38:11,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 111 transitions, 1139 flow [2024-06-21 17:38:11,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 17:38:11,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 17:38:11,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 85 transitions. [2024-06-21 17:38:11,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-21 17:38:11,142 INFO L175 Difference]: Start difference. First operand has 87 places, 98 transitions, 881 flow. Second operand 5 states and 85 transitions. [2024-06-21 17:38:11,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 111 transitions, 1139 flow [2024-06-21 17:38:11,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 111 transitions, 1053 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-21 17:38:11,159 INFO L231 Difference]: Finished difference. Result has 88 places, 101 transitions, 841 flow [2024-06-21 17:38:11,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=795, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=841, PETRI_PLACES=88, PETRI_TRANSITIONS=101} [2024-06-21 17:38:11,161 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 44 predicate places. [2024-06-21 17:38:11,161 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 101 transitions, 841 flow [2024-06-21 17:38:11,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:38:11,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:38:11,161 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:38:11,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 17:38:11,162 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:38:11,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:38:11,162 INFO L85 PathProgramCache]: Analyzing trace with hash 169709948, now seen corresponding path program 1 times [2024-06-21 17:38:11,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:38:11,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843812091] [2024-06-21 17:38:11,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:38:11,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:38:11,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:38:13,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:38:13,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:38:13,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843812091] [2024-06-21 17:38:13,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843812091] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:38:13,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:38:13,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:38:13,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749949501] [2024-06-21 17:38:13,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:38:13,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:38:13,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:38:13,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:38:13,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:38:13,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:38:13,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 101 transitions, 841 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:38:13,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:38:13,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:38:13,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:38:14,428 INFO L124 PetriNetUnfolderBase]: 1535/2378 cut-off events. [2024-06-21 17:38:14,428 INFO L125 PetriNetUnfolderBase]: For 23613/23613 co-relation queries the response was YES. [2024-06-21 17:38:14,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11134 conditions, 2378 events. 1535/2378 cut-off events. For 23613/23613 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 11692 event pairs, 522 based on Foata normal form. 4/2381 useless extension candidates. Maximal degree in co-relation 11095. Up to 2209 conditions per place. [2024-06-21 17:38:14,443 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 115 selfloop transitions, 19 changer transitions 0/139 dead transitions. [2024-06-21 17:38:14,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 139 transitions, 1219 flow [2024-06-21 17:38:14,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:38:14,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:38:14,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-21 17:38:14,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-21 17:38:14,445 INFO L175 Difference]: Start difference. First operand has 88 places, 101 transitions, 841 flow. Second operand 8 states and 147 transitions. [2024-06-21 17:38:14,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 139 transitions, 1219 flow [2024-06-21 17:38:14,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 139 transitions, 1185 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-21 17:38:14,463 INFO L231 Difference]: Finished difference. Result has 93 places, 101 transitions, 853 flow [2024-06-21 17:38:14,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=807, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=853, PETRI_PLACES=93, PETRI_TRANSITIONS=101} [2024-06-21 17:38:14,464 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 49 predicate places. [2024-06-21 17:38:14,464 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 101 transitions, 853 flow [2024-06-21 17:38:14,464 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) [2024-06-21 17:38:14,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:38:14,465 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:38:14,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 17:38:14,465 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:38:14,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:38:14,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1426981192, now seen corresponding path program 2 times [2024-06-21 17:38:14,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:38:14,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617240695] [2024-06-21 17:38:14,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:38:14,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:38:14,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:38:16,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:38:16,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:38:16,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617240695] [2024-06-21 17:38:16,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617240695] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:38:16,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:38:16,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:38:16,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485802771] [2024-06-21 17:38:16,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:38:16,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:38:16,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:38:16,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:38:16,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:38:16,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:38:16,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 101 transitions, 853 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:38:16,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:38:16,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:38:16,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:38:17,902 INFO L124 PetriNetUnfolderBase]: 1597/2483 cut-off events. [2024-06-21 17:38:17,903 INFO L125 PetriNetUnfolderBase]: For 27319/27323 co-relation queries the response was YES. [2024-06-21 17:38:17,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11895 conditions, 2483 events. 1597/2483 cut-off events. For 27319/27323 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 12372 event pairs, 474 based on Foata normal form. 8/2489 useless extension candidates. Maximal degree in co-relation 11855. Up to 1972 conditions per place. [2024-06-21 17:38:17,914 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 84 selfloop transitions, 55 changer transitions 0/144 dead transitions. [2024-06-21 17:38:17,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 144 transitions, 1425 flow [2024-06-21 17:38:17,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:38:17,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:38:17,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-21 17:38:17,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-21 17:38:17,916 INFO L175 Difference]: Start difference. First operand has 93 places, 101 transitions, 853 flow. Second operand 7 states and 140 transitions. [2024-06-21 17:38:17,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 144 transitions, 1425 flow [2024-06-21 17:38:17,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 144 transitions, 1387 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 17:38:17,930 INFO L231 Difference]: Finished difference. Result has 93 places, 107 transitions, 1011 flow [2024-06-21 17:38:17,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=815, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1011, PETRI_PLACES=93, PETRI_TRANSITIONS=107} [2024-06-21 17:38:17,931 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 49 predicate places. [2024-06-21 17:38:17,931 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 107 transitions, 1011 flow [2024-06-21 17:38:17,931 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) [2024-06-21 17:38:17,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:38:17,932 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:38:17,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 17:38:17,932 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:38:17,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:38:17,932 INFO L85 PathProgramCache]: Analyzing trace with hash 759468112, now seen corresponding path program 3 times [2024-06-21 17:38:17,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:38:17,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224187927] [2024-06-21 17:38:17,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:38:17,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:38:17,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:38:20,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:38:20,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:38:20,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224187927] [2024-06-21 17:38:20,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224187927] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:38:20,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:38:20,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:38:20,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513801274] [2024-06-21 17:38:20,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:38:20,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:38:20,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:38:20,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:38:20,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:38:20,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:38:20,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 107 transitions, 1011 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:38:20,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:38:20,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:38:20,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:38:21,872 INFO L124 PetriNetUnfolderBase]: 1623/2514 cut-off events. [2024-06-21 17:38:21,873 INFO L125 PetriNetUnfolderBase]: For 31361/31361 co-relation queries the response was YES. [2024-06-21 17:38:21,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12510 conditions, 2514 events. 1623/2514 cut-off events. For 31361/31361 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 12466 event pairs, 483 based on Foata normal form. 4/2516 useless extension candidates. Maximal degree in co-relation 12469. Up to 1994 conditions per place. [2024-06-21 17:38:21,887 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 88 selfloop transitions, 56 changer transitions 0/149 dead transitions. [2024-06-21 17:38:21,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 149 transitions, 1515 flow [2024-06-21 17:38:21,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:38:21,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:38:21,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-21 17:38:21,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44476744186046513 [2024-06-21 17:38:21,890 INFO L175 Difference]: Start difference. First operand has 93 places, 107 transitions, 1011 flow. Second operand 8 states and 153 transitions. [2024-06-21 17:38:21,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 149 transitions, 1515 flow [2024-06-21 17:38:21,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 149 transitions, 1439 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-21 17:38:21,922 INFO L231 Difference]: Finished difference. Result has 98 places, 110 transitions, 1099 flow [2024-06-21 17:38:21,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=938, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1099, PETRI_PLACES=98, PETRI_TRANSITIONS=110} [2024-06-21 17:38:21,922 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 54 predicate places. [2024-06-21 17:38:21,923 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 110 transitions, 1099 flow [2024-06-21 17:38:21,923 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) [2024-06-21 17:38:21,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:38:21,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:38:21,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 17:38:21,923 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:38:21,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:38:21,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1390049878, now seen corresponding path program 1 times [2024-06-21 17:38:21,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:38:21,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370231629] [2024-06-21 17:38:21,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:38:21,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:38:21,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:38:24,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:38:24,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:38:24,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370231629] [2024-06-21 17:38:24,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370231629] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:38:24,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:38:24,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:38:24,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004775627] [2024-06-21 17:38:24,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:38:24,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:38:24,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:38:24,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:38:24,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:38:24,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:38:24,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 110 transitions, 1099 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 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) [2024-06-21 17:38:24,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:38:24,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:38:24,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:38:25,571 INFO L124 PetriNetUnfolderBase]: 1643/2553 cut-off events. [2024-06-21 17:38:25,571 INFO L125 PetriNetUnfolderBase]: For 35304/35308 co-relation queries the response was YES. [2024-06-21 17:38:25,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12849 conditions, 2553 events. 1643/2553 cut-off events. For 35304/35308 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 12704 event pairs, 485 based on Foata normal form. 8/2559 useless extension candidates. Maximal degree in co-relation 12807. Up to 2226 conditions per place. [2024-06-21 17:38:25,587 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 97 selfloop transitions, 42 changer transitions 0/144 dead transitions. [2024-06-21 17:38:25,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 144 transitions, 1487 flow [2024-06-21 17:38:25,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:38:25,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:38:25,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-21 17:38:25,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-21 17:38:25,589 INFO L175 Difference]: Start difference. First operand has 98 places, 110 transitions, 1099 flow. Second operand 7 states and 133 transitions. [2024-06-21 17:38:25,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 144 transitions, 1487 flow [2024-06-21 17:38:25,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 144 transitions, 1355 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-21 17:38:25,613 INFO L231 Difference]: Finished difference. Result has 99 places, 112 transitions, 1084 flow [2024-06-21 17:38:25,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=967, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1084, PETRI_PLACES=99, PETRI_TRANSITIONS=112} [2024-06-21 17:38:25,613 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 55 predicate places. [2024-06-21 17:38:25,613 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 112 transitions, 1084 flow [2024-06-21 17:38:25,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 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) [2024-06-21 17:38:25,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:38:25,614 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:38:25,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 17:38:25,614 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:38:25,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:38:25,614 INFO L85 PathProgramCache]: Analyzing trace with hash 600299158, now seen corresponding path program 4 times [2024-06-21 17:38:25,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:38:25,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258853276] [2024-06-21 17:38:25,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:38:25,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:38:25,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:38:27,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:38:27,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:38:27,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258853276] [2024-06-21 17:38:27,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258853276] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:38:27,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:38:27,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:38:27,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219590502] [2024-06-21 17:38:27,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:38:27,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:38:27,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:38:27,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:38:27,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:38:27,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:38:27,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 112 transitions, 1084 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) [2024-06-21 17:38:27,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:38:27,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:38:27,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:38:28,941 INFO L124 PetriNetUnfolderBase]: 1633/2523 cut-off events. [2024-06-21 17:38:28,942 INFO L125 PetriNetUnfolderBase]: For 37835/37843 co-relation queries the response was YES. [2024-06-21 17:38:28,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12901 conditions, 2523 events. 1633/2523 cut-off events. For 37835/37843 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 12553 event pairs, 507 based on Foata normal form. 12/2529 useless extension candidates. Maximal degree in co-relation 12858. Up to 2018 conditions per place. [2024-06-21 17:38:28,954 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 81 selfloop transitions, 56 changer transitions 0/142 dead transitions. [2024-06-21 17:38:28,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 142 transitions, 1514 flow [2024-06-21 17:38:28,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:38:28,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:38:28,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-21 17:38:28,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43853820598006643 [2024-06-21 17:38:28,955 INFO L175 Difference]: Start difference. First operand has 99 places, 112 transitions, 1084 flow. Second operand 7 states and 132 transitions. [2024-06-21 17:38:28,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 142 transitions, 1514 flow [2024-06-21 17:38:28,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 142 transitions, 1413 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-21 17:38:28,979 INFO L231 Difference]: Finished difference. Result has 101 places, 112 transitions, 1104 flow [2024-06-21 17:38:28,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=983, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1104, PETRI_PLACES=101, PETRI_TRANSITIONS=112} [2024-06-21 17:38:28,980 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 57 predicate places. [2024-06-21 17:38:28,980 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 112 transitions, 1104 flow [2024-06-21 17:38:28,980 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) [2024-06-21 17:38:28,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:38:28,980 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:38:28,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 17:38:28,980 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:38:28,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:38:28,981 INFO L85 PathProgramCache]: Analyzing trace with hash 343591258, now seen corresponding path program 5 times [2024-06-21 17:38:28,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:38:28,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353475603] [2024-06-21 17:38:28,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:38:28,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:38:28,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:38:31,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:38:31,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:38:31,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353475603] [2024-06-21 17:38:31,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353475603] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:38:31,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:38:31,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:38:31,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617468332] [2024-06-21 17:38:31,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:38:31,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:38:31,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:38:31,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:38:31,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:38:31,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:38:31,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 112 transitions, 1104 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) [2024-06-21 17:38:31,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:38:31,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:38:31,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:38:33,047 INFO L124 PetriNetUnfolderBase]: 1623/2493 cut-off events. [2024-06-21 17:38:33,047 INFO L125 PetriNetUnfolderBase]: For 40821/40821 co-relation queries the response was YES. [2024-06-21 17:38:33,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12977 conditions, 2493 events. 1623/2493 cut-off events. For 40821/40821 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 12302 event pairs, 562 based on Foata normal form. 4/2484 useless extension candidates. Maximal degree in co-relation 12933. Up to 2010 conditions per place. [2024-06-21 17:38:33,060 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 80 selfloop transitions, 59 changer transitions 0/144 dead transitions. [2024-06-21 17:38:33,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 144 transitions, 1476 flow [2024-06-21 17:38:33,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:38:33,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:38:33,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 17:38:33,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42151162790697677 [2024-06-21 17:38:33,062 INFO L175 Difference]: Start difference. First operand has 101 places, 112 transitions, 1104 flow. Second operand 8 states and 145 transitions. [2024-06-21 17:38:33,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 144 transitions, 1476 flow [2024-06-21 17:38:33,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 144 transitions, 1272 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-21 17:38:33,088 INFO L231 Difference]: Finished difference. Result has 102 places, 112 transitions, 1026 flow [2024-06-21 17:38:33,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=900, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1026, PETRI_PLACES=102, PETRI_TRANSITIONS=112} [2024-06-21 17:38:33,088 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 58 predicate places. [2024-06-21 17:38:33,088 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 112 transitions, 1026 flow [2024-06-21 17:38:33,088 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) [2024-06-21 17:38:33,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:38:33,088 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:38:33,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 17:38:33,088 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:38:33,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:38:33,089 INFO L85 PathProgramCache]: Analyzing trace with hash 597333864, now seen corresponding path program 2 times [2024-06-21 17:38:33,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:38:33,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973997552] [2024-06-21 17:38:33,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:38:33,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:38:33,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:38:35,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:38:35,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:38:35,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973997552] [2024-06-21 17:38:35,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973997552] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:38:35,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:38:35,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:38:35,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505303410] [2024-06-21 17:38:35,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:38:35,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:38:35,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:38:35,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:38:35,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:38:35,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:38:35,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 112 transitions, 1026 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 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) [2024-06-21 17:38:35,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:38:35,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:38:35,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:38:36,348 INFO L124 PetriNetUnfolderBase]: 1643/2563 cut-off events. [2024-06-21 17:38:36,348 INFO L125 PetriNetUnfolderBase]: For 42583/42591 co-relation queries the response was YES. [2024-06-21 17:38:36,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13224 conditions, 2563 events. 1643/2563 cut-off events. For 42583/42591 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 12857 event pairs, 496 based on Foata normal form. 12/2571 useless extension candidates. Maximal degree in co-relation 13180. Up to 2236 conditions per place. [2024-06-21 17:38:36,362 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 96 selfloop transitions, 41 changer transitions 0/142 dead transitions. [2024-06-21 17:38:36,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 142 transitions, 1406 flow [2024-06-21 17:38:36,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:38:36,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:38:36,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-21 17:38:36,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4219269102990033 [2024-06-21 17:38:36,364 INFO L175 Difference]: Start difference. First operand has 102 places, 112 transitions, 1026 flow. Second operand 7 states and 127 transitions. [2024-06-21 17:38:36,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 142 transitions, 1406 flow [2024-06-21 17:38:36,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 142 transitions, 1173 flow, removed 5 selfloop flow, removed 11 redundant places. [2024-06-21 17:38:36,391 INFO L231 Difference]: Finished difference. Result has 98 places, 114 transitions, 911 flow [2024-06-21 17:38:36,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=793, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=911, PETRI_PLACES=98, PETRI_TRANSITIONS=114} [2024-06-21 17:38:36,392 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 54 predicate places. [2024-06-21 17:38:36,392 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 114 transitions, 911 flow [2024-06-21 17:38:36,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 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) [2024-06-21 17:38:36,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:38:36,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:38:36,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 17:38:36,392 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)] === [2024-06-21 17:38:36,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:38:36,392 INFO L85 PathProgramCache]: Analyzing trace with hash 609830294, now seen corresponding path program 3 times [2024-06-21 17:38:36,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:38:36,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219189067] [2024-06-21 17:38:36,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:38:36,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:38:36,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:38:38,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:38:38,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:38:38,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219189067] [2024-06-21 17:38:38,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219189067] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:38:38,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:38:38,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:38:38,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946942398] [2024-06-21 17:38:38,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:38:38,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:38:38,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:38:38,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:38:38,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:38:38,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:38:38,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 114 transitions, 911 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 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) [2024-06-21 17:38:38,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:38:38,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:38:38,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:38:39,419 INFO L124 PetriNetUnfolderBase]: 1635/2545 cut-off events. [2024-06-21 17:38:39,419 INFO L125 PetriNetUnfolderBase]: For 44750/44758 co-relation queries the response was YES. [2024-06-21 17:38:39,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12991 conditions, 2545 events. 1635/2545 cut-off events. For 44750/44758 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 12726 event pairs, 468 based on Foata normal form. 12/2553 useless extension candidates. Maximal degree in co-relation 12949. Up to 2142 conditions per place. [2024-06-21 17:38:39,432 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 93 selfloop transitions, 46 changer transitions 0/144 dead transitions. [2024-06-21 17:38:39,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 144 transitions, 1297 flow [2024-06-21 17:38:39,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:38:39,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:38:39,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-21 17:38:39,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4219269102990033 [2024-06-21 17:38:39,433 INFO L175 Difference]: Start difference. First operand has 98 places, 114 transitions, 911 flow. Second operand 7 states and 127 transitions. [2024-06-21 17:38:39,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 144 transitions, 1297 flow [2024-06-21 17:38:39,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 144 transitions, 1199 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-21 17:38:39,458 INFO L231 Difference]: Finished difference. Result has 100 places, 116 transitions, 944 flow [2024-06-21 17:38:39,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=813, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=944, PETRI_PLACES=100, PETRI_TRANSITIONS=116} [2024-06-21 17:38:39,458 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 56 predicate places. [2024-06-21 17:38:39,458 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 116 transitions, 944 flow [2024-06-21 17:38:39,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 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) [2024-06-21 17:38:39,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:38:39,458 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:38:39,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 17:38:39,459 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:38:39,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:38:39,459 INFO L85 PathProgramCache]: Analyzing trace with hash 1951098552, now seen corresponding path program 1 times [2024-06-21 17:38:39,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:38:39,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678688865] [2024-06-21 17:38:39,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:38:39,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:38:39,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:38:41,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:38:41,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:38:41,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678688865] [2024-06-21 17:38:41,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678688865] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:38:41,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:38:41,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:38:41,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767784421] [2024-06-21 17:38:41,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:38:41,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:38:41,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:38:41,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:38:41,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:38:41,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:38:41,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 116 transitions, 944 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) [2024-06-21 17:38:41,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:38:41,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:38:41,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:38:42,637 INFO L124 PetriNetUnfolderBase]: 1657/2582 cut-off events. [2024-06-21 17:38:42,638 INFO L125 PetriNetUnfolderBase]: For 48675/48675 co-relation queries the response was YES. [2024-06-21 17:38:42,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13390 conditions, 2582 events. 1657/2582 cut-off events. For 48675/48675 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 12874 event pairs, 529 based on Foata normal form. 6/2582 useless extension candidates. Maximal degree in co-relation 13347. Up to 2356 conditions per place. [2024-06-21 17:38:42,657 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 116 selfloop transitions, 20 changer transitions 0/141 dead transitions. [2024-06-21 17:38:42,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 141 transitions, 1372 flow [2024-06-21 17:38:42,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:38:42,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:38:42,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-21 17:38:42,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41472868217054265 [2024-06-21 17:38:42,659 INFO L175 Difference]: Start difference. First operand has 100 places, 116 transitions, 944 flow. Second operand 6 states and 107 transitions. [2024-06-21 17:38:42,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 141 transitions, 1372 flow [2024-06-21 17:38:42,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 141 transitions, 1259 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-21 17:38:42,709 INFO L231 Difference]: Finished difference. Result has 102 places, 124 transitions, 950 flow [2024-06-21 17:38:42,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=831, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=950, PETRI_PLACES=102, PETRI_TRANSITIONS=124} [2024-06-21 17:38:42,710 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 58 predicate places. [2024-06-21 17:38:42,710 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 124 transitions, 950 flow [2024-06-21 17:38:42,710 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) [2024-06-21 17:38:42,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:38:42,710 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:38:42,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 17:38:42,711 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:38:42,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:38:42,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1274210513, now seen corresponding path program 1 times [2024-06-21 17:38:42,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:38:42,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565697637] [2024-06-21 17:38:42,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:38:42,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:38:42,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:38:44,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:38:44,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:38:44,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565697637] [2024-06-21 17:38:44,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565697637] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:38:44,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:38:44,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:38:44,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852599257] [2024-06-21 17:38:44,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:38:44,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:38:44,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:38:44,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:38:44,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:38:44,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:38:44,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 124 transitions, 950 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) [2024-06-21 17:38:44,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:38:44,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:38:44,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:38:45,734 INFO L124 PetriNetUnfolderBase]: 1905/2990 cut-off events. [2024-06-21 17:38:45,734 INFO L125 PetriNetUnfolderBase]: For 59788/59788 co-relation queries the response was YES. [2024-06-21 17:38:45,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16049 conditions, 2990 events. 1905/2990 cut-off events. For 59788/59788 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 15589 event pairs, 584 based on Foata normal form. 4/2993 useless extension candidates. Maximal degree in co-relation 16004. Up to 2445 conditions per place. [2024-06-21 17:38:45,752 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 166 selfloop transitions, 34 changer transitions 0/205 dead transitions. [2024-06-21 17:38:45,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 205 transitions, 1773 flow [2024-06-21 17:38:45,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:38:45,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:38:45,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 209 transitions. [2024-06-21 17:38:45,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-21 17:38:45,755 INFO L175 Difference]: Start difference. First operand has 102 places, 124 transitions, 950 flow. Second operand 11 states and 209 transitions. [2024-06-21 17:38:45,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 205 transitions, 1773 flow [2024-06-21 17:38:45,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 205 transitions, 1737 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-21 17:38:45,805 INFO L231 Difference]: Finished difference. Result has 114 places, 140 transitions, 1159 flow [2024-06-21 17:38:45,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=917, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1159, PETRI_PLACES=114, PETRI_TRANSITIONS=140} [2024-06-21 17:38:45,806 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 70 predicate places. [2024-06-21 17:38:45,806 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 140 transitions, 1159 flow [2024-06-21 17:38:45,806 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) [2024-06-21 17:38:45,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:38:45,806 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:38:45,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 17:38:45,807 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:38:45,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:38:45,807 INFO L85 PathProgramCache]: Analyzing trace with hash 963181349, now seen corresponding path program 2 times [2024-06-21 17:38:45,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:38:45,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690159367] [2024-06-21 17:38:45,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:38:45,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:38:45,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:38:48,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:38:48,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:38:48,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690159367] [2024-06-21 17:38:48,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690159367] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:38:48,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:38:48,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:38:48,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729258370] [2024-06-21 17:38:48,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:38:48,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:38:48,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:38:48,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:38:48,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:38:48,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:38:48,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 140 transitions, 1159 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) [2024-06-21 17:38:48,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:38:48,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:38:48,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:38:49,562 INFO L124 PetriNetUnfolderBase]: 2077/3270 cut-off events. [2024-06-21 17:38:49,562 INFO L125 PetriNetUnfolderBase]: For 75817/75817 co-relation queries the response was YES. [2024-06-21 17:38:49,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18668 conditions, 3270 events. 2077/3270 cut-off events. For 75817/75817 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 17531 event pairs, 488 based on Foata normal form. 4/3273 useless extension candidates. Maximal degree in co-relation 18618. Up to 2411 conditions per place. [2024-06-21 17:38:49,581 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 153 selfloop transitions, 36 changer transitions 0/194 dead transitions. [2024-06-21 17:38:49,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 194 transitions, 1881 flow [2024-06-21 17:38:49,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:38:49,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:38:49,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-21 17:38:49,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-21 17:38:49,583 INFO L175 Difference]: Start difference. First operand has 114 places, 140 transitions, 1159 flow. Second operand 9 states and 171 transitions. [2024-06-21 17:38:49,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 194 transitions, 1881 flow [2024-06-21 17:38:49,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 194 transitions, 1819 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-21 17:38:49,629 INFO L231 Difference]: Finished difference. Result has 119 places, 143 transitions, 1247 flow [2024-06-21 17:38:49,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1097, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1247, PETRI_PLACES=119, PETRI_TRANSITIONS=143} [2024-06-21 17:38:49,630 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 75 predicate places. [2024-06-21 17:38:49,630 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 143 transitions, 1247 flow [2024-06-21 17:38:49,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:38:49,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:38:49,630 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:38:49,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 17:38:49,631 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:38:49,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:38:49,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1463878295, now seen corresponding path program 3 times [2024-06-21 17:38:49,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:38:49,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514802230] [2024-06-21 17:38:49,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:38:49,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:38:49,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:38:52,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:38:52,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:38:52,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514802230] [2024-06-21 17:38:52,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514802230] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:38:52,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:38:52,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:38:52,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563541071] [2024-06-21 17:38:52,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:38:52,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:38:52,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:38:52,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:38:52,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:38:52,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:38:52,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 143 transitions, 1247 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) [2024-06-21 17:38:52,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:38:52,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:38:52,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:38:53,443 INFO L124 PetriNetUnfolderBase]: 2061/3244 cut-off events. [2024-06-21 17:38:53,444 INFO L125 PetriNetUnfolderBase]: For 80598/80598 co-relation queries the response was YES. [2024-06-21 17:38:53,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18793 conditions, 3244 events. 2061/3244 cut-off events. For 80598/80598 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 17411 event pairs, 640 based on Foata normal form. 8/3251 useless extension candidates. Maximal degree in co-relation 18741. Up to 2963 conditions per place. [2024-06-21 17:38:53,464 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 155 selfloop transitions, 30 changer transitions 0/190 dead transitions. [2024-06-21 17:38:53,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 190 transitions, 1837 flow [2024-06-21 17:38:53,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:38:53,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:38:53,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-21 17:38:53,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42118863049095606 [2024-06-21 17:38:53,466 INFO L175 Difference]: Start difference. First operand has 119 places, 143 transitions, 1247 flow. Second operand 9 states and 163 transitions. [2024-06-21 17:38:53,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 190 transitions, 1837 flow [2024-06-21 17:38:53,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 190 transitions, 1755 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-21 17:38:53,521 INFO L231 Difference]: Finished difference. Result has 123 places, 146 transitions, 1307 flow [2024-06-21 17:38:53,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1171, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1307, PETRI_PLACES=123, PETRI_TRANSITIONS=146} [2024-06-21 17:38:53,521 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 79 predicate places. [2024-06-21 17:38:53,521 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 146 transitions, 1307 flow [2024-06-21 17:38:53,522 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) [2024-06-21 17:38:53,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:38:53,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:38:53,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 17:38:53,522 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:38:53,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:38:53,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1081329479, now seen corresponding path program 4 times [2024-06-21 17:38:53,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:38:53,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034705145] [2024-06-21 17:38:53,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:38:53,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:38:53,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:38:55,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:38:55,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:38:55,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034705145] [2024-06-21 17:38:55,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034705145] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:38:55,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:38:55,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:38:55,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137341550] [2024-06-21 17:38:55,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:38:55,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:38:55,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:38:55,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:38:55,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:38:55,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:38:55,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 146 transitions, 1307 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) [2024-06-21 17:38:55,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:38:55,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:38:55,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:38:57,317 INFO L124 PetriNetUnfolderBase]: 2081/3270 cut-off events. [2024-06-21 17:38:57,318 INFO L125 PetriNetUnfolderBase]: For 79443/79443 co-relation queries the response was YES. [2024-06-21 17:38:57,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19005 conditions, 3270 events. 2081/3270 cut-off events. For 79443/79443 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 17509 event pairs, 537 based on Foata normal form. 4/3272 useless extension candidates. Maximal degree in co-relation 18951. Up to 2686 conditions per place. [2024-06-21 17:38:57,340 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 114 selfloop transitions, 66 changer transitions 0/185 dead transitions. [2024-06-21 17:38:57,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 185 transitions, 1838 flow [2024-06-21 17:38:57,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:38:57,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:38:57,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-21 17:38:57,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-21 17:38:57,342 INFO L175 Difference]: Start difference. First operand has 123 places, 146 transitions, 1307 flow. Second operand 8 states and 150 transitions. [2024-06-21 17:38:57,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 185 transitions, 1838 flow [2024-06-21 17:38:57,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 185 transitions, 1737 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-21 17:38:57,393 INFO L231 Difference]: Finished difference. Result has 124 places, 148 transitions, 1391 flow [2024-06-21 17:38:57,394 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1206, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1391, PETRI_PLACES=124, PETRI_TRANSITIONS=148} [2024-06-21 17:38:57,394 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 80 predicate places. [2024-06-21 17:38:57,394 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 148 transitions, 1391 flow [2024-06-21 17:38:57,394 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) [2024-06-21 17:38:57,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:38:57,395 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:38:57,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 17:38:57,395 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)] === [2024-06-21 17:38:57,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:38:57,395 INFO L85 PathProgramCache]: Analyzing trace with hash 354084441, now seen corresponding path program 1 times [2024-06-21 17:38:57,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:38:57,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234803841] [2024-06-21 17:38:57,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:38:57,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:38:57,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:38:59,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:38:59,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:38:59,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234803841] [2024-06-21 17:38:59,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234803841] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:38:59,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:38:59,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:38:59,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984932142] [2024-06-21 17:38:59,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:38:59,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:38:59,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:38:59,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:38:59,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:38:59,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:38:59,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 148 transitions, 1391 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) [2024-06-21 17:38:59,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:38:59,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:38:59,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:39:00,388 INFO L124 PetriNetUnfolderBase]: 2091/3299 cut-off events. [2024-06-21 17:39:00,389 INFO L125 PetriNetUnfolderBase]: For 84710/84710 co-relation queries the response was YES. [2024-06-21 17:39:00,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19411 conditions, 3299 events. 2091/3299 cut-off events. For 84710/84710 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 17726 event pairs, 606 based on Foata normal form. 2/3300 useless extension candidates. Maximal degree in co-relation 19356. Up to 3039 conditions per place. [2024-06-21 17:39:00,413 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 145 selfloop transitions, 26 changer transitions 0/176 dead transitions. [2024-06-21 17:39:00,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 176 transitions, 1915 flow [2024-06-21 17:39:00,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:39:00,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:39:00,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 116 transitions. [2024-06-21 17:39:00,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496124031007752 [2024-06-21 17:39:00,414 INFO L175 Difference]: Start difference. First operand has 124 places, 148 transitions, 1391 flow. Second operand 6 states and 116 transitions. [2024-06-21 17:39:00,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 176 transitions, 1915 flow [2024-06-21 17:39:00,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 176 transitions, 1748 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-21 17:39:00,472 INFO L231 Difference]: Finished difference. Result has 124 places, 151 transitions, 1313 flow [2024-06-21 17:39:00,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1224, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1313, PETRI_PLACES=124, PETRI_TRANSITIONS=151} [2024-06-21 17:39:00,472 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 80 predicate places. [2024-06-21 17:39:00,472 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 151 transitions, 1313 flow [2024-06-21 17:39:00,473 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) [2024-06-21 17:39:00,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:39:00,473 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:39:00,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 17:39:00,473 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:39:00,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:39:00,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1889491401, now seen corresponding path program 5 times [2024-06-21 17:39:00,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:39:00,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333552877] [2024-06-21 17:39:00,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:39:00,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:39:00,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:39:02,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:39:02,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:39:02,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333552877] [2024-06-21 17:39:02,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333552877] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:39:02,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:39:02,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:39:02,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650785618] [2024-06-21 17:39:02,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:39:02,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:39:02,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:39:02,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:39:02,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:39:02,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:39:02,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 151 transitions, 1313 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) [2024-06-21 17:39:02,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:39:02,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:39:02,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:39:04,345 INFO L124 PetriNetUnfolderBase]: 2083/3262 cut-off events. [2024-06-21 17:39:04,345 INFO L125 PetriNetUnfolderBase]: For 87526/87526 co-relation queries the response was YES. [2024-06-21 17:39:04,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19041 conditions, 3262 events. 2083/3262 cut-off events. For 87526/87526 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 17376 event pairs, 627 based on Foata normal form. 4/3252 useless extension candidates. Maximal degree in co-relation 18985. Up to 2688 conditions per place. [2024-06-21 17:39:04,364 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 112 selfloop transitions, 69 changer transitions 0/186 dead transitions. [2024-06-21 17:39:04,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 186 transitions, 1838 flow [2024-06-21 17:39:04,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:39:04,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:39:04,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-21 17:39:04,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-21 17:39:04,366 INFO L175 Difference]: Start difference. First operand has 124 places, 151 transitions, 1313 flow. Second operand 8 states and 144 transitions. [2024-06-21 17:39:04,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 186 transitions, 1838 flow [2024-06-21 17:39:04,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 186 transitions, 1797 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-21 17:39:04,420 INFO L231 Difference]: Finished difference. Result has 129 places, 153 transitions, 1467 flow [2024-06-21 17:39:04,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1272, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1467, PETRI_PLACES=129, PETRI_TRANSITIONS=153} [2024-06-21 17:39:04,420 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 85 predicate places. [2024-06-21 17:39:04,420 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 153 transitions, 1467 flow [2024-06-21 17:39:04,421 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) [2024-06-21 17:39:04,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:39:04,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:39:04,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 17:39:04,421 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:39:04,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:39:04,421 INFO L85 PathProgramCache]: Analyzing trace with hash 354500151, now seen corresponding path program 2 times [2024-06-21 17:39:04,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:39:04,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301511648] [2024-06-21 17:39:04,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:39:04,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:39:04,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:39:06,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:39:06,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:39:06,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301511648] [2024-06-21 17:39:06,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301511648] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:39:06,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:39:06,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:39:06,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026386220] [2024-06-21 17:39:06,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:39:06,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:39:06,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:39:06,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:39:06,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:39:06,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:39:06,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 153 transitions, 1467 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) [2024-06-21 17:39:06,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:39:06,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:39:06,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:39:07,741 INFO L124 PetriNetUnfolderBase]: 2057/3236 cut-off events. [2024-06-21 17:39:07,741 INFO L125 PetriNetUnfolderBase]: For 93454/93454 co-relation queries the response was YES. [2024-06-21 17:39:07,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19270 conditions, 3236 events. 2057/3236 cut-off events. For 93454/93454 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 17246 event pairs, 587 based on Foata normal form. 6/3234 useless extension candidates. Maximal degree in co-relation 19213. Up to 3008 conditions per place. [2024-06-21 17:39:07,763 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 139 selfloop transitions, 25 changer transitions 0/169 dead transitions. [2024-06-21 17:39:07,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 169 transitions, 1861 flow [2024-06-21 17:39:07,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:39:07,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:39:07,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-21 17:39:07,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4108527131782946 [2024-06-21 17:39:07,764 INFO L175 Difference]: Start difference. First operand has 129 places, 153 transitions, 1467 flow. Second operand 6 states and 106 transitions. [2024-06-21 17:39:07,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 169 transitions, 1861 flow [2024-06-21 17:39:07,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 169 transitions, 1672 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-21 17:39:07,834 INFO L231 Difference]: Finished difference. Result has 129 places, 153 transitions, 1336 flow [2024-06-21 17:39:07,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1278, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1336, PETRI_PLACES=129, PETRI_TRANSITIONS=153} [2024-06-21 17:39:07,834 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 85 predicate places. [2024-06-21 17:39:07,834 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 153 transitions, 1336 flow [2024-06-21 17:39:07,834 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) [2024-06-21 17:39:07,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:39:07,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:39:07,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 17:39:07,835 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:39:07,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:39:07,835 INFO L85 PathProgramCache]: Analyzing trace with hash 348793175, now seen corresponding path program 1 times [2024-06-21 17:39:07,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:39:07,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269653630] [2024-06-21 17:39:07,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:39:07,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:39:07,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:39:09,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:39:09,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:39:09,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269653630] [2024-06-21 17:39:09,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269653630] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:39:09,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:39:09,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:39:09,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040654073] [2024-06-21 17:39:09,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:39:09,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:39:09,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:39:09,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:39:09,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:39:09,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:39:09,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 153 transitions, 1336 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) [2024-06-21 17:39:09,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:39:09,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:39:09,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:39:10,942 INFO L124 PetriNetUnfolderBase]: 2062/3250 cut-off events. [2024-06-21 17:39:10,942 INFO L125 PetriNetUnfolderBase]: For 94301/94301 co-relation queries the response was YES. [2024-06-21 17:39:10,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19063 conditions, 3250 events. 2062/3250 cut-off events. For 94301/94301 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 17433 event pairs, 645 based on Foata normal form. 1/3249 useless extension candidates. Maximal degree in co-relation 19005. Up to 3079 conditions per place. [2024-06-21 17:39:10,967 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 154 selfloop transitions, 21 changer transitions 0/180 dead transitions. [2024-06-21 17:39:10,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 180 transitions, 1964 flow [2024-06-21 17:39:10,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:39:10,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:39:10,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-21 17:39:10,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41472868217054265 [2024-06-21 17:39:10,969 INFO L175 Difference]: Start difference. First operand has 129 places, 153 transitions, 1336 flow. Second operand 6 states and 107 transitions. [2024-06-21 17:39:10,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 180 transitions, 1964 flow [2024-06-21 17:39:11,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 180 transitions, 1889 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-21 17:39:11,024 INFO L231 Difference]: Finished difference. Result has 130 places, 162 transitions, 1435 flow [2024-06-21 17:39:11,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1261, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1435, PETRI_PLACES=130, PETRI_TRANSITIONS=162} [2024-06-21 17:39:11,025 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 86 predicate places. [2024-06-21 17:39:11,025 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 162 transitions, 1435 flow [2024-06-21 17:39:11,025 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) [2024-06-21 17:39:11,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:39:11,025 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:39:11,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 17:39:11,026 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:39:11,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:39:11,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1527974585, now seen corresponding path program 2 times [2024-06-21 17:39:11,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:39:11,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619271304] [2024-06-21 17:39:11,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:39:11,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:39:11,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:39:13,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:39:13,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:39:13,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619271304] [2024-06-21 17:39:13,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619271304] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:39:13,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:39:13,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:39:13,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766212280] [2024-06-21 17:39:13,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:39:13,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:39:13,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:39:13,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:39:13,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:39:13,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:39:13,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 162 transitions, 1435 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) [2024-06-21 17:39:13,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:39:13,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:39:13,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:39:14,003 INFO L124 PetriNetUnfolderBase]: 2075/3263 cut-off events. [2024-06-21 17:39:14,003 INFO L125 PetriNetUnfolderBase]: For 100496/100496 co-relation queries the response was YES. [2024-06-21 17:39:14,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19692 conditions, 3263 events. 2075/3263 cut-off events. For 100496/100496 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 17494 event pairs, 669 based on Foata normal form. 1/3263 useless extension candidates. Maximal degree in co-relation 19632. Up to 3141 conditions per place. [2024-06-21 17:39:14,026 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 160 selfloop transitions, 14 changer transitions 0/179 dead transitions. [2024-06-21 17:39:14,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 179 transitions, 1918 flow [2024-06-21 17:39:14,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:39:14,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:39:14,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-21 17:39:14,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3687707641196013 [2024-06-21 17:39:14,027 INFO L175 Difference]: Start difference. First operand has 130 places, 162 transitions, 1435 flow. Second operand 7 states and 111 transitions. [2024-06-21 17:39:14,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 179 transitions, 1918 flow [2024-06-21 17:39:14,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 179 transitions, 1846 flow, removed 35 selfloop flow, removed 1 redundant places. [2024-06-21 17:39:14,126 INFO L231 Difference]: Finished difference. Result has 137 places, 165 transitions, 1440 flow [2024-06-21 17:39:14,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1365, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1440, PETRI_PLACES=137, PETRI_TRANSITIONS=165} [2024-06-21 17:39:14,126 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 93 predicate places. [2024-06-21 17:39:14,127 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 165 transitions, 1440 flow [2024-06-21 17:39:14,127 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) [2024-06-21 17:39:14,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:39:14,127 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:39:14,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 17:39:14,127 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)] === [2024-06-21 17:39:14,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:39:14,127 INFO L85 PathProgramCache]: Analyzing trace with hash -206147107, now seen corresponding path program 1 times [2024-06-21 17:39:14,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:39:14,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931161903] [2024-06-21 17:39:14,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:39:14,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:39:14,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:39:16,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:39:16,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:39:16,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931161903] [2024-06-21 17:39:16,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931161903] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:39:16,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:39:16,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:39:16,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643272840] [2024-06-21 17:39:16,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:39:16,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:39:16,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:39:16,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:39:16,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:39:16,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:39:16,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 165 transitions, 1440 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) [2024-06-21 17:39:16,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:39:16,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:39:16,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:39:18,225 INFO L124 PetriNetUnfolderBase]: 2211/3497 cut-off events. [2024-06-21 17:39:18,225 INFO L125 PetriNetUnfolderBase]: For 121874/121874 co-relation queries the response was YES. [2024-06-21 17:39:18,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20721 conditions, 3497 events. 2211/3497 cut-off events. For 121874/121874 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 19104 event pairs, 474 based on Foata normal form. 32/3528 useless extension candidates. Maximal degree in co-relation 20657. Up to 2462 conditions per place. [2024-06-21 17:39:18,249 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 176 selfloop transitions, 39 changer transitions 0/220 dead transitions. [2024-06-21 17:39:18,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 220 transitions, 2213 flow [2024-06-21 17:39:18,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:39:18,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:39:18,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-21 17:39:18,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470284237726098 [2024-06-21 17:39:18,250 INFO L175 Difference]: Start difference. First operand has 137 places, 165 transitions, 1440 flow. Second operand 9 states and 173 transitions. [2024-06-21 17:39:18,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 220 transitions, 2213 flow [2024-06-21 17:39:18,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 220 transitions, 2175 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-21 17:39:18,332 INFO L231 Difference]: Finished difference. Result has 141 places, 167 transitions, 1538 flow [2024-06-21 17:39:18,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1402, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1538, PETRI_PLACES=141, PETRI_TRANSITIONS=167} [2024-06-21 17:39:18,333 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 97 predicate places. [2024-06-21 17:39:18,333 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 167 transitions, 1538 flow [2024-06-21 17:39:18,333 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) [2024-06-21 17:39:18,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:39:18,333 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:39:18,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 17:39:18,333 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)] === [2024-06-21 17:39:18,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:39:18,334 INFO L85 PathProgramCache]: Analyzing trace with hash -428873077, now seen corresponding path program 2 times [2024-06-21 17:39:18,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:39:18,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681892956] [2024-06-21 17:39:18,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:39:18,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:39:18,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:39:20,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:39:20,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:39:20,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681892956] [2024-06-21 17:39:20,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681892956] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:39:20,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:39:20,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:39:20,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189557074] [2024-06-21 17:39:20,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:39:20,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:39:20,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:39:20,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:39:20,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:39:20,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:39:20,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 167 transitions, 1538 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) [2024-06-21 17:39:20,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:39:20,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:39:20,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:39:22,385 INFO L124 PetriNetUnfolderBase]: 2139/3380 cut-off events. [2024-06-21 17:39:22,385 INFO L125 PetriNetUnfolderBase]: For 114494/114494 co-relation queries the response was YES. [2024-06-21 17:39:22,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19519 conditions, 3380 events. 2139/3380 cut-off events. For 114494/114494 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 18277 event pairs, 604 based on Foata normal form. 40/3419 useless extension candidates. Maximal degree in co-relation 19454. Up to 2858 conditions per place. [2024-06-21 17:39:22,411 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 181 selfloop transitions, 29 changer transitions 0/215 dead transitions. [2024-06-21 17:39:22,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 215 transitions, 2129 flow [2024-06-21 17:39:22,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:39:22,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:39:22,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-21 17:39:22,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289405684754522 [2024-06-21 17:39:22,413 INFO L175 Difference]: Start difference. First operand has 141 places, 167 transitions, 1538 flow. Second operand 9 states and 166 transitions. [2024-06-21 17:39:22,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 215 transitions, 2129 flow [2024-06-21 17:39:22,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 215 transitions, 2019 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-21 17:39:22,539 INFO L231 Difference]: Finished difference. Result has 144 places, 167 transitions, 1496 flow [2024-06-21 17:39:22,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1428, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1496, PETRI_PLACES=144, PETRI_TRANSITIONS=167} [2024-06-21 17:39:22,539 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 100 predicate places. [2024-06-21 17:39:22,539 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 167 transitions, 1496 flow [2024-06-21 17:39:22,539 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) [2024-06-21 17:39:22,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:39:22,539 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:39:22,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 17:39:22,540 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:39:22,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:39:22,540 INFO L85 PathProgramCache]: Analyzing trace with hash -96219155, now seen corresponding path program 3 times [2024-06-21 17:39:22,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:39:22,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232065355] [2024-06-21 17:39:22,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:39:22,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:39:22,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:39:24,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:39:24,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:39:24,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232065355] [2024-06-21 17:39:24,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232065355] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:39:24,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:39:24,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:39:24,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801354090] [2024-06-21 17:39:24,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:39:24,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:39:24,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:39:24,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:39:24,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:39:24,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:39:24,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 167 transitions, 1496 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) [2024-06-21 17:39:24,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:39:24,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:39:24,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:39:26,493 INFO L124 PetriNetUnfolderBase]: 2227/3551 cut-off events. [2024-06-21 17:39:26,494 INFO L125 PetriNetUnfolderBase]: For 111173/111177 co-relation queries the response was YES. [2024-06-21 17:39:26,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19945 conditions, 3551 events. 2227/3551 cut-off events. For 111173/111177 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 19564 event pairs, 503 based on Foata normal form. 24/3573 useless extension candidates. Maximal degree in co-relation 19879. Up to 2821 conditions per place. [2024-06-21 17:39:26,516 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 140 selfloop transitions, 66 changer transitions 0/211 dead transitions. [2024-06-21 17:39:26,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 211 transitions, 2087 flow [2024-06-21 17:39:26,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:39:26,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:39:26,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-21 17:39:26,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45058139534883723 [2024-06-21 17:39:26,517 INFO L175 Difference]: Start difference. First operand has 144 places, 167 transitions, 1496 flow. Second operand 8 states and 155 transitions. [2024-06-21 17:39:26,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 211 transitions, 2087 flow [2024-06-21 17:39:26,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 211 transitions, 1988 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-21 17:39:26,602 INFO L231 Difference]: Finished difference. Result has 143 places, 168 transitions, 1566 flow [2024-06-21 17:39:26,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1397, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1566, PETRI_PLACES=143, PETRI_TRANSITIONS=168} [2024-06-21 17:39:26,602 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 99 predicate places. [2024-06-21 17:39:26,603 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 168 transitions, 1566 flow [2024-06-21 17:39:26,603 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) [2024-06-21 17:39:26,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:39:26,603 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:39:26,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 17:39:26,603 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:39:26,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:39:26,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1149958253, now seen corresponding path program 4 times [2024-06-21 17:39:26,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:39:26,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310078516] [2024-06-21 17:39:26,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:39:26,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:39:26,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:39:29,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:39:29,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:39:29,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310078516] [2024-06-21 17:39:29,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310078516] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:39:29,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:39:29,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:39:29,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182889288] [2024-06-21 17:39:29,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:39:29,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:39:29,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:39:29,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:39:29,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:39:29,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:39:29,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 168 transitions, 1566 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) [2024-06-21 17:39:29,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:39:29,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:39:29,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:39:31,054 INFO L124 PetriNetUnfolderBase]: 2315/3693 cut-off events. [2024-06-21 17:39:31,055 INFO L125 PetriNetUnfolderBase]: For 119353/119353 co-relation queries the response was YES. [2024-06-21 17:39:31,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20824 conditions, 3693 events. 2315/3693 cut-off events. For 119353/119353 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 20642 event pairs, 545 based on Foata normal form. 20/3711 useless extension candidates. Maximal degree in co-relation 20757. Up to 2969 conditions per place. [2024-06-21 17:39:31,081 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 146 selfloop transitions, 65 changer transitions 0/216 dead transitions. [2024-06-21 17:39:31,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 216 transitions, 2185 flow [2024-06-21 17:39:31,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:39:31,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:39:31,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-21 17:39:31,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392764857881137 [2024-06-21 17:39:31,082 INFO L175 Difference]: Start difference. First operand has 143 places, 168 transitions, 1566 flow. Second operand 9 states and 170 transitions. [2024-06-21 17:39:31,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 216 transitions, 2185 flow [2024-06-21 17:39:31,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 216 transitions, 2034 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-21 17:39:31,161 INFO L231 Difference]: Finished difference. Result has 146 places, 169 transitions, 1584 flow [2024-06-21 17:39:31,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1415, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1584, PETRI_PLACES=146, PETRI_TRANSITIONS=169} [2024-06-21 17:39:31,161 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 102 predicate places. [2024-06-21 17:39:31,161 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 169 transitions, 1584 flow [2024-06-21 17:39:31,162 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) [2024-06-21 17:39:31,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:39:31,162 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:39:31,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 17:39:31,162 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:39:31,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:39:31,162 INFO L85 PathProgramCache]: Analyzing trace with hash -310116115, now seen corresponding path program 5 times [2024-06-21 17:39:31,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:39:31,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073761711] [2024-06-21 17:39:31,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:39:31,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:39:31,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:39:33,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:39:33,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:39:33,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073761711] [2024-06-21 17:39:33,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073761711] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:39:33,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:39:33,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:39:33,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077236022] [2024-06-21 17:39:33,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:39:33,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:39:33,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:39:33,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:39:33,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:39:33,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:39:33,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 169 transitions, 1584 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) [2024-06-21 17:39:33,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:39:33,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:39:33,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:39:35,730 INFO L124 PetriNetUnfolderBase]: 2383/3809 cut-off events. [2024-06-21 17:39:35,731 INFO L125 PetriNetUnfolderBase]: For 123935/123935 co-relation queries the response was YES. [2024-06-21 17:39:35,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21359 conditions, 3809 events. 2383/3809 cut-off events. For 123935/123935 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 21445 event pairs, 529 based on Foata normal form. 16/3823 useless extension candidates. Maximal degree in co-relation 21291. Up to 2951 conditions per place. [2024-06-21 17:39:35,754 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 153 selfloop transitions, 68 changer transitions 0/226 dead transitions. [2024-06-21 17:39:35,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 226 transitions, 2255 flow [2024-06-21 17:39:35,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:39:35,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:39:35,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-21 17:39:35,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43953488372093025 [2024-06-21 17:39:35,756 INFO L175 Difference]: Start difference. First operand has 146 places, 169 transitions, 1584 flow. Second operand 10 states and 189 transitions. [2024-06-21 17:39:35,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 226 transitions, 2255 flow [2024-06-21 17:39:35,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 226 transitions, 2104 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-21 17:39:35,867 INFO L231 Difference]: Finished difference. Result has 149 places, 170 transitions, 1609 flow [2024-06-21 17:39:35,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1433, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1609, PETRI_PLACES=149, PETRI_TRANSITIONS=170} [2024-06-21 17:39:35,868 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 105 predicate places. [2024-06-21 17:39:35,868 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 170 transitions, 1609 flow [2024-06-21 17:39:35,868 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) [2024-06-21 17:39:35,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:39:35,868 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:39:35,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 17:39:35,868 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:39:35,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:39:35,869 INFO L85 PathProgramCache]: Analyzing trace with hash -103041943, now seen corresponding path program 1 times [2024-06-21 17:39:35,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:39:35,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023748561] [2024-06-21 17:39:35,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:39:35,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:39:35,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:39:38,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:39:38,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:39:38,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023748561] [2024-06-21 17:39:38,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023748561] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:39:38,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:39:38,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:39:38,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871547061] [2024-06-21 17:39:38,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:39:38,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:39:38,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:39:38,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:39:38,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:39:38,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:39:38,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 170 transitions, 1609 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:39:38,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:39:38,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:39:38,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:39:40,256 INFO L124 PetriNetUnfolderBase]: 2555/4097 cut-off events. [2024-06-21 17:39:40,256 INFO L125 PetriNetUnfolderBase]: For 142295/142299 co-relation queries the response was YES. [2024-06-21 17:39:40,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23482 conditions, 4097 events. 2555/4097 cut-off events. For 142295/142299 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 23637 event pairs, 565 based on Foata normal form. 16/4111 useless extension candidates. Maximal degree in co-relation 23413. Up to 2627 conditions per place. [2024-06-21 17:39:40,293 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 144 selfloop transitions, 70 changer transitions 0/219 dead transitions. [2024-06-21 17:39:40,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 219 transitions, 2402 flow [2024-06-21 17:39:40,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:39:40,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:39:40,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-21 17:39:40,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45930232558139533 [2024-06-21 17:39:40,294 INFO L175 Difference]: Start difference. First operand has 149 places, 170 transitions, 1609 flow. Second operand 8 states and 158 transitions. [2024-06-21 17:39:40,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 219 transitions, 2402 flow [2024-06-21 17:39:40,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 219 transitions, 2238 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-21 17:39:40,396 INFO L231 Difference]: Finished difference. Result has 149 places, 172 transitions, 1661 flow [2024-06-21 17:39:40,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1445, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1661, PETRI_PLACES=149, PETRI_TRANSITIONS=172} [2024-06-21 17:39:40,397 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 105 predicate places. [2024-06-21 17:39:40,397 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 172 transitions, 1661 flow [2024-06-21 17:39:40,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:39:40,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:39:40,397 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:39:40,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 17:39:40,397 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:39:40,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:39:40,398 INFO L85 PathProgramCache]: Analyzing trace with hash -874250695, now seen corresponding path program 6 times [2024-06-21 17:39:40,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:39:40,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498060746] [2024-06-21 17:39:40,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:39:40,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:39:40,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:39:42,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:39:42,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:39:42,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498060746] [2024-06-21 17:39:42,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498060746] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:39:42,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:39:42,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:39:42,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314810694] [2024-06-21 17:39:42,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:39:42,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:39:42,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:39:42,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:39:42,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:39:42,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:39:42,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 172 transitions, 1661 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) [2024-06-21 17:39:42,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:39:42,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:39:42,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:39:44,649 INFO L124 PetriNetUnfolderBase]: 2643/4247 cut-off events. [2024-06-21 17:39:44,649 INFO L125 PetriNetUnfolderBase]: For 155924/155932 co-relation queries the response was YES. [2024-06-21 17:39:44,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24293 conditions, 4247 events. 2643/4247 cut-off events. For 155924/155932 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 24763 event pairs, 650 based on Foata normal form. 28/4267 useless extension candidates. Maximal degree in co-relation 24223. Up to 3521 conditions per place. [2024-06-21 17:39:44,678 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 143 selfloop transitions, 64 changer transitions 0/212 dead transitions. [2024-06-21 17:39:44,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 212 transitions, 2250 flow [2024-06-21 17:39:44,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:39:44,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:39:44,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-21 17:39:44,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-21 17:39:44,680 INFO L175 Difference]: Start difference. First operand has 149 places, 172 transitions, 1661 flow. Second operand 8 states and 149 transitions. [2024-06-21 17:39:44,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 212 transitions, 2250 flow [2024-06-21 17:39:44,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 212 transitions, 2145 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-21 17:39:44,820 INFO L231 Difference]: Finished difference. Result has 153 places, 173 transitions, 1729 flow [2024-06-21 17:39:44,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1556, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1729, PETRI_PLACES=153, PETRI_TRANSITIONS=173} [2024-06-21 17:39:44,820 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 109 predicate places. [2024-06-21 17:39:44,820 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 173 transitions, 1729 flow [2024-06-21 17:39:44,820 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) [2024-06-21 17:39:44,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:39:44,821 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:39:44,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 17:39:44,821 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)] === [2024-06-21 17:39:44,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:39:44,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1490881031, now seen corresponding path program 7 times [2024-06-21 17:39:44,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:39:44,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362393767] [2024-06-21 17:39:44,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:39:44,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:39:44,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:39:47,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:39:47,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:39:47,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362393767] [2024-06-21 17:39:47,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362393767] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:39:47,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:39:47,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:39:47,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093066016] [2024-06-21 17:39:47,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:39:47,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:39:47,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:39:47,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:39:47,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:39:47,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:39:47,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 173 transitions, 1729 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) [2024-06-21 17:39:47,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:39:47,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:39:47,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:39:49,709 INFO L124 PetriNetUnfolderBase]: 2607/4186 cut-off events. [2024-06-21 17:39:49,709 INFO L125 PetriNetUnfolderBase]: For 149072/149072 co-relation queries the response was YES. [2024-06-21 17:39:49,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23600 conditions, 4186 events. 2607/4186 cut-off events. For 149072/149072 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 24335 event pairs, 692 based on Foata normal form. 20/4193 useless extension candidates. Maximal degree in co-relation 23528. Up to 3465 conditions per place. [2024-06-21 17:39:49,737 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 143 selfloop transitions, 68 changer transitions 0/216 dead transitions. [2024-06-21 17:39:49,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 216 transitions, 2306 flow [2024-06-21 17:39:49,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:39:49,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:39:49,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-21 17:39:49,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42377260981912146 [2024-06-21 17:39:49,738 INFO L175 Difference]: Start difference. First operand has 153 places, 173 transitions, 1729 flow. Second operand 9 states and 164 transitions. [2024-06-21 17:39:49,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 216 transitions, 2306 flow [2024-06-21 17:39:49,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 216 transitions, 2135 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-21 17:39:49,896 INFO L231 Difference]: Finished difference. Result has 156 places, 173 transitions, 1701 flow [2024-06-21 17:39:49,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1558, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1701, PETRI_PLACES=156, PETRI_TRANSITIONS=173} [2024-06-21 17:39:49,897 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 112 predicate places. [2024-06-21 17:39:49,897 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 173 transitions, 1701 flow [2024-06-21 17:39:49,897 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) [2024-06-21 17:39:49,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:39:49,897 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:39:49,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 17:39:49,897 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:39:49,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:39:49,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1921087965, now seen corresponding path program 8 times [2024-06-21 17:39:49,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:39:49,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338879771] [2024-06-21 17:39:49,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:39:49,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:39:49,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:39:52,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:39:52,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:39:52,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338879771] [2024-06-21 17:39:52,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338879771] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:39:52,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:39:52,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:39:52,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925099731] [2024-06-21 17:39:52,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:39:52,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:39:52,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:39:52,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:39:52,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:39:52,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:39:52,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 173 transitions, 1701 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) [2024-06-21 17:39:52,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:39:52,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:39:52,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:39:54,683 INFO L124 PetriNetUnfolderBase]: 2619/4203 cut-off events. [2024-06-21 17:39:54,683 INFO L125 PetriNetUnfolderBase]: For 144482/144482 co-relation queries the response was YES. [2024-06-21 17:39:54,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23196 conditions, 4203 events. 2619/4203 cut-off events. For 144482/144482 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 24465 event pairs, 672 based on Foata normal form. 16/4205 useless extension candidates. Maximal degree in co-relation 23123. Up to 3359 conditions per place. [2024-06-21 17:39:54,715 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 150 selfloop transitions, 71 changer transitions 0/226 dead transitions. [2024-06-21 17:39:54,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 226 transitions, 2366 flow [2024-06-21 17:39:54,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:39:54,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:39:54,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 183 transitions. [2024-06-21 17:39:54,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255813953488372 [2024-06-21 17:39:54,717 INFO L175 Difference]: Start difference. First operand has 156 places, 173 transitions, 1701 flow. Second operand 10 states and 183 transitions. [2024-06-21 17:39:54,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 226 transitions, 2366 flow [2024-06-21 17:39:54,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 226 transitions, 2205 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-21 17:39:54,841 INFO L231 Difference]: Finished difference. Result has 158 places, 174 transitions, 1728 flow [2024-06-21 17:39:54,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1540, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1728, PETRI_PLACES=158, PETRI_TRANSITIONS=174} [2024-06-21 17:39:54,842 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 114 predicate places. [2024-06-21 17:39:54,842 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 174 transitions, 1728 flow [2024-06-21 17:39:54,842 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) [2024-06-21 17:39:54,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:39:54,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:39:54,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 17:39:54,842 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:39:54,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:39:54,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1487712601, now seen corresponding path program 2 times [2024-06-21 17:39:54,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:39:54,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742073010] [2024-06-21 17:39:54,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:39:54,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:39:54,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:39:57,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:39:57,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:39:57,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742073010] [2024-06-21 17:39:57,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742073010] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:39:57,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:39:57,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:39:57,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144149703] [2024-06-21 17:39:57,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:39:57,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:39:57,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:39:57,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:39:57,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:39:57,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:39:57,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 174 transitions, 1728 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:39:57,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:39:57,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:39:57,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:39:59,295 INFO L124 PetriNetUnfolderBase]: 2667/4309 cut-off events. [2024-06-21 17:39:59,295 INFO L125 PetriNetUnfolderBase]: For 150514/150522 co-relation queries the response was YES. [2024-06-21 17:39:59,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23733 conditions, 4309 events. 2667/4309 cut-off events. For 150514/150522 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 25485 event pairs, 636 based on Foata normal form. 20/4321 useless extension candidates. Maximal degree in co-relation 23659. Up to 3467 conditions per place. [2024-06-21 17:39:59,328 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 147 selfloop transitions, 65 changer transitions 0/217 dead transitions. [2024-06-21 17:39:59,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 217 transitions, 2349 flow [2024-06-21 17:39:59,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:39:59,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:39:59,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-21 17:39:59,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-21 17:39:59,330 INFO L175 Difference]: Start difference. First operand has 158 places, 174 transitions, 1728 flow. Second operand 8 states and 151 transitions. [2024-06-21 17:39:59,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 217 transitions, 2349 flow [2024-06-21 17:39:59,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 217 transitions, 2173 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-21 17:39:59,487 INFO L231 Difference]: Finished difference. Result has 158 places, 175 transitions, 1730 flow [2024-06-21 17:39:59,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1552, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1730, PETRI_PLACES=158, PETRI_TRANSITIONS=175} [2024-06-21 17:39:59,488 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 114 predicate places. [2024-06-21 17:39:59,488 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 175 transitions, 1730 flow [2024-06-21 17:39:59,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:39:59,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:39:59,488 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:39:59,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 17:39:59,488 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)] === [2024-06-21 17:39:59,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:39:59,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1931422037, now seen corresponding path program 3 times [2024-06-21 17:39:59,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:39:59,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643136228] [2024-06-21 17:39:59,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:39:59,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:39:59,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:40:02,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:40:02,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:40:02,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643136228] [2024-06-21 17:40:02,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643136228] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:40:02,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:40:02,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:40:02,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635103759] [2024-06-21 17:40:02,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:40:02,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:40:02,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:40:02,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:40:02,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:40:02,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:40:02,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 175 transitions, 1730 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:40:02,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:40:02,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:40:02,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:40:03,905 INFO L124 PetriNetUnfolderBase]: 2647/4289 cut-off events. [2024-06-21 17:40:03,905 INFO L125 PetriNetUnfolderBase]: For 145612/145620 co-relation queries the response was YES. [2024-06-21 17:40:03,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22964 conditions, 4289 events. 2647/4289 cut-off events. For 145612/145620 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 25342 event pairs, 587 based on Foata normal form. 20/4301 useless extension candidates. Maximal degree in co-relation 22889. Up to 2455 conditions per place. [2024-06-21 17:40:03,932 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 135 selfloop transitions, 75 changer transitions 0/215 dead transitions. [2024-06-21 17:40:03,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 215 transitions, 2229 flow [2024-06-21 17:40:03,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:40:03,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:40:03,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-21 17:40:03,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-21 17:40:03,933 INFO L175 Difference]: Start difference. First operand has 158 places, 175 transitions, 1730 flow. Second operand 8 states and 149 transitions. [2024-06-21 17:40:03,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 215 transitions, 2229 flow [2024-06-21 17:40:04,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 215 transitions, 2067 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-21 17:40:04,033 INFO L231 Difference]: Finished difference. Result has 159 places, 174 transitions, 1650 flow [2024-06-21 17:40:04,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1496, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1650, PETRI_PLACES=159, PETRI_TRANSITIONS=174} [2024-06-21 17:40:04,034 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 115 predicate places. [2024-06-21 17:40:04,034 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 174 transitions, 1650 flow [2024-06-21 17:40:04,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:40:04,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:40:04,034 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:40:04,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 17:40:04,034 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:40:04,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:40:04,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1259993723, now seen corresponding path program 1 times [2024-06-21 17:40:04,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:40:04,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302068295] [2024-06-21 17:40:04,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:40:04,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:40:04,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:40:06,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:40:06,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:40:06,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302068295] [2024-06-21 17:40:06,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302068295] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:40:06,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:40:06,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:40:06,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077967184] [2024-06-21 17:40:06,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:40:06,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:40:06,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:40:06,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:40:06,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:40:06,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:40:06,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 174 transitions, 1650 flow. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:40:06,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:40:06,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:40:06,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:40:07,480 INFO L124 PetriNetUnfolderBase]: 2657/4304 cut-off events. [2024-06-21 17:40:07,480 INFO L125 PetriNetUnfolderBase]: For 143391/143393 co-relation queries the response was YES. [2024-06-21 17:40:07,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23152 conditions, 4304 events. 2657/4304 cut-off events. For 143391/143393 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 25509 event pairs, 811 based on Foata normal form. 4/4307 useless extension candidates. Maximal degree in co-relation 23076. Up to 4094 conditions per place. [2024-06-21 17:40:07,511 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 165 selfloop transitions, 25 changer transitions 0/195 dead transitions. [2024-06-21 17:40:07,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 195 transitions, 2209 flow [2024-06-21 17:40:07,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:40:07,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:40:07,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-21 17:40:07,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4108527131782946 [2024-06-21 17:40:07,515 INFO L175 Difference]: Start difference. First operand has 159 places, 174 transitions, 1650 flow. Second operand 6 states and 106 transitions. [2024-06-21 17:40:07,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 195 transitions, 2209 flow [2024-06-21 17:40:07,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 195 transitions, 1958 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-21 17:40:07,620 INFO L231 Difference]: Finished difference. Result has 157 places, 177 transitions, 1492 flow [2024-06-21 17:40:07,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1399, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1492, PETRI_PLACES=157, PETRI_TRANSITIONS=177} [2024-06-21 17:40:07,621 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 113 predicate places. [2024-06-21 17:40:07,621 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 177 transitions, 1492 flow [2024-06-21 17:40:07,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:40:07,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:40:07,621 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:40:07,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 17:40:07,622 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:40:07,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:40:07,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1297967483, now seen corresponding path program 2 times [2024-06-21 17:40:07,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:40:07,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681221698] [2024-06-21 17:40:07,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:40:07,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:40:07,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:40:09,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:40:09,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:40:09,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681221698] [2024-06-21 17:40:09,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681221698] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:40:09,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:40:09,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:40:09,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872070452] [2024-06-21 17:40:09,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:40:09,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:40:09,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:40:09,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:40:09,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:40:09,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:40:09,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 177 transitions, 1492 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) [2024-06-21 17:40:09,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:40:09,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:40:09,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:40:11,546 INFO L124 PetriNetUnfolderBase]: 2651/4296 cut-off events. [2024-06-21 17:40:11,546 INFO L125 PetriNetUnfolderBase]: For 144060/144060 co-relation queries the response was YES. [2024-06-21 17:40:11,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22152 conditions, 4296 events. 2651/4296 cut-off events. For 144060/144060 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 25498 event pairs, 819 based on Foata normal form. 2/4296 useless extension candidates. Maximal degree in co-relation 22077. Up to 4089 conditions per place. [2024-06-21 17:40:11,578 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 164 selfloop transitions, 27 changer transitions 0/196 dead transitions. [2024-06-21 17:40:11,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 196 transitions, 2020 flow [2024-06-21 17:40:11,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:40:11,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:40:11,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-21 17:40:11,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3920265780730897 [2024-06-21 17:40:11,579 INFO L175 Difference]: Start difference. First operand has 157 places, 177 transitions, 1492 flow. Second operand 7 states and 118 transitions. [2024-06-21 17:40:11,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 196 transitions, 2020 flow [2024-06-21 17:40:11,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 196 transitions, 1940 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-21 17:40:11,710 INFO L231 Difference]: Finished difference. Result has 160 places, 177 transitions, 1472 flow [2024-06-21 17:40:11,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1412, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1472, PETRI_PLACES=160, PETRI_TRANSITIONS=177} [2024-06-21 17:40:11,711 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 116 predicate places. [2024-06-21 17:40:11,711 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 177 transitions, 1472 flow [2024-06-21 17:40:11,711 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) [2024-06-21 17:40:11,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:40:11,711 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:40:11,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 17:40:11,711 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:40:11,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:40:11,712 INFO L85 PathProgramCache]: Analyzing trace with hash -2072311431, now seen corresponding path program 1 times [2024-06-21 17:40:11,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:40:11,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111516156] [2024-06-21 17:40:11,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:40:11,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:40:11,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:40:14,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:40:14,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:40:14,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111516156] [2024-06-21 17:40:14,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111516156] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:40:14,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:40:14,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:40:14,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108576864] [2024-06-21 17:40:14,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:40:14,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:40:14,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:40:14,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:40:14,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:40:14,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:40:14,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 177 transitions, 1472 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) [2024-06-21 17:40:14,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:40:14,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:40:14,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:40:15,789 INFO L124 PetriNetUnfolderBase]: 2699/4371 cut-off events. [2024-06-21 17:40:15,789 INFO L125 PetriNetUnfolderBase]: For 155622/155622 co-relation queries the response was YES. [2024-06-21 17:40:15,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22776 conditions, 4371 events. 2699/4371 cut-off events. For 155622/155622 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 25939 event pairs, 835 based on Foata normal form. 4/4367 useless extension candidates. Maximal degree in co-relation 22701. Up to 3733 conditions per place. [2024-06-21 17:40:15,825 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 165 selfloop transitions, 57 changer transitions 0/227 dead transitions. [2024-06-21 17:40:15,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 227 transitions, 2492 flow [2024-06-21 17:40:15,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:40:15,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:40:15,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-21 17:40:15,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318936877076412 [2024-06-21 17:40:15,827 INFO L175 Difference]: Start difference. First operand has 160 places, 177 transitions, 1472 flow. Second operand 7 states and 130 transitions. [2024-06-21 17:40:15,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 227 transitions, 2492 flow [2024-06-21 17:40:15,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 227 transitions, 2390 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-21 17:40:15,945 INFO L231 Difference]: Finished difference. Result has 160 places, 196 transitions, 1746 flow [2024-06-21 17:40:15,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1370, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1746, PETRI_PLACES=160, PETRI_TRANSITIONS=196} [2024-06-21 17:40:15,945 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 116 predicate places. [2024-06-21 17:40:15,946 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 196 transitions, 1746 flow [2024-06-21 17:40:15,946 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) [2024-06-21 17:40:15,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:40:15,946 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:40:15,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 17:40:15,946 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:40:15,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:40:15,947 INFO L85 PathProgramCache]: Analyzing trace with hash 122573725, now seen corresponding path program 3 times [2024-06-21 17:40:15,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:40:15,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307212408] [2024-06-21 17:40:15,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:40:15,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:40:15,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:40:18,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:40:18,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:40:18,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307212408] [2024-06-21 17:40:18,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307212408] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:40:18,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:40:18,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:40:18,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010536163] [2024-06-21 17:40:18,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:40:18,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:40:18,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:40:18,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:40:18,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:40:18,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:40:18,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 196 transitions, 1746 flow. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:40:18,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:40:18,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:40:18,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:40:19,184 INFO L124 PetriNetUnfolderBase]: 2693/4366 cut-off events. [2024-06-21 17:40:19,184 INFO L125 PetriNetUnfolderBase]: For 159767/159767 co-relation queries the response was YES. [2024-06-21 17:40:19,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23677 conditions, 4366 events. 2693/4366 cut-off events. For 159767/159767 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 25900 event pairs, 848 based on Foata normal form. 2/4367 useless extension candidates. Maximal degree in co-relation 23602. Up to 4201 conditions per place. [2024-06-21 17:40:19,220 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 190 selfloop transitions, 14 changer transitions 0/209 dead transitions. [2024-06-21 17:40:19,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 209 transitions, 2194 flow [2024-06-21 17:40:19,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:40:19,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:40:19,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 109 transitions. [2024-06-21 17:40:19,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36212624584717606 [2024-06-21 17:40:19,222 INFO L175 Difference]: Start difference. First operand has 160 places, 196 transitions, 1746 flow. Second operand 7 states and 109 transitions. [2024-06-21 17:40:19,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 209 transitions, 2194 flow [2024-06-21 17:40:19,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 209 transitions, 2128 flow, removed 32 selfloop flow, removed 1 redundant places. [2024-06-21 17:40:19,380 INFO L231 Difference]: Finished difference. Result has 166 places, 196 transitions, 1714 flow [2024-06-21 17:40:19,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1680, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1714, PETRI_PLACES=166, PETRI_TRANSITIONS=196} [2024-06-21 17:40:19,380 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 122 predicate places. [2024-06-21 17:40:19,380 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 196 transitions, 1714 flow [2024-06-21 17:40:19,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:40:19,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:40:19,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:40:19,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 17:40:19,381 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:40:19,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:40:19,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1894942761, now seen corresponding path program 2 times [2024-06-21 17:40:19,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:40:19,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398646905] [2024-06-21 17:40:19,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:40:19,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:40:19,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:40:21,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:40:21,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:40:21,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398646905] [2024-06-21 17:40:21,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398646905] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:40:21,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:40:21,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:40:21,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217835017] [2024-06-21 17:40:21,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:40:21,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:40:21,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:40:21,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:40:21,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:40:21,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:40:21,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 196 transitions, 1714 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) [2024-06-21 17:40:21,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:40:21,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:40:21,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:40:23,446 INFO L124 PetriNetUnfolderBase]: 2971/4751 cut-off events. [2024-06-21 17:40:23,446 INFO L125 PetriNetUnfolderBase]: For 201423/201423 co-relation queries the response was YES. [2024-06-21 17:40:23,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26778 conditions, 4751 events. 2971/4751 cut-off events. For 201423/201423 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 28085 event pairs, 751 based on Foata normal form. 6/4749 useless extension candidates. Maximal degree in co-relation 26700. Up to 4171 conditions per place. [2024-06-21 17:40:23,478 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 184 selfloop transitions, 59 changer transitions 0/248 dead transitions. [2024-06-21 17:40:23,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 248 transitions, 2790 flow [2024-06-21 17:40:23,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:40:23,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:40:23,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-21 17:40:23,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40568475452196384 [2024-06-21 17:40:23,479 INFO L175 Difference]: Start difference. First operand has 166 places, 196 transitions, 1714 flow. Second operand 9 states and 157 transitions. [2024-06-21 17:40:23,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 248 transitions, 2790 flow [2024-06-21 17:40:23,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 248 transitions, 2762 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-21 17:40:23,646 INFO L231 Difference]: Finished difference. Result has 171 places, 219 transitions, 2105 flow [2024-06-21 17:40:23,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1686, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2105, PETRI_PLACES=171, PETRI_TRANSITIONS=219} [2024-06-21 17:40:23,647 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 127 predicate places. [2024-06-21 17:40:23,647 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 219 transitions, 2105 flow [2024-06-21 17:40:23,647 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) [2024-06-21 17:40:23,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:40:23,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:40:23,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 17:40:23,648 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:40:23,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:40:23,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1041062549, now seen corresponding path program 3 times [2024-06-21 17:40:23,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:40:23,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569334424] [2024-06-21 17:40:23,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:40:23,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:40:23,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:40:26,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:40:26,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:40:26,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569334424] [2024-06-21 17:40:26,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569334424] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:40:26,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:40:26,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:40:26,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599938428] [2024-06-21 17:40:26,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:40:26,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:40:26,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:40:26,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:40:26,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:40:26,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:40:26,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 219 transitions, 2105 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) [2024-06-21 17:40:26,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:40:26,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:40:26,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:40:27,541 INFO L124 PetriNetUnfolderBase]: 2961/4729 cut-off events. [2024-06-21 17:40:27,541 INFO L125 PetriNetUnfolderBase]: For 206461/206461 co-relation queries the response was YES. [2024-06-21 17:40:27,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27910 conditions, 4729 events. 2961/4729 cut-off events. For 206461/206461 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 27885 event pairs, 748 based on Foata normal form. 6/4727 useless extension candidates. Maximal degree in co-relation 27829. Up to 4170 conditions per place. [2024-06-21 17:40:27,580 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 183 selfloop transitions, 62 changer transitions 0/250 dead transitions. [2024-06-21 17:40:27,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 250 transitions, 3017 flow [2024-06-21 17:40:27,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:40:27,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:40:27,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-21 17:40:27,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-06-21 17:40:27,581 INFO L175 Difference]: Start difference. First operand has 171 places, 219 transitions, 2105 flow. Second operand 8 states and 140 transitions. [2024-06-21 17:40:27,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 250 transitions, 3017 flow [2024-06-21 17:40:27,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 250 transitions, 2850 flow, removed 63 selfloop flow, removed 4 redundant places. [2024-06-21 17:40:27,772 INFO L231 Difference]: Finished difference. Result has 176 places, 228 transitions, 2259 flow [2024-06-21 17:40:27,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1954, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2259, PETRI_PLACES=176, PETRI_TRANSITIONS=228} [2024-06-21 17:40:27,773 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 132 predicate places. [2024-06-21 17:40:27,773 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 228 transitions, 2259 flow [2024-06-21 17:40:27,773 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) [2024-06-21 17:40:27,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:40:27,773 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:40:27,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 17:40:27,773 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:40:27,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:40:27,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1040816471, now seen corresponding path program 1 times [2024-06-21 17:40:27,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:40:27,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043756492] [2024-06-21 17:40:27,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:40:27,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:40:27,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:40:31,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:40:31,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:40:31,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043756492] [2024-06-21 17:40:31,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043756492] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:40:31,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:40:31,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:40:31,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875268023] [2024-06-21 17:40:31,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:40:31,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:40:31,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:40:31,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:40:31,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:40:31,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:40:31,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 228 transitions, 2259 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) [2024-06-21 17:40:31,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:40:31,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:40:31,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:40:32,804 INFO L124 PetriNetUnfolderBase]: 3000/4786 cut-off events. [2024-06-21 17:40:32,804 INFO L125 PetriNetUnfolderBase]: For 224000/224000 co-relation queries the response was YES. [2024-06-21 17:40:32,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28331 conditions, 4786 events. 3000/4786 cut-off events. For 224000/224000 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 28170 event pairs, 749 based on Foata normal form. 14/4792 useless extension candidates. Maximal degree in co-relation 28247. Up to 4464 conditions per place. [2024-06-21 17:40:32,845 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 215 selfloop transitions, 33 changer transitions 0/253 dead transitions. [2024-06-21 17:40:32,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 253 transitions, 2899 flow [2024-06-21 17:40:32,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:40:32,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:40:32,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-21 17:40:32,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4053156146179402 [2024-06-21 17:40:32,847 INFO L175 Difference]: Start difference. First operand has 176 places, 228 transitions, 2259 flow. Second operand 7 states and 122 transitions. [2024-06-21 17:40:32,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 253 transitions, 2899 flow [2024-06-21 17:40:33,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 253 transitions, 2798 flow, removed 34 selfloop flow, removed 3 redundant places. [2024-06-21 17:40:33,093 INFO L231 Difference]: Finished difference. Result has 180 places, 230 transitions, 2263 flow [2024-06-21 17:40:33,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2158, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2263, PETRI_PLACES=180, PETRI_TRANSITIONS=230} [2024-06-21 17:40:33,094 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 136 predicate places. [2024-06-21 17:40:33,094 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 230 transitions, 2263 flow [2024-06-21 17:40:33,094 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) [2024-06-21 17:40:33,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:40:33,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:40:33,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 17:40:33,094 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:40:33,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:40:33,094 INFO L85 PathProgramCache]: Analyzing trace with hash 538570350, now seen corresponding path program 1 times [2024-06-21 17:40:33,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:40:33,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771807307] [2024-06-21 17:40:33,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:40:33,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:40:33,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:40:35,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:40:35,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:40:35,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771807307] [2024-06-21 17:40:35,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771807307] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:40:35,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:40:35,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:40:35,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183250657] [2024-06-21 17:40:35,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:40:35,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:40:35,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:40:35,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:40:35,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:40:35,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:40:35,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 230 transitions, 2263 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) [2024-06-21 17:40:35,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:40:35,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:40:35,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:40:36,945 INFO L124 PetriNetUnfolderBase]: 3061/4910 cut-off events. [2024-06-21 17:40:36,945 INFO L125 PetriNetUnfolderBase]: For 224369/224369 co-relation queries the response was YES. [2024-06-21 17:40:36,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29522 conditions, 4910 events. 3061/4910 cut-off events. For 224369/224369 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 29308 event pairs, 841 based on Foata normal form. 1/4909 useless extension candidates. Maximal degree in co-relation 29436. Up to 4093 conditions per place. [2024-06-21 17:40:36,998 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 192 selfloop transitions, 81 changer transitions 0/278 dead transitions. [2024-06-21 17:40:36,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 278 transitions, 3435 flow [2024-06-21 17:40:36,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:40:36,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:40:36,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-21 17:40:36,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46179401993355484 [2024-06-21 17:40:36,999 INFO L175 Difference]: Start difference. First operand has 180 places, 230 transitions, 2263 flow. Second operand 7 states and 139 transitions. [2024-06-21 17:40:37,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 278 transitions, 3435 flow [2024-06-21 17:40:37,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 278 transitions, 3350 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-21 17:40:37,275 INFO L231 Difference]: Finished difference. Result has 185 places, 246 transitions, 2702 flow [2024-06-21 17:40:37,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2182, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2702, PETRI_PLACES=185, PETRI_TRANSITIONS=246} [2024-06-21 17:40:37,276 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 141 predicate places. [2024-06-21 17:40:37,276 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 246 transitions, 2702 flow [2024-06-21 17:40:37,276 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) [2024-06-21 17:40:37,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:40:37,276 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:40:37,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 17:40:37,277 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:40:37,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:40:37,277 INFO L85 PathProgramCache]: Analyzing trace with hash -1935113322, now seen corresponding path program 2 times [2024-06-21 17:40:37,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:40:37,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817311556] [2024-06-21 17:40:37,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:40:37,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:40:37,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:40:39,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:40:39,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:40:39,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817311556] [2024-06-21 17:40:39,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817311556] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:40:39,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:40:39,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:40:39,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456631788] [2024-06-21 17:40:39,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:40:39,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:40:39,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:40:39,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:40:39,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:40:39,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:40:39,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 246 transitions, 2702 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) [2024-06-21 17:40:39,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:40:39,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:40:39,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:40:41,362 INFO L124 PetriNetUnfolderBase]: 3103/4959 cut-off events. [2024-06-21 17:40:41,362 INFO L125 PetriNetUnfolderBase]: For 241531/241531 co-relation queries the response was YES. [2024-06-21 17:40:41,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31230 conditions, 4959 events. 3103/4959 cut-off events. For 241531/241531 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 29500 event pairs, 809 based on Foata normal form. 2/4960 useless extension candidates. Maximal degree in co-relation 31140. Up to 4640 conditions per place. [2024-06-21 17:40:41,404 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 236 selfloop transitions, 45 changer transitions 0/286 dead transitions. [2024-06-21 17:40:41,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 286 transitions, 3714 flow [2024-06-21 17:40:41,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:40:41,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:40:41,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-21 17:40:41,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4127906976744186 [2024-06-21 17:40:41,405 INFO L175 Difference]: Start difference. First operand has 185 places, 246 transitions, 2702 flow. Second operand 8 states and 142 transitions. [2024-06-21 17:40:41,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 286 transitions, 3714 flow [2024-06-21 17:40:41,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 286 transitions, 3658 flow, removed 27 selfloop flow, removed 1 redundant places. [2024-06-21 17:40:41,691 INFO L231 Difference]: Finished difference. Result has 193 places, 258 transitions, 2994 flow [2024-06-21 17:40:41,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2656, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2994, PETRI_PLACES=193, PETRI_TRANSITIONS=258} [2024-06-21 17:40:41,691 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 149 predicate places. [2024-06-21 17:40:41,692 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 258 transitions, 2994 flow [2024-06-21 17:40:41,692 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) [2024-06-21 17:40:41,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:40:41,692 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:40:41,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 17:40:41,692 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:40:41,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:40:41,692 INFO L85 PathProgramCache]: Analyzing trace with hash 690580286, now seen corresponding path program 3 times [2024-06-21 17:40:41,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:40:41,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575446797] [2024-06-21 17:40:41,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:40:41,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:40:41,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:40:43,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:40:43,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:40:43,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575446797] [2024-06-21 17:40:43,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575446797] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:40:43,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:40:43,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:40:43,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972267975] [2024-06-21 17:40:43,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:40:43,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:40:43,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:40:43,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:40:43,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:40:43,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:40:43,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 258 transitions, 2994 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) [2024-06-21 17:40:43,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:40:43,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:40:43,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:40:45,718 INFO L124 PetriNetUnfolderBase]: 3108/4972 cut-off events. [2024-06-21 17:40:45,718 INFO L125 PetriNetUnfolderBase]: For 249871/249871 co-relation queries the response was YES. [2024-06-21 17:40:45,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31700 conditions, 4972 events. 3108/4972 cut-off events. For 249871/249871 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 29585 event pairs, 929 based on Foata normal form. 1/4965 useless extension candidates. Maximal degree in co-relation 31606. Up to 4135 conditions per place. [2024-06-21 17:40:45,761 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 198 selfloop transitions, 86 changer transitions 0/289 dead transitions. [2024-06-21 17:40:45,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 289 transitions, 4014 flow [2024-06-21 17:40:45,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:40:45,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:40:45,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-21 17:40:45,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43853820598006643 [2024-06-21 17:40:45,762 INFO L175 Difference]: Start difference. First operand has 193 places, 258 transitions, 2994 flow. Second operand 7 states and 132 transitions. [2024-06-21 17:40:45,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 289 transitions, 4014 flow [2024-06-21 17:40:46,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 289 transitions, 3872 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-21 17:40:46,011 INFO L231 Difference]: Finished difference. Result has 195 places, 261 transitions, 3089 flow [2024-06-21 17:40:46,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2852, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3089, PETRI_PLACES=195, PETRI_TRANSITIONS=261} [2024-06-21 17:40:46,012 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 151 predicate places. [2024-06-21 17:40:46,012 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 261 transitions, 3089 flow [2024-06-21 17:40:46,012 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) [2024-06-21 17:40:46,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:40:46,012 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:40:46,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 17:40:46,013 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:40:46,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:40:46,013 INFO L85 PathProgramCache]: Analyzing trace with hash 182842262, now seen corresponding path program 4 times [2024-06-21 17:40:46,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:40:46,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038186247] [2024-06-21 17:40:46,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:40:46,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:40:46,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:40:48,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:40:48,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:40:48,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038186247] [2024-06-21 17:40:48,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038186247] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:40:48,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:40:48,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:40:48,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987429571] [2024-06-21 17:40:48,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:40:48,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:40:48,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:40:48,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:40:48,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:40:48,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:40:48,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 261 transitions, 3089 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) [2024-06-21 17:40:48,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:40:48,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:40:48,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:40:50,686 INFO L124 PetriNetUnfolderBase]: 3095/4942 cut-off events. [2024-06-21 17:40:50,686 INFO L125 PetriNetUnfolderBase]: For 259994/259994 co-relation queries the response was YES. [2024-06-21 17:40:50,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31856 conditions, 4942 events. 3095/4942 cut-off events. For 259994/259994 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 29367 event pairs, 916 based on Foata normal form. 3/4937 useless extension candidates. Maximal degree in co-relation 31761. Up to 4128 conditions per place. [2024-06-21 17:40:50,742 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 197 selfloop transitions, 83 changer transitions 0/285 dead transitions. [2024-06-21 17:40:50,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 285 transitions, 3931 flow [2024-06-21 17:40:50,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:40:50,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:40:50,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-21 17:40:50,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 17:40:50,743 INFO L175 Difference]: Start difference. First operand has 195 places, 261 transitions, 3089 flow. Second operand 7 states and 129 transitions. [2024-06-21 17:40:50,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 285 transitions, 3931 flow [2024-06-21 17:40:51,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 285 transitions, 3734 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-21 17:40:51,117 INFO L231 Difference]: Finished difference. Result has 198 places, 261 transitions, 3066 flow [2024-06-21 17:40:51,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2892, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3066, PETRI_PLACES=198, PETRI_TRANSITIONS=261} [2024-06-21 17:40:51,117 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 154 predicate places. [2024-06-21 17:40:51,117 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 261 transitions, 3066 flow [2024-06-21 17:40:51,118 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) [2024-06-21 17:40:51,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:40:51,118 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:40:51,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 17:40:51,118 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:40:51,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:40:51,118 INFO L85 PathProgramCache]: Analyzing trace with hash -495188872, now seen corresponding path program 5 times [2024-06-21 17:40:51,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:40:51,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873355465] [2024-06-21 17:40:51,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:40:51,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:40:51,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:40:53,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:40:53,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:40:53,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873355465] [2024-06-21 17:40:53,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873355465] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:40:53,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:40:53,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:40:53,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827050487] [2024-06-21 17:40:53,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:40:53,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:40:53,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:40:53,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:40:53,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:40:53,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:40:53,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 261 transitions, 3066 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) [2024-06-21 17:40:53,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:40:53,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:40:53,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:40:55,197 INFO L124 PetriNetUnfolderBase]: 3086/4921 cut-off events. [2024-06-21 17:40:55,197 INFO L125 PetriNetUnfolderBase]: For 262870/262870 co-relation queries the response was YES. [2024-06-21 17:40:55,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31611 conditions, 4921 events. 3086/4921 cut-off events. For 262870/262870 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 29121 event pairs, 767 based on Foata normal form. 3/4916 useless extension candidates. Maximal degree in co-relation 31516. Up to 4301 conditions per place. [2024-06-21 17:40:55,243 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 205 selfloop transitions, 74 changer transitions 0/284 dead transitions. [2024-06-21 17:40:55,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 284 transitions, 3938 flow [2024-06-21 17:40:55,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:40:55,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:40:55,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-21 17:40:55,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40406976744186046 [2024-06-21 17:40:55,244 INFO L175 Difference]: Start difference. First operand has 198 places, 261 transitions, 3066 flow. Second operand 8 states and 139 transitions. [2024-06-21 17:40:55,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 284 transitions, 3938 flow [2024-06-21 17:40:55,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 284 transitions, 3757 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-21 17:40:55,661 INFO L231 Difference]: Finished difference. Result has 201 places, 261 transitions, 3046 flow [2024-06-21 17:40:55,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2889, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3046, PETRI_PLACES=201, PETRI_TRANSITIONS=261} [2024-06-21 17:40:55,661 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 157 predicate places. [2024-06-21 17:40:55,661 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 261 transitions, 3046 flow [2024-06-21 17:40:55,661 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) [2024-06-21 17:40:55,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:40:55,662 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:40:55,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 17:40:55,662 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:40:55,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:40:55,662 INFO L85 PathProgramCache]: Analyzing trace with hash 2080120292, now seen corresponding path program 6 times [2024-06-21 17:40:55,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:40:55,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654416664] [2024-06-21 17:40:55,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:40:55,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:40:55,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:40:58,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:40:58,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:40:58,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654416664] [2024-06-21 17:40:58,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654416664] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:40:58,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:40:58,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:40:58,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894665753] [2024-06-21 17:40:58,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:40:58,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:40:58,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:40:58,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:40:58,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:40:58,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:40:58,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 261 transitions, 3046 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) [2024-06-21 17:40:58,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:40:58,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:40:58,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:40:59,924 INFO L124 PetriNetUnfolderBase]: 3060/4881 cut-off events. [2024-06-21 17:40:59,925 INFO L125 PetriNetUnfolderBase]: For 266469/266469 co-relation queries the response was YES. [2024-06-21 17:40:59,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30988 conditions, 4881 events. 3060/4881 cut-off events. For 266469/266469 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 28853 event pairs, 763 based on Foata normal form. 6/4879 useless extension candidates. Maximal degree in co-relation 30892. Up to 4287 conditions per place. [2024-06-21 17:40:59,973 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 207 selfloop transitions, 76 changer transitions 0/288 dead transitions. [2024-06-21 17:40:59,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 288 transitions, 3950 flow [2024-06-21 17:40:59,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:40:59,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:40:59,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-21 17:40:59,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40568475452196384 [2024-06-21 17:40:59,975 INFO L175 Difference]: Start difference. First operand has 201 places, 261 transitions, 3046 flow. Second operand 9 states and 157 transitions. [2024-06-21 17:40:59,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 288 transitions, 3950 flow [2024-06-21 17:41:00,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 288 transitions, 3732 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-21 17:41:00,359 INFO L231 Difference]: Finished difference. Result has 203 places, 261 transitions, 2992 flow [2024-06-21 17:41:00,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2828, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2992, PETRI_PLACES=203, PETRI_TRANSITIONS=261} [2024-06-21 17:41:00,360 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 159 predicate places. [2024-06-21 17:41:00,360 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 261 transitions, 2992 flow [2024-06-21 17:41:00,360 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) [2024-06-21 17:41:00,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:41:00,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:41:00,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 17:41:00,361 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:41:00,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:41:00,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1887349675, now seen corresponding path program 1 times [2024-06-21 17:41:00,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:41:00,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687336938] [2024-06-21 17:41:00,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:41:00,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:41:00,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:41:02,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:41:02,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:41:02,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687336938] [2024-06-21 17:41:02,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687336938] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:41:02,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:41:02,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:41:02,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507253612] [2024-06-21 17:41:02,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:41:02,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:41:02,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:41:02,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:41:02,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:41:02,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:41:02,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 261 transitions, 2992 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:41:02,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:41:02,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:41:02,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:41:04,546 INFO L124 PetriNetUnfolderBase]: 3156/5034 cut-off events. [2024-06-21 17:41:04,546 INFO L125 PetriNetUnfolderBase]: For 291325/291333 co-relation queries the response was YES. [2024-06-21 17:41:04,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32239 conditions, 5034 events. 3156/5034 cut-off events. For 291325/291333 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 30044 event pairs, 860 based on Foata normal form. 16/5046 useless extension candidates. Maximal degree in co-relation 32142. Up to 4164 conditions per place. [2024-06-21 17:41:04,595 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 206 selfloop transitions, 86 changer transitions 0/297 dead transitions. [2024-06-21 17:41:04,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 297 transitions, 4034 flow [2024-06-21 17:41:04,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:41:04,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:41:04,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-21 17:41:04,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43521594684385384 [2024-06-21 17:41:04,597 INFO L175 Difference]: Start difference. First operand has 203 places, 261 transitions, 2992 flow. Second operand 7 states and 131 transitions. [2024-06-21 17:41:04,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 297 transitions, 4034 flow [2024-06-21 17:41:04,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 297 transitions, 3764 flow, removed 16 selfloop flow, removed 10 redundant places. [2024-06-21 17:41:04,913 INFO L231 Difference]: Finished difference. Result has 201 places, 271 transitions, 3079 flow [2024-06-21 17:41:04,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2722, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3079, PETRI_PLACES=201, PETRI_TRANSITIONS=271} [2024-06-21 17:41:04,914 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 157 predicate places. [2024-06-21 17:41:04,914 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 271 transitions, 3079 flow [2024-06-21 17:41:04,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:41:04,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:41:04,914 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:41:04,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 17:41:04,914 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:41:04,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:41:04,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1582288341, now seen corresponding path program 2 times [2024-06-21 17:41:04,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:41:04,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805188058] [2024-06-21 17:41:04,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:41:04,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:41:04,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:41:07,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:41:07,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:41:07,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805188058] [2024-06-21 17:41:07,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805188058] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:41:07,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:41:07,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:41:07,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062302555] [2024-06-21 17:41:07,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:41:07,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:41:07,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:41:07,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:41:07,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:41:07,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:41:07,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 271 transitions, 3079 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) [2024-06-21 17:41:07,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:41:07,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:41:07,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:41:10,065 INFO L124 PetriNetUnfolderBase]: 3204/5102 cut-off events. [2024-06-21 17:41:10,065 INFO L125 PetriNetUnfolderBase]: For 301276/301276 co-relation queries the response was YES. [2024-06-21 17:41:10,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32968 conditions, 5102 events. 3204/5102 cut-off events. For 301276/301276 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 30346 event pairs, 921 based on Foata normal form. 8/5102 useless extension candidates. Maximal degree in co-relation 32870. Up to 4196 conditions per place. [2024-06-21 17:41:10,111 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 204 selfloop transitions, 94 changer transitions 0/303 dead transitions. [2024-06-21 17:41:10,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 303 transitions, 4055 flow [2024-06-21 17:41:10,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:41:10,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:41:10,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-21 17:41:10,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42441860465116277 [2024-06-21 17:41:10,112 INFO L175 Difference]: Start difference. First operand has 201 places, 271 transitions, 3079 flow. Second operand 8 states and 146 transitions. [2024-06-21 17:41:10,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 303 transitions, 4055 flow [2024-06-21 17:41:10,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 303 transitions, 3918 flow, removed 36 selfloop flow, removed 2 redundant places. [2024-06-21 17:41:10,463 INFO L231 Difference]: Finished difference. Result has 207 places, 275 transitions, 3214 flow [2024-06-21 17:41:10,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2947, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3214, PETRI_PLACES=207, PETRI_TRANSITIONS=275} [2024-06-21 17:41:10,463 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 163 predicate places. [2024-06-21 17:41:10,463 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 275 transitions, 3214 flow [2024-06-21 17:41:10,463 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) [2024-06-21 17:41:10,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:41:10,463 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:41:10,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 17:41:10,463 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:41:10,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:41:10,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1883336883, now seen corresponding path program 3 times [2024-06-21 17:41:10,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:41:10,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138361437] [2024-06-21 17:41:10,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:41:10,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:41:10,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:41:13,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:41:13,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:41:13,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138361437] [2024-06-21 17:41:13,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138361437] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:41:13,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:41:13,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:41:13,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485219564] [2024-06-21 17:41:13,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:41:13,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:41:13,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:41:13,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:41:13,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:41:13,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:41:13,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 275 transitions, 3214 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) [2024-06-21 17:41:13,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:41:13,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:41:13,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:41:15,745 INFO L124 PetriNetUnfolderBase]: 3180/5068 cut-off events. [2024-06-21 17:41:15,745 INFO L125 PetriNetUnfolderBase]: For 300997/300997 co-relation queries the response was YES. [2024-06-21 17:41:15,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32345 conditions, 5068 events. 3180/5068 cut-off events. For 300997/300997 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 30202 event pairs, 907 based on Foata normal form. 8/5068 useless extension candidates. Maximal degree in co-relation 32245. Up to 4184 conditions per place. [2024-06-21 17:41:15,788 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 203 selfloop transitions, 100 changer transitions 0/308 dead transitions. [2024-06-21 17:41:15,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 308 transitions, 4140 flow [2024-06-21 17:41:15,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:41:15,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:41:15,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-21 17:41:15,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-06-21 17:41:15,790 INFO L175 Difference]: Start difference. First operand has 207 places, 275 transitions, 3214 flow. Second operand 10 states and 175 transitions. [2024-06-21 17:41:15,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 308 transitions, 4140 flow [2024-06-21 17:41:16,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 308 transitions, 3889 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-21 17:41:16,217 INFO L231 Difference]: Finished difference. Result has 211 places, 275 transitions, 3170 flow [2024-06-21 17:41:16,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2963, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3170, PETRI_PLACES=211, PETRI_TRANSITIONS=275} [2024-06-21 17:41:16,217 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 167 predicate places. [2024-06-21 17:41:16,217 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 275 transitions, 3170 flow [2024-06-21 17:41:16,217 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) [2024-06-21 17:41:16,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:41:16,217 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:41:16,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 17:41:16,218 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:41:16,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:41:16,218 INFO L85 PathProgramCache]: Analyzing trace with hash -487822559, now seen corresponding path program 4 times [2024-06-21 17:41:16,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:41:16,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081937591] [2024-06-21 17:41:16,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:41:16,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:41:16,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:41:18,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:41:18,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:41:18,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081937591] [2024-06-21 17:41:18,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081937591] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:41:18,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:41:18,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:41:18,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852697934] [2024-06-21 17:41:18,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:41:18,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:41:18,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:41:18,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:41:18,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:41:18,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:41:18,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 275 transitions, 3170 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:41:18,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:41:18,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:41:18,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:41:20,522 INFO L124 PetriNetUnfolderBase]: 3240/5147 cut-off events. [2024-06-21 17:41:20,522 INFO L125 PetriNetUnfolderBase]: For 316061/316061 co-relation queries the response was YES. [2024-06-21 17:41:20,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32787 conditions, 5147 events. 3240/5147 cut-off events. For 316061/316061 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 30532 event pairs, 776 based on Foata normal form. 12/5151 useless extension candidates. Maximal degree in co-relation 32687. Up to 4497 conditions per place. [2024-06-21 17:41:20,571 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 211 selfloop transitions, 91 changer transitions 0/307 dead transitions. [2024-06-21 17:41:20,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 307 transitions, 4177 flow [2024-06-21 17:41:20,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:41:20,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:41:20,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-21 17:41:20,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4082687338501292 [2024-06-21 17:41:20,572 INFO L175 Difference]: Start difference. First operand has 211 places, 275 transitions, 3170 flow. Second operand 9 states and 158 transitions. [2024-06-21 17:41:20,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 307 transitions, 4177 flow [2024-06-21 17:41:21,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 307 transitions, 3917 flow, removed 18 selfloop flow, removed 9 redundant places. [2024-06-21 17:41:21,040 INFO L231 Difference]: Finished difference. Result has 211 places, 282 transitions, 3208 flow [2024-06-21 17:41:21,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2916, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3208, PETRI_PLACES=211, PETRI_TRANSITIONS=282} [2024-06-21 17:41:21,041 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 167 predicate places. [2024-06-21 17:41:21,041 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 282 transitions, 3208 flow [2024-06-21 17:41:21,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:41:21,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:41:21,041 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:41:21,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 17:41:21,042 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:41:21,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:41:21,042 INFO L85 PathProgramCache]: Analyzing trace with hash 2086795615, now seen corresponding path program 5 times [2024-06-21 17:41:21,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:41:21,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147108085] [2024-06-21 17:41:21,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:41:21,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:41:21,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:41:23,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:41:23,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:41:23,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147108085] [2024-06-21 17:41:23,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147108085] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:41:23,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:41:23,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:41:23,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059525169] [2024-06-21 17:41:23,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:41:23,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:41:23,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:41:23,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:41:23,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:41:23,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:41:23,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 282 transitions, 3208 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:41:23,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:41:23,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:41:23,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:41:25,343 INFO L124 PetriNetUnfolderBase]: 3220/5115 cut-off events. [2024-06-21 17:41:25,343 INFO L125 PetriNetUnfolderBase]: For 303886/303886 co-relation queries the response was YES. [2024-06-21 17:41:25,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31787 conditions, 5115 events. 3220/5115 cut-off events. For 303886/303886 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 30267 event pairs, 774 based on Foata normal form. 12/5119 useless extension candidates. Maximal degree in co-relation 31687. Up to 4493 conditions per place. [2024-06-21 17:41:25,396 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 216 selfloop transitions, 82 changer transitions 0/303 dead transitions. [2024-06-21 17:41:25,396 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 303 transitions, 3982 flow [2024-06-21 17:41:25,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:41:25,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:41:25,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-21 17:41:25,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-06-21 17:41:25,397 INFO L175 Difference]: Start difference. First operand has 211 places, 282 transitions, 3208 flow. Second operand 8 states and 140 transitions. [2024-06-21 17:41:25,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 303 transitions, 3982 flow [2024-06-21 17:41:25,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 303 transitions, 3807 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-21 17:41:25,725 INFO L231 Difference]: Finished difference. Result has 213 places, 282 transitions, 3211 flow [2024-06-21 17:41:25,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3033, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3211, PETRI_PLACES=213, PETRI_TRANSITIONS=282} [2024-06-21 17:41:25,725 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 169 predicate places. [2024-06-21 17:41:25,725 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 282 transitions, 3211 flow [2024-06-21 17:41:25,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:41:25,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:41:25,726 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:41:25,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 17:41:25,726 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:41:25,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:41:25,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1577125518, now seen corresponding path program 1 times [2024-06-21 17:41:25,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:41:25,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180366901] [2024-06-21 17:41:25,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:41:25,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:41:25,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:41:27,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:41:27,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:41:27,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180366901] [2024-06-21 17:41:27,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180366901] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:41:27,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:41:27,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:41:27,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30993196] [2024-06-21 17:41:27,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:41:27,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:41:27,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:41:27,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:41:27,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:41:27,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:41:27,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 282 transitions, 3211 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:41:27,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:41:27,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:41:27,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:41:29,830 INFO L124 PetriNetUnfolderBase]: 3326/5304 cut-off events. [2024-06-21 17:41:29,830 INFO L125 PetriNetUnfolderBase]: For 318937/318941 co-relation queries the response was YES. [2024-06-21 17:41:29,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33574 conditions, 5304 events. 3326/5304 cut-off events. For 318937/318941 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 31837 event pairs, 887 based on Foata normal form. 6/5308 useless extension candidates. Maximal degree in co-relation 33473. Up to 4300 conditions per place. [2024-06-21 17:41:29,881 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 200 selfloop transitions, 121 changer transitions 0/326 dead transitions. [2024-06-21 17:41:29,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 326 transitions, 4346 flow [2024-06-21 17:41:29,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:41:29,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:41:29,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-21 17:41:29,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-21 17:41:29,883 INFO L175 Difference]: Start difference. First operand has 213 places, 282 transitions, 3211 flow. Second operand 7 states and 140 transitions. [2024-06-21 17:41:29,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 326 transitions, 4346 flow [2024-06-21 17:41:30,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 326 transitions, 4078 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-21 17:41:30,228 INFO L231 Difference]: Finished difference. Result has 211 places, 293 transitions, 3344 flow [2024-06-21 17:41:30,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2953, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3344, PETRI_PLACES=211, PETRI_TRANSITIONS=293} [2024-06-21 17:41:30,229 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 167 predicate places. [2024-06-21 17:41:30,229 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 293 transitions, 3344 flow [2024-06-21 17:41:30,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:41:30,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:41:30,229 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:41:30,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 17:41:30,230 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:41:30,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:41:30,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1152008516, now seen corresponding path program 2 times [2024-06-21 17:41:30,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:41:30,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270094974] [2024-06-21 17:41:30,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:41:30,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:41:30,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:41:32,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:41:32,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:41:32,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270094974] [2024-06-21 17:41:32,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270094974] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:41:32,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:41:32,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:41:32,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350373881] [2024-06-21 17:41:32,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:41:32,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:41:32,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:41:32,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:41:32,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:41:32,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:41:32,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 293 transitions, 3344 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) [2024-06-21 17:41:32,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:41:32,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:41:32,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:41:34,716 INFO L124 PetriNetUnfolderBase]: 3336/5317 cut-off events. [2024-06-21 17:41:34,716 INFO L125 PetriNetUnfolderBase]: For 329107/329107 co-relation queries the response was YES. [2024-06-21 17:41:34,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33915 conditions, 5317 events. 3336/5317 cut-off events. For 329107/329107 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 31851 event pairs, 892 based on Foata normal form. 2/5317 useless extension candidates. Maximal degree in co-relation 33814. Up to 4306 conditions per place. [2024-06-21 17:41:34,772 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 202 selfloop transitions, 121 changer transitions 0/328 dead transitions. [2024-06-21 17:41:34,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 328 transitions, 4253 flow [2024-06-21 17:41:34,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:41:34,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:41:34,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-21 17:41:34,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-21 17:41:34,774 INFO L175 Difference]: Start difference. First operand has 211 places, 293 transitions, 3344 flow. Second operand 8 states and 150 transitions. [2024-06-21 17:41:34,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 328 transitions, 4253 flow [2024-06-21 17:41:35,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 328 transitions, 4105 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 17:41:35,147 INFO L231 Difference]: Finished difference. Result has 216 places, 296 transitions, 3485 flow [2024-06-21 17:41:35,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3199, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3485, PETRI_PLACES=216, PETRI_TRANSITIONS=296} [2024-06-21 17:41:35,148 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 172 predicate places. [2024-06-21 17:41:35,148 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 296 transitions, 3485 flow [2024-06-21 17:41:35,148 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) [2024-06-21 17:41:35,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:41:35,148 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:41:35,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 17:41:35,148 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:41:35,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:41:35,149 INFO L85 PathProgramCache]: Analyzing trace with hash 141031008, now seen corresponding path program 3 times [2024-06-21 17:41:35,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:41:35,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804563274] [2024-06-21 17:41:35,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:41:35,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:41:35,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:41:37,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:41:37,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:41:37,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804563274] [2024-06-21 17:41:37,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804563274] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:41:37,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:41:37,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:41:37,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339161583] [2024-06-21 17:41:37,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:41:37,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:41:37,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:41:37,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:41:37,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:41:37,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:41:37,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 296 transitions, 3485 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:41:37,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:41:37,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:41:37,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:41:39,103 INFO L124 PetriNetUnfolderBase]: 3324/5280 cut-off events. [2024-06-21 17:41:39,104 INFO L125 PetriNetUnfolderBase]: For 336445/336445 co-relation queries the response was YES. [2024-06-21 17:41:39,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33856 conditions, 5280 events. 3324/5280 cut-off events. For 336445/336445 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 31431 event pairs, 837 based on Foata normal form. 4/5283 useless extension candidates. Maximal degree in co-relation 33754. Up to 4961 conditions per place. [2024-06-21 17:41:39,155 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 271 selfloop transitions, 45 changer transitions 0/321 dead transitions. [2024-06-21 17:41:39,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 321 transitions, 4209 flow [2024-06-21 17:41:39,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:41:39,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:41:39,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-21 17:41:39,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40988372093023256 [2024-06-21 17:41:39,156 INFO L175 Difference]: Start difference. First operand has 216 places, 296 transitions, 3485 flow. Second operand 8 states and 141 transitions. [2024-06-21 17:41:39,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 321 transitions, 4209 flow [2024-06-21 17:41:39,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 321 transitions, 3945 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-21 17:41:39,491 INFO L231 Difference]: Finished difference. Result has 218 places, 296 transitions, 3323 flow [2024-06-21 17:41:39,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3223, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3323, PETRI_PLACES=218, PETRI_TRANSITIONS=296} [2024-06-21 17:41:39,491 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 174 predicate places. [2024-06-21 17:41:39,491 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 296 transitions, 3323 flow [2024-06-21 17:41:39,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:41:39,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:41:39,491 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:41:39,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 17:41:39,492 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:41:39,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:41:39,492 INFO L85 PathProgramCache]: Analyzing trace with hash 989359712, now seen corresponding path program 4 times [2024-06-21 17:41:39,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:41:39,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929639706] [2024-06-21 17:41:39,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:41:39,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:41:39,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:41:42,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:41:42,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:41:42,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929639706] [2024-06-21 17:41:42,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929639706] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:41:42,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:41:42,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:41:42,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844201540] [2024-06-21 17:41:42,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:41:42,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:41:42,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:41:42,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:41:42,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:41:42,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:41:42,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 296 transitions, 3323 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) [2024-06-21 17:41:42,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:41:42,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:41:42,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:41:44,196 INFO L124 PetriNetUnfolderBase]: 3334/5306 cut-off events. [2024-06-21 17:41:44,197 INFO L125 PetriNetUnfolderBase]: For 340659/340659 co-relation queries the response was YES. [2024-06-21 17:41:44,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33515 conditions, 5306 events. 3334/5306 cut-off events. For 340659/340659 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 31683 event pairs, 1009 based on Foata normal form. 2/5300 useless extension candidates. Maximal degree in co-relation 33412. Up to 4301 conditions per place. [2024-06-21 17:41:44,249 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 209 selfloop transitions, 113 changer transitions 0/327 dead transitions. [2024-06-21 17:41:44,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 327 transitions, 4219 flow [2024-06-21 17:41:44,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:41:44,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:41:44,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-21 17:41:44,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41569767441860467 [2024-06-21 17:41:44,251 INFO L175 Difference]: Start difference. First operand has 218 places, 296 transitions, 3323 flow. Second operand 8 states and 143 transitions. [2024-06-21 17:41:44,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 327 transitions, 4219 flow [2024-06-21 17:41:44,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 327 transitions, 4129 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 17:41:44,653 INFO L231 Difference]: Finished difference. Result has 219 places, 299 transitions, 3505 flow [2024-06-21 17:41:44,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3233, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3505, PETRI_PLACES=219, PETRI_TRANSITIONS=299} [2024-06-21 17:41:44,653 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 175 predicate places. [2024-06-21 17:41:44,653 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 299 transitions, 3505 flow [2024-06-21 17:41:44,653 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) [2024-06-21 17:41:44,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:41:44,653 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:41:44,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 17:41:44,654 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:41:44,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:41:44,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1976941768, now seen corresponding path program 5 times [2024-06-21 17:41:44,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:41:44,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680960487] [2024-06-21 17:41:44,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:41:44,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:41:44,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:41:46,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:41:46,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:41:46,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680960487] [2024-06-21 17:41:46,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680960487] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:41:46,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:41:46,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:41:46,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633917703] [2024-06-21 17:41:46,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:41:46,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:41:46,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:41:46,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:41:46,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:41:46,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:41:46,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 299 transitions, 3505 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:41:46,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:41:46,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:41:46,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:41:48,792 INFO L124 PetriNetUnfolderBase]: 3344/5326 cut-off events. [2024-06-21 17:41:48,793 INFO L125 PetriNetUnfolderBase]: For 354072/354080 co-relation queries the response was YES. [2024-06-21 17:41:48,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34304 conditions, 5326 events. 3344/5326 cut-off events. For 354072/354080 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 31908 event pairs, 870 based on Foata normal form. 10/5332 useless extension candidates. Maximal degree in co-relation 34200. Up to 4307 conditions per place. [2024-06-21 17:41:48,848 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 214 selfloop transitions, 112 changer transitions 0/331 dead transitions. [2024-06-21 17:41:48,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 331 transitions, 4545 flow [2024-06-21 17:41:48,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:41:48,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:41:48,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-21 17:41:48,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-21 17:41:48,850 INFO L175 Difference]: Start difference. First operand has 219 places, 299 transitions, 3505 flow. Second operand 7 states and 133 transitions. [2024-06-21 17:41:48,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 331 transitions, 4545 flow [2024-06-21 17:41:49,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 331 transitions, 4392 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-21 17:41:49,321 INFO L231 Difference]: Finished difference. Result has 221 places, 302 transitions, 3625 flow [2024-06-21 17:41:49,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3354, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3625, PETRI_PLACES=221, PETRI_TRANSITIONS=302} [2024-06-21 17:41:49,322 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 177 predicate places. [2024-06-21 17:41:49,322 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 302 transitions, 3625 flow [2024-06-21 17:41:49,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:41:49,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:41:49,322 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:41:49,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 17:41:49,323 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:41:49,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:41:49,323 INFO L85 PathProgramCache]: Analyzing trace with hash -326759494, now seen corresponding path program 6 times [2024-06-21 17:41:49,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:41:49,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774147366] [2024-06-21 17:41:49,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:41:49,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:41:49,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:41:51,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:41:51,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:41:51,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774147366] [2024-06-21 17:41:51,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774147366] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:41:51,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:41:51,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:41:51,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626589494] [2024-06-21 17:41:51,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:41:51,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:41:51,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:41:51,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:41:51,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:41:51,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:41:51,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 302 transitions, 3625 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:41:51,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:41:51,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:41:51,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:41:53,548 INFO L124 PetriNetUnfolderBase]: 3318/5290 cut-off events. [2024-06-21 17:41:53,548 INFO L125 PetriNetUnfolderBase]: For 362578/362586 co-relation queries the response was YES. [2024-06-21 17:41:53,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33970 conditions, 5290 events. 3318/5290 cut-off events. For 362578/362586 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 31759 event pairs, 884 based on Foata normal form. 14/5300 useless extension candidates. Maximal degree in co-relation 33864. Up to 4288 conditions per place. [2024-06-21 17:41:53,604 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 216 selfloop transitions, 106 changer transitions 0/327 dead transitions. [2024-06-21 17:41:53,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 327 transitions, 4475 flow [2024-06-21 17:41:53,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:41:53,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:41:53,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-21 17:41:53,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318936877076412 [2024-06-21 17:41:53,606 INFO L175 Difference]: Start difference. First operand has 221 places, 302 transitions, 3625 flow. Second operand 7 states and 130 transitions. [2024-06-21 17:41:53,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 327 transitions, 4475 flow [2024-06-21 17:41:54,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 327 transitions, 4335 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-21 17:41:54,007 INFO L231 Difference]: Finished difference. Result has 225 places, 302 transitions, 3705 flow [2024-06-21 17:41:54,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3485, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3705, PETRI_PLACES=225, PETRI_TRANSITIONS=302} [2024-06-21 17:41:54,012 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 181 predicate places. [2024-06-21 17:41:54,012 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 302 transitions, 3705 flow [2024-06-21 17:41:54,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:41:54,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:41:54,013 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] [2024-06-21 17:41:54,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 17:41:54,013 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:41:54,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:41:54,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1806018588, now seen corresponding path program 7 times [2024-06-21 17:41:54,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:41:54,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666696484] [2024-06-21 17:41:54,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:41:54,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:41:54,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:41:56,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:41:56,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:41:56,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666696484] [2024-06-21 17:41:56,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666696484] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:41:56,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:41:56,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:41:56,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378520847] [2024-06-21 17:41:56,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:41:56,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:41:56,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:41:56,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:41:56,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:41:56,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:41:56,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 302 transitions, 3705 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) [2024-06-21 17:41:56,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:41:56,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:41:56,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:41:59,366 INFO L124 PetriNetUnfolderBase]: 3300/5264 cut-off events. [2024-06-21 17:41:59,366 INFO L125 PetriNetUnfolderBase]: For 361779/361779 co-relation queries the response was YES. [2024-06-21 17:41:59,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33683 conditions, 5264 events. 3300/5264 cut-off events. For 361779/361779 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 31517 event pairs, 948 based on Foata normal form. 6/5262 useless extension candidates. Maximal degree in co-relation 33576. Up to 4277 conditions per place. [2024-06-21 17:41:59,413 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 214 selfloop transitions, 116 changer transitions 0/335 dead transitions. [2024-06-21 17:41:59,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 335 transitions, 4721 flow [2024-06-21 17:41:59,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:41:59,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:41:59,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-21 17:41:59,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-06-21 17:41:59,415 INFO L175 Difference]: Start difference. First operand has 225 places, 302 transitions, 3705 flow. Second operand 10 states and 175 transitions. [2024-06-21 17:41:59,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 335 transitions, 4721 flow [2024-06-21 17:41:59,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 335 transitions, 4561 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-21 17:41:59,882 INFO L231 Difference]: Finished difference. Result has 230 places, 302 transitions, 3784 flow [2024-06-21 17:41:59,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3545, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3784, PETRI_PLACES=230, PETRI_TRANSITIONS=302} [2024-06-21 17:41:59,883 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 186 predicate places. [2024-06-21 17:41:59,883 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 302 transitions, 3784 flow [2024-06-21 17:41:59,883 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) [2024-06-21 17:41:59,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:41:59,883 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:41:59,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 17:41:59,884 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:41:59,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:41:59,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1373411582, now seen corresponding path program 8 times [2024-06-21 17:41:59,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:41:59,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114794360] [2024-06-21 17:41:59,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:41:59,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:41:59,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:42:02,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:42:02,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:42:02,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114794360] [2024-06-21 17:42:02,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114794360] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:42:02,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:42:02,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:42:02,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929489478] [2024-06-21 17:42:02,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:42:02,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:42:02,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:42:02,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:42:02,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:42:02,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:42:02,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 302 transitions, 3784 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) [2024-06-21 17:42:02,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:42:02,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:42:02,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:42:04,790 INFO L124 PetriNetUnfolderBase]: 3274/5226 cut-off events. [2024-06-21 17:42:04,791 INFO L125 PetriNetUnfolderBase]: For 360419/360419 co-relation queries the response was YES. [2024-06-21 17:42:04,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33350 conditions, 5226 events. 3274/5226 cut-off events. For 360419/360419 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 31303 event pairs, 948 based on Foata normal form. 6/5224 useless extension candidates. Maximal degree in co-relation 33242. Up to 4258 conditions per place. [2024-06-21 17:42:04,838 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 212 selfloop transitions, 112 changer transitions 0/329 dead transitions. [2024-06-21 17:42:04,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 329 transitions, 4646 flow [2024-06-21 17:42:04,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:42:04,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:42:04,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 17:42:04,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42151162790697677 [2024-06-21 17:42:04,840 INFO L175 Difference]: Start difference. First operand has 230 places, 302 transitions, 3784 flow. Second operand 8 states and 145 transitions. [2024-06-21 17:42:04,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 329 transitions, 4646 flow [2024-06-21 17:42:05,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 329 transitions, 4305 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-21 17:42:05,362 INFO L231 Difference]: Finished difference. Result has 229 places, 302 transitions, 3676 flow [2024-06-21 17:42:05,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3443, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3676, PETRI_PLACES=229, PETRI_TRANSITIONS=302} [2024-06-21 17:42:05,363 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 185 predicate places. [2024-06-21 17:42:05,363 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 302 transitions, 3676 flow [2024-06-21 17:42:05,363 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) [2024-06-21 17:42:05,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:42:05,363 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:42:05,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 17:42:05,363 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:42:05,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:42:05,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1829282908, now seen corresponding path program 9 times [2024-06-21 17:42:05,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:42:05,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135232823] [2024-06-21 17:42:05,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:42:05,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:42:05,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:42:08,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:42:08,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:42:08,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135232823] [2024-06-21 17:42:08,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135232823] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:42:08,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:42:08,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:42:08,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778222279] [2024-06-21 17:42:08,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:42:08,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:42:08,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:42:08,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:42:08,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:42:08,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:42:08,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 302 transitions, 3676 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:42:08,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:42:08,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:42:08,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:42:09,850 INFO L124 PetriNetUnfolderBase]: 3256/5187 cut-off events. [2024-06-21 17:42:09,851 INFO L125 PetriNetUnfolderBase]: For 350917/350917 co-relation queries the response was YES. [2024-06-21 17:42:09,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32746 conditions, 5187 events. 3256/5187 cut-off events. For 350917/350917 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 30932 event pairs, 782 based on Foata normal form. 6/5185 useless extension candidates. Maximal degree in co-relation 32638. Up to 4535 conditions per place. [2024-06-21 17:42:09,903 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 235 selfloop transitions, 83 changer transitions 0/323 dead transitions. [2024-06-21 17:42:09,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 323 transitions, 4508 flow [2024-06-21 17:42:09,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:42:09,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:42:09,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-21 17:42:09,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40406976744186046 [2024-06-21 17:42:09,904 INFO L175 Difference]: Start difference. First operand has 229 places, 302 transitions, 3676 flow. Second operand 8 states and 139 transitions. [2024-06-21 17:42:09,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 323 transitions, 4508 flow [2024-06-21 17:42:10,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 323 transitions, 4337 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 17:42:10,560 INFO L231 Difference]: Finished difference. Result has 231 places, 302 transitions, 3680 flow [2024-06-21 17:42:10,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3505, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3680, PETRI_PLACES=231, PETRI_TRANSITIONS=302} [2024-06-21 17:42:10,561 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 187 predicate places. [2024-06-21 17:42:10,561 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 302 transitions, 3680 flow [2024-06-21 17:42:10,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:42:10,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:42:10,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:42:10,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 17:42:10,561 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:42:10,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:42:10,562 INFO L85 PathProgramCache]: Analyzing trace with hash 59221458, now seen corresponding path program 10 times [2024-06-21 17:42:10,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:42:10,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787617932] [2024-06-21 17:42:10,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:42:10,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:42:10,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:42:13,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:42:13,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:42:13,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787617932] [2024-06-21 17:42:13,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787617932] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:42:13,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:42:13,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:42:13,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559783376] [2024-06-21 17:42:13,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:42:13,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:42:13,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:42:13,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:42:13,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:42:13,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:42:13,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 302 transitions, 3680 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:42:13,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:42:13,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:42:13,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:42:14,843 INFO L124 PetriNetUnfolderBase]: 3204/5119 cut-off events. [2024-06-21 17:42:14,843 INFO L125 PetriNetUnfolderBase]: For 345620/345620 co-relation queries the response was YES. [2024-06-21 17:42:14,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31469 conditions, 5119 events. 3204/5119 cut-off events. For 345620/345620 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 30572 event pairs, 768 based on Foata normal form. 12/5123 useless extension candidates. Maximal degree in co-relation 31359. Up to 4497 conditions per place. [2024-06-21 17:42:14,890 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 233 selfloop transitions, 88 changer transitions 0/326 dead transitions. [2024-06-21 17:42:14,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 326 transitions, 4401 flow [2024-06-21 17:42:14,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:42:14,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:42:14,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-21 17:42:14,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40310077519379844 [2024-06-21 17:42:14,891 INFO L175 Difference]: Start difference. First operand has 231 places, 302 transitions, 3680 flow. Second operand 9 states and 156 transitions. [2024-06-21 17:42:14,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 326 transitions, 4401 flow [2024-06-21 17:42:15,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 326 transitions, 4175 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-21 17:42:15,376 INFO L231 Difference]: Finished difference. Result has 233 places, 302 transitions, 3643 flow [2024-06-21 17:42:15,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3454, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3643, PETRI_PLACES=233, PETRI_TRANSITIONS=302} [2024-06-21 17:42:15,376 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 189 predicate places. [2024-06-21 17:42:15,376 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 302 transitions, 3643 flow [2024-06-21 17:42:15,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:42:15,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:42:15,377 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:42:15,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 17:42:15,377 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:42:15,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:42:15,377 INFO L85 PathProgramCache]: Analyzing trace with hash 34265176, now seen corresponding path program 1 times [2024-06-21 17:42:15,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:42:15,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577507701] [2024-06-21 17:42:15,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:42:15,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:42:15,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:42:18,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:42:18,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:42:18,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577507701] [2024-06-21 17:42:18,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577507701] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:42:18,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:42:18,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:42:18,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781865071] [2024-06-21 17:42:18,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:42:18,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:42:18,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:42:18,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:42:18,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:42:18,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:42:18,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 302 transitions, 3643 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) [2024-06-21 17:42:18,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:42:18,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:42:18,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:42:20,534 INFO L124 PetriNetUnfolderBase]: 3256/5207 cut-off events. [2024-06-21 17:42:20,534 INFO L125 PetriNetUnfolderBase]: For 358383/358383 co-relation queries the response was YES. [2024-06-21 17:42:20,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31923 conditions, 5207 events. 3256/5207 cut-off events. For 358383/358383 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 31280 event pairs, 784 based on Foata normal form. 14/5213 useless extension candidates. Maximal degree in co-relation 31812. Up to 4837 conditions per place. [2024-06-21 17:42:20,588 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 288 selfloop transitions, 33 changer transitions 0/326 dead transitions. [2024-06-21 17:42:20,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 326 transitions, 4410 flow [2024-06-21 17:42:20,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:42:20,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:42:20,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-21 17:42:20,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4053156146179402 [2024-06-21 17:42:20,590 INFO L175 Difference]: Start difference. First operand has 233 places, 302 transitions, 3643 flow. Second operand 7 states and 122 transitions. [2024-06-21 17:42:20,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 326 transitions, 4410 flow [2024-06-21 17:42:21,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 326 transitions, 4086 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-06-21 17:42:21,056 INFO L231 Difference]: Finished difference. Result has 229 places, 304 transitions, 3425 flow [2024-06-21 17:42:21,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3320, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3425, PETRI_PLACES=229, PETRI_TRANSITIONS=304} [2024-06-21 17:42:21,057 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 185 predicate places. [2024-06-21 17:42:21,057 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 304 transitions, 3425 flow [2024-06-21 17:42:21,057 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) [2024-06-21 17:42:21,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:42:21,057 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:42:21,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 17:42:21,057 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:42:21,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:42:21,058 INFO L85 PathProgramCache]: Analyzing trace with hash 34770166, now seen corresponding path program 2 times [2024-06-21 17:42:21,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:42:21,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854689043] [2024-06-21 17:42:21,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:42:21,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:42:21,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:42:24,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:42:24,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:42:24,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854689043] [2024-06-21 17:42:24,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854689043] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:42:24,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:42:24,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:42:24,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074977870] [2024-06-21 17:42:24,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:42:24,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:42:24,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:42:24,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:42:24,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:42:24,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:42:24,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 304 transitions, 3425 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) [2024-06-21 17:42:24,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:42:24,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:42:24,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:42:26,060 INFO L124 PetriNetUnfolderBase]: 3317/5298 cut-off events. [2024-06-21 17:42:26,060 INFO L125 PetriNetUnfolderBase]: For 363909/363909 co-relation queries the response was YES. [2024-06-21 17:42:26,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32633 conditions, 5298 events. 3317/5298 cut-off events. For 363909/363909 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 31820 event pairs, 801 based on Foata normal form. 8/5298 useless extension candidates. Maximal degree in co-relation 32522. Up to 4777 conditions per place. [2024-06-21 17:42:26,117 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 295 selfloop transitions, 32 changer transitions 0/332 dead transitions. [2024-06-21 17:42:26,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 332 transitions, 4375 flow [2024-06-21 17:42:26,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:42:26,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:42:26,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-21 17:42:26,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40863787375415284 [2024-06-21 17:42:26,118 INFO L175 Difference]: Start difference. First operand has 229 places, 304 transitions, 3425 flow. Second operand 7 states and 123 transitions. [2024-06-21 17:42:26,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 332 transitions, 4375 flow [2024-06-21 17:42:26,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 332 transitions, 4294 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-21 17:42:26,770 INFO L231 Difference]: Finished difference. Result has 231 places, 306 transitions, 3446 flow [2024-06-21 17:42:26,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3344, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3446, PETRI_PLACES=231, PETRI_TRANSITIONS=306} [2024-06-21 17:42:26,771 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 187 predicate places. [2024-06-21 17:42:26,771 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 306 transitions, 3446 flow [2024-06-21 17:42:26,771 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) [2024-06-21 17:42:26,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:42:26,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:42:26,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 17:42:26,772 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:42:26,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:42:26,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1258012222, now seen corresponding path program 1 times [2024-06-21 17:42:26,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:42:26,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264060109] [2024-06-21 17:42:26,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:42:26,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:42:26,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:42:29,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:42:29,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:42:29,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264060109] [2024-06-21 17:42:29,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264060109] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:42:29,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:42:29,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:42:29,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611158532] [2024-06-21 17:42:29,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:42:29,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:42:29,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:42:29,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:42:29,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:42:29,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:42:29,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 306 transitions, 3446 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) [2024-06-21 17:42:29,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:42:29,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:42:29,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:42:31,389 INFO L124 PetriNetUnfolderBase]: 3325/5337 cut-off events. [2024-06-21 17:42:31,389 INFO L125 PetriNetUnfolderBase]: For 359514/359516 co-relation queries the response was YES. [2024-06-21 17:42:31,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32860 conditions, 5337 events. 3325/5337 cut-off events. For 359514/359516 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 32301 event pairs, 865 based on Foata normal form. 4/5340 useless extension candidates. Maximal degree in co-relation 32748. Up to 5020 conditions per place. [2024-06-21 17:42:31,448 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 299 selfloop transitions, 30 changer transitions 0/334 dead transitions. [2024-06-21 17:42:31,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 334 transitions, 4398 flow [2024-06-21 17:42:31,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:42:31,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:42:31,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-21 17:42:31,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4053156146179402 [2024-06-21 17:42:31,449 INFO L175 Difference]: Start difference. First operand has 231 places, 306 transitions, 3446 flow. Second operand 7 states and 122 transitions. [2024-06-21 17:42:31,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 334 transitions, 4398 flow [2024-06-21 17:42:31,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 334 transitions, 4355 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-21 17:42:31,945 INFO L231 Difference]: Finished difference. Result has 235 places, 310 transitions, 3544 flow [2024-06-21 17:42:31,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3403, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3544, PETRI_PLACES=235, PETRI_TRANSITIONS=310} [2024-06-21 17:42:31,946 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 191 predicate places. [2024-06-21 17:42:31,946 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 310 transitions, 3544 flow [2024-06-21 17:42:31,946 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) [2024-06-21 17:42:31,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:42:31,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:42:31,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 17:42:31,947 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:42:31,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:42:31,947 INFO L85 PathProgramCache]: Analyzing trace with hash -329546084, now seen corresponding path program 2 times [2024-06-21 17:42:31,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:42:31,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939948617] [2024-06-21 17:42:31,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:42:31,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:42:31,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:42:34,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:42:34,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:42:34,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939948617] [2024-06-21 17:42:34,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939948617] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:42:34,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:42:34,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:42:34,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386973292] [2024-06-21 17:42:34,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:42:34,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:42:34,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:42:34,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:42:34,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:42:34,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:42:34,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 310 transitions, 3544 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) [2024-06-21 17:42:34,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:42:34,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:42:34,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:42:36,707 INFO L124 PetriNetUnfolderBase]: 3333/5337 cut-off events. [2024-06-21 17:42:36,707 INFO L125 PetriNetUnfolderBase]: For 369456/369458 co-relation queries the response was YES. [2024-06-21 17:42:36,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33218 conditions, 5337 events. 3333/5337 cut-off events. For 369456/369458 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 32229 event pairs, 901 based on Foata normal form. 4/5340 useless extension candidates. Maximal degree in co-relation 33104. Up to 5069 conditions per place. [2024-06-21 17:42:36,765 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 299 selfloop transitions, 27 changer transitions 0/331 dead transitions. [2024-06-21 17:42:36,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 331 transitions, 4296 flow [2024-06-21 17:42:36,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:42:36,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:42:36,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-21 17:42:36,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38870431893687707 [2024-06-21 17:42:36,766 INFO L175 Difference]: Start difference. First operand has 235 places, 310 transitions, 3544 flow. Second operand 7 states and 117 transitions. [2024-06-21 17:42:36,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 331 transitions, 4296 flow [2024-06-21 17:42:37,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 331 transitions, 4204 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-21 17:42:37,319 INFO L231 Difference]: Finished difference. Result has 239 places, 312 transitions, 3555 flow [2024-06-21 17:42:37,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3468, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3555, PETRI_PLACES=239, PETRI_TRANSITIONS=312} [2024-06-21 17:42:37,319 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 195 predicate places. [2024-06-21 17:42:37,319 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 312 transitions, 3555 flow [2024-06-21 17:42:37,319 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) [2024-06-21 17:42:37,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:42:37,319 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:42:37,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 17:42:37,320 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:42:37,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:42:37,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1806295418, now seen corresponding path program 3 times [2024-06-21 17:42:37,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:42:37,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443130157] [2024-06-21 17:42:37,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:42:37,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:42:37,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:42:40,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:42:40,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:42:40,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443130157] [2024-06-21 17:42:40,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443130157] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:42:40,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:42:40,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:42:40,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226728179] [2024-06-21 17:42:40,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:42:40,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:42:40,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:42:40,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:42:40,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:42:40,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:42:40,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 312 transitions, 3555 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) [2024-06-21 17:42:40,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:42:40,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:42:40,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:42:42,640 INFO L124 PetriNetUnfolderBase]: 3341/5347 cut-off events. [2024-06-21 17:42:42,640 INFO L125 PetriNetUnfolderBase]: For 378899/378899 co-relation queries the response was YES. [2024-06-21 17:42:42,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33381 conditions, 5347 events. 3341/5347 cut-off events. For 378899/378899 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 32322 event pairs, 916 based on Foata normal form. 2/5347 useless extension candidates. Maximal degree in co-relation 33265. Up to 5081 conditions per place. [2024-06-21 17:42:42,695 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 300 selfloop transitions, 29 changer transitions 0/334 dead transitions. [2024-06-21 17:42:42,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 334 transitions, 4303 flow [2024-06-21 17:42:42,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:42:42,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:42:42,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-21 17:42:42,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-21 17:42:42,696 INFO L175 Difference]: Start difference. First operand has 239 places, 312 transitions, 3555 flow. Second operand 8 states and 129 transitions. [2024-06-21 17:42:42,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 334 transitions, 4303 flow [2024-06-21 17:42:43,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 334 transitions, 4236 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-21 17:42:43,369 INFO L231 Difference]: Finished difference. Result has 242 places, 314 transitions, 3583 flow [2024-06-21 17:42:43,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3488, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3583, PETRI_PLACES=242, PETRI_TRANSITIONS=314} [2024-06-21 17:42:43,370 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 198 predicate places. [2024-06-21 17:42:43,370 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 314 transitions, 3583 flow [2024-06-21 17:42:43,370 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) [2024-06-21 17:42:43,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:42:43,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:42:43,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 17:42:43,370 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:42:43,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:42:43,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1373606200, now seen corresponding path program 1 times [2024-06-21 17:42:43,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:42:43,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834776381] [2024-06-21 17:42:43,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:42:43,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:42:43,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:42:46,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:42:46,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:42:46,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834776381] [2024-06-21 17:42:46,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834776381] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:42:46,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:42:46,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:42:46,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760399168] [2024-06-21 17:42:46,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:42:46,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:42:46,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:42:46,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:42:46,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:42:46,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:42:46,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 314 transitions, 3583 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) [2024-06-21 17:42:46,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:42:46,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:42:46,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:42:48,689 INFO L124 PetriNetUnfolderBase]: 3357/5363 cut-off events. [2024-06-21 17:42:48,689 INFO L125 PetriNetUnfolderBase]: For 395173/395173 co-relation queries the response was YES. [2024-06-21 17:42:48,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33713 conditions, 5363 events. 3357/5363 cut-off events. For 395173/395173 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 32305 event pairs, 1006 based on Foata normal form. 4/5358 useless extension candidates. Maximal degree in co-relation 33596. Up to 4415 conditions per place. [2024-06-21 17:42:48,767 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 220 selfloop transitions, 116 changer transitions 0/341 dead transitions. [2024-06-21 17:42:48,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 341 transitions, 4391 flow [2024-06-21 17:42:48,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:42:48,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:42:48,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-21 17:42:48,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-06-21 17:42:48,769 INFO L175 Difference]: Start difference. First operand has 242 places, 314 transitions, 3583 flow. Second operand 8 states and 140 transitions. [2024-06-21 17:42:48,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 341 transitions, 4391 flow [2024-06-21 17:42:49,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 341 transitions, 4316 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-21 17:42:49,728 INFO L231 Difference]: Finished difference. Result has 244 places, 317 transitions, 3814 flow [2024-06-21 17:42:49,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3508, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3814, PETRI_PLACES=244, PETRI_TRANSITIONS=317} [2024-06-21 17:42:49,728 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 200 predicate places. [2024-06-21 17:42:49,728 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 317 transitions, 3814 flow [2024-06-21 17:42:49,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:42:49,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:42:49,729 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:42:49,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 17:42:49,729 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:42:49,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:42:49,730 INFO L85 PathProgramCache]: Analyzing trace with hash 1829292828, now seen corresponding path program 4 times [2024-06-21 17:42:49,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:42:49,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494860159] [2024-06-21 17:42:49,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:42:49,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:42:49,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:42:52,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:42:52,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:42:52,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494860159] [2024-06-21 17:42:52,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494860159] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:42:52,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:42:52,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:42:52,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582300011] [2024-06-21 17:42:52,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:42:52,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:42:52,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:42:52,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:42:52,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:42:53,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:42:53,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 317 transitions, 3814 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) [2024-06-21 17:42:53,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:42:53,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:42:53,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:42:54,556 INFO L124 PetriNetUnfolderBase]: 3352/5353 cut-off events. [2024-06-21 17:42:54,556 INFO L125 PetriNetUnfolderBase]: For 396732/396732 co-relation queries the response was YES. [2024-06-21 17:42:54,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34293 conditions, 5353 events. 3352/5353 cut-off events. For 396732/396732 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 32340 event pairs, 956 based on Foata normal form. 2/5354 useless extension candidates. Maximal degree in co-relation 34175. Up to 5148 conditions per place. [2024-06-21 17:42:54,612 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 311 selfloop transitions, 16 changer transitions 0/332 dead transitions. [2024-06-21 17:42:54,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 332 transitions, 4512 flow [2024-06-21 17:42:54,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:42:54,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:42:54,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-21 17:42:54,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35174418604651164 [2024-06-21 17:42:54,613 INFO L175 Difference]: Start difference. First operand has 244 places, 317 transitions, 3814 flow. Second operand 8 states and 121 transitions. [2024-06-21 17:42:54,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 332 transitions, 4512 flow [2024-06-21 17:42:55,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 332 transitions, 4214 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-21 17:42:55,300 INFO L231 Difference]: Finished difference. Result has 246 places, 317 transitions, 3553 flow [2024-06-21 17:42:55,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3516, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3553, PETRI_PLACES=246, PETRI_TRANSITIONS=317} [2024-06-21 17:42:55,301 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 202 predicate places. [2024-06-21 17:42:55,301 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 317 transitions, 3553 flow [2024-06-21 17:42:55,301 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) [2024-06-21 17:42:55,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:42:55,301 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:42:55,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 17:42:55,301 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:42:55,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:42:55,301 INFO L85 PathProgramCache]: Analyzing trace with hash 494237576, now seen corresponding path program 2 times [2024-06-21 17:42:55,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:42:55,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372297305] [2024-06-21 17:42:55,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:42:55,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:42:55,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:42:59,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:42:59,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:42:59,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372297305] [2024-06-21 17:42:59,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372297305] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:42:59,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:42:59,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:42:59,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568768215] [2024-06-21 17:42:59,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:42:59,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:42:59,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:42:59,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:42:59,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:42:59,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:42:59,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 317 transitions, 3553 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) [2024-06-21 17:42:59,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:42:59,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:42:59,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:43:01,214 INFO L124 PetriNetUnfolderBase]: 3404/5413 cut-off events. [2024-06-21 17:43:01,214 INFO L125 PetriNetUnfolderBase]: For 440907/440907 co-relation queries the response was YES. [2024-06-21 17:43:01,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34319 conditions, 5413 events. 3404/5413 cut-off events. For 440907/440907 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 32474 event pairs, 794 based on Foata normal form. 14/5419 useless extension candidates. Maximal degree in co-relation 34200. Up to 4751 conditions per place. [2024-06-21 17:43:01,272 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 247 selfloop transitions, 96 changer transitions 0/348 dead transitions. [2024-06-21 17:43:01,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 348 transitions, 4395 flow [2024-06-21 17:43:01,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:43:01,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:43:01,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 172 transitions. [2024-06-21 17:43:01,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 17:43:01,274 INFO L175 Difference]: Start difference. First operand has 246 places, 317 transitions, 3553 flow. Second operand 10 states and 172 transitions. [2024-06-21 17:43:01,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 348 transitions, 4395 flow [2024-06-21 17:43:01,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 348 transitions, 4344 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-21 17:43:01,966 INFO L231 Difference]: Finished difference. Result has 249 places, 320 transitions, 3776 flow [2024-06-21 17:43:01,966 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3502, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3776, PETRI_PLACES=249, PETRI_TRANSITIONS=320} [2024-06-21 17:43:01,966 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 205 predicate places. [2024-06-21 17:43:01,966 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 320 transitions, 3776 flow [2024-06-21 17:43:01,966 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) [2024-06-21 17:43:01,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:43:01,966 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:43:01,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 17:43:01,966 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:43:01,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:43:01,967 INFO L85 PathProgramCache]: Analyzing trace with hash 34777110, now seen corresponding path program 3 times [2024-06-21 17:43:01,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:43:01,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202430749] [2024-06-21 17:43:01,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:43:01,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:43:01,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:43:05,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:43:05,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:43:05,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202430749] [2024-06-21 17:43:05,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202430749] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:43:05,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:43:05,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:43:05,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613603626] [2024-06-21 17:43:05,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:43:05,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:43:05,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:43:05,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:43:05,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:43:05,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:43:05,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 320 transitions, 3776 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) [2024-06-21 17:43:05,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:43:05,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:43:05,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:43:07,527 INFO L124 PetriNetUnfolderBase]: 3924/6227 cut-off events. [2024-06-21 17:43:07,527 INFO L125 PetriNetUnfolderBase]: For 706068/706068 co-relation queries the response was YES. [2024-06-21 17:43:07,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45174 conditions, 6227 events. 3924/6227 cut-off events. For 706068/706068 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 37629 event pairs, 968 based on Foata normal form. 14/6233 useless extension candidates. Maximal degree in co-relation 45054. Up to 4672 conditions per place. [2024-06-21 17:43:07,607 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 258 selfloop transitions, 100 changer transitions 0/363 dead transitions. [2024-06-21 17:43:07,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 363 transitions, 4930 flow [2024-06-21 17:43:07,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:43:07,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:43:07,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 179 transitions. [2024-06-21 17:43:07,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41627906976744183 [2024-06-21 17:43:07,608 INFO L175 Difference]: Start difference. First operand has 249 places, 320 transitions, 3776 flow. Second operand 10 states and 179 transitions. [2024-06-21 17:43:07,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 363 transitions, 4930 flow [2024-06-21 17:43:08,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 363 transitions, 4688 flow, removed 28 selfloop flow, removed 8 redundant places. [2024-06-21 17:43:08,684 INFO L231 Difference]: Finished difference. Result has 252 places, 326 transitions, 3898 flow [2024-06-21 17:43:08,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3534, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3898, PETRI_PLACES=252, PETRI_TRANSITIONS=326} [2024-06-21 17:43:08,684 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 208 predicate places. [2024-06-21 17:43:08,684 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 326 transitions, 3898 flow [2024-06-21 17:43:08,685 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) [2024-06-21 17:43:08,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:43:08,685 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:43:08,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 17:43:08,685 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:43:08,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:43:08,685 INFO L85 PathProgramCache]: Analyzing trace with hash -201694920, now seen corresponding path program 4 times [2024-06-21 17:43:08,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:43:08,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716992297] [2024-06-21 17:43:08,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:43:08,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:43:08,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:43:12,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:43:12,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:43:12,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716992297] [2024-06-21 17:43:12,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716992297] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:43:12,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:43:12,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:43:12,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348385329] [2024-06-21 17:43:12,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:43:12,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:43:12,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:43:12,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:43:12,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:43:12,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:43:12,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 326 transitions, 3898 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) [2024-06-21 17:43:12,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:43:12,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:43:12,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:43:14,096 INFO L124 PetriNetUnfolderBase]: 3891/6176 cut-off events. [2024-06-21 17:43:14,096 INFO L125 PetriNetUnfolderBase]: For 672485/672485 co-relation queries the response was YES. [2024-06-21 17:43:14,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43920 conditions, 6176 events. 3891/6176 cut-off events. For 672485/672485 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 37368 event pairs, 1017 based on Foata normal form. 14/6182 useless extension candidates. Maximal degree in co-relation 43798. Up to 5504 conditions per place. [2024-06-21 17:43:14,159 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 260 selfloop transitions, 89 changer transitions 0/354 dead transitions. [2024-06-21 17:43:14,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 354 transitions, 4760 flow [2024-06-21 17:43:14,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:43:14,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:43:14,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-21 17:43:14,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4005167958656331 [2024-06-21 17:43:14,164 INFO L175 Difference]: Start difference. First operand has 252 places, 326 transitions, 3898 flow. Second operand 9 states and 155 transitions. [2024-06-21 17:43:14,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 354 transitions, 4760 flow [2024-06-21 17:43:15,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 354 transitions, 4564 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-21 17:43:15,210 INFO L231 Difference]: Finished difference. Result has 255 places, 329 transitions, 3976 flow [2024-06-21 17:43:15,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3706, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3976, PETRI_PLACES=255, PETRI_TRANSITIONS=329} [2024-06-21 17:43:15,210 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 211 predicate places. [2024-06-21 17:43:15,210 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 329 transitions, 3976 flow [2024-06-21 17:43:15,210 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) [2024-06-21 17:43:15,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:43:15,210 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:43:15,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 17:43:15,211 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:43:15,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:43:15,211 INFO L85 PathProgramCache]: Analyzing trace with hash 873823609, now seen corresponding path program 1 times [2024-06-21 17:43:15,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:43:15,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182085287] [2024-06-21 17:43:15,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:43:15,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:43:15,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:43:18,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:43:18,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:43:18,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182085287] [2024-06-21 17:43:18,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182085287] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:43:18,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:43:18,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:43:18,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432784166] [2024-06-21 17:43:18,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:43:18,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:43:18,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:43:18,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:43:18,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:43:18,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:43:18,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 329 transitions, 3976 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) [2024-06-21 17:43:18,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:43:18,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:43:18,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:43:20,374 INFO L124 PetriNetUnfolderBase]: 3906/6224 cut-off events. [2024-06-21 17:43:20,375 INFO L125 PetriNetUnfolderBase]: For 650008/650008 co-relation queries the response was YES. [2024-06-21 17:43:20,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43969 conditions, 6224 events. 3906/6224 cut-off events. For 650008/650008 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 37930 event pairs, 958 based on Foata normal form. 2/6225 useless extension candidates. Maximal degree in co-relation 43845. Up to 5764 conditions per place. [2024-06-21 17:43:20,445 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 329 selfloop transitions, 42 changer transitions 0/376 dead transitions. [2024-06-21 17:43:20,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 376 transitions, 5104 flow [2024-06-21 17:43:20,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:43:20,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:43:20,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-21 17:43:20,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4563953488372093 [2024-06-21 17:43:20,447 INFO L175 Difference]: Start difference. First operand has 255 places, 329 transitions, 3976 flow. Second operand 8 states and 157 transitions. [2024-06-21 17:43:20,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 376 transitions, 5104 flow [2024-06-21 17:43:21,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 376 transitions, 4872 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-21 17:43:21,413 INFO L231 Difference]: Finished difference. Result has 257 places, 334 transitions, 3937 flow [2024-06-21 17:43:21,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3744, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3937, PETRI_PLACES=257, PETRI_TRANSITIONS=334} [2024-06-21 17:43:21,413 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 213 predicate places. [2024-06-21 17:43:21,414 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 334 transitions, 3937 flow [2024-06-21 17:43:21,414 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) [2024-06-21 17:43:21,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:43:21,414 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:43:21,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 17:43:21,414 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:43:21,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:43:21,414 INFO L85 PathProgramCache]: Analyzing trace with hash -176028601, now seen corresponding path program 2 times [2024-06-21 17:43:21,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:43:21,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489329661] [2024-06-21 17:43:21,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:43:21,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:43:21,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:43:24,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:43:24,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:43:24,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489329661] [2024-06-21 17:43:24,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489329661] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:43:24,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:43:24,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:43:24,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608435836] [2024-06-21 17:43:24,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:43:24,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:43:24,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:43:24,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:43:24,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:43:24,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:43:24,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 334 transitions, 3937 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) [2024-06-21 17:43:24,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:43:24,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:43:24,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:43:27,047 INFO L124 PetriNetUnfolderBase]: 3919/6245 cut-off events. [2024-06-21 17:43:27,048 INFO L125 PetriNetUnfolderBase]: For 661619/661619 co-relation queries the response was YES. [2024-06-21 17:43:27,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43825 conditions, 6245 events. 3919/6245 cut-off events. For 661619/661619 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 38190 event pairs, 1115 based on Foata normal form. 2/6246 useless extension candidates. Maximal degree in co-relation 43699. Up to 5911 conditions per place. [2024-06-21 17:43:27,131 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 327 selfloop transitions, 39 changer transitions 0/371 dead transitions. [2024-06-21 17:43:27,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 371 transitions, 4851 flow [2024-06-21 17:43:27,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:43:27,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:43:27,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-21 17:43:27,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-21 17:43:27,133 INFO L175 Difference]: Start difference. First operand has 257 places, 334 transitions, 3937 flow. Second operand 8 states and 147 transitions. [2024-06-21 17:43:27,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 371 transitions, 4851 flow [2024-06-21 17:43:28,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 371 transitions, 4662 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-21 17:43:28,303 INFO L231 Difference]: Finished difference. Result has 261 places, 339 transitions, 3915 flow [2024-06-21 17:43:28,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3768, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3915, PETRI_PLACES=261, PETRI_TRANSITIONS=339} [2024-06-21 17:43:28,304 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 217 predicate places. [2024-06-21 17:43:28,304 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 339 transitions, 3915 flow [2024-06-21 17:43:28,304 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) [2024-06-21 17:43:28,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:43:28,304 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:43:28,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 17:43:28,304 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:43:28,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:43:28,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1410526763, now seen corresponding path program 1 times [2024-06-21 17:43:28,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:43:28,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310516287] [2024-06-21 17:43:28,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:43:28,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:43:28,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:43:31,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:43:31,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:43:31,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310516287] [2024-06-21 17:43:31,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310516287] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:43:31,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:43:31,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:43:31,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529690001] [2024-06-21 17:43:31,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:43:31,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:43:31,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:43:31,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:43:31,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:43:31,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:43:31,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 339 transitions, 3915 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) [2024-06-21 17:43:31,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:43:31,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:43:31,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:43:33,716 INFO L124 PetriNetUnfolderBase]: 3940/6279 cut-off events. [2024-06-21 17:43:33,716 INFO L125 PetriNetUnfolderBase]: For 679780/679780 co-relation queries the response was YES. [2024-06-21 17:43:33,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44176 conditions, 6279 events. 3940/6279 cut-off events. For 679780/679780 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 38421 event pairs, 1085 based on Foata normal form. 1/6279 useless extension candidates. Maximal degree in co-relation 44049. Up to 5814 conditions per place. [2024-06-21 17:43:33,785 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 321 selfloop transitions, 64 changer transitions 0/390 dead transitions. [2024-06-21 17:43:33,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 390 transitions, 5098 flow [2024-06-21 17:43:33,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:43:33,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:43:33,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-21 17:43:33,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45219638242894056 [2024-06-21 17:43:33,787 INFO L175 Difference]: Start difference. First operand has 261 places, 339 transitions, 3915 flow. Second operand 9 states and 175 transitions. [2024-06-21 17:43:33,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 390 transitions, 5098 flow [2024-06-21 17:43:34,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 390 transitions, 5009 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-21 17:43:34,816 INFO L231 Difference]: Finished difference. Result has 266 places, 345 transitions, 4089 flow [2024-06-21 17:43:34,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3826, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4089, PETRI_PLACES=266, PETRI_TRANSITIONS=345} [2024-06-21 17:43:34,816 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 222 predicate places. [2024-06-21 17:43:34,816 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 345 transitions, 4089 flow [2024-06-21 17:43:34,816 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) [2024-06-21 17:43:34,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:43:34,817 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:43:34,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 17:43:34,817 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:43:34,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:43:34,817 INFO L85 PathProgramCache]: Analyzing trace with hash 72224309, now seen corresponding path program 3 times [2024-06-21 17:43:34,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:43:34,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358679616] [2024-06-21 17:43:34,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:43:34,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:43:34,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:43:38,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:43:38,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:43:38,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358679616] [2024-06-21 17:43:38,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358679616] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:43:38,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:43:38,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:43:38,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141176214] [2024-06-21 17:43:38,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:43:38,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:43:38,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:43:38,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:43:38,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:43:38,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:43:38,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 345 transitions, 4089 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) [2024-06-21 17:43:38,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:43:38,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:43:38,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:43:40,547 INFO L124 PetriNetUnfolderBase]: 3935/6265 cut-off events. [2024-06-21 17:43:40,548 INFO L125 PetriNetUnfolderBase]: For 694939/694939 co-relation queries the response was YES. [2024-06-21 17:43:40,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44916 conditions, 6265 events. 3935/6265 cut-off events. For 694939/694939 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 38242 event pairs, 1080 based on Foata normal form. 2/6266 useless extension candidates. Maximal degree in co-relation 44787. Up to 5933 conditions per place. [2024-06-21 17:43:40,625 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 326 selfloop transitions, 39 changer transitions 0/370 dead transitions. [2024-06-21 17:43:40,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 370 transitions, 4910 flow [2024-06-21 17:43:40,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:43:40,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:43:40,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-21 17:43:40,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4011627906976744 [2024-06-21 17:43:40,627 INFO L175 Difference]: Start difference. First operand has 266 places, 345 transitions, 4089 flow. Second operand 8 states and 138 transitions. [2024-06-21 17:43:40,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 370 transitions, 4910 flow [2024-06-21 17:43:41,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 370 transitions, 4678 flow, removed 51 selfloop flow, removed 5 redundant places. [2024-06-21 17:43:41,493 INFO L231 Difference]: Finished difference. Result has 270 places, 346 transitions, 3967 flow [2024-06-21 17:43:41,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3860, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3967, PETRI_PLACES=270, PETRI_TRANSITIONS=346} [2024-06-21 17:43:41,493 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 226 predicate places. [2024-06-21 17:43:41,493 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 346 transitions, 3967 flow [2024-06-21 17:43:41,494 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) [2024-06-21 17:43:41,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:43:41,494 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:43:41,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 17:43:41,494 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:43:41,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:43:41,494 INFO L85 PathProgramCache]: Analyzing trace with hash -1129596459, now seen corresponding path program 2 times [2024-06-21 17:43:41,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:43:41,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367480738] [2024-06-21 17:43:41,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:43:41,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:43:41,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:43:44,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:43:44,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:43:44,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367480738] [2024-06-21 17:43:44,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367480738] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:43:44,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:43:44,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:43:44,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906431721] [2024-06-21 17:43:44,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:43:44,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:43:44,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:43:44,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:43:44,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:43:44,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:43:44,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 346 transitions, 3967 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) [2024-06-21 17:43:44,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:43:44,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:43:44,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:43:46,858 INFO L124 PetriNetUnfolderBase]: 4012/6404 cut-off events. [2024-06-21 17:43:46,859 INFO L125 PetriNetUnfolderBase]: For 741335/741335 co-relation queries the response was YES. [2024-06-21 17:43:46,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46192 conditions, 6404 events. 4012/6404 cut-off events. For 741335/741335 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 39420 event pairs, 918 based on Foata normal form. 1/6403 useless extension candidates. Maximal degree in co-relation 46061. Up to 4713 conditions per place. [2024-06-21 17:43:46,934 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 224 selfloop transitions, 172 changer transitions 0/401 dead transitions. [2024-06-21 17:43:46,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 401 transitions, 5700 flow [2024-06-21 17:43:46,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:43:46,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:43:46,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-21 17:43:46,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4680232558139535 [2024-06-21 17:43:46,935 INFO L175 Difference]: Start difference. First operand has 270 places, 346 transitions, 3967 flow. Second operand 8 states and 161 transitions. [2024-06-21 17:43:46,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 401 transitions, 5700 flow [2024-06-21 17:43:48,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 401 transitions, 5611 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-21 17:43:48,097 INFO L231 Difference]: Finished difference. Result has 274 places, 360 transitions, 4484 flow [2024-06-21 17:43:48,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3878, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4484, PETRI_PLACES=274, PETRI_TRANSITIONS=360} [2024-06-21 17:43:48,098 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 230 predicate places. [2024-06-21 17:43:48,098 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 360 transitions, 4484 flow [2024-06-21 17:43:48,098 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) [2024-06-21 17:43:48,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:43:48,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:43:48,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-21 17:43:48,098 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)] === [2024-06-21 17:43:48,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:43:48,099 INFO L85 PathProgramCache]: Analyzing trace with hash -1352530695, now seen corresponding path program 3 times [2024-06-21 17:43:48,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:43:48,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159932625] [2024-06-21 17:43:48,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:43:48,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:43:48,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:43:51,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:43:51,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:43:51,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159932625] [2024-06-21 17:43:51,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159932625] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:43:51,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:43:51,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:43:51,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140390698] [2024-06-21 17:43:51,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:43:51,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:43:51,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:43:51,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:43:51,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:43:51,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:43:51,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 360 transitions, 4484 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) [2024-06-21 17:43:51,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:43:51,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:43:51,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:43:53,370 INFO L124 PetriNetUnfolderBase]: 4017/6413 cut-off events. [2024-06-21 17:43:53,371 INFO L125 PetriNetUnfolderBase]: For 765129/765129 co-relation queries the response was YES. [2024-06-21 17:43:53,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47948 conditions, 6413 events. 4017/6413 cut-off events. For 765129/765129 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 39452 event pairs, 918 based on Foata normal form. 1/6412 useless extension candidates. Maximal degree in co-relation 47815. Up to 4715 conditions per place. [2024-06-21 17:43:53,448 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 219 selfloop transitions, 175 changer transitions 0/399 dead transitions. [2024-06-21 17:43:53,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 399 transitions, 6058 flow [2024-06-21 17:43:53,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:43:53,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:43:53,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-21 17:43:53,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45058139534883723 [2024-06-21 17:43:53,450 INFO L175 Difference]: Start difference. First operand has 274 places, 360 transitions, 4484 flow. Second operand 8 states and 155 transitions. [2024-06-21 17:43:53,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 399 transitions, 6058 flow [2024-06-21 17:43:54,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 399 transitions, 5875 flow, removed 73 selfloop flow, removed 2 redundant places. [2024-06-21 17:43:54,557 INFO L231 Difference]: Finished difference. Result has 280 places, 363 transitions, 4738 flow [2024-06-21 17:43:54,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4327, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4738, PETRI_PLACES=280, PETRI_TRANSITIONS=363} [2024-06-21 17:43:54,557 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 236 predicate places. [2024-06-21 17:43:54,557 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 363 transitions, 4738 flow [2024-06-21 17:43:54,557 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) [2024-06-21 17:43:54,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:43:54,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:43:54,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-21 17:43:54,558 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)] === [2024-06-21 17:43:54,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:43:54,558 INFO L85 PathProgramCache]: Analyzing trace with hash -156420871, now seen corresponding path program 4 times [2024-06-21 17:43:54,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:43:54,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002177832] [2024-06-21 17:43:54,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:43:54,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:43:54,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:43:57,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:43:57,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:43:57,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002177832] [2024-06-21 17:43:57,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002177832] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:43:57,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:43:57,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:43:57,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47957028] [2024-06-21 17:43:57,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:43:57,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:43:57,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:43:57,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:43:57,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:43:57,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:43:57,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 363 transitions, 4738 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) [2024-06-21 17:43:57,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:43:57,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:43:57,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:43:59,723 INFO L124 PetriNetUnfolderBase]: 4038/6439 cut-off events. [2024-06-21 17:43:59,723 INFO L125 PetriNetUnfolderBase]: For 787042/787042 co-relation queries the response was YES. [2024-06-21 17:43:59,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48173 conditions, 6439 events. 4038/6439 cut-off events. For 787042/787042 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 39661 event pairs, 1092 based on Foata normal form. 1/6439 useless extension candidates. Maximal degree in co-relation 48037. Up to 6045 conditions per place. [2024-06-21 17:43:59,790 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 337 selfloop transitions, 53 changer transitions 0/395 dead transitions. [2024-06-21 17:43:59,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 395 transitions, 5883 flow [2024-06-21 17:43:59,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:43:59,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:43:59,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-21 17:43:59,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3979328165374677 [2024-06-21 17:43:59,791 INFO L175 Difference]: Start difference. First operand has 280 places, 363 transitions, 4738 flow. Second operand 9 states and 154 transitions. [2024-06-21 17:43:59,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 395 transitions, 5883 flow [2024-06-21 17:44:00,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 395 transitions, 5524 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-21 17:44:00,929 INFO L231 Difference]: Finished difference. Result has 285 places, 369 transitions, 4627 flow [2024-06-21 17:44:00,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4388, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4627, PETRI_PLACES=285, PETRI_TRANSITIONS=369} [2024-06-21 17:44:00,929 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 241 predicate places. [2024-06-21 17:44:00,930 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 369 transitions, 4627 flow [2024-06-21 17:44:00,930 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) [2024-06-21 17:44:00,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:44:00,930 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:44:00,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-21 17:44:00,930 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)] === [2024-06-21 17:44:00,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:44:00,930 INFO L85 PathProgramCache]: Analyzing trace with hash 594899413, now seen corresponding path program 5 times [2024-06-21 17:44:00,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:44:00,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416397523] [2024-06-21 17:44:00,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:44:00,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:44:00,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:44:03,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:44:03,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:44:03,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416397523] [2024-06-21 17:44:03,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416397523] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:44:03,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:44:03,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:44:03,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880655491] [2024-06-21 17:44:03,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:44:03,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:44:03,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:44:03,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:44:03,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:44:03,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:44:03,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 369 transitions, 4627 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) [2024-06-21 17:44:03,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:44:03,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:44:03,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:44:06,332 INFO L124 PetriNetUnfolderBase]: 4043/6418 cut-off events. [2024-06-21 17:44:06,332 INFO L125 PetriNetUnfolderBase]: For 802829/802829 co-relation queries the response was YES. [2024-06-21 17:44:06,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47836 conditions, 6418 events. 4043/6418 cut-off events. For 802829/802829 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 39322 event pairs, 1140 based on Foata normal form. 1/6404 useless extension candidates. Maximal degree in co-relation 47698. Up to 4728 conditions per place. [2024-06-21 17:44:06,406 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 242 selfloop transitions, 167 changer transitions 0/414 dead transitions. [2024-06-21 17:44:06,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 414 transitions, 6322 flow [2024-06-21 17:44:06,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:44:06,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:44:06,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-21 17:44:06,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44476744186046513 [2024-06-21 17:44:06,408 INFO L175 Difference]: Start difference. First operand has 285 places, 369 transitions, 4627 flow. Second operand 8 states and 153 transitions. [2024-06-21 17:44:06,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 414 transitions, 6322 flow [2024-06-21 17:44:07,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 414 transitions, 6179 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-21 17:44:07,686 INFO L231 Difference]: Finished difference. Result has 287 places, 379 transitions, 5070 flow [2024-06-21 17:44:07,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4484, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5070, PETRI_PLACES=287, PETRI_TRANSITIONS=379} [2024-06-21 17:44:07,686 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 243 predicate places. [2024-06-21 17:44:07,686 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 379 transitions, 5070 flow [2024-06-21 17:44:07,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:44:07,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:44:07,687 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:44:07,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-21 17:44:07,687 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)] === [2024-06-21 17:44:07,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:44:07,687 INFO L85 PathProgramCache]: Analyzing trace with hash 997192999, now seen corresponding path program 6 times [2024-06-21 17:44:07,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:44:07,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833811250] [2024-06-21 17:44:07,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:44:07,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:44:07,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:44:10,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:44:10,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:44:10,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833811250] [2024-06-21 17:44:10,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833811250] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:44:10,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:44:10,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:44:10,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446752998] [2024-06-21 17:44:10,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:44:10,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:44:10,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:44:10,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:44:10,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:44:10,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:44:10,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 379 transitions, 5070 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) [2024-06-21 17:44:10,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:44:10,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:44:10,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:44:12,852 INFO L124 PetriNetUnfolderBase]: 4048/6440 cut-off events. [2024-06-21 17:44:12,852 INFO L125 PetriNetUnfolderBase]: For 825360/825360 co-relation queries the response was YES. [2024-06-21 17:44:12,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48795 conditions, 6440 events. 4048/6440 cut-off events. For 825360/825360 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 39495 event pairs, 1139 based on Foata normal form. 1/6427 useless extension candidates. Maximal degree in co-relation 48656. Up to 4730 conditions per place. [2024-06-21 17:44:12,936 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 239 selfloop transitions, 172 changer transitions 0/416 dead transitions. [2024-06-21 17:44:12,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 416 transitions, 6668 flow [2024-06-21 17:44:12,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:44:12,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:44:12,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-21 17:44:12,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4108527131782946 [2024-06-21 17:44:12,938 INFO L175 Difference]: Start difference. First operand has 287 places, 379 transitions, 5070 flow. Second operand 9 states and 159 transitions. [2024-06-21 17:44:12,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 416 transitions, 6668 flow [2024-06-21 17:44:14,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 416 transitions, 6479 flow, removed 74 selfloop flow, removed 3 redundant places. [2024-06-21 17:44:14,528 INFO L231 Difference]: Finished difference. Result has 294 places, 384 transitions, 5355 flow [2024-06-21 17:44:14,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4911, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5355, PETRI_PLACES=294, PETRI_TRANSITIONS=384} [2024-06-21 17:44:14,529 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 250 predicate places. [2024-06-21 17:44:14,529 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 384 transitions, 5355 flow [2024-06-21 17:44:14,529 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) [2024-06-21 17:44:14,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:44:14,529 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:44:14,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-21 17:44:14,530 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)] === [2024-06-21 17:44:14,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:44:14,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1775974971, now seen corresponding path program 7 times [2024-06-21 17:44:14,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:44:14,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213000375] [2024-06-21 17:44:14,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:44:14,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:44:14,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:44:17,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:44:17,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:44:17,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213000375] [2024-06-21 17:44:17,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213000375] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:44:17,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:44:17,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:44:17,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883165150] [2024-06-21 17:44:17,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:44:17,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:44:17,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:44:17,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:44:17,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:44:17,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:44:17,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 384 transitions, 5355 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) [2024-06-21 17:44:17,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:44:17,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:44:17,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:44:19,677 INFO L124 PetriNetUnfolderBase]: 4079/6480 cut-off events. [2024-06-21 17:44:19,677 INFO L125 PetriNetUnfolderBase]: For 861646/861646 co-relation queries the response was YES. [2024-06-21 17:44:19,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50106 conditions, 6480 events. 4079/6480 cut-off events. For 861646/861646 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 39871 event pairs, 1144 based on Foata normal form. 3/6468 useless extension candidates. Maximal degree in co-relation 49964. Up to 4747 conditions per place. [2024-06-21 17:44:19,768 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 240 selfloop transitions, 173 changer transitions 0/418 dead transitions. [2024-06-21 17:44:19,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 418 transitions, 6942 flow [2024-06-21 17:44:19,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:44:19,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:44:19,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-21 17:44:19,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-21 17:44:19,770 INFO L175 Difference]: Start difference. First operand has 294 places, 384 transitions, 5355 flow. Second operand 8 states and 147 transitions. [2024-06-21 17:44:19,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 418 transitions, 6942 flow [2024-06-21 17:44:21,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 418 transitions, 6702 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-21 17:44:21,094 INFO L231 Difference]: Finished difference. Result has 298 places, 391 transitions, 5618 flow [2024-06-21 17:44:21,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5123, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5618, PETRI_PLACES=298, PETRI_TRANSITIONS=391} [2024-06-21 17:44:21,095 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 254 predicate places. [2024-06-21 17:44:21,095 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 391 transitions, 5618 flow [2024-06-21 17:44:21,095 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) [2024-06-21 17:44:21,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:44:21,095 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:44:21,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-21 17:44:21,096 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)] === [2024-06-21 17:44:21,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:44:21,096 INFO L85 PathProgramCache]: Analyzing trace with hash 864916023, now seen corresponding path program 8 times [2024-06-21 17:44:21,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:44:21,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204203582] [2024-06-21 17:44:21,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:44:21,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:44:21,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:44:24,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:44:24,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:44:24,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204203582] [2024-06-21 17:44:24,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204203582] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:44:24,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:44:24,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:44:24,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226259488] [2024-06-21 17:44:24,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:44:24,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:44:24,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:44:24,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:44:24,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:44:24,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:44:24,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 391 transitions, 5618 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) [2024-06-21 17:44:24,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:44:24,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:44:24,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:44:26,212 INFO L124 PetriNetUnfolderBase]: 4150/6595 cut-off events. [2024-06-21 17:44:26,213 INFO L125 PetriNetUnfolderBase]: For 912464/912464 co-relation queries the response was YES. [2024-06-21 17:44:26,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51708 conditions, 6595 events. 4150/6595 cut-off events. For 912464/912464 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 40671 event pairs, 1048 based on Foata normal form. 3/6590 useless extension candidates. Maximal degree in co-relation 51564. Up to 5732 conditions per place. [2024-06-21 17:44:26,297 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 318 selfloop transitions, 97 changer transitions 0/420 dead transitions. [2024-06-21 17:44:26,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 420 transitions, 6988 flow [2024-06-21 17:44:26,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:44:26,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:44:26,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-21 17:44:26,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-21 17:44:26,298 INFO L175 Difference]: Start difference. First operand has 298 places, 391 transitions, 5618 flow. Second operand 9 states and 153 transitions. [2024-06-21 17:44:26,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 420 transitions, 6988 flow [2024-06-21 17:44:27,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 420 transitions, 6643 flow, removed 44 selfloop flow, removed 4 redundant places. [2024-06-21 17:44:27,885 INFO L231 Difference]: Finished difference. Result has 304 places, 397 transitions, 5631 flow [2024-06-21 17:44:27,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5285, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5631, PETRI_PLACES=304, PETRI_TRANSITIONS=397} [2024-06-21 17:44:27,886 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 260 predicate places. [2024-06-21 17:44:27,886 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 397 transitions, 5631 flow [2024-06-21 17:44:27,886 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) [2024-06-21 17:44:27,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:44:27,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:44:27,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-21 17:44:27,887 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)] === [2024-06-21 17:44:27,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:44:27,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1835860131, now seen corresponding path program 9 times [2024-06-21 17:44:27,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:44:27,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534093589] [2024-06-21 17:44:27,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:44:27,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:44:27,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:44:30,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:44:30,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:44:30,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534093589] [2024-06-21 17:44:30,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534093589] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:44:30,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:44:30,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:44:30,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772317352] [2024-06-21 17:44:30,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:44:30,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:44:30,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:44:30,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:44:30,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:44:30,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:44:30,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 397 transitions, 5631 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) [2024-06-21 17:44:30,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:44:30,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:44:30,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:44:33,354 INFO L124 PetriNetUnfolderBase]: 4141/6585 cut-off events. [2024-06-21 17:44:33,355 INFO L125 PetriNetUnfolderBase]: For 917861/917861 co-relation queries the response was YES. [2024-06-21 17:44:33,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51177 conditions, 6585 events. 4141/6585 cut-off events. For 917861/917861 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 40582 event pairs, 1041 based on Foata normal form. 3/6580 useless extension candidates. Maximal degree in co-relation 51031. Up to 5728 conditions per place. [2024-06-21 17:44:33,445 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 318 selfloop transitions, 100 changer transitions 0/423 dead transitions. [2024-06-21 17:44:33,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 423 transitions, 6915 flow [2024-06-21 17:44:33,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:44:33,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:44:33,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 171 transitions. [2024-06-21 17:44:33,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39767441860465114 [2024-06-21 17:44:33,446 INFO L175 Difference]: Start difference. First operand has 304 places, 397 transitions, 5631 flow. Second operand 10 states and 171 transitions. [2024-06-21 17:44:33,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 423 transitions, 6915 flow [2024-06-21 17:44:34,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 423 transitions, 6638 flow, removed 30 selfloop flow, removed 8 redundant places. [2024-06-21 17:44:34,960 INFO L231 Difference]: Finished difference. Result has 307 places, 398 transitions, 5611 flow [2024-06-21 17:44:34,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5354, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5611, PETRI_PLACES=307, PETRI_TRANSITIONS=398} [2024-06-21 17:44:34,961 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 263 predicate places. [2024-06-21 17:44:34,961 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 398 transitions, 5611 flow [2024-06-21 17:44:34,961 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) [2024-06-21 17:44:34,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:44:34,961 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:44:34,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-21 17:44:34,961 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)] === [2024-06-21 17:44:34,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:44:34,962 INFO L85 PathProgramCache]: Analyzing trace with hash 258770900, now seen corresponding path program 1 times [2024-06-21 17:44:34,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:44:34,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354158047] [2024-06-21 17:44:34,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:44:34,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:44:34,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:44:38,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:44:38,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:44:38,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354158047] [2024-06-21 17:44:38,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354158047] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:44:38,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:44:38,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:44:38,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999315417] [2024-06-21 17:44:38,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:44:38,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:44:38,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:44:38,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:44:38,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:44:38,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:44:38,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 398 transitions, 5611 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:44:38,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:44:38,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:44:38,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:44:40,759 INFO L124 PetriNetUnfolderBase]: 4450/7103 cut-off events. [2024-06-21 17:44:40,760 INFO L125 PetriNetUnfolderBase]: For 1172224/1172232 co-relation queries the response was YES. [2024-06-21 17:44:40,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57888 conditions, 7103 events. 4450/7103 cut-off events. For 1172224/1172232 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 44597 event pairs, 1159 based on Foata normal form. 24/7123 useless extension candidates. Maximal degree in co-relation 57740. Up to 5247 conditions per place. [2024-06-21 17:44:40,849 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 330 selfloop transitions, 112 changer transitions 0/447 dead transitions. [2024-06-21 17:44:40,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 447 transitions, 7177 flow [2024-06-21 17:44:40,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:44:40,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:44:40,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-21 17:44:40,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4476744186046512 [2024-06-21 17:44:40,850 INFO L175 Difference]: Start difference. First operand has 307 places, 398 transitions, 5611 flow. Second operand 8 states and 154 transitions. [2024-06-21 17:44:40,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 447 transitions, 7177 flow [2024-06-21 17:44:43,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 447 transitions, 6987 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-21 17:44:43,051 INFO L231 Difference]: Finished difference. Result has 309 places, 404 transitions, 5819 flow [2024-06-21 17:44:43,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5421, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5819, PETRI_PLACES=309, PETRI_TRANSITIONS=404} [2024-06-21 17:44:43,052 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 265 predicate places. [2024-06-21 17:44:43,052 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 404 transitions, 5819 flow [2024-06-21 17:44:43,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:44:43,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:44:43,052 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:44:43,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-21 17:44:43,053 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)] === [2024-06-21 17:44:43,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:44:43,053 INFO L85 PathProgramCache]: Analyzing trace with hash -1625988260, now seen corresponding path program 2 times [2024-06-21 17:44:43,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:44:43,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577940218] [2024-06-21 17:44:43,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:44:43,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:44:43,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:44:46,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:44:46,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:44:46,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577940218] [2024-06-21 17:44:46,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577940218] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:44:46,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:44:46,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:44:46,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124232399] [2024-06-21 17:44:46,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:44:46,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:44:46,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:44:46,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:44:46,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:44:46,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:44:46,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 404 transitions, 5819 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:44:46,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:44:46,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:44:46,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:44:48,852 INFO L124 PetriNetUnfolderBase]: 4538/7237 cut-off events. [2024-06-21 17:44:48,852 INFO L125 PetriNetUnfolderBase]: For 1242615/1242623 co-relation queries the response was YES. [2024-06-21 17:44:48,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59669 conditions, 7237 events. 4538/7237 cut-off events. For 1242615/1242623 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 45628 event pairs, 1266 based on Foata normal form. 32/7265 useless extension candidates. Maximal degree in co-relation 59518. Up to 6111 conditions per place. [2024-06-21 17:44:48,941 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 320 selfloop transitions, 111 changer transitions 0/436 dead transitions. [2024-06-21 17:44:48,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 436 transitions, 6824 flow [2024-06-21 17:44:48,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:44:48,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:44:48,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-21 17:44:48,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42441860465116277 [2024-06-21 17:44:48,943 INFO L175 Difference]: Start difference. First operand has 309 places, 404 transitions, 5819 flow. Second operand 8 states and 146 transitions. [2024-06-21 17:44:48,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 436 transitions, 6824 flow [2024-06-21 17:44:50,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 436 transitions, 6667 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-06-21 17:44:50,936 INFO L231 Difference]: Finished difference. Result has 314 places, 406 transitions, 5943 flow [2024-06-21 17:44:50,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5662, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5943, PETRI_PLACES=314, PETRI_TRANSITIONS=406} [2024-06-21 17:44:50,936 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 270 predicate places. [2024-06-21 17:44:50,936 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 406 transitions, 5943 flow [2024-06-21 17:44:50,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:44:50,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:44:50,937 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:44:50,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-21 17:44:50,937 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)] === [2024-06-21 17:44:50,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:44:50,937 INFO L85 PathProgramCache]: Analyzing trace with hash -1542875090, now seen corresponding path program 3 times [2024-06-21 17:44:50,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:44:50,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290368469] [2024-06-21 17:44:50,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:44:50,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:44:50,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:44:54,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:44:54,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:44:54,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290368469] [2024-06-21 17:44:54,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290368469] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:44:54,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:44:54,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:44:54,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980789911] [2024-06-21 17:44:54,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:44:54,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:44:54,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:44:54,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:44:54,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:44:54,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:44:54,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 406 transitions, 5943 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:44:54,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:44:54,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:44:54,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:44:56,948 INFO L124 PetriNetUnfolderBase]: 4689/7464 cut-off events. [2024-06-21 17:44:56,949 INFO L125 PetriNetUnfolderBase]: For 1298960/1298968 co-relation queries the response was YES. [2024-06-21 17:44:57,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63043 conditions, 7464 events. 4689/7464 cut-off events. For 1298960/1298968 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 47182 event pairs, 1271 based on Foata normal form. 24/7484 useless extension candidates. Maximal degree in co-relation 62890. Up to 6125 conditions per place. [2024-06-21 17:44:57,058 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 328 selfloop transitions, 110 changer transitions 0/443 dead transitions. [2024-06-21 17:44:57,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 443 transitions, 7205 flow [2024-06-21 17:44:57,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:44:57,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:44:57,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-21 17:44:57,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-21 17:44:57,059 INFO L175 Difference]: Start difference. First operand has 314 places, 406 transitions, 5943 flow. Second operand 8 states and 148 transitions. [2024-06-21 17:44:57,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 443 transitions, 7205 flow [2024-06-21 17:44:59,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 443 transitions, 7014 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-21 17:44:59,909 INFO L231 Difference]: Finished difference. Result has 318 places, 410 transitions, 6086 flow [2024-06-21 17:44:59,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5752, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6086, PETRI_PLACES=318, PETRI_TRANSITIONS=410} [2024-06-21 17:44:59,909 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 274 predicate places. [2024-06-21 17:44:59,909 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 410 transitions, 6086 flow [2024-06-21 17:44:59,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:44:59,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:44:59,909 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:44:59,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-21 17:44:59,910 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)] === [2024-06-21 17:44:59,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:44:59,910 INFO L85 PathProgramCache]: Analyzing trace with hash 166095392, now seen corresponding path program 4 times [2024-06-21 17:44:59,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:44:59,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994057143] [2024-06-21 17:44:59,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:44:59,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:44:59,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:45:03,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:45:03,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:45:03,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994057143] [2024-06-21 17:45:03,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994057143] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:45:03,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:45:03,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:45:03,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562816512] [2024-06-21 17:45:03,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:45:03,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:45:03,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:45:03,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:45:03,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:45:04,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:45:04,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 410 transitions, 6086 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:45:04,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:45:04,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:45:04,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:45:07,450 INFO L124 PetriNetUnfolderBase]: 4777/7594 cut-off events. [2024-06-21 17:45:07,450 INFO L125 PetriNetUnfolderBase]: For 1367076/1367076 co-relation queries the response was YES. [2024-06-21 17:45:07,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64213 conditions, 7594 events. 4777/7594 cut-off events. For 1367076/1367076 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 48109 event pairs, 1361 based on Foata normal form. 24/7609 useless extension candidates. Maximal degree in co-relation 64058. Up to 6480 conditions per place. [2024-06-21 17:45:07,552 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 321 selfloop transitions, 123 changer transitions 0/449 dead transitions. [2024-06-21 17:45:07,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 449 transitions, 7139 flow [2024-06-21 17:45:07,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:45:07,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:45:07,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 190 transitions. [2024-06-21 17:45:07,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40169133192389006 [2024-06-21 17:45:07,554 INFO L175 Difference]: Start difference. First operand has 318 places, 410 transitions, 6086 flow. Second operand 11 states and 190 transitions. [2024-06-21 17:45:07,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 449 transitions, 7139 flow [2024-06-21 17:45:10,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 449 transitions, 6962 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-21 17:45:10,562 INFO L231 Difference]: Finished difference. Result has 325 places, 412 transitions, 6222 flow [2024-06-21 17:45:10,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5909, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6222, PETRI_PLACES=325, PETRI_TRANSITIONS=412} [2024-06-21 17:45:10,563 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 281 predicate places. [2024-06-21 17:45:10,563 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 412 transitions, 6222 flow [2024-06-21 17:45:10,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:45:10,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:45:10,563 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:45:10,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-21 17:45:10,563 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)] === [2024-06-21 17:45:10,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:45:10,564 INFO L85 PathProgramCache]: Analyzing trace with hash -367878914, now seen corresponding path program 1 times [2024-06-21 17:45:10,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:45:10,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996536263] [2024-06-21 17:45:10,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:45:10,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:45:10,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:45:14,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:45:14,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:45:14,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996536263] [2024-06-21 17:45:14,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996536263] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:45:14,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:45:14,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:45:14,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208679757] [2024-06-21 17:45:14,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:45:14,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:45:14,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:45:14,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:45:14,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:45:14,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:45:14,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 412 transitions, 6222 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:45:14,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:45:14,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:45:14,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:45:17,416 INFO L124 PetriNetUnfolderBase]: 4905/7794 cut-off events. [2024-06-21 17:45:17,416 INFO L125 PetriNetUnfolderBase]: For 1412576/1412576 co-relation queries the response was YES. [2024-06-21 17:45:17,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67199 conditions, 7794 events. 4905/7794 cut-off events. For 1412576/1412576 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 49472 event pairs, 1383 based on Foata normal form. 16/7801 useless extension candidates. Maximal degree in co-relation 67042. Up to 6440 conditions per place. [2024-06-21 17:45:17,526 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 321 selfloop transitions, 130 changer transitions 0/456 dead transitions. [2024-06-21 17:45:17,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 456 transitions, 7549 flow [2024-06-21 17:45:17,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:45:17,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:45:17,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 192 transitions. [2024-06-21 17:45:17,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4059196617336152 [2024-06-21 17:45:17,527 INFO L175 Difference]: Start difference. First operand has 325 places, 412 transitions, 6222 flow. Second operand 11 states and 192 transitions. [2024-06-21 17:45:17,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 456 transitions, 7549 flow [2024-06-21 17:45:21,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 456 transitions, 7261 flow, removed 23 selfloop flow, removed 9 redundant places. [2024-06-21 17:45:21,072 INFO L231 Difference]: Finished difference. Result has 328 places, 416 transitions, 6332 flow [2024-06-21 17:45:21,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5934, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6332, PETRI_PLACES=328, PETRI_TRANSITIONS=416} [2024-06-21 17:45:21,072 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 284 predicate places. [2024-06-21 17:45:21,073 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 416 transitions, 6332 flow [2024-06-21 17:45:21,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:45:21,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:45:21,073 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:45:21,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-21 17:45:21,073 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)] === [2024-06-21 17:45:21,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:45:21,074 INFO L85 PathProgramCache]: Analyzing trace with hash -373600646, now seen corresponding path program 5 times [2024-06-21 17:45:21,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:45:21,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082396116] [2024-06-21 17:45:21,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:45:21,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:45:21,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:45:24,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:45:24,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:45:24,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082396116] [2024-06-21 17:45:24,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082396116] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:45:24,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:45:24,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:45:24,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582445727] [2024-06-21 17:45:24,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:45:24,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:45:24,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:45:24,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:45:24,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:45:24,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:45:24,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 416 transitions, 6332 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:45:24,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:45:24,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:45:24,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:45:27,781 INFO L124 PetriNetUnfolderBase]: 4849/7714 cut-off events. [2024-06-21 17:45:27,781 INFO L125 PetriNetUnfolderBase]: For 1361677/1361677 co-relation queries the response was YES. [2024-06-21 17:45:27,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64423 conditions, 7714 events. 4849/7714 cut-off events. For 1361677/1361677 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 48993 event pairs, 1387 based on Foata normal form. 24/7729 useless extension candidates. Maximal degree in co-relation 64264. Up to 6596 conditions per place. [2024-06-21 17:45:27,896 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 326 selfloop transitions, 117 changer transitions 0/448 dead transitions. [2024-06-21 17:45:27,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 448 transitions, 7316 flow [2024-06-21 17:45:27,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:45:27,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:45:27,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-21 17:45:27,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4160206718346253 [2024-06-21 17:45:27,899 INFO L175 Difference]: Start difference. First operand has 328 places, 416 transitions, 6332 flow. Second operand 9 states and 161 transitions. [2024-06-21 17:45:27,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 448 transitions, 7316 flow [2024-06-21 17:45:30,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 448 transitions, 7061 flow, removed 46 selfloop flow, removed 7 redundant places. [2024-06-21 17:45:30,991 INFO L231 Difference]: Finished difference. Result has 330 places, 416 transitions, 6317 flow [2024-06-21 17:45:30,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6077, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6317, PETRI_PLACES=330, PETRI_TRANSITIONS=416} [2024-06-21 17:45:30,991 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 286 predicate places. [2024-06-21 17:45:30,991 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 416 transitions, 6317 flow [2024-06-21 17:45:30,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:45:30,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:45:30,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:45:30,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-21 17:45:30,992 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)] === [2024-06-21 17:45:30,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:45:30,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1784563800, now seen corresponding path program 6 times [2024-06-21 17:45:30,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:45:30,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183914445] [2024-06-21 17:45:30,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:45:30,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:45:31,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:45:34,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:45:34,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:45:34,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183914445] [2024-06-21 17:45:34,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183914445] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:45:34,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:45:34,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:45:34,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070536353] [2024-06-21 17:45:34,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:45:34,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:45:34,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:45:34,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:45:34,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:45:34,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:45:34,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 416 transitions, 6317 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:45:34,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:45:34,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:45:34,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:45:37,432 INFO L124 PetriNetUnfolderBase]: 5000/7947 cut-off events. [2024-06-21 17:45:37,432 INFO L125 PetriNetUnfolderBase]: For 1418398/1418398 co-relation queries the response was YES. [2024-06-21 17:45:37,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67187 conditions, 7947 events. 5000/7947 cut-off events. For 1418398/1418398 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 50720 event pairs, 1402 based on Foata normal form. 16/7954 useless extension candidates. Maximal degree in co-relation 67026. Up to 6472 conditions per place. [2024-06-21 17:45:37,536 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 334 selfloop transitions, 116 changer transitions 0/455 dead transitions. [2024-06-21 17:45:37,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 455 transitions, 7633 flow [2024-06-21 17:45:37,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:45:37,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:45:37,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-21 17:45:37,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42118863049095606 [2024-06-21 17:45:37,537 INFO L175 Difference]: Start difference. First operand has 330 places, 416 transitions, 6317 flow. Second operand 9 states and 163 transitions. [2024-06-21 17:45:37,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 455 transitions, 7633 flow [2024-06-21 17:45:40,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 455 transitions, 7392 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-21 17:45:40,235 INFO L231 Difference]: Finished difference. Result has 333 places, 420 transitions, 6445 flow [2024-06-21 17:45:40,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6076, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6445, PETRI_PLACES=333, PETRI_TRANSITIONS=420} [2024-06-21 17:45:40,236 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 289 predicate places. [2024-06-21 17:45:40,236 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 420 transitions, 6445 flow [2024-06-21 17:45:40,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:45:40,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:45:40,236 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:45:40,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-21 17:45:40,236 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)] === [2024-06-21 17:45:40,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:45:40,237 INFO L85 PathProgramCache]: Analyzing trace with hash 879015102, now seen corresponding path program 7 times [2024-06-21 17:45:40,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:45:40,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140093719] [2024-06-21 17:45:40,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:45:40,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:45:40,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:45:43,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:45:43,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:45:43,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140093719] [2024-06-21 17:45:43,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140093719] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:45:43,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:45:43,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:45:43,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474232504] [2024-06-21 17:45:43,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:45:43,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:45:43,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:45:43,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:45:43,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:45:43,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:45:43,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 420 transitions, 6445 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:45:43,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:45:43,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:45:43,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:45:46,567 INFO L124 PetriNetUnfolderBase]: 5228/8270 cut-off events. [2024-06-21 17:45:46,568 INFO L125 PetriNetUnfolderBase]: For 1707321/1707321 co-relation queries the response was YES. [2024-06-21 17:45:46,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69196 conditions, 8270 events. 5228/8270 cut-off events. For 1707321/1707321 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 52723 event pairs, 1364 based on Foata normal form. 68/8330 useless extension candidates. Maximal degree in co-relation 69033. Up to 7249 conditions per place. [2024-06-21 17:45:46,682 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 345 selfloop transitions, 96 changer transitions 7/453 dead transitions. [2024-06-21 17:45:46,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 453 transitions, 7486 flow [2024-06-21 17:45:46,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:45:46,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:45:46,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-21 17:45:46,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-06-21 17:45:46,683 INFO L175 Difference]: Start difference. First operand has 333 places, 420 transitions, 6445 flow. Second operand 10 states and 175 transitions. [2024-06-21 17:45:46,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 453 transitions, 7486 flow [2024-06-21 17:45:49,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 453 transitions, 7285 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-21 17:45:49,648 INFO L231 Difference]: Finished difference. Result has 338 places, 417 transitions, 6409 flow [2024-06-21 17:45:49,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6244, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6409, PETRI_PLACES=338, PETRI_TRANSITIONS=417} [2024-06-21 17:45:49,649 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 294 predicate places. [2024-06-21 17:45:49,649 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 417 transitions, 6409 flow [2024-06-21 17:45:49,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:45:49,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:45:49,649 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:45:49,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-21 17:45:49,649 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)] === [2024-06-21 17:45:49,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:45:49,649 INFO L85 PathProgramCache]: Analyzing trace with hash -1602001972, now seen corresponding path program 2 times [2024-06-21 17:45:49,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:45:49,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490097944] [2024-06-21 17:45:49,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:45:49,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:45:49,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:45:52,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:45:52,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:45:52,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490097944] [2024-06-21 17:45:52,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490097944] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:45:52,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:45:52,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:45:52,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861592319] [2024-06-21 17:45:52,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:45:52,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:45:52,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:45:52,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:45:52,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:45:52,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:45:52,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 417 transitions, 6409 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:45:52,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:45:52,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:45:52,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:45:55,695 INFO L124 PetriNetUnfolderBase]: 5148/8164 cut-off events. [2024-06-21 17:45:55,695 INFO L125 PetriNetUnfolderBase]: For 1592744/1592744 co-relation queries the response was YES. [2024-06-21 17:45:55,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67080 conditions, 8164 events. 5148/8164 cut-off events. For 1592744/1592744 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 51951 event pairs, 1210 based on Foata normal form. 56/8212 useless extension candidates. Maximal degree in co-relation 66915. Up to 6283 conditions per place. [2024-06-21 17:45:55,804 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 338 selfloop transitions, 97 changer transitions 17/457 dead transitions. [2024-06-21 17:45:55,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 457 transitions, 7695 flow [2024-06-21 17:45:55,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:45:55,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:45:55,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-21 17:45:55,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42093023255813955 [2024-06-21 17:45:55,805 INFO L175 Difference]: Start difference. First operand has 338 places, 417 transitions, 6409 flow. Second operand 10 states and 181 transitions. [2024-06-21 17:45:55,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 457 transitions, 7695 flow [2024-06-21 17:45:58,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 457 transitions, 7477 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-21 17:45:58,351 INFO L231 Difference]: Finished difference. Result has 340 places, 406 transitions, 6244 flow [2024-06-21 17:45:58,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6191, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6244, PETRI_PLACES=340, PETRI_TRANSITIONS=406} [2024-06-21 17:45:58,351 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 296 predicate places. [2024-06-21 17:45:58,351 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 406 transitions, 6244 flow [2024-06-21 17:45:58,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:45:58,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:45:58,351 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:45:58,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-21 17:45:58,352 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)] === [2024-06-21 17:45:58,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:45:58,352 INFO L85 PathProgramCache]: Analyzing trace with hash -339075170, now seen corresponding path program 3 times [2024-06-21 17:45:58,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:45:58,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136463627] [2024-06-21 17:45:58,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:45:58,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:45:58,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:46:01,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:46:01,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:46:01,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136463627] [2024-06-21 17:46:01,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136463627] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:46:01,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:46:01,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:46:01,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975959175] [2024-06-21 17:46:01,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:46:01,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:46:01,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:46:01,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:46:01,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:46:01,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:46:01,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 406 transitions, 6244 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:46:01,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:46:01,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:46:01,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:46:04,505 INFO L124 PetriNetUnfolderBase]: 4696/7470 cut-off events. [2024-06-21 17:46:04,506 INFO L125 PetriNetUnfolderBase]: For 1333235/1333235 co-relation queries the response was YES. [2024-06-21 17:46:04,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57539 conditions, 7470 events. 4696/7470 cut-off events. For 1333235/1333235 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 47333 event pairs, 1130 based on Foata normal form. 68/7530 useless extension candidates. Maximal degree in co-relation 57373. Up to 6483 conditions per place. [2024-06-21 17:46:04,614 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 343 selfloop transitions, 81 changer transitions 7/436 dead transitions. [2024-06-21 17:46:04,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 436 transitions, 7202 flow [2024-06-21 17:46:04,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:46:04,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:46:04,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 172 transitions. [2024-06-21 17:46:04,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 17:46:04,615 INFO L175 Difference]: Start difference. First operand has 340 places, 406 transitions, 6244 flow. Second operand 10 states and 172 transitions. [2024-06-21 17:46:04,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 436 transitions, 7202 flow [2024-06-21 17:46:07,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 436 transitions, 6816 flow, removed 41 selfloop flow, removed 11 redundant places. [2024-06-21 17:46:07,287 INFO L231 Difference]: Finished difference. Result has 339 places, 401 transitions, 5946 flow [2024-06-21 17:46:07,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5858, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5946, PETRI_PLACES=339, PETRI_TRANSITIONS=401} [2024-06-21 17:46:07,287 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 295 predicate places. [2024-06-21 17:46:07,287 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 401 transitions, 5946 flow [2024-06-21 17:46:07,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:46:07,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:46:07,287 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:46:07,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-21 17:46:07,288 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)] === [2024-06-21 17:46:07,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:46:07,288 INFO L85 PathProgramCache]: Analyzing trace with hash -339228992, now seen corresponding path program 8 times [2024-06-21 17:46:07,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:46:07,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426682050] [2024-06-21 17:46:07,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:46:07,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:46:07,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:46:10,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:46:10,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:46:10,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426682050] [2024-06-21 17:46:10,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426682050] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:46:10,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:46:10,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:46:10,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653613856] [2024-06-21 17:46:10,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:46:10,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:46:10,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:46:10,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:46:10,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:46:10,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:46:10,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 401 transitions, 5946 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:46:10,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:46:10,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:46:10,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:46:12,939 INFO L124 PetriNetUnfolderBase]: 5005/7981 cut-off events. [2024-06-21 17:46:12,939 INFO L125 PetriNetUnfolderBase]: For 1532644/1532644 co-relation queries the response was YES. [2024-06-21 17:46:13,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63422 conditions, 7981 events. 5005/7981 cut-off events. For 1532644/1532644 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 50842 event pairs, 1189 based on Foata normal form. 56/8029 useless extension candidates. Maximal degree in co-relation 63257. Up to 6148 conditions per place. [2024-06-21 17:46:13,055 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 359 selfloop transitions, 74 changer transitions 0/438 dead transitions. [2024-06-21 17:46:13,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 438 transitions, 7193 flow [2024-06-21 17:46:13,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:46:13,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:46:13,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-21 17:46:13,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42118863049095606 [2024-06-21 17:46:13,056 INFO L175 Difference]: Start difference. First operand has 339 places, 401 transitions, 5946 flow. Second operand 9 states and 163 transitions. [2024-06-21 17:46:13,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 438 transitions, 7193 flow [2024-06-21 17:46:15,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 438 transitions, 6717 flow, removed 9 selfloop flow, removed 14 redundant places. [2024-06-21 17:46:15,842 INFO L231 Difference]: Finished difference. Result has 335 places, 403 transitions, 5696 flow [2024-06-21 17:46:15,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5470, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5696, PETRI_PLACES=335, PETRI_TRANSITIONS=403} [2024-06-21 17:46:15,842 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 291 predicate places. [2024-06-21 17:46:15,843 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 403 transitions, 5696 flow [2024-06-21 17:46:15,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:46:15,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:46:15,843 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:46:15,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-21 17:46:15,843 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)] === [2024-06-21 17:46:15,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:46:15,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1318730135, now seen corresponding path program 1 times [2024-06-21 17:46:15,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:46:15,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726338858] [2024-06-21 17:46:15,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:46:15,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:46:15,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:46:19,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:46:19,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:46:19,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726338858] [2024-06-21 17:46:19,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726338858] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:46:19,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:46:19,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:46:19,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011563435] [2024-06-21 17:46:19,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:46:19,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:46:19,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:46:19,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:46:19,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:46:19,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:46:19,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 403 transitions, 5696 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) [2024-06-21 17:46:19,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:46:19,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:46:19,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:46:22,097 INFO L124 PetriNetUnfolderBase]: 4987/7977 cut-off events. [2024-06-21 17:46:22,098 INFO L125 PetriNetUnfolderBase]: For 1255504/1255504 co-relation queries the response was YES. [2024-06-21 17:46:22,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62445 conditions, 7977 events. 4987/7977 cut-off events. For 1255504/1255504 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 50892 event pairs, 1306 based on Foata normal form. 8/7977 useless extension candidates. Maximal degree in co-relation 62279. Up to 7284 conditions per place. [2024-06-21 17:46:22,197 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 390 selfloop transitions, 37 changer transitions 0/432 dead transitions. [2024-06-21 17:46:22,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 432 transitions, 6880 flow [2024-06-21 17:46:22,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:46:22,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:46:22,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-21 17:46:22,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-21 17:46:22,198 INFO L175 Difference]: Start difference. First operand has 335 places, 403 transitions, 5696 flow. Second operand 7 states and 126 transitions. [2024-06-21 17:46:22,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 432 transitions, 6880 flow [2024-06-21 17:46:24,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 432 transitions, 6444 flow, removed 36 selfloop flow, removed 10 redundant places. [2024-06-21 17:46:24,969 INFO L231 Difference]: Finished difference. Result has 332 places, 403 transitions, 5338 flow [2024-06-21 17:46:24,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5260, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5338, PETRI_PLACES=332, PETRI_TRANSITIONS=403} [2024-06-21 17:46:24,970 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 288 predicate places. [2024-06-21 17:46:24,970 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 403 transitions, 5338 flow [2024-06-21 17:46:24,970 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) [2024-06-21 17:46:24,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:46:24,970 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:46:24,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-21 17:46:24,970 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)] === [2024-06-21 17:46:24,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:46:24,971 INFO L85 PathProgramCache]: Analyzing trace with hash -692786059, now seen corresponding path program 2 times [2024-06-21 17:46:24,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:46:24,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555617798] [2024-06-21 17:46:24,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:46:24,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:46:24,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:46:28,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:46:28,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:46:28,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555617798] [2024-06-21 17:46:28,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555617798] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:46:28,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:46:28,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:46:28,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232032961] [2024-06-21 17:46:28,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:46:28,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:46:28,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:46:28,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:46:28,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:46:28,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:46:28,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 403 transitions, 5338 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) [2024-06-21 17:46:28,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:46:28,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:46:28,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:46:31,020 INFO L124 PetriNetUnfolderBase]: 4969/7951 cut-off events. [2024-06-21 17:46:31,021 INFO L125 PetriNetUnfolderBase]: For 1227013/1227013 co-relation queries the response was YES. [2024-06-21 17:46:31,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59167 conditions, 7951 events. 4969/7951 cut-off events. For 1227013/1227013 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 50816 event pairs, 1419 based on Foata normal form. 8/7951 useless extension candidates. Maximal degree in co-relation 59003. Up to 7388 conditions per place. [2024-06-21 17:46:31,133 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 383 selfloop transitions, 38 changer transitions 0/426 dead transitions. [2024-06-21 17:46:31,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 426 transitions, 6284 flow [2024-06-21 17:46:31,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:46:31,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:46:31,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-21 17:46:31,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4053156146179402 [2024-06-21 17:46:31,134 INFO L175 Difference]: Start difference. First operand has 332 places, 403 transitions, 5338 flow. Second operand 7 states and 122 transitions. [2024-06-21 17:46:31,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 426 transitions, 6284 flow [2024-06-21 17:46:34,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 426 transitions, 6167 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-21 17:46:34,021 INFO L231 Difference]: Finished difference. Result has 333 places, 403 transitions, 5303 flow [2024-06-21 17:46:34,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5221, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5303, PETRI_PLACES=333, PETRI_TRANSITIONS=403} [2024-06-21 17:46:34,022 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 289 predicate places. [2024-06-21 17:46:34,022 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 403 transitions, 5303 flow [2024-06-21 17:46:34,022 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) [2024-06-21 17:46:34,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:46:34,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:46:34,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-21 17:46:34,022 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)] === [2024-06-21 17:46:34,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:46:34,022 INFO L85 PathProgramCache]: Analyzing trace with hash -810509235, now seen corresponding path program 1 times [2024-06-21 17:46:34,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:46:34,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103346083] [2024-06-21 17:46:34,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:46:34,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:46:34,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:46:36,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:46:36,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:46:36,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103346083] [2024-06-21 17:46:36,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103346083] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:46:36,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:46:36,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:46:36,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513371502] [2024-06-21 17:46:36,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:46:36,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:46:36,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:46:36,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:46:36,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:46:36,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:46:36,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 403 transitions, 5303 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) [2024-06-21 17:46:36,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:46:36,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:46:36,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:46:39,631 INFO L124 PetriNetUnfolderBase]: 4979/7989 cut-off events. [2024-06-21 17:46:39,632 INFO L125 PetriNetUnfolderBase]: For 1217094/1217094 co-relation queries the response was YES. [2024-06-21 17:46:39,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59127 conditions, 7989 events. 4979/7989 cut-off events. For 1217094/1217094 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 51536 event pairs, 1472 based on Foata normal form. 2/7990 useless extension candidates. Maximal degree in co-relation 58963. Up to 7464 conditions per place. [2024-06-21 17:46:39,748 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 387 selfloop transitions, 59 changer transitions 0/451 dead transitions. [2024-06-21 17:46:39,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 451 transitions, 6591 flow [2024-06-21 17:46:39,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:46:39,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:46:39,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-21 17:46:39,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470284237726098 [2024-06-21 17:46:39,749 INFO L175 Difference]: Start difference. First operand has 333 places, 403 transitions, 5303 flow. Second operand 9 states and 173 transitions. [2024-06-21 17:46:39,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 451 transitions, 6591 flow [2024-06-21 17:46:42,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 451 transitions, 6497 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 17:46:42,817 INFO L231 Difference]: Finished difference. Result has 336 places, 406 transitions, 5377 flow [2024-06-21 17:46:42,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5209, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5377, PETRI_PLACES=336, PETRI_TRANSITIONS=406} [2024-06-21 17:46:42,817 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 292 predicate places. [2024-06-21 17:46:42,817 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 406 transitions, 5377 flow [2024-06-21 17:46:42,817 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) [2024-06-21 17:46:42,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:46:42,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:46:42,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-21 17:46:42,818 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)] === [2024-06-21 17:46:42,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:46:42,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1499612571, now seen corresponding path program 1 times [2024-06-21 17:46:42,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:46:42,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125000713] [2024-06-21 17:46:42,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:46:42,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:46:42,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:46:45,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:46:45,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:46:45,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125000713] [2024-06-21 17:46:45,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125000713] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:46:45,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:46:45,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:46:45,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133830589] [2024-06-21 17:46:45,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:46:45,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:46:45,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:46:45,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:46:45,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:46:45,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:46:45,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 406 transitions, 5377 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) [2024-06-21 17:46:45,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:46:45,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:46:45,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:46:48,549 INFO L124 PetriNetUnfolderBase]: 5021/8019 cut-off events. [2024-06-21 17:46:48,549 INFO L125 PetriNetUnfolderBase]: For 1261309/1261309 co-relation queries the response was YES. [2024-06-21 17:46:48,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60131 conditions, 8019 events. 5021/8019 cut-off events. For 1261309/1261309 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 51224 event pairs, 1131 based on Foata normal form. 2/8013 useless extension candidates. Maximal degree in co-relation 59966. Up to 6795 conditions per place. [2024-06-21 17:46:48,665 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 284 selfloop transitions, 153 changer transitions 0/442 dead transitions. [2024-06-21 17:46:48,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 442 transitions, 6673 flow [2024-06-21 17:46:48,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:46:48,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:46:48,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-21 17:46:48,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-21 17:46:48,666 INFO L175 Difference]: Start difference. First operand has 336 places, 406 transitions, 5377 flow. Second operand 8 states and 152 transitions. [2024-06-21 17:46:48,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 442 transitions, 6673 flow [2024-06-21 17:46:52,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 442 transitions, 6543 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-21 17:46:52,066 INFO L231 Difference]: Finished difference. Result has 338 places, 412 transitions, 5783 flow [2024-06-21 17:46:52,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5247, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5783, PETRI_PLACES=338, PETRI_TRANSITIONS=412} [2024-06-21 17:46:52,067 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 294 predicate places. [2024-06-21 17:46:52,067 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 412 transitions, 5783 flow [2024-06-21 17:46:52,067 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) [2024-06-21 17:46:52,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:46:52,067 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:46:52,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-21 17:46:52,067 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)] === [2024-06-21 17:46:52,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:46:52,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1423146055, now seen corresponding path program 2 times [2024-06-21 17:46:52,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:46:52,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709927573] [2024-06-21 17:46:52,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:46:52,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:46:52,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:46:55,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:46:55,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:46:55,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709927573] [2024-06-21 17:46:55,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709927573] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:46:55,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:46:55,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:46:55,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584406643] [2024-06-21 17:46:55,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:46:55,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:46:55,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:46:55,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:46:55,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:46:55,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:46:55,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 412 transitions, 5783 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) [2024-06-21 17:46:55,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:46:55,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:46:55,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:46:58,441 INFO L124 PetriNetUnfolderBase]: 5015/8035 cut-off events. [2024-06-21 17:46:58,441 INFO L125 PetriNetUnfolderBase]: For 1277799/1277799 co-relation queries the response was YES. [2024-06-21 17:46:58,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61107 conditions, 8035 events. 5015/8035 cut-off events. For 1277799/1277799 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 51661 event pairs, 1482 based on Foata normal form. 2/8036 useless extension candidates. Maximal degree in co-relation 60940. Up to 7517 conditions per place. [2024-06-21 17:46:58,570 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 393 selfloop transitions, 59 changer transitions 0/457 dead transitions. [2024-06-21 17:46:58,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 457 transitions, 6830 flow [2024-06-21 17:46:58,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:46:58,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:46:58,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 183 transitions. [2024-06-21 17:46:58,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255813953488372 [2024-06-21 17:46:58,571 INFO L175 Difference]: Start difference. First operand has 338 places, 412 transitions, 5783 flow. Second operand 10 states and 183 transitions. [2024-06-21 17:46:58,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 457 transitions, 6830 flow [2024-06-21 17:47:01,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 457 transitions, 6565 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-21 17:47:01,798 INFO L231 Difference]: Finished difference. Result has 342 places, 412 transitions, 5642 flow [2024-06-21 17:47:01,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5518, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5642, PETRI_PLACES=342, PETRI_TRANSITIONS=412} [2024-06-21 17:47:01,798 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 298 predicate places. [2024-06-21 17:47:01,798 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 412 transitions, 5642 flow [2024-06-21 17:47:01,799 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) [2024-06-21 17:47:01,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:47:01,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:47:01,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-21 17:47:01,799 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)] === [2024-06-21 17:47:01,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:47:01,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1380827895, now seen corresponding path program 3 times [2024-06-21 17:47:01,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:47:01,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385712423] [2024-06-21 17:47:01,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:47:01,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:47:01,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:47:04,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:47:04,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:47:04,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385712423] [2024-06-21 17:47:04,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385712423] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:47:04,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:47:04,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:47:04,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018699142] [2024-06-21 17:47:04,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:47:04,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:47:04,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:47:04,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:47:04,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:47:04,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:47:04,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 412 transitions, 5642 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) [2024-06-21 17:47:04,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:47:04,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:47:04,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:47:08,111 INFO L124 PetriNetUnfolderBase]: 5105/8159 cut-off events. [2024-06-21 17:47:08,111 INFO L125 PetriNetUnfolderBase]: For 1336106/1336106 co-relation queries the response was YES. [2024-06-21 17:47:08,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62523 conditions, 8159 events. 5105/8159 cut-off events. For 1336106/1336106 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 52253 event pairs, 1178 based on Foata normal form. 2/8159 useless extension candidates. Maximal degree in co-relation 62356. Up to 6304 conditions per place. [2024-06-21 17:47:08,212 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 261 selfloop transitions, 205 changer transitions 0/471 dead transitions. [2024-06-21 17:47:08,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 471 transitions, 7603 flow [2024-06-21 17:47:08,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:47:08,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:47:08,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-21 17:47:08,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4702842377260982 [2024-06-21 17:47:08,213 INFO L175 Difference]: Start difference. First operand has 342 places, 412 transitions, 5642 flow. Second operand 9 states and 182 transitions. [2024-06-21 17:47:08,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 471 transitions, 7603 flow [2024-06-21 17:47:11,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 471 transitions, 7494 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-21 17:47:11,393 INFO L231 Difference]: Finished difference. Result has 344 places, 425 transitions, 6193 flow [2024-06-21 17:47:11,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5533, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6193, PETRI_PLACES=344, PETRI_TRANSITIONS=425} [2024-06-21 17:47:11,394 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 300 predicate places. [2024-06-21 17:47:11,394 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 425 transitions, 6193 flow [2024-06-21 17:47:11,394 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) [2024-06-21 17:47:11,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:47:11,394 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:47:11,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-21 17:47:11,394 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)] === [2024-06-21 17:47:11,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:47:11,395 INFO L85 PathProgramCache]: Analyzing trace with hash -880899579, now seen corresponding path program 4 times [2024-06-21 17:47:11,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:47:11,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43028778] [2024-06-21 17:47:11,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:47:11,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:47:11,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:47:14,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:47:14,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:47:14,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43028778] [2024-06-21 17:47:14,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43028778] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:47:14,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:47:14,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:47:14,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061903125] [2024-06-21 17:47:14,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:47:14,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:47:14,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:47:14,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:47:14,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:47:14,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:47:14,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 425 transitions, 6193 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) [2024-06-21 17:47:14,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:47:14,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:47:14,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:47:17,494 INFO L124 PetriNetUnfolderBase]: 5307/8467 cut-off events. [2024-06-21 17:47:17,494 INFO L125 PetriNetUnfolderBase]: For 1511735/1511739 co-relation queries the response was YES. [2024-06-21 17:47:17,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68172 conditions, 8467 events. 5307/8467 cut-off events. For 1511735/1511739 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 54380 event pairs, 1172 based on Foata normal form. 6/8471 useless extension candidates. Maximal degree in co-relation 68004. Up to 6442 conditions per place. [2024-06-21 17:47:17,609 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 251 selfloop transitions, 230 changer transitions 0/486 dead transitions. [2024-06-21 17:47:17,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 486 transitions, 8536 flow [2024-06-21 17:47:17,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:47:17,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:47:17,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-06-21 17:47:17,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4796511627906977 [2024-06-21 17:47:17,611 INFO L175 Difference]: Start difference. First operand has 344 places, 425 transitions, 6193 flow. Second operand 8 states and 165 transitions. [2024-06-21 17:47:17,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 486 transitions, 8536 flow [2024-06-21 17:47:21,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 486 transitions, 7986 flow, removed 52 selfloop flow, removed 6 redundant places. [2024-06-21 17:47:21,668 INFO L231 Difference]: Finished difference. Result has 346 places, 444 transitions, 6499 flow [2024-06-21 17:47:21,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5681, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=211, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6499, PETRI_PLACES=346, PETRI_TRANSITIONS=444} [2024-06-21 17:47:21,668 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 302 predicate places. [2024-06-21 17:47:21,668 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 444 transitions, 6499 flow [2024-06-21 17:47:21,668 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) [2024-06-21 17:47:21,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:47:21,669 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:47:21,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-21 17:47:21,669 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)] === [2024-06-21 17:47:21,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:47:21,669 INFO L85 PathProgramCache]: Analyzing trace with hash -657750015, now seen corresponding path program 5 times [2024-06-21 17:47:21,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:47:21,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437756300] [2024-06-21 17:47:21,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:47:21,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:47:21,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:47:25,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:47:25,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:47:25,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437756300] [2024-06-21 17:47:25,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437756300] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:47:25,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:47:25,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:47:25,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125310525] [2024-06-21 17:47:25,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:47:25,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:47:25,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:47:25,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:47:25,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:47:25,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:47:25,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 444 transitions, 6499 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) [2024-06-21 17:47:25,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:47:25,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:47:25,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:47:28,685 INFO L124 PetriNetUnfolderBase]: 5317/8481 cut-off events. [2024-06-21 17:47:28,685 INFO L125 PetriNetUnfolderBase]: For 1537094/1537094 co-relation queries the response was YES. [2024-06-21 17:47:28,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68308 conditions, 8481 events. 5317/8481 cut-off events. For 1537094/1537094 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 54464 event pairs, 1208 based on Foata normal form. 2/8481 useless extension candidates. Maximal degree in co-relation 68139. Up to 6448 conditions per place. [2024-06-21 17:47:28,792 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 254 selfloop transitions, 227 changer transitions 0/486 dead transitions. [2024-06-21 17:47:28,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 486 transitions, 8064 flow [2024-06-21 17:47:28,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:47:28,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:47:28,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-21 17:47:28,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470284237726098 [2024-06-21 17:47:28,794 INFO L175 Difference]: Start difference. First operand has 346 places, 444 transitions, 6499 flow. Second operand 9 states and 173 transitions. [2024-06-21 17:47:28,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 486 transitions, 8064 flow [2024-06-21 17:47:32,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 486 transitions, 7700 flow, removed 65 selfloop flow, removed 3 redundant places. [2024-06-21 17:47:32,499 INFO L231 Difference]: Finished difference. Result has 352 places, 447 transitions, 6641 flow [2024-06-21 17:47:32,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6138, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=224, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6641, PETRI_PLACES=352, PETRI_TRANSITIONS=447} [2024-06-21 17:47:32,499 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 308 predicate places. [2024-06-21 17:47:32,500 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 447 transitions, 6641 flow [2024-06-21 17:47:32,500 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) [2024-06-21 17:47:32,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:47:32,500 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:47:32,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-21 17:47:32,500 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)] === [2024-06-21 17:47:32,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:47:32,501 INFO L85 PathProgramCache]: Analyzing trace with hash 895962491, now seen corresponding path program 6 times [2024-06-21 17:47:32,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:47:32,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032987920] [2024-06-21 17:47:32,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:47:32,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:47:32,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:47:35,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:47:35,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:47:35,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032987920] [2024-06-21 17:47:35,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032987920] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:47:35,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:47:35,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:47:35,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896089160] [2024-06-21 17:47:35,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:47:35,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:47:35,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:47:35,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:47:35,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:47:35,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:47:35,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 447 transitions, 6641 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) [2024-06-21 17:47:35,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:47:35,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:47:35,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:47:38,691 INFO L124 PetriNetUnfolderBase]: 5343/8521 cut-off events. [2024-06-21 17:47:38,691 INFO L125 PetriNetUnfolderBase]: For 1579438/1579442 co-relation queries the response was YES. [2024-06-21 17:47:38,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68854 conditions, 8521 events. 5343/8521 cut-off events. For 1579438/1579442 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 54755 event pairs, 1191 based on Foata normal form. 6/8525 useless extension candidates. Maximal degree in co-relation 68684. Up to 6463 conditions per place. [2024-06-21 17:47:38,809 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 247 selfloop transitions, 238 changer transitions 0/490 dead transitions. [2024-06-21 17:47:38,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 490 transitions, 8714 flow [2024-06-21 17:47:38,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:47:38,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:47:38,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-21 17:47:38,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4622093023255814 [2024-06-21 17:47:38,810 INFO L175 Difference]: Start difference. First operand has 352 places, 447 transitions, 6641 flow. Second operand 8 states and 159 transitions. [2024-06-21 17:47:38,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 490 transitions, 8714 flow [2024-06-21 17:47:42,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 490 transitions, 8397 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-21 17:47:42,654 INFO L231 Difference]: Finished difference. Result has 354 places, 453 transitions, 6920 flow [2024-06-21 17:47:42,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6330, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=232, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6920, PETRI_PLACES=354, PETRI_TRANSITIONS=453} [2024-06-21 17:47:42,654 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 310 predicate places. [2024-06-21 17:47:42,654 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 453 transitions, 6920 flow [2024-06-21 17:47:42,654 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) [2024-06-21 17:47:42,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:47:42,654 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:47:42,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-21 17:47:42,655 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)] === [2024-06-21 17:47:42,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:47:42,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1318282097, now seen corresponding path program 2 times [2024-06-21 17:47:42,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:47:42,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248770981] [2024-06-21 17:47:42,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:47:42,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:47:42,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:47:45,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:47:45,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:47:45,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248770981] [2024-06-21 17:47:45,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248770981] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:47:45,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:47:45,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:47:45,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436334690] [2024-06-21 17:47:45,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:47:45,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:47:45,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:47:45,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:47:45,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:47:45,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:47:45,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 453 transitions, 6920 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) [2024-06-21 17:47:45,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:47:45,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:47:45,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:47:49,022 INFO L124 PetriNetUnfolderBase]: 5353/8509 cut-off events. [2024-06-21 17:47:49,022 INFO L125 PetriNetUnfolderBase]: For 1615530/1615530 co-relation queries the response was YES. [2024-06-21 17:47:49,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69383 conditions, 8509 events. 5353/8509 cut-off events. For 1615530/1615530 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 54514 event pairs, 1506 based on Foata normal form. 2/8497 useless extension candidates. Maximal degree in co-relation 69212. Up to 6469 conditions per place. [2024-06-21 17:47:49,153 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 272 selfloop transitions, 210 changer transitions 0/487 dead transitions. [2024-06-21 17:47:49,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 487 transitions, 8532 flow [2024-06-21 17:47:49,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:47:49,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:47:49,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-21 17:47:49,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40568475452196384 [2024-06-21 17:47:49,154 INFO L175 Difference]: Start difference. First operand has 354 places, 453 transitions, 6920 flow. Second operand 9 states and 157 transitions. [2024-06-21 17:47:49,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 487 transitions, 8532 flow [2024-06-21 17:47:53,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 487 transitions, 8130 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-21 17:47:53,649 INFO L231 Difference]: Finished difference. Result has 359 places, 456 transitions, 7023 flow [2024-06-21 17:47:53,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6524, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=207, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7023, PETRI_PLACES=359, PETRI_TRANSITIONS=456} [2024-06-21 17:47:53,649 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 315 predicate places. [2024-06-21 17:47:53,649 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 456 transitions, 7023 flow [2024-06-21 17:47:53,649 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) [2024-06-21 17:47:53,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:47:53,649 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:47:53,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-21 17:47:53,650 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)] === [2024-06-21 17:47:53,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:47:53,650 INFO L85 PathProgramCache]: Analyzing trace with hash 1759194135, now seen corresponding path program 7 times [2024-06-21 17:47:53,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:47:53,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981133593] [2024-06-21 17:47:53,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:47:53,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:47:53,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:47:56,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:47:56,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:47:56,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981133593] [2024-06-21 17:47:56,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981133593] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:47:56,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:47:56,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:47:56,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207688768] [2024-06-21 17:47:56,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:47:56,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:47:56,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:47:56,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:47:56,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:47:56,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:47:56,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 456 transitions, 7023 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) [2024-06-21 17:47:56,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:47:56,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:47:56,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:48:00,443 INFO L124 PetriNetUnfolderBase]: 5861/9319 cut-off events. [2024-06-21 17:48:00,443 INFO L125 PetriNetUnfolderBase]: For 1746014/1746014 co-relation queries the response was YES. [2024-06-21 17:48:00,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76339 conditions, 9319 events. 5861/9319 cut-off events. For 1746014/1746014 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 60348 event pairs, 1318 based on Foata normal form. 2/9319 useless extension candidates. Maximal degree in co-relation 76167. Up to 6724 conditions per place. [2024-06-21 17:48:00,578 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 308 selfloop transitions, 330 changer transitions 0/643 dead transitions. [2024-06-21 17:48:00,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 643 transitions, 11453 flow [2024-06-21 17:48:00,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:48:00,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:48:00,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-21 17:48:00,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43953488372093025 [2024-06-21 17:48:00,579 INFO L175 Difference]: Start difference. First operand has 359 places, 456 transitions, 7023 flow. Second operand 10 states and 189 transitions. [2024-06-21 17:48:00,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 643 transitions, 11453 flow [2024-06-21 17:48:04,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 643 transitions, 10774 flow, removed 37 selfloop flow, removed 7 redundant places. [2024-06-21 17:48:04,933 INFO L231 Difference]: Finished difference. Result has 367 places, 575 transitions, 9361 flow [2024-06-21 17:48:04,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6528, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=211, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9361, PETRI_PLACES=367, PETRI_TRANSITIONS=575} [2024-06-21 17:48:04,934 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 323 predicate places. [2024-06-21 17:48:04,934 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 575 transitions, 9361 flow [2024-06-21 17:48:04,934 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) [2024-06-21 17:48:04,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:48:04,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:48:04,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-21 17:48:04,935 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)] === [2024-06-21 17:48:04,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:48:04,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1483232475, now seen corresponding path program 3 times [2024-06-21 17:48:04,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:48:04,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323082663] [2024-06-21 17:48:04,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:48:04,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:48:04,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:48:07,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:48:07,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:48:07,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323082663] [2024-06-21 17:48:07,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323082663] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:48:07,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:48:07,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:48:07,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584634281] [2024-06-21 17:48:07,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:48:07,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:48:07,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:48:07,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:48:07,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:48:07,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:48:07,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 575 transitions, 9361 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) [2024-06-21 17:48:07,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:48:07,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:48:07,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:48:11,337 INFO L124 PetriNetUnfolderBase]: 5871/9303 cut-off events. [2024-06-21 17:48:11,337 INFO L125 PetriNetUnfolderBase]: For 1780985/1780985 co-relation queries the response was YES. [2024-06-21 17:48:11,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77963 conditions, 9303 events. 5871/9303 cut-off events. For 1780985/1780985 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 60062 event pairs, 1620 based on Foata normal form. 2/9288 useless extension candidates. Maximal degree in co-relation 77786. Up to 6730 conditions per place. [2024-06-21 17:48:11,482 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 307 selfloop transitions, 295 changer transitions 0/607 dead transitions. [2024-06-21 17:48:11,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 607 transitions, 11424 flow [2024-06-21 17:48:11,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:48:11,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:48:11,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-21 17:48:11,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42441860465116277 [2024-06-21 17:48:11,483 INFO L175 Difference]: Start difference. First operand has 367 places, 575 transitions, 9361 flow. Second operand 8 states and 146 transitions. [2024-06-21 17:48:11,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 607 transitions, 11424 flow [2024-06-21 17:48:16,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 607 transitions, 11050 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-21 17:48:16,307 INFO L231 Difference]: Finished difference. Result has 372 places, 578 transitions, 9659 flow [2024-06-21 17:48:16,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8991, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=292, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9659, PETRI_PLACES=372, PETRI_TRANSITIONS=578} [2024-06-21 17:48:16,308 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 328 predicate places. [2024-06-21 17:48:16,308 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 578 transitions, 9659 flow [2024-06-21 17:48:16,308 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) [2024-06-21 17:48:16,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:48:16,308 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:48:16,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-21 17:48:16,308 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)] === [2024-06-21 17:48:16,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:48:16,308 INFO L85 PathProgramCache]: Analyzing trace with hash -390310615, now seen corresponding path program 4 times [2024-06-21 17:48:16,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:48:16,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154999376] [2024-06-21 17:48:16,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:48:16,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:48:16,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:48:19,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:48:19,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:48:19,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154999376] [2024-06-21 17:48:19,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154999376] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:48:19,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:48:19,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:48:19,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036742264] [2024-06-21 17:48:19,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:48:19,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:48:19,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:48:19,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:48:19,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:48:19,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:48:19,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 578 transitions, 9659 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) [2024-06-21 17:48:19,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:48:19,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:48:19,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:48:23,100 INFO L124 PetriNetUnfolderBase]: 5865/9297 cut-off events. [2024-06-21 17:48:23,100 INFO L125 PetriNetUnfolderBase]: For 1806499/1806499 co-relation queries the response was YES. [2024-06-21 17:48:23,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77946 conditions, 9297 events. 5865/9297 cut-off events. For 1806499/1806499 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 60125 event pairs, 1618 based on Foata normal form. 2/9282 useless extension candidates. Maximal degree in co-relation 77768. Up to 6727 conditions per place. [2024-06-21 17:48:23,244 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 294 selfloop transitions, 307 changer transitions 0/606 dead transitions. [2024-06-21 17:48:23,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 606 transitions, 11425 flow [2024-06-21 17:48:23,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:48:23,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:48:23,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-21 17:48:23,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42441860465116277 [2024-06-21 17:48:23,245 INFO L175 Difference]: Start difference. First operand has 372 places, 578 transitions, 9659 flow. Second operand 8 states and 146 transitions. [2024-06-21 17:48:23,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 606 transitions, 11425 flow [2024-06-21 17:48:27,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 606 transitions, 10783 flow, removed 43 selfloop flow, removed 5 redundant places. [2024-06-21 17:48:27,498 INFO L231 Difference]: Finished difference. Result has 375 places, 578 transitions, 9637 flow [2024-06-21 17:48:27,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9017, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=307, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9637, PETRI_PLACES=375, PETRI_TRANSITIONS=578} [2024-06-21 17:48:27,499 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 331 predicate places. [2024-06-21 17:48:27,499 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 578 transitions, 9637 flow [2024-06-21 17:48:27,499 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) [2024-06-21 17:48:27,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:48:27,499 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:48:27,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-21 17:48:27,499 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)] === [2024-06-21 17:48:27,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:48:27,499 INFO L85 PathProgramCache]: Analyzing trace with hash -463817285, now seen corresponding path program 8 times [2024-06-21 17:48:27,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:48:27,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112688446] [2024-06-21 17:48:27,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:48:27,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:48:27,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:48:30,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:48:30,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:48:30,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112688446] [2024-06-21 17:48:30,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112688446] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:48:30,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:48:30,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:48:30,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131216153] [2024-06-21 17:48:30,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:48:30,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:48:30,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:48:30,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:48:30,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:48:30,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:48:30,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 578 transitions, 9637 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) [2024-06-21 17:48:30,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:48:30,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:48:30,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:48:34,320 INFO L124 PetriNetUnfolderBase]: 5885/9365 cut-off events. [2024-06-21 17:48:34,320 INFO L125 PetriNetUnfolderBase]: For 1846603/1846603 co-relation queries the response was YES. [2024-06-21 17:48:34,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78331 conditions, 9365 events. 5885/9365 cut-off events. For 1846603/1846603 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 60873 event pairs, 1319 based on Foata normal form. 4/9367 useless extension candidates. Maximal degree in co-relation 78152. Up to 6739 conditions per place. [2024-06-21 17:48:34,447 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 259 selfloop transitions, 358 changer transitions 0/622 dead transitions. [2024-06-21 17:48:34,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 622 transitions, 11817 flow [2024-06-21 17:48:34,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:48:34,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:48:34,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-21 17:48:34,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392764857881137 [2024-06-21 17:48:34,449 INFO L175 Difference]: Start difference. First operand has 375 places, 578 transitions, 9637 flow. Second operand 9 states and 170 transitions. [2024-06-21 17:48:34,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 622 transitions, 11817 flow [2024-06-21 17:48:38,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 622 transitions, 11011 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-21 17:48:38,930 INFO L231 Difference]: Finished difference. Result has 375 places, 584 transitions, 9672 flow [2024-06-21 17:48:38,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8839, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=352, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9672, PETRI_PLACES=375, PETRI_TRANSITIONS=584} [2024-06-21 17:48:38,930 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 331 predicate places. [2024-06-21 17:48:38,931 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 584 transitions, 9672 flow [2024-06-21 17:48:38,931 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) [2024-06-21 17:48:38,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:48:38,931 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:48:38,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-21 17:48:38,931 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)] === [2024-06-21 17:48:38,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:48:38,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1488341443, now seen corresponding path program 9 times [2024-06-21 17:48:38,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:48:38,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083455339] [2024-06-21 17:48:38,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:48:38,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:48:38,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:48:42,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:48:42,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:48:42,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083455339] [2024-06-21 17:48:42,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083455339] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:48:42,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:48:42,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:48:42,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999494573] [2024-06-21 17:48:42,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:48:42,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:48:42,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:48:42,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:48:42,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:48:42,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:48:42,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 584 transitions, 9672 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) [2024-06-21 17:48:42,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:48:42,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:48:42,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:48:46,133 INFO L124 PetriNetUnfolderBase]: 5873/9349 cut-off events. [2024-06-21 17:48:46,134 INFO L125 PetriNetUnfolderBase]: For 1849713/1849713 co-relation queries the response was YES. [2024-06-21 17:48:46,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78112 conditions, 9349 events. 5873/9349 cut-off events. For 1849713/1849713 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 60713 event pairs, 1326 based on Foata normal form. 4/9351 useless extension candidates. Maximal degree in co-relation 77932. Up to 6733 conditions per place. [2024-06-21 17:48:46,281 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 256 selfloop transitions, 359 changer transitions 0/620 dead transitions. [2024-06-21 17:48:46,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 620 transitions, 11502 flow [2024-06-21 17:48:46,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:48:46,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:48:46,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-21 17:48:46,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4315245478036176 [2024-06-21 17:48:46,282 INFO L175 Difference]: Start difference. First operand has 375 places, 584 transitions, 9672 flow. Second operand 9 states and 167 transitions. [2024-06-21 17:48:46,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 620 transitions, 11502 flow [2024-06-21 17:48:51,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 620 transitions, 10970 flow, removed 42 selfloop flow, removed 5 redundant places. [2024-06-21 17:48:51,260 INFO L231 Difference]: Finished difference. Result has 379 places, 584 transitions, 9871 flow [2024-06-21 17:48:51,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9140, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=584, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=359, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9871, PETRI_PLACES=379, PETRI_TRANSITIONS=584} [2024-06-21 17:48:51,260 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 335 predicate places. [2024-06-21 17:48:51,260 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 584 transitions, 9871 flow [2024-06-21 17:48:51,261 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) [2024-06-21 17:48:51,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:48:51,261 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:48:51,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-21 17:48:51,261 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)] === [2024-06-21 17:48:51,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:48:51,261 INFO L85 PathProgramCache]: Analyzing trace with hash 528435083, now seen corresponding path program 5 times [2024-06-21 17:48:51,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:48:51,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526992485] [2024-06-21 17:48:51,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:48:51,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:48:51,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:48:54,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:48:54,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:48:54,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526992485] [2024-06-21 17:48:54,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526992485] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:48:54,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:48:54,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:48:54,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899028558] [2024-06-21 17:48:54,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:48:54,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:48:54,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:48:54,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:48:54,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:48:54,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:48:54,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 584 transitions, 9871 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) [2024-06-21 17:48:54,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:48:54,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:48:54,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:48:57,601 INFO L124 PetriNetUnfolderBase]: 5883/9328 cut-off events. [2024-06-21 17:48:57,602 INFO L125 PetriNetUnfolderBase]: For 1877573/1877573 co-relation queries the response was YES. [2024-06-21 17:48:57,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78570 conditions, 9328 events. 5883/9328 cut-off events. For 1877573/1877573 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 60360 event pairs, 1510 based on Foata normal form. 2/9322 useless extension candidates. Maximal degree in co-relation 78389. Up to 8233 conditions per place. [2024-06-21 17:48:57,746 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 479 selfloop transitions, 128 changer transitions 0/612 dead transitions. [2024-06-21 17:48:57,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 612 transitions, 11689 flow [2024-06-21 17:48:57,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:48:57,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:48:57,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-21 17:48:57,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3883720930232558 [2024-06-21 17:48:57,747 INFO L175 Difference]: Start difference. First operand has 379 places, 584 transitions, 9871 flow. Second operand 10 states and 167 transitions. [2024-06-21 17:48:57,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 612 transitions, 11689 flow [2024-06-21 17:49:02,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 612 transitions, 10676 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-21 17:49:02,736 INFO L231 Difference]: Finished difference. Result has 379 places, 587 transitions, 9192 flow [2024-06-21 17:49:02,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8866, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=584, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9192, PETRI_PLACES=379, PETRI_TRANSITIONS=587} [2024-06-21 17:49:02,737 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 335 predicate places. [2024-06-21 17:49:02,737 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 587 transitions, 9192 flow [2024-06-21 17:49:02,737 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) [2024-06-21 17:49:02,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:49:02,737 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:49:02,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-21 17:49:02,737 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)] === [2024-06-21 17:49:02,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:49:02,738 INFO L85 PathProgramCache]: Analyzing trace with hash 720196841, now seen corresponding path program 6 times [2024-06-21 17:49:02,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:49:02,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718286454] [2024-06-21 17:49:02,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:49:02,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:49:02,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:49:05,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:49:05,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:49:05,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718286454] [2024-06-21 17:49:05,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718286454] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:49:05,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:49:05,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:49:05,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696062872] [2024-06-21 17:49:05,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:49:05,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:49:05,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:49:05,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:49:05,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:49:05,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:49:05,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 587 transitions, 9192 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) [2024-06-21 17:49:05,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:49:05,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:49:05,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:49:09,067 INFO L124 PetriNetUnfolderBase]: 5893/9362 cut-off events. [2024-06-21 17:49:09,067 INFO L125 PetriNetUnfolderBase]: For 1858874/1858874 co-relation queries the response was YES. [2024-06-21 17:49:09,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77434 conditions, 9362 events. 5893/9362 cut-off events. For 1858874/1858874 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 60693 event pairs, 1520 based on Foata normal form. 2/9356 useless extension candidates. Maximal degree in co-relation 77253. Up to 8239 conditions per place. [2024-06-21 17:49:09,220 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 483 selfloop transitions, 124 changer transitions 0/612 dead transitions. [2024-06-21 17:49:09,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 612 transitions, 11006 flow [2024-06-21 17:49:09,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:49:09,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:49:09,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-21 17:49:09,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-21 17:49:09,221 INFO L175 Difference]: Start difference. First operand has 379 places, 587 transitions, 9192 flow. Second operand 9 states and 153 transitions. [2024-06-21 17:49:09,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 612 transitions, 11006 flow [2024-06-21 17:49:13,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 612 transitions, 10691 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-21 17:49:13,679 INFO L231 Difference]: Finished difference. Result has 380 places, 590 transitions, 9199 flow [2024-06-21 17:49:13,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8881, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=587, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=466, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9199, PETRI_PLACES=380, PETRI_TRANSITIONS=590} [2024-06-21 17:49:13,680 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 336 predicate places. [2024-06-21 17:49:13,680 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 590 transitions, 9199 flow [2024-06-21 17:49:13,680 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) [2024-06-21 17:49:13,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:49:13,680 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:49:13,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-21 17:49:13,680 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)] === [2024-06-21 17:49:13,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:49:13,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1992719799, now seen corresponding path program 7 times [2024-06-21 17:49:13,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:49:13,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071691026] [2024-06-21 17:49:13,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:49:13,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:49:13,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:49:16,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:49:16,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:49:16,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071691026] [2024-06-21 17:49:16,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071691026] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:49:16,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:49:16,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:49:16,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928094910] [2024-06-21 17:49:16,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:49:16,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:49:16,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:49:16,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:49:16,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:49:16,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:49:16,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 590 transitions, 9199 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) [2024-06-21 17:49:16,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:49:16,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:49:16,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:49:19,982 INFO L124 PetriNetUnfolderBase]: 5887/9340 cut-off events. [2024-06-21 17:49:19,982 INFO L125 PetriNetUnfolderBase]: For 1874430/1874430 co-relation queries the response was YES. [2024-06-21 17:49:20,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77292 conditions, 9340 events. 5887/9340 cut-off events. For 1874430/1874430 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 60457 event pairs, 1531 based on Foata normal form. 2/9334 useless extension candidates. Maximal degree in co-relation 77110. Up to 8236 conditions per place. [2024-06-21 17:49:20,154 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 484 selfloop transitions, 122 changer transitions 0/611 dead transitions. [2024-06-21 17:49:20,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 611 transitions, 10709 flow [2024-06-21 17:49:20,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:49:20,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:49:20,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-21 17:49:20,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39018087855297157 [2024-06-21 17:49:20,156 INFO L175 Difference]: Start difference. First operand has 380 places, 590 transitions, 9199 flow. Second operand 9 states and 151 transitions. [2024-06-21 17:49:20,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 611 transitions, 10709 flow [2024-06-21 17:49:26,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 611 transitions, 10381 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-21 17:49:26,230 INFO L231 Difference]: Finished difference. Result has 382 places, 590 transitions, 9124 flow [2024-06-21 17:49:26,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8871, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=590, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9124, PETRI_PLACES=382, PETRI_TRANSITIONS=590} [2024-06-21 17:49:26,231 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 338 predicate places. [2024-06-21 17:49:26,231 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 590 transitions, 9124 flow [2024-06-21 17:49:26,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:49:26,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:49:26,231 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:49:26,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-21 17:49:26,231 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)] === [2024-06-21 17:49:26,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:49:26,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1992927003, now seen corresponding path program 10 times [2024-06-21 17:49:26,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:49:26,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704270054] [2024-06-21 17:49:26,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:49:26,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:49:26,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:49:29,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:49:29,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:49:29,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704270054] [2024-06-21 17:49:29,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704270054] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:49:29,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:49:29,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:49:29,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373719714] [2024-06-21 17:49:29,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:49:29,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:49:29,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:49:29,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:49:29,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:49:29,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:49:29,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 590 transitions, 9124 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) [2024-06-21 17:49:29,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:49:29,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:49:29,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:49:32,559 INFO L124 PetriNetUnfolderBase]: 5875/9356 cut-off events. [2024-06-21 17:49:32,559 INFO L125 PetriNetUnfolderBase]: For 1888567/1888567 co-relation queries the response was YES. [2024-06-21 17:49:32,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76834 conditions, 9356 events. 5875/9356 cut-off events. For 1888567/1888567 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 60867 event pairs, 1640 based on Foata normal form. 4/9359 useless extension candidates. Maximal degree in co-relation 76652. Up to 8766 conditions per place. [2024-06-21 17:49:32,713 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 536 selfloop transitions, 75 changer transitions 0/616 dead transitions. [2024-06-21 17:49:32,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 616 transitions, 10668 flow [2024-06-21 17:49:32,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:49:32,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:49:32,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-21 17:49:32,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-21 17:49:32,714 INFO L175 Difference]: Start difference. First operand has 382 places, 590 transitions, 9124 flow. Second operand 9 states and 153 transitions. [2024-06-21 17:49:32,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 616 transitions, 10668 flow [2024-06-21 17:49:37,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 616 transitions, 10354 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-21 17:49:37,226 INFO L231 Difference]: Finished difference. Result has 382 places, 590 transitions, 8969 flow [2024-06-21 17:49:37,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8810, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=590, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=515, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8969, PETRI_PLACES=382, PETRI_TRANSITIONS=590} [2024-06-21 17:49:37,227 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 338 predicate places. [2024-06-21 17:49:37,227 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 590 transitions, 8969 flow [2024-06-21 17:49:37,227 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) [2024-06-21 17:49:37,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:49:37,227 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, 1, 1] [2024-06-21 17:49:37,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-21 17:49:37,227 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)] === [2024-06-21 17:49:37,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:49:37,228 INFO L85 PathProgramCache]: Analyzing trace with hash -292231619, now seen corresponding path program 11 times [2024-06-21 17:49:37,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:49:37,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971510770] [2024-06-21 17:49:37,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:49:37,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:49:37,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:49:40,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:49:40,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:49:40,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971510770] [2024-06-21 17:49:40,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971510770] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:49:40,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:49:40,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:49:40,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603538807] [2024-06-21 17:49:40,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:49:40,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:49:40,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:49:40,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:49:40,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:49:40,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:49:40,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 590 transitions, 8969 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) [2024-06-21 17:49:40,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:49:40,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:49:40,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:49:44,113 INFO L124 PetriNetUnfolderBase]: 5863/9336 cut-off events. [2024-06-21 17:49:44,113 INFO L125 PetriNetUnfolderBase]: For 1886851/1886851 co-relation queries the response was YES. [2024-06-21 17:49:44,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76127 conditions, 9336 events. 5863/9336 cut-off events. For 1886851/1886851 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 60802 event pairs, 1642 based on Foata normal form. 4/9339 useless extension candidates. Maximal degree in co-relation 75944. Up to 8756 conditions per place. [2024-06-21 17:49:44,252 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 536 selfloop transitions, 75 changer transitions 0/616 dead transitions. [2024-06-21 17:49:44,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 616 transitions, 10275 flow [2024-06-21 17:49:44,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:49:44,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:49:44,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2024-06-21 17:49:44,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3813953488372093 [2024-06-21 17:49:44,253 INFO L175 Difference]: Start difference. First operand has 382 places, 590 transitions, 8969 flow. Second operand 10 states and 164 transitions. [2024-06-21 17:49:44,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 616 transitions, 10275 flow [2024-06-21 17:49:48,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 616 transitions, 10103 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-21 17:49:48,827 INFO L231 Difference]: Finished difference. Result has 385 places, 590 transitions, 8957 flow [2024-06-21 17:49:48,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8797, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=590, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=515, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8957, PETRI_PLACES=385, PETRI_TRANSITIONS=590} [2024-06-21 17:49:48,828 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 341 predicate places. [2024-06-21 17:49:48,828 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 590 transitions, 8957 flow [2024-06-21 17:49:48,828 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) [2024-06-21 17:49:48,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:49:48,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:49:48,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-21 17:49:48,828 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)] === [2024-06-21 17:49:48,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:49:48,828 INFO L85 PathProgramCache]: Analyzing trace with hash 903290457, now seen corresponding path program 1 times [2024-06-21 17:49:48,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:49:48,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968921029] [2024-06-21 17:49:48,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:49:48,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:49:48,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:49:51,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:49:51,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:49:51,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968921029] [2024-06-21 17:49:51,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968921029] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:49:51,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:49:51,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:49:51,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936050576] [2024-06-21 17:49:51,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:49:51,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:49:51,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:49:51,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:49:51,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:49:51,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:49:51,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 590 transitions, 8957 flow. Second operand has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:49:51,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:49:51,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:49:51,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:49:55,314 INFO L124 PetriNetUnfolderBase]: 6054/9639 cut-off events. [2024-06-21 17:49:55,314 INFO L125 PetriNetUnfolderBase]: For 2126210/2126210 co-relation queries the response was YES. [2024-06-21 17:49:55,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81872 conditions, 9639 events. 6054/9639 cut-off events. For 2126210/2126210 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 62826 event pairs, 1419 based on Foata normal form. 2/9639 useless extension candidates. Maximal degree in co-relation 81688. Up to 8182 conditions per place. [2024-06-21 17:49:55,500 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 479 selfloop transitions, 156 changer transitions 0/640 dead transitions. [2024-06-21 17:49:55,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 640 transitions, 10761 flow [2024-06-21 17:49:55,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:49:55,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:49:55,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-21 17:49:55,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-21 17:49:55,501 INFO L175 Difference]: Start difference. First operand has 385 places, 590 transitions, 8957 flow. Second operand 8 states and 160 transitions. [2024-06-21 17:49:55,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 640 transitions, 10761 flow [2024-06-21 17:50:01,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 640 transitions, 10598 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-21 17:50:01,405 INFO L231 Difference]: Finished difference. Result has 385 places, 598 transitions, 9294 flow [2024-06-21 17:50:01,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8794, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=590, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9294, PETRI_PLACES=385, PETRI_TRANSITIONS=598} [2024-06-21 17:50:01,405 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 341 predicate places. [2024-06-21 17:50:01,405 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 598 transitions, 9294 flow [2024-06-21 17:50:01,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:50:01,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:50:01,405 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:50:01,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-21 17:50:01,405 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)] === [2024-06-21 17:50:01,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:50:01,406 INFO L85 PathProgramCache]: Analyzing trace with hash -450881249, now seen corresponding path program 2 times [2024-06-21 17:50:01,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:50:01,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189379527] [2024-06-21 17:50:01,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:50:01,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:50:01,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:50:04,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:50:04,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:50:04,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189379527] [2024-06-21 17:50:04,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189379527] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:50:04,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:50:04,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:50:04,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798309266] [2024-06-21 17:50:04,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:50:04,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:50:04,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:50:04,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:50:04,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:50:04,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:50:04,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 598 transitions, 9294 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:50:04,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:50:04,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:50:04,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:50:08,451 INFO L124 PetriNetUnfolderBase]: 6049/9638 cut-off events. [2024-06-21 17:50:08,452 INFO L125 PetriNetUnfolderBase]: For 2150327/2150327 co-relation queries the response was YES. [2024-06-21 17:50:08,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82826 conditions, 9638 events. 6049/9638 cut-off events. For 2150327/2150327 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 62905 event pairs, 1431 based on Foata normal form. 2/9638 useless extension candidates. Maximal degree in co-relation 82640. Up to 8408 conditions per place. [2024-06-21 17:50:08,610 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 474 selfloop transitions, 151 changer transitions 0/630 dead transitions. [2024-06-21 17:50:08,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 630 transitions, 10650 flow [2024-06-21 17:50:08,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:50:08,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:50:08,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-21 17:50:08,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-21 17:50:08,611 INFO L175 Difference]: Start difference. First operand has 385 places, 598 transitions, 9294 flow. Second operand 8 states and 150 transitions. [2024-06-21 17:50:08,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 630 transitions, 10650 flow [2024-06-21 17:50:14,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 630 transitions, 10334 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-21 17:50:14,847 INFO L231 Difference]: Finished difference. Result has 388 places, 598 transitions, 9286 flow [2024-06-21 17:50:14,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8978, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=598, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9286, PETRI_PLACES=388, PETRI_TRANSITIONS=598} [2024-06-21 17:50:14,847 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 344 predicate places. [2024-06-21 17:50:14,847 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 598 transitions, 9286 flow [2024-06-21 17:50:14,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:50:14,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:50:14,847 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:50:14,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-21 17:50:14,848 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:50:14,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:50:14,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1055751479, now seen corresponding path program 3 times [2024-06-21 17:50:14,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:50:14,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727208989] [2024-06-21 17:50:14,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:50:14,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:50:14,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:50:18,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:50:18,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:50:18,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727208989] [2024-06-21 17:50:18,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727208989] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:50:18,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:50:18,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:50:18,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332311637] [2024-06-21 17:50:18,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:50:18,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:50:18,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:50:18,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:50:18,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:50:18,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:50:18,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 598 transitions, 9286 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:50:18,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:50:18,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:50:18,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:50:21,980 INFO L124 PetriNetUnfolderBase]: 6057/9642 cut-off events. [2024-06-21 17:50:21,980 INFO L125 PetriNetUnfolderBase]: For 2183974/2183974 co-relation queries the response was YES. [2024-06-21 17:50:22,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83005 conditions, 9642 events. 6057/9642 cut-off events. For 2183974/2183974 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 62865 event pairs, 1455 based on Foata normal form. 2/9642 useless extension candidates. Maximal degree in co-relation 82818. Up to 8420 conditions per place. [2024-06-21 17:50:22,133 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 476 selfloop transitions, 151 changer transitions 0/632 dead transitions. [2024-06-21 17:50:22,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 632 transitions, 10685 flow [2024-06-21 17:50:22,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:50:22,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:50:22,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-21 17:50:22,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4160206718346253 [2024-06-21 17:50:22,135 INFO L175 Difference]: Start difference. First operand has 388 places, 598 transitions, 9286 flow. Second operand 9 states and 161 transitions. [2024-06-21 17:50:22,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 632 transitions, 10685 flow [2024-06-21 17:50:27,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 632 transitions, 10420 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-21 17:50:27,932 INFO L231 Difference]: Finished difference. Result has 393 places, 600 transitions, 9372 flow [2024-06-21 17:50:27,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9021, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=598, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9372, PETRI_PLACES=393, PETRI_TRANSITIONS=600} [2024-06-21 17:50:27,933 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 349 predicate places. [2024-06-21 17:50:27,933 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 600 transitions, 9372 flow [2024-06-21 17:50:27,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:50:27,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:50:27,933 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:50:27,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-21 17:50:27,934 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:50:27,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:50:27,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1663914697, now seen corresponding path program 4 times [2024-06-21 17:50:27,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:50:27,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284722795] [2024-06-21 17:50:27,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:50:27,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:50:27,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:50:31,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:50:31,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:50:31,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284722795] [2024-06-21 17:50:31,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284722795] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:50:31,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:50:31,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:50:31,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339395618] [2024-06-21 17:50:31,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:50:31,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:50:31,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:50:31,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:50:31,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:50:31,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:50:31,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 600 transitions, 9372 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:50:31,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:50:31,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:50:31,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:50:34,964 INFO L124 PetriNetUnfolderBase]: 6101/9682 cut-off events. [2024-06-21 17:50:34,964 INFO L125 PetriNetUnfolderBase]: For 2297376/2297376 co-relation queries the response was YES. [2024-06-21 17:50:35,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83708 conditions, 9682 events. 6101/9682 cut-off events. For 2297376/2297376 co-relation queries the response was YES. Maximal size of possible extension queue 550. Compared 63051 event pairs, 1682 based on Foata normal form. 12/9693 useless extension candidates. Maximal degree in co-relation 83520. Up to 9092 conditions per place. [2024-06-21 17:50:35,122 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 562 selfloop transitions, 54 changer transitions 11/632 dead transitions. [2024-06-21 17:50:35,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 632 transitions, 10785 flow [2024-06-21 17:50:35,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:50:35,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:50:35,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-21 17:50:35,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4005167958656331 [2024-06-21 17:50:35,124 INFO L175 Difference]: Start difference. First operand has 393 places, 600 transitions, 9372 flow. Second operand 9 states and 155 transitions. [2024-06-21 17:50:35,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 632 transitions, 10785 flow [2024-06-21 17:50:42,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 632 transitions, 10585 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-21 17:50:42,016 INFO L231 Difference]: Finished difference. Result has 397 places, 596 transitions, 9163 flow [2024-06-21 17:50:42,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9172, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=600, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=546, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9163, PETRI_PLACES=397, PETRI_TRANSITIONS=596} [2024-06-21 17:50:42,017 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 353 predicate places. [2024-06-21 17:50:42,017 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 596 transitions, 9163 flow [2024-06-21 17:50:42,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:50:42,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:50:42,017 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:50:42,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-21 17:50:42,018 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:50:42,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:50:42,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1261894495, now seen corresponding path program 12 times [2024-06-21 17:50:42,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:50:42,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502741634] [2024-06-21 17:50:42,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:50:42,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:50:42,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:50:45,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:50:45,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:50:45,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502741634] [2024-06-21 17:50:45,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502741634] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:50:45,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:50:45,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:50:45,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471299571] [2024-06-21 17:50:45,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:50:45,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:50:45,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:50:45,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:50:45,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:50:45,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:50:45,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 596 transitions, 9163 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) [2024-06-21 17:50:45,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:50:45,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:50:45,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:50:49,122 INFO L124 PetriNetUnfolderBase]: 6037/9582 cut-off events. [2024-06-21 17:50:49,122 INFO L125 PetriNetUnfolderBase]: For 2239946/2239946 co-relation queries the response was YES. [2024-06-21 17:50:49,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82489 conditions, 9582 events. 6037/9582 cut-off events. For 2239946/2239946 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 62249 event pairs, 1613 based on Foata normal form. 4/9572 useless extension candidates. Maximal degree in co-relation 82300. Up to 7014 conditions per place. [2024-06-21 17:50:49,275 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 332 selfloop transitions, 302 changer transitions 0/639 dead transitions. [2024-06-21 17:50:49,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 639 transitions, 11103 flow [2024-06-21 17:50:49,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:50:49,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:50:49,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-21 17:50:49,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470284237726098 [2024-06-21 17:50:49,276 INFO L175 Difference]: Start difference. First operand has 397 places, 596 transitions, 9163 flow. Second operand 9 states and 173 transitions. [2024-06-21 17:50:49,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 639 transitions, 11103 flow [2024-06-21 17:50:55,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 639 transitions, 10965 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-21 17:50:55,716 INFO L231 Difference]: Finished difference. Result has 399 places, 596 transitions, 9638 flow [2024-06-21 17:50:55,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9025, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=596, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=302, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9638, PETRI_PLACES=399, PETRI_TRANSITIONS=596} [2024-06-21 17:50:55,716 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 355 predicate places. [2024-06-21 17:50:55,716 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 596 transitions, 9638 flow [2024-06-21 17:50:55,716 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) [2024-06-21 17:50:55,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:50:55,716 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, 1, 1] [2024-06-21 17:50:55,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-21 17:50:55,717 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:50:55,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:50:55,717 INFO L85 PathProgramCache]: Analyzing trace with hash 1262014465, now seen corresponding path program 13 times [2024-06-21 17:50:55,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:50:55,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398433995] [2024-06-21 17:50:55,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:50:55,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:50:55,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:50:59,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:50:59,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:50:59,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398433995] [2024-06-21 17:50:59,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398433995] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:50:59,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:50:59,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:50:59,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583088842] [2024-06-21 17:50:59,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:50:59,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:50:59,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:50:59,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:50:59,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:50:59,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:50:59,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 596 transitions, 9638 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) [2024-06-21 17:50:59,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:50:59,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:50:59,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:51:03,198 INFO L124 PetriNetUnfolderBase]: 6057/9612 cut-off events. [2024-06-21 17:51:03,199 INFO L125 PetriNetUnfolderBase]: For 2286713/2286713 co-relation queries the response was YES. [2024-06-21 17:51:03,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84256 conditions, 9612 events. 6057/9612 cut-off events. For 2286713/2286713 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 62514 event pairs, 1648 based on Foata normal form. 4/9600 useless extension candidates. Maximal degree in co-relation 84066. Up to 7026 conditions per place. [2024-06-21 17:51:03,356 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 330 selfloop transitions, 303 changer transitions 0/638 dead transitions. [2024-06-21 17:51:03,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 638 transitions, 11454 flow [2024-06-21 17:51:03,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:51:03,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:51:03,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-21 17:51:03,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42377260981912146 [2024-06-21 17:51:03,358 INFO L175 Difference]: Start difference. First operand has 399 places, 596 transitions, 9638 flow. Second operand 9 states and 164 transitions. [2024-06-21 17:51:03,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 638 transitions, 11454 flow Killed by 15