./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe015_rmo.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_rmo.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe015_rmo.i ./goblint.2024-06-19_11-23-25.files/protection/safe015_rmo.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 21:13:17,948 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 21:13:17,983 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 21:13:17,986 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 21:13:17,986 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 21:13:18,014 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 21:13:18,014 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 21:13:18,014 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 21:13:18,015 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 21:13:18,015 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 21:13:18,015 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 21:13:18,015 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 21:13:18,016 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 21:13:18,016 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 21:13:18,016 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 21:13:18,024 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 21:13:18,025 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 21:13:18,025 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 21:13:18,025 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 21:13:18,025 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 21:13:18,026 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 21:13:18,028 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 21:13:18,028 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 21:13:18,028 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 21:13:18,029 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 21:13:18,029 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 21:13:18,029 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 21:13:18,029 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 21:13:18,029 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 21:13:18,029 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 21:13:18,030 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 21:13:18,030 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 21:13:18,030 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 21:13:18,030 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 21:13:18,030 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 21:13:18,030 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 21:13:18,031 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 21:13:18,031 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 21:13:18,031 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 21:13:18,031 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 21:13:18,031 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 21:13:18,034 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 21:13:18,034 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 21:13:18,034 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 21:13:18,217 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 21:13:18,239 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 21:13:18,241 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 21:13:18,242 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 21:13:18,243 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 21:13:18,243 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe015_rmo.yml/witness.yml [2024-06-27 21:13:18,432 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 21:13:18,432 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 21:13:18,432 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe015_rmo.i [2024-06-27 21:13:19,446 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 21:13:19,649 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 21:13:19,656 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe015_rmo.i [2024-06-27 21:13:19,675 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a04f5d010/04a22b39697549709ecc97dc02d85644/FLAGaa9ef8386 [2024-06-27 21:13:19,687 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a04f5d010/04a22b39697549709ecc97dc02d85644 [2024-06-27 21:13:19,687 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 21:13:19,688 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 21:13:19,689 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 21:13:19,689 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 21:13:19,702 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 21:13:19,703 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:13:18" (1/2) ... [2024-06-27 21:13:19,704 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@191e7fa5 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:13:19, skipping insertion in model container [2024-06-27 21:13:19,704 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:13:18" (1/2) ... [2024-06-27 21:13:19,705 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7414be16 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:13:19, skipping insertion in model container [2024-06-27 21:13:19,705 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 09:13:19" (2/2) ... [2024-06-27 21:13:19,705 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@191e7fa5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:13:19, skipping insertion in model container [2024-06-27 21:13:19,705 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 09:13:19" (2/2) ... [2024-06-27 21:13:19,705 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 21:13:19,865 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 21:13:19,866 INFO L97 edCorrectnessWitness]: Location invariant before [L855-L855] (((((((((((((((((((((((((((((((((((! 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$flush_delayed == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2)) [2024-06-27 21:13:19,867 INFO L97 edCorrectnessWitness]: Location invariant before [L857-L857] (((((((((((((((((((((((((((((((((((! multithreaded || x$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)) [2024-06-27 21:13:19,867 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)) [2024-06-27 21:13:19,867 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 21:13:19,867 INFO L106 edCorrectnessWitness]: ghost_update [L853-L853] multithreaded = 1; [2024-06-27 21:13:19,906 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 21:13:20,242 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 21:13:20,249 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 21:13:20,394 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 21:13:20,436 INFO L206 MainTranslator]: Completed translation [2024-06-27 21:13:20,437 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:13:20 WrapperNode [2024-06-27 21:13:20,437 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 21:13:20,438 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 21:13:20,438 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 21:13:20,438 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 21:13:20,443 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:13:20" (1/1) ... [2024-06-27 21:13:20,467 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:13:20" (1/1) ... [2024-06-27 21:13:20,500 INFO L138 Inliner]: procedures = 175, calls = 91, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 224 [2024-06-27 21:13:20,500 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 21:13:20,501 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 21:13:20,501 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 21:13:20,501 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 21:13:20,509 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:13:20" (1/1) ... [2024-06-27 21:13:20,509 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:13:20" (1/1) ... [2024-06-27 21:13:20,513 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:13:20" (1/1) ... [2024-06-27 21:13:20,527 INFO L175 MemorySlicer]: Split 48 memory accesses to 2 slices as follows [2, 46]. 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]. [2024-06-27 21:13:20,543 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:13:20" (1/1) ... [2024-06-27 21:13:20,544 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:13:20" (1/1) ... [2024-06-27 21:13:20,553 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:13:20" (1/1) ... [2024-06-27 21:13:20,569 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:13:20" (1/1) ... [2024-06-27 21:13:20,571 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:13:20" (1/1) ... [2024-06-27 21:13:20,572 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:13:20" (1/1) ... [2024-06-27 21:13:20,576 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 21:13:20,586 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 21:13:20,586 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 21:13:20,586 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 21:13:20,587 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:13:20" (1/1) ... [2024-06-27 21:13:20,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 21:13:20,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:13:20,614 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-27 21:13:20,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-27 21:13:20,642 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-27 21:13:20,642 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-27 21:13:20,642 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-27 21:13:20,642 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-27 21:13:20,642 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 21:13:20,642 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 21:13:20,642 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 21:13:20,643 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 21:13:20,643 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 21:13:20,643 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 21:13:20,643 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 21:13:20,643 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 21:13:20,643 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 21:13:20,643 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-27 21:13:20,643 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 21:13:20,643 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 21:13:20,643 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 21:13:20,644 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 21:13:20,766 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 21:13:20,767 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 21:13:21,268 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 21:13:21,268 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 21:13:21,597 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 21:13:21,597 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 21:13:21,597 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 09:13:21 BoogieIcfgContainer [2024-06-27 21:13:21,597 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 21:13:21,600 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 21:13:21,600 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 21:13:21,603 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 21:13:21,603 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:13:18" (1/4) ... [2024-06-27 21:13:21,603 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64f88819 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 09:13:21, skipping insertion in model container [2024-06-27 21:13:21,603 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 09:13:19" (2/4) ... [2024-06-27 21:13:21,603 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64f88819 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 09:13:21, skipping insertion in model container [2024-06-27 21:13:21,603 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:13:20" (3/4) ... [2024-06-27 21:13:21,604 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64f88819 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 09:13:21, skipping insertion in model container [2024-06-27 21:13:21,604 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 09:13:21" (4/4) ... [2024-06-27 21:13:21,605 INFO L112 eAbstractionObserver]: Analyzing ICFG safe015_rmo.i [2024-06-27 21:13:21,619 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 21:13:21,619 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-27 21:13:21,619 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 21:13:21,671 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 21:13:21,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 43 transitions, 98 flow [2024-06-27 21:13:21,732 INFO L124 PetriNetUnfolderBase]: 0/40 cut-off events. [2024-06-27 21:13:21,732 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 21:13:21,733 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 63 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. [2024-06-27 21:13:21,734 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 43 transitions, 98 flow [2024-06-27 21:13:21,736 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 34 transitions, 77 flow [2024-06-27 21:13:21,747 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 21:13:21,753 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;@7ed61776, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 21:13:21,753 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-27 21:13:21,758 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 21:13:21,758 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 21:13:21,758 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 21:13:21,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:13:21,783 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 21:13:21,784 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:13:21,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:13:21,790 INFO L85 PathProgramCache]: Analyzing trace with hash 802628181, now seen corresponding path program 1 times [2024-06-27 21:13:21,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:13:21,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063124287] [2024-06-27 21:13:21,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:13:21,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:13:21,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:13:23,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:13:23,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:13:23,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063124287] [2024-06-27 21:13:23,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063124287] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:13:23,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:13:23,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 21:13:23,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436433834] [2024-06-27 21:13:23,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:13:23,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 21:13:23,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:13:23,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 21:13:23,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 21:13:23,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 21:13:23,362 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) [2024-06-27 21:13:23,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:13:23,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 21:13:23,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:13:23,920 INFO L124 PetriNetUnfolderBase]: 1412/2149 cut-off events. [2024-06-27 21:13:23,920 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-06-27 21:13:23,926 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 10232 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. [2024-06-27 21:13:23,935 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 36 selfloop transitions, 4 changer transitions 0/46 dead transitions. [2024-06-27 21:13:23,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 46 transitions, 187 flow [2024-06-27 21:13:23,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 21:13:23,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 21:13:23,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 70 transitions. [2024-06-27 21:13:23,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5426356589147286 [2024-06-27 21:13:23,946 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 77 flow. Second operand 3 states and 70 transitions. [2024-06-27 21:13:23,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 46 transitions, 187 flow [2024-06-27 21:13:23,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 46 transitions, 182 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 21:13:23,952 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 104 flow [2024-06-27 21:13:23,954 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} [2024-06-27 21:13:23,956 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2024-06-27 21:13:23,956 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 104 flow [2024-06-27 21:13:23,957 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) [2024-06-27 21:13:23,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:13:23,957 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:13:23,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 21:13:23,957 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:13:23,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:13:23,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1767226876, now seen corresponding path program 1 times [2024-06-27 21:13:23,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:13:23,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052698133] [2024-06-27 21:13:23,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:13:23,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:13:24,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:13:25,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:13:25,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:13:25,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052698133] [2024-06-27 21:13:25,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052698133] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:13:25,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:13:25,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 21:13:25,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419175286] [2024-06-27 21:13:25,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:13:25,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 21:13:25,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:13:25,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 21:13:25,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 21:13:25,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 21:13:25,287 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) [2024-06-27 21:13:25,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:13:25,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 21:13:25,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:13:25,722 INFO L124 PetriNetUnfolderBase]: 1400/2131 cut-off events. [2024-06-27 21:13:25,723 INFO L125 PetriNetUnfolderBase]: For 399/399 co-relation queries the response was YES. [2024-06-27 21:13:25,726 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 10170 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. [2024-06-27 21:13:25,734 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 46 selfloop transitions, 7 changer transitions 0/59 dead transitions. [2024-06-27 21:13:25,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 59 transitions, 266 flow [2024-06-27 21:13:25,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 21:13:25,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 21:13:25,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 92 transitions. [2024-06-27 21:13:25,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5348837209302325 [2024-06-27 21:13:25,738 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 104 flow. Second operand 4 states and 92 transitions. [2024-06-27 21:13:25,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 59 transitions, 266 flow [2024-06-27 21:13:25,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 59 transitions, 262 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 21:13:25,741 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 140 flow [2024-06-27 21:13:25,742 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} [2024-06-27 21:13:25,744 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2024-06-27 21:13:25,744 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 140 flow [2024-06-27 21:13:25,744 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) [2024-06-27 21:13:25,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:13:25,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:13:25,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 21:13:25,749 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:13:25,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:13:25,750 INFO L85 PathProgramCache]: Analyzing trace with hash -687913982, now seen corresponding path program 1 times [2024-06-27 21:13:25,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:13:25,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081497666] [2024-06-27 21:13:25,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:13:25,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:13:25,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:13:28,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:13:28,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:13:28,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081497666] [2024-06-27 21:13:28,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081497666] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:13:28,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:13:28,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:13:28,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961741895] [2024-06-27 21:13:28,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:13:28,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:13:28,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:13:28,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:13:28,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:13:28,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 21:13:28,307 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) [2024-06-27 21:13:28,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:13:28,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 21:13:28,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:13:28,979 INFO L124 PetriNetUnfolderBase]: 1391/2116 cut-off events. [2024-06-27 21:13:28,979 INFO L125 PetriNetUnfolderBase]: For 1120/1120 co-relation queries the response was YES. [2024-06-27 21:13:28,982 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 10087 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. [2024-06-27 21:13:28,989 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 59 selfloop transitions, 12 changer transitions 0/77 dead transitions. [2024-06-27 21:13:28,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 77 transitions, 384 flow [2024-06-27 21:13:28,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:13:28,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:13:28,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 128 transitions. [2024-06-27 21:13:28,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49612403100775193 [2024-06-27 21:13:28,992 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 140 flow. Second operand 6 states and 128 transitions. [2024-06-27 21:13:28,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 77 transitions, 384 flow [2024-06-27 21:13:28,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 77 transitions, 364 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-27 21:13:28,994 INFO L231 Difference]: Finished difference. Result has 51 places, 44 transitions, 183 flow [2024-06-27 21:13:28,994 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} [2024-06-27 21:13:28,995 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 7 predicate places. [2024-06-27 21:13:28,995 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 44 transitions, 183 flow [2024-06-27 21:13:28,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:28,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:13:28,996 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:13:28,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 21:13:28,996 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)] === [2024-06-27 21:13:28,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:13:28,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1691449725, now seen corresponding path program 1 times [2024-06-27 21:13:28,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:13:28,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196739307] [2024-06-27 21:13:28,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:13:28,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:13:29,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:13:30,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:13:30,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:13:30,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196739307] [2024-06-27 21:13:30,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196739307] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:13:30,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:13:30,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:13:30,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312360903] [2024-06-27 21:13:30,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:13:30,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:13:30,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:13:30,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:13:30,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:13:30,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:13:30,273 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) [2024-06-27 21:13:30,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:13:30,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:13:30,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:13:31,078 INFO L124 PetriNetUnfolderBase]: 1386/2110 cut-off events. [2024-06-27 21:13:31,078 INFO L125 PetriNetUnfolderBase]: For 2156/2156 co-relation queries the response was YES. [2024-06-27 21:13:31,081 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 10019 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. [2024-06-27 21:13:31,088 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 51 selfloop transitions, 11 changer transitions 0/67 dead transitions. [2024-06-27 21:13:31,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 67 transitions, 387 flow [2024-06-27 21:13:31,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:13:31,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:13:31,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 94 transitions. [2024-06-27 21:13:31,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4372093023255814 [2024-06-27 21:13:31,090 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 183 flow. Second operand 5 states and 94 transitions. [2024-06-27 21:13:31,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 67 transitions, 387 flow [2024-06-27 21:13:31,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 67 transitions, 360 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 21:13:31,093 INFO L231 Difference]: Finished difference. Result has 54 places, 50 transitions, 230 flow [2024-06-27 21:13:31,093 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} [2024-06-27 21:13:31,094 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 10 predicate places. [2024-06-27 21:13:31,094 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 50 transitions, 230 flow [2024-06-27 21:13:31,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:31,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:13:31,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:13:31,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 21:13:31,095 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:13:31,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:13:31,095 INFO L85 PathProgramCache]: Analyzing trace with hash -875908633, now seen corresponding path program 1 times [2024-06-27 21:13:31,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:13:31,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088753673] [2024-06-27 21:13:31,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:13:31,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:13:31,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:13:32,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:13:32,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:13:32,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088753673] [2024-06-27 21:13:32,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088753673] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:13:32,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:13:32,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:13:32,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894986486] [2024-06-27 21:13:32,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:13:32,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:13:32,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:13:32,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:13:32,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:13:32,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:13:32,323 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) [2024-06-27 21:13:32,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:13:32,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:13:32,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:13:33,124 INFO L124 PetriNetUnfolderBase]: 1376/2096 cut-off events. [2024-06-27 21:13:33,124 INFO L125 PetriNetUnfolderBase]: For 3355/3357 co-relation queries the response was YES. [2024-06-27 21:13:33,128 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 9946 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. [2024-06-27 21:13:33,135 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 50 selfloop transitions, 10 changer transitions 0/65 dead transitions. [2024-06-27 21:13:33,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 65 transitions, 386 flow [2024-06-27 21:13:33,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:13:33,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:13:33,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 92 transitions. [2024-06-27 21:13:33,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42790697674418604 [2024-06-27 21:13:33,136 INFO L175 Difference]: Start difference. First operand has 54 places, 50 transitions, 230 flow. Second operand 5 states and 92 transitions. [2024-06-27 21:13:33,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 65 transitions, 386 flow [2024-06-27 21:13:33,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 65 transitions, 372 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-06-27 21:13:33,139 INFO L231 Difference]: Finished difference. Result has 58 places, 50 transitions, 244 flow [2024-06-27 21:13:33,140 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} [2024-06-27 21:13:33,140 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 14 predicate places. [2024-06-27 21:13:33,140 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 50 transitions, 244 flow [2024-06-27 21:13:33,140 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) [2024-06-27 21:13:33,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:13:33,141 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:13:33,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 21:13:33,141 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:13:33,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:13:33,141 INFO L85 PathProgramCache]: Analyzing trace with hash 653065594, now seen corresponding path program 1 times [2024-06-27 21:13:33,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:13:33,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217479075] [2024-06-27 21:13:33,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:13:33,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:13:33,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:13:34,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:13:34,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:13:34,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217479075] [2024-06-27 21:13:34,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217479075] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:13:34,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:13:34,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:13:34,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134015780] [2024-06-27 21:13:34,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:13:34,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:13:34,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:13:34,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:13:34,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:13:34,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:13:34,658 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) [2024-06-27 21:13:34,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:13:34,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:13:34,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:13:35,712 INFO L124 PetriNetUnfolderBase]: 1389/2122 cut-off events. [2024-06-27 21:13:35,713 INFO L125 PetriNetUnfolderBase]: For 4396/4396 co-relation queries the response was YES. [2024-06-27 21:13:35,716 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 10144 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. [2024-06-27 21:13:35,724 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 61 selfloop transitions, 18 changer transitions 0/84 dead transitions. [2024-06-27 21:13:35,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 84 transitions, 526 flow [2024-06-27 21:13:35,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:13:35,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:13:35,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 118 transitions. [2024-06-27 21:13:35,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573643410852713 [2024-06-27 21:13:35,726 INFO L175 Difference]: Start difference. First operand has 58 places, 50 transitions, 244 flow. Second operand 6 states and 118 transitions. [2024-06-27 21:13:35,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 84 transitions, 526 flow [2024-06-27 21:13:35,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 84 transitions, 512 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-27 21:13:35,730 INFO L231 Difference]: Finished difference. Result has 63 places, 56 transitions, 328 flow [2024-06-27 21:13:35,730 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} [2024-06-27 21:13:35,731 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 19 predicate places. [2024-06-27 21:13:35,731 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 56 transitions, 328 flow [2024-06-27 21:13:35,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:35,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:13:35,731 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:13:35,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 21:13:35,732 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:13:35,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:13:35,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1383630904, now seen corresponding path program 2 times [2024-06-27 21:13:35,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:13:35,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491269150] [2024-06-27 21:13:35,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:13:35,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:13:35,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:13:37,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:13:37,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:13:37,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491269150] [2024-06-27 21:13:37,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491269150] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:13:37,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:13:37,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:13:37,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347364292] [2024-06-27 21:13:37,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:13:37,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:13:37,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:13:37,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:13:37,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:13:37,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:13:37,247 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) [2024-06-27 21:13:37,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:13:37,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:13:37,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:13:38,231 INFO L124 PetriNetUnfolderBase]: 1384/2108 cut-off events. [2024-06-27 21:13:38,231 INFO L125 PetriNetUnfolderBase]: For 6466/6466 co-relation queries the response was YES. [2024-06-27 21:13:38,234 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 10025 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. [2024-06-27 21:13:38,242 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 55 selfloop transitions, 21 changer transitions 0/81 dead transitions. [2024-06-27 21:13:38,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 81 transitions, 582 flow [2024-06-27 21:13:38,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:13:38,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:13:38,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 112 transitions. [2024-06-27 21:13:38,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-27 21:13:38,244 INFO L175 Difference]: Start difference. First operand has 63 places, 56 transitions, 328 flow. Second operand 6 states and 112 transitions. [2024-06-27 21:13:38,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 81 transitions, 582 flow [2024-06-27 21:13:38,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 81 transitions, 552 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-27 21:13:38,249 INFO L231 Difference]: Finished difference. Result has 67 places, 59 transitions, 376 flow [2024-06-27 21:13:38,250 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} [2024-06-27 21:13:38,250 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 23 predicate places. [2024-06-27 21:13:38,250 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 59 transitions, 376 flow [2024-06-27 21:13:38,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:38,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:13:38,251 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:13:38,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 21:13:38,251 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:13:38,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:13:38,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1237431846, now seen corresponding path program 1 times [2024-06-27 21:13:38,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:13:38,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261791082] [2024-06-27 21:13:38,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:13:38,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:13:38,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:13:39,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:13:39,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:13:39,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261791082] [2024-06-27 21:13:39,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261791082] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:13:39,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:13:39,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:13:39,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888853800] [2024-06-27 21:13:39,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:13:39,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:13:39,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:13:39,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:13:39,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:13:39,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:13:39,380 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) [2024-06-27 21:13:39,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:13:39,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:13:39,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:13:40,276 INFO L124 PetriNetUnfolderBase]: 1471/2248 cut-off events. [2024-06-27 21:13:40,276 INFO L125 PetriNetUnfolderBase]: For 8387/8389 co-relation queries the response was YES. [2024-06-27 21:13:40,279 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 10770 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. [2024-06-27 21:13:40,286 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 72 selfloop transitions, 34 changer transitions 0/111 dead transitions. [2024-06-27 21:13:40,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 111 transitions, 862 flow [2024-06-27 21:13:40,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:13:40,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:13:40,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-06-27 21:13:40,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4684385382059801 [2024-06-27 21:13:40,287 INFO L175 Difference]: Start difference. First operand has 67 places, 59 transitions, 376 flow. Second operand 7 states and 141 transitions. [2024-06-27 21:13:40,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 111 transitions, 862 flow [2024-06-27 21:13:40,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 111 transitions, 798 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-27 21:13:40,293 INFO L231 Difference]: Finished difference. Result has 73 places, 75 transitions, 562 flow [2024-06-27 21:13:40,293 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} [2024-06-27 21:13:40,293 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 29 predicate places. [2024-06-27 21:13:40,293 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 75 transitions, 562 flow [2024-06-27 21:13:40,294 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) [2024-06-27 21:13:40,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:13:40,294 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:13:40,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 21:13:40,294 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:13:40,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:13:40,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1628069220, now seen corresponding path program 2 times [2024-06-27 21:13:40,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:13:40,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444500556] [2024-06-27 21:13:40,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:13:40,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:13:40,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:13:41,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:13:41,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:13:41,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444500556] [2024-06-27 21:13:41,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444500556] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:13:41,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:13:41,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:13:41,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654090428] [2024-06-27 21:13:41,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:13:41,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:13:41,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:13:41,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:13:41,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:13:41,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:13:41,836 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) [2024-06-27 21:13:41,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:13:41,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:13:41,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:13:42,890 INFO L124 PetriNetUnfolderBase]: 1515/2326 cut-off events. [2024-06-27 21:13:42,891 INFO L125 PetriNetUnfolderBase]: For 10862/10866 co-relation queries the response was YES. [2024-06-27 21:13:42,896 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 11215 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. [2024-06-27 21:13:42,904 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 64 selfloop transitions, 40 changer transitions 0/109 dead transitions. [2024-06-27 21:13:42,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 109 transitions, 950 flow [2024-06-27 21:13:42,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:13:42,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:13:42,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 119 transitions. [2024-06-27 21:13:42,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46124031007751937 [2024-06-27 21:13:42,906 INFO L175 Difference]: Start difference. First operand has 73 places, 75 transitions, 562 flow. Second operand 6 states and 119 transitions. [2024-06-27 21:13:42,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 109 transitions, 950 flow [2024-06-27 21:13:42,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 109 transitions, 900 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 21:13:42,915 INFO L231 Difference]: Finished difference. Result has 76 places, 81 transitions, 679 flow [2024-06-27 21:13:42,915 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} [2024-06-27 21:13:42,916 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 32 predicate places. [2024-06-27 21:13:42,916 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 81 transitions, 679 flow [2024-06-27 21:13:42,916 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) [2024-06-27 21:13:42,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:13:42,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:13:42,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 21:13:42,916 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:13:42,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:13:42,917 INFO L85 PathProgramCache]: Analyzing trace with hash -622749836, now seen corresponding path program 3 times [2024-06-27 21:13:42,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:13:42,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320747458] [2024-06-27 21:13:42,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:13:42,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:13:42,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:13:44,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:13:44,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:13:44,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320747458] [2024-06-27 21:13:44,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320747458] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:13:44,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:13:44,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:13:44,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030521022] [2024-06-27 21:13:44,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:13:44,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:13:44,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:13:44,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:13:44,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:13:44,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:13:44,383 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) [2024-06-27 21:13:44,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:13:44,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:13:44,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:13:45,377 INFO L124 PetriNetUnfolderBase]: 1499/2298 cut-off events. [2024-06-27 21:13:45,377 INFO L125 PetriNetUnfolderBase]: For 12900/12912 co-relation queries the response was YES. [2024-06-27 21:13:45,382 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 11055 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. [2024-06-27 21:13:45,389 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 59 selfloop transitions, 39 changer transitions 0/103 dead transitions. [2024-06-27 21:13:45,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 103 transitions, 941 flow [2024-06-27 21:13:45,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:13:45,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:13:45,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 111 transitions. [2024-06-27 21:13:45,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-27 21:13:45,391 INFO L175 Difference]: Start difference. First operand has 76 places, 81 transitions, 679 flow. Second operand 6 states and 111 transitions. [2024-06-27 21:13:45,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 103 transitions, 941 flow [2024-06-27 21:13:45,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 103 transitions, 866 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-27 21:13:45,399 INFO L231 Difference]: Finished difference. Result has 78 places, 81 transitions, 693 flow [2024-06-27 21:13:45,399 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} [2024-06-27 21:13:45,400 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 34 predicate places. [2024-06-27 21:13:45,400 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 81 transitions, 693 flow [2024-06-27 21:13:45,400 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) [2024-06-27 21:13:45,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:13:45,400 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:13:45,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 21:13:45,401 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:13:45,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:13:45,401 INFO L85 PathProgramCache]: Analyzing trace with hash 44880856, now seen corresponding path program 1 times [2024-06-27 21:13:45,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:13:45,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890765080] [2024-06-27 21:13:45,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:13:45,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:13:45,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:13:47,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:13:47,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:13:47,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890765080] [2024-06-27 21:13:47,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890765080] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:13:47,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:13:47,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:13:47,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755804208] [2024-06-27 21:13:47,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:13:47,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:13:47,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:13:47,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:13:47,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:13:47,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:13:47,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 81 transitions, 693 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:47,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:13:47,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:13:47,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:13:48,226 INFO L124 PetriNetUnfolderBase]: 1491/2291 cut-off events. [2024-06-27 21:13:48,226 INFO L125 PetriNetUnfolderBase]: For 12881/12883 co-relation queries the response was YES. [2024-06-27 21:13:48,230 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 10984 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. [2024-06-27 21:13:48,236 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 87 selfloop transitions, 12 changer transitions 0/104 dead transitions. [2024-06-27 21:13:48,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 104 transitions, 967 flow [2024-06-27 21:13:48,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:13:48,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:13:48,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-27 21:13:48,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-27 21:13:48,237 INFO L175 Difference]: Start difference. First operand has 78 places, 81 transitions, 693 flow. Second operand 6 states and 108 transitions. [2024-06-27 21:13:48,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 104 transitions, 967 flow [2024-06-27 21:13:48,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 104 transitions, 798 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-27 21:13:48,246 INFO L231 Difference]: Finished difference. Result has 76 places, 83 transitions, 577 flow [2024-06-27 21:13:48,246 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} [2024-06-27 21:13:48,247 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 32 predicate places. [2024-06-27 21:13:48,247 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 83 transitions, 577 flow [2024-06-27 21:13:48,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:48,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:13:48,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:13:48,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 21:13:48,248 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:13:48,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:13:48,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1064694529, now seen corresponding path program 1 times [2024-06-27 21:13:48,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:13:48,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970760969] [2024-06-27 21:13:48,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:13:48,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:13:48,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:13:50,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:13:50,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:13:50,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970760969] [2024-06-27 21:13:50,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970760969] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:13:50,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:13:50,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:13:50,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16358931] [2024-06-27 21:13:50,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:13:50,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:13:50,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:13:50,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:13:50,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:13:50,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:13:50,444 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) [2024-06-27 21:13:50,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:13:50,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:13:50,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:13:51,441 INFO L124 PetriNetUnfolderBase]: 1540/2366 cut-off events. [2024-06-27 21:13:51,442 INFO L125 PetriNetUnfolderBase]: For 13307/13307 co-relation queries the response was YES. [2024-06-27 21:13:51,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9441 conditions, 2366 events. 1540/2366 cut-off events. For 13307/13307 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 11429 event pairs, 521 based on Foata normal form. 2/2367 useless extension candidates. Maximal degree in co-relation 9409. Up to 2209 conditions per place. [2024-06-27 21:13:51,453 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 105 selfloop transitions, 19 changer transitions 0/129 dead transitions. [2024-06-27 21:13:51,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 129 transitions, 1029 flow [2024-06-27 21:13:51,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:13:51,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:13:51,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-27 21:13:51,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-27 21:13:51,455 INFO L175 Difference]: Start difference. First operand has 76 places, 83 transitions, 577 flow. Second operand 8 states and 149 transitions. [2024-06-27 21:13:51,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 129 transitions, 1029 flow [2024-06-27 21:13:51,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 129 transitions, 994 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-27 21:13:51,465 INFO L231 Difference]: Finished difference. Result has 81 places, 89 transitions, 650 flow [2024-06-27 21:13:51,465 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} [2024-06-27 21:13:51,466 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 37 predicate places. [2024-06-27 21:13:51,466 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 89 transitions, 650 flow [2024-06-27 21:13:51,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:51,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:13:51,466 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:13:51,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 21:13:51,467 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:13:51,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:13:51,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1064814499, now seen corresponding path program 2 times [2024-06-27 21:13:51,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:13:51,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703868234] [2024-06-27 21:13:51,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:13:51,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:13:51,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:13:53,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:13:53,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:13:53,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703868234] [2024-06-27 21:13:53,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703868234] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:13:53,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:13:53,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:13:53,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084166227] [2024-06-27 21:13:53,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:13:53,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:13:53,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:13:53,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:13:53,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:13:53,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:13:53,501 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) [2024-06-27 21:13:53,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:13:53,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:13:53,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:13:54,686 INFO L124 PetriNetUnfolderBase]: 1553/2393 cut-off events. [2024-06-27 21:13:54,686 INFO L125 PetriNetUnfolderBase]: For 16537/16537 co-relation queries the response was YES. [2024-06-27 21:13:54,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10165 conditions, 2393 events. 1553/2393 cut-off events. For 16537/16537 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 11740 event pairs, 479 based on Foata normal form. 2/2393 useless extension candidates. Maximal degree in co-relation 10131. Up to 1935 conditions per place. [2024-06-27 21:13:54,705 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 79 selfloop transitions, 45 changer transitions 0/129 dead transitions. [2024-06-27 21:13:54,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 129 transitions, 1108 flow [2024-06-27 21:13:54,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:13:54,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:13:54,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-27 21:13:54,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45182724252491696 [2024-06-27 21:13:54,707 INFO L175 Difference]: Start difference. First operand has 81 places, 89 transitions, 650 flow. Second operand 7 states and 136 transitions. [2024-06-27 21:13:54,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 129 transitions, 1108 flow [2024-06-27 21:13:54,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 129 transitions, 1049 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-27 21:13:54,724 INFO L231 Difference]: Finished difference. Result has 83 places, 95 transitions, 791 flow [2024-06-27 21:13:54,724 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} [2024-06-27 21:13:54,725 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 39 predicate places. [2024-06-27 21:13:54,725 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 95 transitions, 791 flow [2024-06-27 21:13:54,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:54,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:13:54,725 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:13:54,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 21:13:54,726 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:13:54,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:13:54,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1382719203, now seen corresponding path program 3 times [2024-06-27 21:13:54,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:13:54,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13991096] [2024-06-27 21:13:54,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:13:54,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:13:54,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:13:56,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:13:56,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:13:56,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13991096] [2024-06-27 21:13:56,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13991096] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:13:56,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:13:56,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:13:56,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64749539] [2024-06-27 21:13:56,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:13:56,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:13:56,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:13:56,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:13:56,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:13:56,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:13:56,818 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) [2024-06-27 21:13:56,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:13:56,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:13:56,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:13:58,008 INFO L124 PetriNetUnfolderBase]: 1548/2374 cut-off events. [2024-06-27 21:13:58,008 INFO L125 PetriNetUnfolderBase]: For 20150/20150 co-relation queries the response was YES. [2024-06-27 21:13:58,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10939 conditions, 2374 events. 1548/2374 cut-off events. For 20150/20150 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 11610 event pairs, 536 based on Foata normal form. 2/2364 useless extension candidates. Maximal degree in co-relation 10904. Up to 1932 conditions per place. [2024-06-27 21:13:58,021 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 71 selfloop transitions, 50 changer transitions 0/126 dead transitions. [2024-06-27 21:13:58,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 126 transitions, 1203 flow [2024-06-27 21:13:58,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:13:58,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:13:58,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-27 21:13:58,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318936877076412 [2024-06-27 21:13:58,023 INFO L175 Difference]: Start difference. First operand has 83 places, 95 transitions, 791 flow. Second operand 7 states and 130 transitions. [2024-06-27 21:13:58,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 126 transitions, 1203 flow [2024-06-27 21:13:58,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 126 transitions, 1142 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-27 21:13:58,037 INFO L231 Difference]: Finished difference. Result has 87 places, 98 transitions, 881 flow [2024-06-27 21:13:58,037 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} [2024-06-27 21:13:58,038 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 43 predicate places. [2024-06-27 21:13:58,038 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 98 transitions, 881 flow [2024-06-27 21:13:58,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:58,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:13:58,038 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:13:58,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 21:13:58,038 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)] === [2024-06-27 21:13:58,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:13:58,039 INFO L85 PathProgramCache]: Analyzing trace with hash -91102148, now seen corresponding path program 1 times [2024-06-27 21:13:58,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:13:58,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531742050] [2024-06-27 21:13:58,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:13:58,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:13:58,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:13:59,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:13:59,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:13:59,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531742050] [2024-06-27 21:13:59,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531742050] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:13:59,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:13:59,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:13:59,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058314343] [2024-06-27 21:13:59,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:13:59,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:13:59,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:13:59,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:13:59,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:13:59,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:13:59,578 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) [2024-06-27 21:13:59,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:13:59,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:13:59,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:14:00,359 INFO L124 PetriNetUnfolderBase]: 1545/2389 cut-off events. [2024-06-27 21:14:00,359 INFO L125 PetriNetUnfolderBase]: For 21643/21643 co-relation queries the response was YES. [2024-06-27 21:14:00,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11064 conditions, 2389 events. 1545/2389 cut-off events. For 21643/21643 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 11755 event pairs, 534 based on Foata normal form. 1/2389 useless extension candidates. Maximal degree in co-relation 11027. Up to 2306 conditions per place. [2024-06-27 21:14:00,371 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 98 selfloop transitions, 8 changer transitions 0/111 dead transitions. [2024-06-27 21:14:00,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 111 transitions, 1139 flow [2024-06-27 21:14:00,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:14:00,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:14:00,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 85 transitions. [2024-06-27 21:14:00,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-27 21:14:00,373 INFO L175 Difference]: Start difference. First operand has 87 places, 98 transitions, 881 flow. Second operand 5 states and 85 transitions. [2024-06-27 21:14:00,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 111 transitions, 1139 flow [2024-06-27 21:14:00,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 111 transitions, 1053 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-27 21:14:00,389 INFO L231 Difference]: Finished difference. Result has 88 places, 101 transitions, 841 flow [2024-06-27 21:14:00,389 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} [2024-06-27 21:14:00,390 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 44 predicate places. [2024-06-27 21:14:00,390 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 101 transitions, 841 flow [2024-06-27 21:14:00,391 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) [2024-06-27 21:14:00,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:14:00,391 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:14:00,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 21:14:00,391 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:14:00,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:14:00,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1354206659, now seen corresponding path program 1 times [2024-06-27 21:14:00,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:14:00,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024330672] [2024-06-27 21:14:00,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:14:00,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:14:00,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:14:02,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:14:02,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:14:02,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024330672] [2024-06-27 21:14:02,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024330672] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:14:02,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:14:02,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:14:02,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242380109] [2024-06-27 21:14:02,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:14:02,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:14:02,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:14:02,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:14:02,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:14:02,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:14:02,585 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) [2024-06-27 21:14:02,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:14:02,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:14:02,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:14:03,696 INFO L124 PetriNetUnfolderBase]: 1535/2372 cut-off events. [2024-06-27 21:14:03,697 INFO L125 PetriNetUnfolderBase]: For 23663/23663 co-relation queries the response was YES. [2024-06-27 21:14:03,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11128 conditions, 2372 events. 1535/2372 cut-off events. For 23663/23663 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 11631 event pairs, 522 based on Foata normal form. 4/2375 useless extension candidates. Maximal degree in co-relation 11089. Up to 2209 conditions per place. [2024-06-27 21:14:03,710 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 115 selfloop transitions, 19 changer transitions 0/139 dead transitions. [2024-06-27 21:14:03,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 139 transitions, 1219 flow [2024-06-27 21:14:03,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:14:03,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:14:03,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-27 21:14:03,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-27 21:14:03,712 INFO L175 Difference]: Start difference. First operand has 88 places, 101 transitions, 841 flow. Second operand 8 states and 147 transitions. [2024-06-27 21:14:03,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 139 transitions, 1219 flow [2024-06-27 21:14:03,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 139 transitions, 1185 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-27 21:14:03,729 INFO L231 Difference]: Finished difference. Result has 93 places, 101 transitions, 853 flow [2024-06-27 21:14:03,729 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} [2024-06-27 21:14:03,730 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 49 predicate places. [2024-06-27 21:14:03,730 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 101 transitions, 853 flow [2024-06-27 21:14:03,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:14:03,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:14:03,730 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:14:03,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 21:14:03,731 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:14:03,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:14:03,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1910097947, now seen corresponding path program 2 times [2024-06-27 21:14:03,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:14:03,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581390956] [2024-06-27 21:14:03,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:14:03,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:14:03,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:14:05,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:14:05,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:14:05,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581390956] [2024-06-27 21:14:05,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581390956] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:14:05,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:14:05,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:14:05,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283824200] [2024-06-27 21:14:05,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:14:05,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:14:05,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:14:05,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:14:05,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:14:05,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:14:05,670 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) [2024-06-27 21:14:05,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:14:05,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:14:05,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:14:06,834 INFO L124 PetriNetUnfolderBase]: 1597/2483 cut-off events. [2024-06-27 21:14:06,834 INFO L125 PetriNetUnfolderBase]: For 27317/27321 co-relation queries the response was YES. [2024-06-27 21:14:06,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11895 conditions, 2483 events. 1597/2483 cut-off events. For 27317/27321 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 12353 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. [2024-06-27 21:14:06,847 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 84 selfloop transitions, 55 changer transitions 0/144 dead transitions. [2024-06-27 21:14:06,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 144 transitions, 1425 flow [2024-06-27 21:14:06,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:14:06,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:14:06,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-27 21:14:06,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-27 21:14:06,850 INFO L175 Difference]: Start difference. First operand has 93 places, 101 transitions, 853 flow. Second operand 7 states and 140 transitions. [2024-06-27 21:14:06,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 144 transitions, 1425 flow [2024-06-27 21:14:06,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 144 transitions, 1387 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 21:14:06,867 INFO L231 Difference]: Finished difference. Result has 93 places, 107 transitions, 1011 flow [2024-06-27 21:14:06,867 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} [2024-06-27 21:14:06,867 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 49 predicate places. [2024-06-27 21:14:06,867 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 107 transitions, 1011 flow [2024-06-27 21:14:06,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:14:06,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:14:06,868 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:14:06,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 21:14:06,868 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:14:06,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:14:06,869 INFO L85 PathProgramCache]: Analyzing trace with hash -723653499, now seen corresponding path program 3 times [2024-06-27 21:14:06,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:14:06,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210008155] [2024-06-27 21:14:06,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:14:06,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:14:06,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:14:09,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:14:09,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:14:09,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210008155] [2024-06-27 21:14:09,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210008155] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:14:09,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:14:09,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:14:09,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571131851] [2024-06-27 21:14:09,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:14:09,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:14:09,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:14:09,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:14:09,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:14:09,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:14:09,162 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) [2024-06-27 21:14:09,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:14:09,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:14:09,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:14:10,579 INFO L124 PetriNetUnfolderBase]: 1623/2520 cut-off events. [2024-06-27 21:14:10,580 INFO L125 PetriNetUnfolderBase]: For 31302/31302 co-relation queries the response was YES. [2024-06-27 21:14:10,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12516 conditions, 2520 events. 1623/2520 cut-off events. For 31302/31302 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 12496 event pairs, 483 based on Foata normal form. 4/2522 useless extension candidates. Maximal degree in co-relation 12475. Up to 1994 conditions per place. [2024-06-27 21:14:10,594 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 88 selfloop transitions, 56 changer transitions 0/149 dead transitions. [2024-06-27 21:14:10,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 149 transitions, 1515 flow [2024-06-27 21:14:10,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:14:10,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:14:10,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-27 21:14:10,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44476744186046513 [2024-06-27 21:14:10,596 INFO L175 Difference]: Start difference. First operand has 93 places, 107 transitions, 1011 flow. Second operand 8 states and 153 transitions. [2024-06-27 21:14:10,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 149 transitions, 1515 flow [2024-06-27 21:14:10,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 149 transitions, 1439 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-27 21:14:10,617 INFO L231 Difference]: Finished difference. Result has 98 places, 110 transitions, 1099 flow [2024-06-27 21:14:10,617 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} [2024-06-27 21:14:10,618 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 54 predicate places. [2024-06-27 21:14:10,618 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 110 transitions, 1099 flow [2024-06-27 21:14:10,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:14:10,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:14:10,618 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:14:10,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 21:14:10,618 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)] === [2024-06-27 21:14:10,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:14:10,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1910090011, now seen corresponding path program 1 times [2024-06-27 21:14:10,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:14:10,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873662840] [2024-06-27 21:14:10,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:14:10,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:14:10,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:14:12,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:14:12,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:14:12,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873662840] [2024-06-27 21:14:12,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873662840] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:14:12,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:14:12,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:14:12,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248001936] [2024-06-27 21:14:12,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:14:12,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:14:12,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:14:12,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:14:12,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:14:12,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:14:12,732 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) [2024-06-27 21:14:12,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:14:12,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:14:12,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:14:13,838 INFO L124 PetriNetUnfolderBase]: 1643/2553 cut-off events. [2024-06-27 21:14:13,838 INFO L125 PetriNetUnfolderBase]: For 35301/35305 co-relation queries the response was YES. [2024-06-27 21:14:13,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12849 conditions, 2553 events. 1643/2553 cut-off events. For 35301/35305 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 12706 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. [2024-06-27 21:14:13,861 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 97 selfloop transitions, 42 changer transitions 0/144 dead transitions. [2024-06-27 21:14:13,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 144 transitions, 1487 flow [2024-06-27 21:14:13,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:14:13,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:14:13,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-27 21:14:13,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-27 21:14:13,863 INFO L175 Difference]: Start difference. First operand has 98 places, 110 transitions, 1099 flow. Second operand 7 states and 133 transitions. [2024-06-27 21:14:13,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 144 transitions, 1487 flow [2024-06-27 21:14:13,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 144 transitions, 1355 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-27 21:14:13,892 INFO L231 Difference]: Finished difference. Result has 99 places, 112 transitions, 1084 flow [2024-06-27 21:14:13,892 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} [2024-06-27 21:14:13,892 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 55 predicate places. [2024-06-27 21:14:13,893 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 112 transitions, 1084 flow [2024-06-27 21:14:13,893 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) [2024-06-27 21:14:13,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:14:13,893 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:14:13,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 21:14:13,893 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:14:13,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:14:13,894 INFO L85 PathProgramCache]: Analyzing trace with hash -85376357, now seen corresponding path program 4 times [2024-06-27 21:14:13,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:14:13,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135136134] [2024-06-27 21:14:13,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:14:13,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:14:13,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:14:16,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:14:16,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:14:16,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135136134] [2024-06-27 21:14:16,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135136134] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:14:16,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:14:16,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:14:16,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693575219] [2024-06-27 21:14:16,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:14:16,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:14:16,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:14:16,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:14:16,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:14:16,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:14:16,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 112 transitions, 1084 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:14:16,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:14:16,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:14:16,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:14:17,566 INFO L124 PetriNetUnfolderBase]: 1633/2518 cut-off events. [2024-06-27 21:14:17,566 INFO L125 PetriNetUnfolderBase]: For 37774/37774 co-relation queries the response was YES. [2024-06-27 21:14:17,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12894 conditions, 2518 events. 1633/2518 cut-off events. For 37774/37774 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 12499 event pairs, 564 based on Foata normal form. 4/2510 useless extension candidates. Maximal degree in co-relation 12851. Up to 2018 conditions per place. [2024-06-27 21:14:17,581 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 82 selfloop transitions, 59 changer transitions 0/146 dead transitions. [2024-06-27 21:14:17,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 146 transitions, 1534 flow [2024-06-27 21:14:17,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:14:17,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:14:17,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-27 21:14:17,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-27 21:14:17,582 INFO L175 Difference]: Start difference. First operand has 99 places, 112 transitions, 1084 flow. Second operand 8 states and 147 transitions. [2024-06-27 21:14:17,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 146 transitions, 1534 flow [2024-06-27 21:14:17,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 146 transitions, 1429 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-27 21:14:17,607 INFO L231 Difference]: Finished difference. Result has 102 places, 112 transitions, 1105 flow [2024-06-27 21:14:17,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=979, 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=1105, PETRI_PLACES=102, PETRI_TRANSITIONS=112} [2024-06-27 21:14:17,608 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 58 predicate places. [2024-06-27 21:14:17,608 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 112 transitions, 1105 flow [2024-06-27 21:14:17,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:14:17,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:14:17,608 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:14:17,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 21:14:17,608 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:14:17,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:14:17,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1549390747, now seen corresponding path program 5 times [2024-06-27 21:14:17,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:14:17,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538617305] [2024-06-27 21:14:17,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:14:17,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:14:17,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:14:19,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:14:19,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:14:19,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538617305] [2024-06-27 21:14:19,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538617305] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:14:19,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:14:19,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:14:19,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459499608] [2024-06-27 21:14:19,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:14:19,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:14:19,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:14:19,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:14:19,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:14:19,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:14:19,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 112 transitions, 1105 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:14:19,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:14:19,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:14:19,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:14:20,752 INFO L124 PetriNetUnfolderBase]: 1623/2509 cut-off events. [2024-06-27 21:14:20,752 INFO L125 PetriNetUnfolderBase]: For 40650/40658 co-relation queries the response was YES. [2024-06-27 21:14:20,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12985 conditions, 2509 events. 1623/2509 cut-off events. For 40650/40658 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 12443 event pairs, 505 based on Foata normal form. 12/2515 useless extension candidates. Maximal degree in co-relation 12941. Up to 2010 conditions per place. [2024-06-27 21:14:20,767 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 79 selfloop transitions, 56 changer transitions 0/140 dead transitions. [2024-06-27 21:14:20,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 140 transitions, 1457 flow [2024-06-27 21:14:20,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:14:20,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:14:20,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-27 21:14:20,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318936877076412 [2024-06-27 21:14:20,769 INFO L175 Difference]: Start difference. First operand has 102 places, 112 transitions, 1105 flow. Second operand 7 states and 130 transitions. [2024-06-27 21:14:20,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 140 transitions, 1457 flow [2024-06-27 21:14:20,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 140 transitions, 1294 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-27 21:14:20,801 INFO L231 Difference]: Finished difference. Result has 101 places, 112 transitions, 1063 flow [2024-06-27 21:14:20,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=942, 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=1063, PETRI_PLACES=101, PETRI_TRANSITIONS=112} [2024-06-27 21:14:20,801 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 57 predicate places. [2024-06-27 21:14:20,801 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 112 transitions, 1063 flow [2024-06-27 21:14:20,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:14:20,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:14:20,802 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:14:20,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 21:14:20,802 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)] === [2024-06-27 21:14:20,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:14:20,802 INFO L85 PathProgramCache]: Analyzing trace with hash 180536249, now seen corresponding path program 2 times [2024-06-27 21:14:20,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:14:20,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404167503] [2024-06-27 21:14:20,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:14:20,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:14:20,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:14:22,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:14:22,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:14:22,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404167503] [2024-06-27 21:14:22,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404167503] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:14:22,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:14:22,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:14:22,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564188205] [2024-06-27 21:14:22,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:14:22,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:14:22,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:14:22,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:14:22,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:14:22,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:14:22,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 112 transitions, 1063 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) [2024-06-27 21:14:22,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:14:22,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:14:22,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:14:24,004 INFO L124 PetriNetUnfolderBase]: 1643/2563 cut-off events. [2024-06-27 21:14:24,004 INFO L125 PetriNetUnfolderBase]: For 43364/43372 co-relation queries the response was YES. [2024-06-27 21:14:24,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13218 conditions, 2563 events. 1643/2563 cut-off events. For 43364/43372 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 12841 event pairs, 496 based on Foata normal form. 12/2571 useless extension candidates. Maximal degree in co-relation 13174. Up to 2236 conditions per place. [2024-06-27 21:14:24,018 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 96 selfloop transitions, 41 changer transitions 0/142 dead transitions. [2024-06-27 21:14:24,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 142 transitions, 1443 flow [2024-06-27 21:14:24,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:14:24,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:14:24,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-27 21:14:24,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4219269102990033 [2024-06-27 21:14:24,020 INFO L175 Difference]: Start difference. First operand has 101 places, 112 transitions, 1063 flow. Second operand 7 states and 127 transitions. [2024-06-27 21:14:24,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 142 transitions, 1443 flow [2024-06-27 21:14:24,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 142 transitions, 1173 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-27 21:14:24,052 INFO L231 Difference]: Finished difference. Result has 98 places, 114 transitions, 911 flow [2024-06-27 21:14:24,052 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} [2024-06-27 21:14:24,053 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 54 predicate places. [2024-06-27 21:14:24,053 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 114 transitions, 911 flow [2024-06-27 21:14:24,053 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) [2024-06-27 21:14:24,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:14:24,053 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:14:24,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 21:14:24,053 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:14:24,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:14:24,054 INFO L85 PathProgramCache]: Analyzing trace with hash 180862679, now seen corresponding path program 3 times [2024-06-27 21:14:24,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:14:24,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678997723] [2024-06-27 21:14:24,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:14:24,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:14:24,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:14:26,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:14:26,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:14:26,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678997723] [2024-06-27 21:14:26,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678997723] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:14:26,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:14:26,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:14:26,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86389697] [2024-06-27 21:14:26,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:14:26,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:14:26,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:14:26,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:14:26,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:14:26,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:14:26,153 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) [2024-06-27 21:14:26,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:14:26,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:14:26,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:14:27,097 INFO L124 PetriNetUnfolderBase]: 1635/2551 cut-off events. [2024-06-27 21:14:27,098 INFO L125 PetriNetUnfolderBase]: For 44708/44716 co-relation queries the response was YES. [2024-06-27 21:14:27,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12997 conditions, 2551 events. 1635/2551 cut-off events. For 44708/44716 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 12788 event pairs, 468 based on Foata normal form. 12/2559 useless extension candidates. Maximal degree in co-relation 12955. Up to 2142 conditions per place. [2024-06-27 21:14:27,112 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 93 selfloop transitions, 46 changer transitions 0/144 dead transitions. [2024-06-27 21:14:27,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 144 transitions, 1297 flow [2024-06-27 21:14:27,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:14:27,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:14:27,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-27 21:14:27,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4219269102990033 [2024-06-27 21:14:27,113 INFO L175 Difference]: Start difference. First operand has 98 places, 114 transitions, 911 flow. Second operand 7 states and 127 transitions. [2024-06-27 21:14:27,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 144 transitions, 1297 flow [2024-06-27 21:14:27,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 144 transitions, 1199 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-27 21:14:27,141 INFO L231 Difference]: Finished difference. Result has 100 places, 116 transitions, 944 flow [2024-06-27 21:14:27,141 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} [2024-06-27 21:14:27,142 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 56 predicate places. [2024-06-27 21:14:27,142 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 116 transitions, 944 flow [2024-06-27 21:14:27,142 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) [2024-06-27 21:14:27,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:14:27,142 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:14:27,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 21:14:27,142 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)] === [2024-06-27 21:14:27,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:14:27,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1470803044, now seen corresponding path program 1 times [2024-06-27 21:14:27,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:14:27,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783606277] [2024-06-27 21:14:27,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:14:27,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:14:27,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:14:28,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:14:28,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:14:28,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783606277] [2024-06-27 21:14:28,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783606277] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:14:28,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:14:28,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:14:28,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880819553] [2024-06-27 21:14:28,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:14:28,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:14:28,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:14:28,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:14:28,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:14:28,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:14:28,961 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) [2024-06-27 21:14:28,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:14:28,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:14:28,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:14:29,908 INFO L124 PetriNetUnfolderBase]: 1657/2570 cut-off events. [2024-06-27 21:14:29,909 INFO L125 PetriNetUnfolderBase]: For 48708/48708 co-relation queries the response was YES. [2024-06-27 21:14:29,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13378 conditions, 2570 events. 1657/2570 cut-off events. For 48708/48708 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 12711 event pairs, 529 based on Foata normal form. 6/2570 useless extension candidates. Maximal degree in co-relation 13335. Up to 2356 conditions per place. [2024-06-27 21:14:29,923 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 116 selfloop transitions, 20 changer transitions 0/141 dead transitions. [2024-06-27 21:14:29,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 141 transitions, 1372 flow [2024-06-27 21:14:29,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:14:29,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:14:29,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-27 21:14:29,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41472868217054265 [2024-06-27 21:14:29,925 INFO L175 Difference]: Start difference. First operand has 100 places, 116 transitions, 944 flow. Second operand 6 states and 107 transitions. [2024-06-27 21:14:29,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 141 transitions, 1372 flow [2024-06-27 21:14:29,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 141 transitions, 1259 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-27 21:14:29,959 INFO L231 Difference]: Finished difference. Result has 102 places, 124 transitions, 950 flow [2024-06-27 21:14:29,959 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} [2024-06-27 21:14:29,959 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 58 predicate places. [2024-06-27 21:14:29,959 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 124 transitions, 950 flow [2024-06-27 21:14:29,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:14:29,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:14:29,960 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:14:29,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 21:14:29,960 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:14:29,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:14:29,960 INFO L85 PathProgramCache]: Analyzing trace with hash 516023988, now seen corresponding path program 1 times [2024-06-27 21:14:29,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:14:29,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154649126] [2024-06-27 21:14:29,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:14:29,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:14:29,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:14:31,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:14:31,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:14:31,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154649126] [2024-06-27 21:14:31,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154649126] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:14:31,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:14:31,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:14:31,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465945125] [2024-06-27 21:14:31,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:14:31,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:14:31,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:14:31,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:14:31,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:14:31,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:14:31,611 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) [2024-06-27 21:14:31,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:14:31,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:14:31,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:14:32,827 INFO L124 PetriNetUnfolderBase]: 1905/2988 cut-off events. [2024-06-27 21:14:32,827 INFO L125 PetriNetUnfolderBase]: For 59635/59635 co-relation queries the response was YES. [2024-06-27 21:14:32,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16047 conditions, 2988 events. 1905/2988 cut-off events. For 59635/59635 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 15562 event pairs, 584 based on Foata normal form. 4/2991 useless extension candidates. Maximal degree in co-relation 16002. Up to 2445 conditions per place. [2024-06-27 21:14:32,846 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 166 selfloop transitions, 34 changer transitions 0/205 dead transitions. [2024-06-27 21:14:32,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 205 transitions, 1773 flow [2024-06-27 21:14:32,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:14:32,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:14:32,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 209 transitions. [2024-06-27 21:14:32,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-27 21:14:32,849 INFO L175 Difference]: Start difference. First operand has 102 places, 124 transitions, 950 flow. Second operand 11 states and 209 transitions. [2024-06-27 21:14:32,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 205 transitions, 1773 flow [2024-06-27 21:14:32,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 205 transitions, 1737 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-27 21:14:32,903 INFO L231 Difference]: Finished difference. Result has 114 places, 140 transitions, 1159 flow [2024-06-27 21:14:32,903 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} [2024-06-27 21:14:32,903 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 70 predicate places. [2024-06-27 21:14:32,903 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 140 transitions, 1159 flow [2024-06-27 21:14:32,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:14:32,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:14:32,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:14:32,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 21:14:32,904 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:14:32,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:14:32,904 INFO L85 PathProgramCache]: Analyzing trace with hash 966405952, now seen corresponding path program 2 times [2024-06-27 21:14:32,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:14:32,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111795538] [2024-06-27 21:14:32,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:14:32,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:14:32,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:14:35,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:14:35,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:14:35,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111795538] [2024-06-27 21:14:35,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111795538] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:14:35,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:14:35,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:14:35,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536249976] [2024-06-27 21:14:35,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:14:35,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:14:35,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:14:35,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:14:35,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:14:35,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:14:35,332 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) [2024-06-27 21:14:35,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:14:35,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:14:35,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:14:36,678 INFO L124 PetriNetUnfolderBase]: 2077/3268 cut-off events. [2024-06-27 21:14:36,679 INFO L125 PetriNetUnfolderBase]: For 75739/75739 co-relation queries the response was YES. [2024-06-27 21:14:36,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18666 conditions, 3268 events. 2077/3268 cut-off events. For 75739/75739 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 17486 event pairs, 488 based on Foata normal form. 4/3271 useless extension candidates. Maximal degree in co-relation 18616. Up to 2411 conditions per place. [2024-06-27 21:14:36,698 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 153 selfloop transitions, 36 changer transitions 0/194 dead transitions. [2024-06-27 21:14:36,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 194 transitions, 1881 flow [2024-06-27 21:14:36,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:14:36,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:14:36,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-27 21:14:36,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-27 21:14:36,700 INFO L175 Difference]: Start difference. First operand has 114 places, 140 transitions, 1159 flow. Second operand 9 states and 171 transitions. [2024-06-27 21:14:36,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 194 transitions, 1881 flow [2024-06-27 21:14:36,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 194 transitions, 1819 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-27 21:14:36,741 INFO L231 Difference]: Finished difference. Result has 119 places, 143 transitions, 1247 flow [2024-06-27 21:14:36,741 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} [2024-06-27 21:14:36,742 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 75 predicate places. [2024-06-27 21:14:36,742 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 143 transitions, 1247 flow [2024-06-27 21:14:36,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:14:36,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:14:36,742 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:14:36,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 21:14:36,742 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:14:36,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:14:36,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1460653692, now seen corresponding path program 3 times [2024-06-27 21:14:36,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:14:36,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847935607] [2024-06-27 21:14:36,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:14:36,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:14:36,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:14:39,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:14:39,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:14:39,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847935607] [2024-06-27 21:14:39,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847935607] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:14:39,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:14:39,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:14:39,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74783796] [2024-06-27 21:14:39,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:14:39,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:14:39,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:14:39,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:14:39,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:14:39,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:14:39,206 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) [2024-06-27 21:14:39,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:14:39,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:14:39,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:14:40,433 INFO L124 PetriNetUnfolderBase]: 2061/3242 cut-off events. [2024-06-27 21:14:40,433 INFO L125 PetriNetUnfolderBase]: For 80516/80516 co-relation queries the response was YES. [2024-06-27 21:14:40,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18791 conditions, 3242 events. 2061/3242 cut-off events. For 80516/80516 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 17392 event pairs, 640 based on Foata normal form. 8/3249 useless extension candidates. Maximal degree in co-relation 18739. Up to 2963 conditions per place. [2024-06-27 21:14:40,454 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 155 selfloop transitions, 30 changer transitions 0/190 dead transitions. [2024-06-27 21:14:40,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 190 transitions, 1837 flow [2024-06-27 21:14:40,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:14:40,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:14:40,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-27 21:14:40,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42118863049095606 [2024-06-27 21:14:40,455 INFO L175 Difference]: Start difference. First operand has 119 places, 143 transitions, 1247 flow. Second operand 9 states and 163 transitions. [2024-06-27 21:14:40,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 190 transitions, 1837 flow [2024-06-27 21:14:40,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 190 transitions, 1755 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-27 21:14:40,505 INFO L231 Difference]: Finished difference. Result has 123 places, 146 transitions, 1307 flow [2024-06-27 21:14:40,505 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} [2024-06-27 21:14:40,506 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 79 predicate places. [2024-06-27 21:14:40,506 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 146 transitions, 1307 flow [2024-06-27 21:14:40,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:14:40,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:14:40,506 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:14:40,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 21:14:40,507 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:14:40,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:14:40,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1819929512, now seen corresponding path program 4 times [2024-06-27 21:14:40,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:14:40,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853749847] [2024-06-27 21:14:40,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:14:40,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:14:40,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:14:42,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:14:42,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:14:42,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853749847] [2024-06-27 21:14:42,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853749847] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:14:42,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:14:42,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:14:42,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18100388] [2024-06-27 21:14:42,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:14:42,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:14:42,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:14:42,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:14:42,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:14:42,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:14:42,906 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) [2024-06-27 21:14:42,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:14:42,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:14:42,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:14:44,413 INFO L124 PetriNetUnfolderBase]: 2081/3286 cut-off events. [2024-06-27 21:14:44,413 INFO L125 PetriNetUnfolderBase]: For 79331/79331 co-relation queries the response was YES. [2024-06-27 21:14:44,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19021 conditions, 3286 events. 2081/3286 cut-off events. For 79331/79331 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 17705 event pairs, 537 based on Foata normal form. 4/3288 useless extension candidates. Maximal degree in co-relation 18967. Up to 2686 conditions per place. [2024-06-27 21:14:44,431 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 114 selfloop transitions, 66 changer transitions 0/185 dead transitions. [2024-06-27 21:14:44,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 185 transitions, 1838 flow [2024-06-27 21:14:44,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:14:44,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:14:44,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-27 21:14:44,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-27 21:14:44,433 INFO L175 Difference]: Start difference. First operand has 123 places, 146 transitions, 1307 flow. Second operand 8 states and 150 transitions. [2024-06-27 21:14:44,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 185 transitions, 1838 flow [2024-06-27 21:14:44,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 185 transitions, 1737 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-27 21:14:44,491 INFO L231 Difference]: Finished difference. Result has 124 places, 148 transitions, 1391 flow [2024-06-27 21:14:44,491 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} [2024-06-27 21:14:44,491 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 80 predicate places. [2024-06-27 21:14:44,491 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 148 transitions, 1391 flow [2024-06-27 21:14:44,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:14:44,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:14:44,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:14:44,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 21:14:44,492 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:14:44,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:14:44,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1662138565, now seen corresponding path program 1 times [2024-06-27 21:14:44,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:14:44,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066141009] [2024-06-27 21:14:44,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:14:44,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:14:44,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:14:46,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:14:46,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:14:46,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066141009] [2024-06-27 21:14:46,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066141009] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:14:46,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:14:46,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:14:46,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551894929] [2024-06-27 21:14:46,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:14:46,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:14:46,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:14:46,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:14:46,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:14:46,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:14:46,230 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) [2024-06-27 21:14:46,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:14:46,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:14:46,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:14:47,321 INFO L124 PetriNetUnfolderBase]: 2091/3305 cut-off events. [2024-06-27 21:14:47,321 INFO L125 PetriNetUnfolderBase]: For 84708/84708 co-relation queries the response was YES. [2024-06-27 21:14:47,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19417 conditions, 3305 events. 2091/3305 cut-off events. For 84708/84708 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 17856 event pairs, 606 based on Foata normal form. 2/3306 useless extension candidates. Maximal degree in co-relation 19362. Up to 3039 conditions per place. [2024-06-27 21:14:47,342 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 145 selfloop transitions, 26 changer transitions 0/176 dead transitions. [2024-06-27 21:14:47,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 176 transitions, 1915 flow [2024-06-27 21:14:47,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:14:47,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:14:47,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 116 transitions. [2024-06-27 21:14:47,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496124031007752 [2024-06-27 21:14:47,343 INFO L175 Difference]: Start difference. First operand has 124 places, 148 transitions, 1391 flow. Second operand 6 states and 116 transitions. [2024-06-27 21:14:47,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 176 transitions, 1915 flow [2024-06-27 21:14:47,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 176 transitions, 1748 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-27 21:14:47,399 INFO L231 Difference]: Finished difference. Result has 124 places, 151 transitions, 1313 flow [2024-06-27 21:14:47,399 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} [2024-06-27 21:14:47,400 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 80 predicate places. [2024-06-27 21:14:47,400 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 151 transitions, 1313 flow [2024-06-27 21:14:47,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:14:47,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:14:47,400 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:14:47,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 21:14:47,401 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:14:47,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:14:47,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1595601434, now seen corresponding path program 5 times [2024-06-27 21:14:47,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:14:47,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158022750] [2024-06-27 21:14:47,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:14:47,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:14:47,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:14:49,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:14:49,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:14:49,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158022750] [2024-06-27 21:14:49,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158022750] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:14:49,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:14:49,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:14:49,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627045385] [2024-06-27 21:14:49,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:14:49,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:14:49,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:14:49,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:14:49,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:14:49,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:14:49,776 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) [2024-06-27 21:14:49,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:14:49,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:14:49,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:14:51,138 INFO L124 PetriNetUnfolderBase]: 2083/3261 cut-off events. [2024-06-27 21:14:51,139 INFO L125 PetriNetUnfolderBase]: For 87415/87415 co-relation queries the response was YES. [2024-06-27 21:14:51,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19040 conditions, 3261 events. 2083/3261 cut-off events. For 87415/87415 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 17436 event pairs, 627 based on Foata normal form. 4/3250 useless extension candidates. Maximal degree in co-relation 18984. Up to 2688 conditions per place. [2024-06-27 21:14:51,162 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 112 selfloop transitions, 69 changer transitions 0/186 dead transitions. [2024-06-27 21:14:51,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 186 transitions, 1838 flow [2024-06-27 21:14:51,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:14:51,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:14:51,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-27 21:14:51,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-27 21:14:51,164 INFO L175 Difference]: Start difference. First operand has 124 places, 151 transitions, 1313 flow. Second operand 8 states and 144 transitions. [2024-06-27 21:14:51,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 186 transitions, 1838 flow [2024-06-27 21:14:51,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 186 transitions, 1797 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-27 21:14:51,221 INFO L231 Difference]: Finished difference. Result has 129 places, 153 transitions, 1467 flow [2024-06-27 21:14:51,222 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} [2024-06-27 21:14:51,222 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 85 predicate places. [2024-06-27 21:14:51,222 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 153 transitions, 1467 flow [2024-06-27 21:14:51,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:14:51,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:14:51,222 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:14:51,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 21:14:51,222 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)] === [2024-06-27 21:14:51,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:14:51,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1649758405, now seen corresponding path program 2 times [2024-06-27 21:14:51,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:14:51,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763377584] [2024-06-27 21:14:51,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:14:51,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:14:51,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:14:53,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:14:53,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:14:53,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763377584] [2024-06-27 21:14:53,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763377584] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:14:53,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:14:53,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:14:53,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735799413] [2024-06-27 21:14:53,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:14:53,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:14:53,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:14:53,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:14:53,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:14:53,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:14:53,122 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) [2024-06-27 21:14:53,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:14:53,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:14:53,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:14:54,243 INFO L124 PetriNetUnfolderBase]: 2057/3230 cut-off events. [2024-06-27 21:14:54,243 INFO L125 PetriNetUnfolderBase]: For 93489/93489 co-relation queries the response was YES. [2024-06-27 21:14:54,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19264 conditions, 3230 events. 2057/3230 cut-off events. For 93489/93489 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 17184 event pairs, 587 based on Foata normal form. 6/3228 useless extension candidates. Maximal degree in co-relation 19207. Up to 3008 conditions per place. [2024-06-27 21:14:54,262 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 139 selfloop transitions, 25 changer transitions 0/169 dead transitions. [2024-06-27 21:14:54,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 169 transitions, 1861 flow [2024-06-27 21:14:54,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:14:54,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:14:54,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-27 21:14:54,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4108527131782946 [2024-06-27 21:14:54,264 INFO L175 Difference]: Start difference. First operand has 129 places, 153 transitions, 1467 flow. Second operand 6 states and 106 transitions. [2024-06-27 21:14:54,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 169 transitions, 1861 flow [2024-06-27 21:14:54,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 169 transitions, 1672 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-27 21:14:54,324 INFO L231 Difference]: Finished difference. Result has 129 places, 153 transitions, 1336 flow [2024-06-27 21:14:54,324 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} [2024-06-27 21:14:54,325 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 85 predicate places. [2024-06-27 21:14:54,325 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 153 transitions, 1336 flow [2024-06-27 21:14:54,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:14:54,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:14:54,325 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:14:54,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 21:14:54,325 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)] === [2024-06-27 21:14:54,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:14:54,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1649958851, now seen corresponding path program 1 times [2024-06-27 21:14:54,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:14:54,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110730714] [2024-06-27 21:14:54,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:14:54,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:14:54,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:14:56,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:14:56,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:14:56,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110730714] [2024-06-27 21:14:56,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110730714] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:14:56,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:14:56,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:14:56,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420969362] [2024-06-27 21:14:56,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:14:56,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:14:56,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:14:56,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:14:56,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:14:56,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:14:56,151 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) [2024-06-27 21:14:56,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:14:56,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:14:56,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:14:57,193 INFO L124 PetriNetUnfolderBase]: 2062/3266 cut-off events. [2024-06-27 21:14:57,193 INFO L125 PetriNetUnfolderBase]: For 94214/94214 co-relation queries the response was YES. [2024-06-27 21:14:57,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19079 conditions, 3266 events. 2062/3266 cut-off events. For 94214/94214 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 17684 event pairs, 645 based on Foata normal form. 1/3265 useless extension candidates. Maximal degree in co-relation 19021. Up to 3079 conditions per place. [2024-06-27 21:14:57,214 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 154 selfloop transitions, 21 changer transitions 0/180 dead transitions. [2024-06-27 21:14:57,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 180 transitions, 1964 flow [2024-06-27 21:14:57,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:14:57,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:14:57,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-27 21:14:57,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41472868217054265 [2024-06-27 21:14:57,215 INFO L175 Difference]: Start difference. First operand has 129 places, 153 transitions, 1336 flow. Second operand 6 states and 107 transitions. [2024-06-27 21:14:57,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 180 transitions, 1964 flow [2024-06-27 21:14:57,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 180 transitions, 1889 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 21:14:57,286 INFO L231 Difference]: Finished difference. Result has 130 places, 162 transitions, 1435 flow [2024-06-27 21:14:57,286 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} [2024-06-27 21:14:57,287 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 86 predicate places. [2024-06-27 21:14:57,287 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 162 transitions, 1435 flow [2024-06-27 21:14:57,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:14:57,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:14:57,287 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:14:57,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 21:14:57,287 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)] === [2024-06-27 21:14:57,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:14:57,288 INFO L85 PathProgramCache]: Analyzing trace with hash -333287171, now seen corresponding path program 2 times [2024-06-27 21:14:57,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:14:57,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426446871] [2024-06-27 21:14:57,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:14:57,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:14:57,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:14:59,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:14:59,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:14:59,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426446871] [2024-06-27 21:14:59,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426446871] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:14:59,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:14:59,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:14:59,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711571324] [2024-06-27 21:14:59,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:14:59,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:14:59,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:14:59,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:14:59,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:14:59,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:14:59,077 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) [2024-06-27 21:14:59,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:14:59,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:14:59,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:15:00,034 INFO L124 PetriNetUnfolderBase]: 2075/3273 cut-off events. [2024-06-27 21:15:00,034 INFO L125 PetriNetUnfolderBase]: For 100494/100494 co-relation queries the response was YES. [2024-06-27 21:15:00,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19702 conditions, 3273 events. 2075/3273 cut-off events. For 100494/100494 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 17648 event pairs, 669 based on Foata normal form. 1/3273 useless extension candidates. Maximal degree in co-relation 19642. Up to 3141 conditions per place. [2024-06-27 21:15:00,058 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 160 selfloop transitions, 14 changer transitions 0/179 dead transitions. [2024-06-27 21:15:00,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 179 transitions, 1918 flow [2024-06-27 21:15:00,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:15:00,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:15:00,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-27 21:15:00,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3687707641196013 [2024-06-27 21:15:00,059 INFO L175 Difference]: Start difference. First operand has 130 places, 162 transitions, 1435 flow. Second operand 7 states and 111 transitions. [2024-06-27 21:15:00,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 179 transitions, 1918 flow [2024-06-27 21:15:00,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 179 transitions, 1846 flow, removed 35 selfloop flow, removed 1 redundant places. [2024-06-27 21:15:00,160 INFO L231 Difference]: Finished difference. Result has 137 places, 165 transitions, 1440 flow [2024-06-27 21:15:00,160 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} [2024-06-27 21:15:00,160 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 93 predicate places. [2024-06-27 21:15:00,161 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 165 transitions, 1440 flow [2024-06-27 21:15:00,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:00,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:15:00,161 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:15:00,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 21:15:00,161 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:15:00,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:15:00,161 INFO L85 PathProgramCache]: Analyzing trace with hash -2059974936, now seen corresponding path program 1 times [2024-06-27 21:15:00,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:15:00,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311990174] [2024-06-27 21:15:00,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:15:00,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:15:00,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:15:02,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:15:02,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:15:02,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311990174] [2024-06-27 21:15:02,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311990174] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:15:02,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:15:02,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:15:02,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976849042] [2024-06-27 21:15:02,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:15:02,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:15:02,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:15:02,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:15:02,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:15:02,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:15:02,622 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) [2024-06-27 21:15:02,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:15:02,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:15:02,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:15:04,036 INFO L124 PetriNetUnfolderBase]: 2211/3507 cut-off events. [2024-06-27 21:15:04,036 INFO L125 PetriNetUnfolderBase]: For 121872/121872 co-relation queries the response was YES. [2024-06-27 21:15:04,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20731 conditions, 3507 events. 2211/3507 cut-off events. For 121872/121872 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 19243 event pairs, 474 based on Foata normal form. 32/3538 useless extension candidates. Maximal degree in co-relation 20667. Up to 2462 conditions per place. [2024-06-27 21:15:04,058 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 176 selfloop transitions, 39 changer transitions 0/220 dead transitions. [2024-06-27 21:15:04,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 220 transitions, 2213 flow [2024-06-27 21:15:04,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:15:04,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:15:04,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-27 21:15:04,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470284237726098 [2024-06-27 21:15:04,060 INFO L175 Difference]: Start difference. First operand has 137 places, 165 transitions, 1440 flow. Second operand 9 states and 173 transitions. [2024-06-27 21:15:04,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 220 transitions, 2213 flow [2024-06-27 21:15:04,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 220 transitions, 2175 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-27 21:15:04,129 INFO L231 Difference]: Finished difference. Result has 141 places, 167 transitions, 1538 flow [2024-06-27 21:15:04,129 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} [2024-06-27 21:15:04,129 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 97 predicate places. [2024-06-27 21:15:04,129 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 167 transitions, 1538 flow [2024-06-27 21:15:04,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:04,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:15:04,129 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:15:04,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 21:15:04,130 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:15:04,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:15:04,130 INFO L85 PathProgramCache]: Analyzing trace with hash 147985612, now seen corresponding path program 2 times [2024-06-27 21:15:04,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:15:04,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524997673] [2024-06-27 21:15:04,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:15:04,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:15:04,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:15:06,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:15:06,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:15:06,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524997673] [2024-06-27 21:15:06,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524997673] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:15:06,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:15:06,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:15:06,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509958359] [2024-06-27 21:15:06,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:15:06,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:15:06,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:15:06,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:15:06,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:15:06,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:15:06,613 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) [2024-06-27 21:15:06,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:15:06,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:15:06,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:15:07,914 INFO L124 PetriNetUnfolderBase]: 2139/3390 cut-off events. [2024-06-27 21:15:07,914 INFO L125 PetriNetUnfolderBase]: For 114492/114492 co-relation queries the response was YES. [2024-06-27 21:15:07,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19529 conditions, 3390 events. 2139/3390 cut-off events. For 114492/114492 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 18443 event pairs, 604 based on Foata normal form. 40/3429 useless extension candidates. Maximal degree in co-relation 19464. Up to 2858 conditions per place. [2024-06-27 21:15:07,939 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 181 selfloop transitions, 29 changer transitions 0/215 dead transitions. [2024-06-27 21:15:07,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 215 transitions, 2129 flow [2024-06-27 21:15:07,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:15:07,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:15:07,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-27 21:15:07,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289405684754522 [2024-06-27 21:15:07,940 INFO L175 Difference]: Start difference. First operand has 141 places, 167 transitions, 1538 flow. Second operand 9 states and 166 transitions. [2024-06-27 21:15:07,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 215 transitions, 2129 flow [2024-06-27 21:15:08,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 215 transitions, 2019 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-27 21:15:08,044 INFO L231 Difference]: Finished difference. Result has 144 places, 167 transitions, 1496 flow [2024-06-27 21:15:08,044 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} [2024-06-27 21:15:08,044 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 100 predicate places. [2024-06-27 21:15:08,044 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 167 transitions, 1496 flow [2024-06-27 21:15:08,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:08,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:15:08,044 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:15:08,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 21:15:08,045 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)] === [2024-06-27 21:15:08,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:15:08,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1653054684, now seen corresponding path program 3 times [2024-06-27 21:15:08,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:15:08,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038439268] [2024-06-27 21:15:08,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:15:08,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:15:08,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:15:10,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:15:10,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:15:10,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038439268] [2024-06-27 21:15:10,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038439268] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:15:10,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:15:10,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:15:10,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884542848] [2024-06-27 21:15:10,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:15:10,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:15:10,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:15:10,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:15:10,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:15:10,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:15:10,413 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) [2024-06-27 21:15:10,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:15:10,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:15:10,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:15:11,899 INFO L124 PetriNetUnfolderBase]: 2227/3561 cut-off events. [2024-06-27 21:15:11,899 INFO L125 PetriNetUnfolderBase]: For 111171/111175 co-relation queries the response was YES. [2024-06-27 21:15:11,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19955 conditions, 3561 events. 2227/3561 cut-off events. For 111171/111175 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 19737 event pairs, 503 based on Foata normal form. 24/3583 useless extension candidates. Maximal degree in co-relation 19889. Up to 2821 conditions per place. [2024-06-27 21:15:11,922 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 140 selfloop transitions, 66 changer transitions 0/211 dead transitions. [2024-06-27 21:15:11,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 211 transitions, 2087 flow [2024-06-27 21:15:11,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:15:11,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:15:11,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-27 21:15:11,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45058139534883723 [2024-06-27 21:15:11,923 INFO L175 Difference]: Start difference. First operand has 144 places, 167 transitions, 1496 flow. Second operand 8 states and 155 transitions. [2024-06-27 21:15:11,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 211 transitions, 2087 flow [2024-06-27 21:15:12,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 211 transitions, 1988 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-27 21:15:12,005 INFO L231 Difference]: Finished difference. Result has 143 places, 168 transitions, 1566 flow [2024-06-27 21:15:12,006 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} [2024-06-27 21:15:12,006 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 99 predicate places. [2024-06-27 21:15:12,006 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 168 transitions, 1566 flow [2024-06-27 21:15:12,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:12,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:15:12,006 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:15:12,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 21:15:12,007 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)] === [2024-06-27 21:15:12,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:15:12,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1852356474, now seen corresponding path program 4 times [2024-06-27 21:15:12,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:15:12,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525353212] [2024-06-27 21:15:12,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:15:12,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:15:12,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:15:14,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:15:14,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:15:14,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525353212] [2024-06-27 21:15:14,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525353212] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:15:14,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:15:14,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:15:14,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976550899] [2024-06-27 21:15:14,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:15:14,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:15:14,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:15:14,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:15:14,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:15:14,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:15:14,718 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) [2024-06-27 21:15:14,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:15:14,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:15:14,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:15:16,397 INFO L124 PetriNetUnfolderBase]: 2315/3709 cut-off events. [2024-06-27 21:15:16,397 INFO L125 PetriNetUnfolderBase]: For 119330/119330 co-relation queries the response was YES. [2024-06-27 21:15:16,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20840 conditions, 3709 events. 2315/3709 cut-off events. For 119330/119330 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 20867 event pairs, 545 based on Foata normal form. 20/3727 useless extension candidates. Maximal degree in co-relation 20773. Up to 2969 conditions per place. [2024-06-27 21:15:16,420 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 146 selfloop transitions, 65 changer transitions 0/216 dead transitions. [2024-06-27 21:15:16,420 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 216 transitions, 2185 flow [2024-06-27 21:15:16,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:15:16,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:15:16,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-27 21:15:16,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392764857881137 [2024-06-27 21:15:16,421 INFO L175 Difference]: Start difference. First operand has 143 places, 168 transitions, 1566 flow. Second operand 9 states and 170 transitions. [2024-06-27 21:15:16,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 216 transitions, 2185 flow [2024-06-27 21:15:16,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 216 transitions, 2034 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-27 21:15:16,499 INFO L231 Difference]: Finished difference. Result has 146 places, 169 transitions, 1584 flow [2024-06-27 21:15:16,499 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} [2024-06-27 21:15:16,499 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 102 predicate places. [2024-06-27 21:15:16,499 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 169 transitions, 1584 flow [2024-06-27 21:15:16,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:16,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:15:16,500 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:15:16,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 21:15:16,500 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)] === [2024-06-27 21:15:16,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:15:16,500 INFO L85 PathProgramCache]: Analyzing trace with hash -738560516, now seen corresponding path program 5 times [2024-06-27 21:15:16,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:15:16,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958364230] [2024-06-27 21:15:16,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:15:16,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:15:16,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:15:19,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:15:19,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:15:19,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958364230] [2024-06-27 21:15:19,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958364230] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:15:19,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:15:19,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:15:19,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400256606] [2024-06-27 21:15:19,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:15:19,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:15:19,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:15:19,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:15:19,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:15:19,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:15:19,329 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) [2024-06-27 21:15:19,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:15:19,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:15:19,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:15:21,057 INFO L124 PetriNetUnfolderBase]: 2383/3825 cut-off events. [2024-06-27 21:15:21,058 INFO L125 PetriNetUnfolderBase]: For 123926/123926 co-relation queries the response was YES. [2024-06-27 21:15:21,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21375 conditions, 3825 events. 2383/3825 cut-off events. For 123926/123926 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 21716 event pairs, 529 based on Foata normal form. 16/3839 useless extension candidates. Maximal degree in co-relation 21307. Up to 2951 conditions per place. [2024-06-27 21:15:21,081 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 153 selfloop transitions, 68 changer transitions 0/226 dead transitions. [2024-06-27 21:15:21,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 226 transitions, 2255 flow [2024-06-27 21:15:21,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:15:21,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:15:21,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-27 21:15:21,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43953488372093025 [2024-06-27 21:15:21,082 INFO L175 Difference]: Start difference. First operand has 146 places, 169 transitions, 1584 flow. Second operand 10 states and 189 transitions. [2024-06-27 21:15:21,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 226 transitions, 2255 flow [2024-06-27 21:15:21,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 226 transitions, 2104 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-27 21:15:21,179 INFO L231 Difference]: Finished difference. Result has 149 places, 170 transitions, 1609 flow [2024-06-27 21:15:21,179 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} [2024-06-27 21:15:21,179 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 105 predicate places. [2024-06-27 21:15:21,179 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 170 transitions, 1609 flow [2024-06-27 21:15:21,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:21,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:15:21,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:15:21,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 21:15:21,180 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)] === [2024-06-27 21:15:21,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:15:21,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1645430172, now seen corresponding path program 1 times [2024-06-27 21:15:21,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:15:21,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680489404] [2024-06-27 21:15:21,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:15:21,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:15:21,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:15:23,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:15:23,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:15:23,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680489404] [2024-06-27 21:15:23,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680489404] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:15:23,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:15:23,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:15:23,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607562660] [2024-06-27 21:15:23,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:15:23,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:15:23,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:15:23,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:15:23,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:15:23,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:15:23,826 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) [2024-06-27 21:15:23,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:15:23,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:15:23,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:15:25,328 INFO L124 PetriNetUnfolderBase]: 2555/4113 cut-off events. [2024-06-27 21:15:25,329 INFO L125 PetriNetUnfolderBase]: For 142272/142276 co-relation queries the response was YES. [2024-06-27 21:15:25,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23498 conditions, 4113 events. 2555/4113 cut-off events. For 142272/142276 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 23900 event pairs, 581 based on Foata normal form. 16/4127 useless extension candidates. Maximal degree in co-relation 23429. Up to 2627 conditions per place. [2024-06-27 21:15:25,354 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 144 selfloop transitions, 70 changer transitions 0/219 dead transitions. [2024-06-27 21:15:25,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 219 transitions, 2402 flow [2024-06-27 21:15:25,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:15:25,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:15:25,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-27 21:15:25,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45930232558139533 [2024-06-27 21:15:25,356 INFO L175 Difference]: Start difference. First operand has 149 places, 170 transitions, 1609 flow. Second operand 8 states and 158 transitions. [2024-06-27 21:15:25,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 219 transitions, 2402 flow [2024-06-27 21:15:25,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 219 transitions, 2238 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-27 21:15:25,459 INFO L231 Difference]: Finished difference. Result has 149 places, 172 transitions, 1661 flow [2024-06-27 21:15:25,459 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} [2024-06-27 21:15:25,459 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 105 predicate places. [2024-06-27 21:15:25,459 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 172 transitions, 1661 flow [2024-06-27 21:15:25,459 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) [2024-06-27 21:15:25,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:15:25,459 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:15:25,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 21:15:25,460 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)] === [2024-06-27 21:15:25,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:15:25,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1393636918, now seen corresponding path program 6 times [2024-06-27 21:15:25,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:15:25,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347167562] [2024-06-27 21:15:25,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:15:25,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:15:25,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:15:28,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:15:28,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:15:28,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347167562] [2024-06-27 21:15:28,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347167562] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:15:28,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:15:28,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:15:28,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668063642] [2024-06-27 21:15:28,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:15:28,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:15:28,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:15:28,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:15:28,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:15:28,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:15:28,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 172 transitions, 1661 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:28,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:15:28,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:15:28,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:15:29,941 INFO L124 PetriNetUnfolderBase]: 2519/4036 cut-off events. [2024-06-27 21:15:29,941 INFO L125 PetriNetUnfolderBase]: For 140908/140908 co-relation queries the response was YES. [2024-06-27 21:15:29,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22558 conditions, 4036 events. 2519/4036 cut-off events. For 140908/140908 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 23244 event pairs, 674 based on Foata normal form. 20/4043 useless extension candidates. Maximal degree in co-relation 22488. Up to 3317 conditions per place. [2024-06-27 21:15:29,971 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 142 selfloop transitions, 68 changer transitions 0/215 dead transitions. [2024-06-27 21:15:29,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 215 transitions, 2236 flow [2024-06-27 21:15:29,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:15:29,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:15:29,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-27 21:15:29,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42377260981912146 [2024-06-27 21:15:29,972 INFO L175 Difference]: Start difference. First operand has 149 places, 172 transitions, 1661 flow. Second operand 9 states and 164 transitions. [2024-06-27 21:15:29,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 215 transitions, 2236 flow [2024-06-27 21:15:30,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 215 transitions, 2115 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-27 21:15:30,111 INFO L231 Difference]: Finished difference. Result has 154 places, 172 transitions, 1683 flow [2024-06-27 21:15:30,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1540, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1683, PETRI_PLACES=154, PETRI_TRANSITIONS=172} [2024-06-27 21:15:30,111 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 110 predicate places. [2024-06-27 21:15:30,112 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 172 transitions, 1683 flow [2024-06-27 21:15:30,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:30,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:15:30,112 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:15:30,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 21:15:30,112 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:15:30,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:15:30,113 INFO L85 PathProgramCache]: Analyzing trace with hash -517055620, now seen corresponding path program 7 times [2024-06-27 21:15:30,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:15:30,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447357632] [2024-06-27 21:15:30,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:15:30,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:15:30,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:15:32,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:15:32,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:15:32,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447357632] [2024-06-27 21:15:32,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447357632] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:15:32,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:15:32,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:15:32,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406006240] [2024-06-27 21:15:32,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:15:32,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:15:32,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:15:32,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:15:32,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:15:32,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:15:32,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 172 transitions, 1683 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:32,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:15:32,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:15:32,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:15:34,550 INFO L124 PetriNetUnfolderBase]: 2587/4141 cut-off events. [2024-06-27 21:15:34,550 INFO L125 PetriNetUnfolderBase]: For 143714/143714 co-relation queries the response was YES. [2024-06-27 21:15:34,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23233 conditions, 4141 events. 2587/4141 cut-off events. For 143714/143714 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 23975 event pairs, 658 based on Foata normal form. 16/4143 useless extension candidates. Maximal degree in co-relation 23161. Up to 3299 conditions per place. [2024-06-27 21:15:34,633 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 149 selfloop transitions, 71 changer transitions 0/225 dead transitions. [2024-06-27 21:15:34,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 225 transitions, 2344 flow [2024-06-27 21:15:34,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:15:34,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:15:34,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 183 transitions. [2024-06-27 21:15:34,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255813953488372 [2024-06-27 21:15:34,635 INFO L175 Difference]: Start difference. First operand has 154 places, 172 transitions, 1683 flow. Second operand 10 states and 183 transitions. [2024-06-27 21:15:34,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 225 transitions, 2344 flow [2024-06-27 21:15:34,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 225 transitions, 2183 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-27 21:15:34,777 INFO L231 Difference]: Finished difference. Result has 156 places, 173 transitions, 1708 flow [2024-06-27 21:15:34,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1522, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1708, PETRI_PLACES=156, PETRI_TRANSITIONS=173} [2024-06-27 21:15:34,778 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 112 predicate places. [2024-06-27 21:15:34,778 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 173 transitions, 1708 flow [2024-06-27 21:15:34,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:34,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:15:34,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:15:34,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 21:15:34,779 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)] === [2024-06-27 21:15:34,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:15:34,779 INFO L85 PathProgramCache]: Analyzing trace with hash 478572104, now seen corresponding path program 8 times [2024-06-27 21:15:34,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:15:34,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872322604] [2024-06-27 21:15:34,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:15:34,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:15:34,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:15:37,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:15:37,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:15:37,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872322604] [2024-06-27 21:15:37,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872322604] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:15:37,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:15:37,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:15:37,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778119241] [2024-06-27 21:15:37,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:15:37,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:15:37,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:15:37,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:15:37,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:15:37,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:15:37,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 173 transitions, 1708 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:37,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:15:37,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:15:37,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:15:38,772 INFO L124 PetriNetUnfolderBase]: 2619/4229 cut-off events. [2024-06-27 21:15:38,773 INFO L125 PetriNetUnfolderBase]: For 149591/149599 co-relation queries the response was YES. [2024-06-27 21:15:38,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23368 conditions, 4229 events. 2619/4229 cut-off events. For 149591/149599 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 24871 event pairs, 636 based on Foata normal form. 28/4249 useless extension candidates. Maximal degree in co-relation 23295. Up to 3493 conditions per place. [2024-06-27 21:15:38,801 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 144 selfloop transitions, 64 changer transitions 0/213 dead transitions. [2024-06-27 21:15:38,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 213 transitions, 2301 flow [2024-06-27 21:15:38,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:15:38,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:15:38,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-27 21:15:38,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-27 21:15:38,803 INFO L175 Difference]: Start difference. First operand has 156 places, 173 transitions, 1708 flow. Second operand 8 states and 149 transitions. [2024-06-27 21:15:38,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 213 transitions, 2301 flow [2024-06-27 21:15:38,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 213 transitions, 2127 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-27 21:15:38,953 INFO L231 Difference]: Finished difference. Result has 156 places, 174 transitions, 1709 flow [2024-06-27 21:15:38,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1534, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1709, PETRI_PLACES=156, PETRI_TRANSITIONS=174} [2024-06-27 21:15:38,953 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 112 predicate places. [2024-06-27 21:15:38,953 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 174 transitions, 1709 flow [2024-06-27 21:15:38,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:38,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:15:38,953 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:15:38,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 21:15:38,953 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)] === [2024-06-27 21:15:38,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:15:38,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1696678456, now seen corresponding path program 2 times [2024-06-27 21:15:38,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:15:38,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886234060] [2024-06-27 21:15:38,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:15:38,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:15:38,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:15:41,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:15:41,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:15:41,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886234060] [2024-06-27 21:15:41,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886234060] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:15:41,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:15:41,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:15:41,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815010454] [2024-06-27 21:15:41,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:15:41,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:15:41,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:15:41,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:15:41,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:15:41,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:15:41,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 174 transitions, 1709 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) [2024-06-27 21:15:41,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:15:41,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:15:41,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:15:43,168 INFO L124 PetriNetUnfolderBase]: 2667/4325 cut-off events. [2024-06-27 21:15:43,168 INFO L125 PetriNetUnfolderBase]: For 150670/150678 co-relation queries the response was YES. [2024-06-27 21:15:43,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23729 conditions, 4325 events. 2667/4325 cut-off events. For 150670/150678 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 25694 event pairs, 636 based on Foata normal form. 20/4337 useless extension candidates. Maximal degree in co-relation 23655. Up to 3467 conditions per place. [2024-06-27 21:15:43,205 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 147 selfloop transitions, 65 changer transitions 0/217 dead transitions. [2024-06-27 21:15:43,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 217 transitions, 2330 flow [2024-06-27 21:15:43,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:15:43,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:15:43,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-27 21:15:43,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-27 21:15:43,207 INFO L175 Difference]: Start difference. First operand has 156 places, 174 transitions, 1709 flow. Second operand 8 states and 151 transitions. [2024-06-27 21:15:43,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 217 transitions, 2330 flow [2024-06-27 21:15:43,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 217 transitions, 2173 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-27 21:15:43,415 INFO L231 Difference]: Finished difference. Result has 158 places, 175 transitions, 1730 flow [2024-06-27 21:15:43,415 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} [2024-06-27 21:15:43,416 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 114 predicate places. [2024-06-27 21:15:43,416 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 175 transitions, 1730 flow [2024-06-27 21:15:43,416 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) [2024-06-27 21:15:43,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:15:43,416 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:15:43,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 21:15:43,416 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:15:43,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:15:43,417 INFO L85 PathProgramCache]: Analyzing trace with hash 2010377686, now seen corresponding path program 3 times [2024-06-27 21:15:43,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:15:43,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072865608] [2024-06-27 21:15:43,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:15:43,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:15:43,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:15:46,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:15:46,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:15:46,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072865608] [2024-06-27 21:15:46,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072865608] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:15:46,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:15:46,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:15:46,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196103228] [2024-06-27 21:15:46,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:15:46,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:15:46,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:15:46,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:15:46,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:15:46,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:15:46,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 175 transitions, 1730 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) [2024-06-27 21:15:46,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:15:46,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:15:46,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:15:47,327 INFO L124 PetriNetUnfolderBase]: 2647/4293 cut-off events. [2024-06-27 21:15:47,327 INFO L125 PetriNetUnfolderBase]: For 145610/145618 co-relation queries the response was YES. [2024-06-27 21:15:47,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22968 conditions, 4293 events. 2647/4293 cut-off events. For 145610/145618 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 25442 event pairs, 587 based on Foata normal form. 20/4305 useless extension candidates. Maximal degree in co-relation 22893. Up to 2455 conditions per place. [2024-06-27 21:15:47,358 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 135 selfloop transitions, 75 changer transitions 0/215 dead transitions. [2024-06-27 21:15:47,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 215 transitions, 2229 flow [2024-06-27 21:15:47,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:15:47,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:15:47,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-27 21:15:47,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-27 21:15:47,362 INFO L175 Difference]: Start difference. First operand has 158 places, 175 transitions, 1730 flow. Second operand 8 states and 149 transitions. [2024-06-27 21:15:47,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 215 transitions, 2229 flow [2024-06-27 21:15:47,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 215 transitions, 2067 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-27 21:15:47,501 INFO L231 Difference]: Finished difference. Result has 159 places, 174 transitions, 1650 flow [2024-06-27 21:15:47,502 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} [2024-06-27 21:15:47,502 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 115 predicate places. [2024-06-27 21:15:47,502 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 174 transitions, 1650 flow [2024-06-27 21:15:47,502 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) [2024-06-27 21:15:47,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:15:47,503 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:15:47,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 21:15:47,503 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)] === [2024-06-27 21:15:47,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:15:47,503 INFO L85 PathProgramCache]: Analyzing trace with hash -1912396825, now seen corresponding path program 1 times [2024-06-27 21:15:47,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:15:47,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812494130] [2024-06-27 21:15:47,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:15:47,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:15:47,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:15:49,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:15:49,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:15:49,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812494130] [2024-06-27 21:15:49,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812494130] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:15:49,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:15:49,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:15:49,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570288300] [2024-06-27 21:15:49,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:15:49,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:15:49,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:15:49,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:15:49,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:15:49,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:15:49,387 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) [2024-06-27 21:15:49,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:15:49,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:15:49,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:15:50,600 INFO L124 PetriNetUnfolderBase]: 2657/4326 cut-off events. [2024-06-27 21:15:50,601 INFO L125 PetriNetUnfolderBase]: For 143208/143210 co-relation queries the response was YES. [2024-06-27 21:15:50,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23174 conditions, 4326 events. 2657/4326 cut-off events. For 143208/143210 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 25817 event pairs, 811 based on Foata normal form. 4/4329 useless extension candidates. Maximal degree in co-relation 23098. Up to 4094 conditions per place. [2024-06-27 21:15:50,631 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 165 selfloop transitions, 25 changer transitions 0/195 dead transitions. [2024-06-27 21:15:50,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 195 transitions, 2209 flow [2024-06-27 21:15:50,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:15:50,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:15:50,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-27 21:15:50,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4108527131782946 [2024-06-27 21:15:50,636 INFO L175 Difference]: Start difference. First operand has 159 places, 174 transitions, 1650 flow. Second operand 6 states and 106 transitions. [2024-06-27 21:15:50,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 195 transitions, 2209 flow [2024-06-27 21:15:50,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 195 transitions, 1958 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-27 21:15:50,783 INFO L231 Difference]: Finished difference. Result has 157 places, 177 transitions, 1492 flow [2024-06-27 21:15:50,783 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} [2024-06-27 21:15:50,784 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 113 predicate places. [2024-06-27 21:15:50,784 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 177 transitions, 1492 flow [2024-06-27 21:15:50,785 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) [2024-06-27 21:15:50,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:15:50,785 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:15:50,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 21:15:50,785 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)] === [2024-06-27 21:15:50,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:15:50,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1869810079, now seen corresponding path program 1 times [2024-06-27 21:15:50,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:15:50,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187948097] [2024-06-27 21:15:50,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:15:50,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:15:50,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:15:52,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:15:52,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:15:52,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187948097] [2024-06-27 21:15:52,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187948097] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:15:52,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:15:52,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:15:52,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966174434] [2024-06-27 21:15:52,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:15:52,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:15:52,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:15:52,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:15:52,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:15:52,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:15:52,889 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) [2024-06-27 21:15:52,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:15:52,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:15:52,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:15:54,250 INFO L124 PetriNetUnfolderBase]: 2705/4393 cut-off events. [2024-06-27 21:15:54,250 INFO L125 PetriNetUnfolderBase]: For 151637/151637 co-relation queries the response was YES. [2024-06-27 21:15:54,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22884 conditions, 4393 events. 2705/4393 cut-off events. For 151637/151637 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 26211 event pairs, 836 based on Foata normal form. 4/4389 useless extension candidates. Maximal degree in co-relation 22809. Up to 3734 conditions per place. [2024-06-27 21:15:54,284 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 165 selfloop transitions, 57 changer transitions 0/227 dead transitions. [2024-06-27 21:15:54,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 227 transitions, 2512 flow [2024-06-27 21:15:54,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:15:54,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:15:54,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-27 21:15:54,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318936877076412 [2024-06-27 21:15:54,285 INFO L175 Difference]: Start difference. First operand has 157 places, 177 transitions, 1492 flow. Second operand 7 states and 130 transitions. [2024-06-27 21:15:54,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 227 transitions, 2512 flow [2024-06-27 21:15:54,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 227 transitions, 2426 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-27 21:15:54,384 INFO L231 Difference]: Finished difference. Result has 162 places, 196 transitions, 1788 flow [2024-06-27 21:15:54,384 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=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1788, PETRI_PLACES=162, PETRI_TRANSITIONS=196} [2024-06-27 21:15:54,384 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 118 predicate places. [2024-06-27 21:15:54,384 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 196 transitions, 1788 flow [2024-06-27 21:15:54,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:54,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:15:54,385 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:15:54,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 21:15:54,385 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)] === [2024-06-27 21:15:54,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:15:54,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1268896575, now seen corresponding path program 2 times [2024-06-27 21:15:54,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:15:54,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749628905] [2024-06-27 21:15:54,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:15:54,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:15:54,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:15:56,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:15:56,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:15:56,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749628905] [2024-06-27 21:15:56,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749628905] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:15:56,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:15:56,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:15:56,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733055333] [2024-06-27 21:15:56,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:15:56,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:15:56,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:15:56,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:15:56,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:15:56,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:15:56,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 196 transitions, 1788 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:56,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:15:56,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:15:56,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:15:57,804 INFO L124 PetriNetUnfolderBase]: 2699/4389 cut-off events. [2024-06-27 21:15:57,805 INFO L125 PetriNetUnfolderBase]: For 155321/155321 co-relation queries the response was YES. [2024-06-27 21:15:57,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23810 conditions, 4389 events. 2699/4389 cut-off events. For 155321/155321 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 26129 event pairs, 824 based on Foata normal form. 2/4389 useless extension candidates. Maximal degree in co-relation 23733. Up to 4156 conditions per place. [2024-06-27 21:15:57,840 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 183 selfloop transitions, 27 changer transitions 0/215 dead transitions. [2024-06-27 21:15:57,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 215 transitions, 2356 flow [2024-06-27 21:15:57,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:15:57,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:15:57,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-27 21:15:57,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3920265780730897 [2024-06-27 21:15:57,842 INFO L175 Difference]: Start difference. First operand has 162 places, 196 transitions, 1788 flow. Second operand 7 states and 118 transitions. [2024-06-27 21:15:57,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 215 transitions, 2356 flow [2024-06-27 21:15:57,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 215 transitions, 2300 flow, removed 27 selfloop flow, removed 1 redundant places. [2024-06-27 21:15:57,975 INFO L231 Difference]: Finished difference. Result has 168 places, 196 transitions, 1792 flow [2024-06-27 21:15:57,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1732, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1792, PETRI_PLACES=168, PETRI_TRANSITIONS=196} [2024-06-27 21:15:57,976 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 124 predicate places. [2024-06-27 21:15:57,976 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 196 transitions, 1792 flow [2024-06-27 21:15:57,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:57,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:15:57,976 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:15:57,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 21:15:57,977 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:15:57,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:15:57,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1741728223, now seen corresponding path program 2 times [2024-06-27 21:15:57,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:15:57,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364661303] [2024-06-27 21:15:57,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:15:57,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:15:57,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:16:00,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:16:00,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:16:00,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364661303] [2024-06-27 21:16:00,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364661303] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:16:00,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:16:00,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:16:00,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28927369] [2024-06-27 21:16:00,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:16:00,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:16:00,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:16:00,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:16:00,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:16:00,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:16:00,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 196 transitions, 1792 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:00,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:16:00,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:16:00,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:16:01,444 INFO L124 PetriNetUnfolderBase]: 2977/4747 cut-off events. [2024-06-27 21:16:01,445 INFO L125 PetriNetUnfolderBase]: For 195222/195222 co-relation queries the response was YES. [2024-06-27 21:16:01,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26936 conditions, 4747 events. 2977/4747 cut-off events. For 195222/195222 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 27996 event pairs, 748 based on Foata normal form. 6/4745 useless extension candidates. Maximal degree in co-relation 26856. Up to 4172 conditions per place. [2024-06-27 21:16:01,484 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 184 selfloop transitions, 59 changer transitions 0/248 dead transitions. [2024-06-27 21:16:01,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 248 transitions, 2864 flow [2024-06-27 21:16:01,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:16:01,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:16:01,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-27 21:16:01,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40568475452196384 [2024-06-27 21:16:01,485 INFO L175 Difference]: Start difference. First operand has 168 places, 196 transitions, 1792 flow. Second operand 9 states and 157 transitions. [2024-06-27 21:16:01,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 248 transitions, 2864 flow [2024-06-27 21:16:01,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 248 transitions, 2762 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-27 21:16:01,638 INFO L231 Difference]: Finished difference. Result has 170 places, 219 transitions, 2109 flow [2024-06-27 21:16:01,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1690, PETRI_DIFFERENCE_MINUEND_PLACES=159, 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=2109, PETRI_PLACES=170, PETRI_TRANSITIONS=219} [2024-06-27 21:16:01,638 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 126 predicate places. [2024-06-27 21:16:01,638 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 219 transitions, 2109 flow [2024-06-27 21:16:01,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:01,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:16:01,639 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:16:01,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 21:16:01,639 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:16:01,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:16:01,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1250837127, now seen corresponding path program 3 times [2024-06-27 21:16:01,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:16:01,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249339664] [2024-06-27 21:16:01,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:16:01,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:16:01,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:16:03,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:16:03,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:16:03,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249339664] [2024-06-27 21:16:03,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249339664] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:16:03,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:16:03,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:16:03,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477979547] [2024-06-27 21:16:03,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:16:03,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:16:03,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:16:03,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:16:03,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:16:03,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:16:03,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 219 transitions, 2109 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) [2024-06-27 21:16:03,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:16:03,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:16:03,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:16:04,622 INFO L124 PetriNetUnfolderBase]: 2971/4765 cut-off events. [2024-06-27 21:16:04,622 INFO L125 PetriNetUnfolderBase]: For 201354/201354 co-relation queries the response was YES. [2024-06-27 21:16:04,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28122 conditions, 4765 events. 2971/4765 cut-off events. For 201354/201354 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 28293 event pairs, 913 based on Foata normal form. 2/4766 useless extension candidates. Maximal degree in co-relation 28042. Up to 4584 conditions per place. [2024-06-27 21:16:04,659 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 213 selfloop transitions, 14 changer transitions 0/232 dead transitions. [2024-06-27 21:16:04,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 232 transitions, 2603 flow [2024-06-27 21:16:04,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:16:04,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:16:04,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 109 transitions. [2024-06-27 21:16:04,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36212624584717606 [2024-06-27 21:16:04,660 INFO L175 Difference]: Start difference. First operand has 170 places, 219 transitions, 2109 flow. Second operand 7 states and 109 transitions. [2024-06-27 21:16:04,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 232 transitions, 2603 flow [2024-06-27 21:16:04,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 232 transitions, 2442 flow, removed 60 selfloop flow, removed 4 redundant places. [2024-06-27 21:16:04,830 INFO L231 Difference]: Finished difference. Result has 173 places, 219 transitions, 1982 flow [2024-06-27 21:16:04,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1948, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1982, PETRI_PLACES=173, PETRI_TRANSITIONS=219} [2024-06-27 21:16:04,831 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 129 predicate places. [2024-06-27 21:16:04,831 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 219 transitions, 1982 flow [2024-06-27 21:16:04,831 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) [2024-06-27 21:16:04,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:16:04,831 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:16:04,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 21:16:04,832 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:16:04,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:16:04,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1250837313, now seen corresponding path program 3 times [2024-06-27 21:16:04,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:16:04,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914417709] [2024-06-27 21:16:04,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:16:04,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:16:04,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:16:06,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:16:06,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:16:06,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914417709] [2024-06-27 21:16:06,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914417709] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:16:06,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:16:06,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:16:06,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653668303] [2024-06-27 21:16:06,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:16:06,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:16:06,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:16:06,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:16:06,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:16:07,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:16:07,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 219 transitions, 1982 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:07,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:16:07,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:16:07,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:16:08,279 INFO L124 PetriNetUnfolderBase]: 2961/4731 cut-off events. [2024-06-27 21:16:08,280 INFO L125 PetriNetUnfolderBase]: For 207237/207237 co-relation queries the response was YES. [2024-06-27 21:16:08,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27488 conditions, 4731 events. 2961/4731 cut-off events. For 207237/207237 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 27899 event pairs, 760 based on Foata normal form. 6/4729 useless extension candidates. Maximal degree in co-relation 27406. Up to 4170 conditions per place. [2024-06-27 21:16:08,312 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 183 selfloop transitions, 62 changer transitions 0/250 dead transitions. [2024-06-27 21:16:08,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 250 transitions, 2878 flow [2024-06-27 21:16:08,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:16:08,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:16:08,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-27 21:16:08,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-06-27 21:16:08,314 INFO L175 Difference]: Start difference. First operand has 173 places, 219 transitions, 1982 flow. Second operand 8 states and 140 transitions. [2024-06-27 21:16:08,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 250 transitions, 2878 flow [2024-06-27 21:16:08,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 250 transitions, 2850 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 21:16:08,495 INFO L231 Difference]: Finished difference. Result has 176 places, 228 transitions, 2259 flow [2024-06-27 21:16:08,495 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} [2024-06-27 21:16:08,495 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 132 predicate places. [2024-06-27 21:16:08,496 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 228 transitions, 2259 flow [2024-06-27 21:16:08,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:08,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:16:08,496 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:16:08,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 21:16:08,496 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:16:08,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:16:08,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1251083391, now seen corresponding path program 1 times [2024-06-27 21:16:08,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:16:08,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478919841] [2024-06-27 21:16:08,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:16:08,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:16:08,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:16:11,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:16:11,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:16:11,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478919841] [2024-06-27 21:16:11,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478919841] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:16:11,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:16:11,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:16:11,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922440937] [2024-06-27 21:16:11,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:16:11,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:16:11,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:16:11,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:16:11,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:16:11,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:16:11,727 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) [2024-06-27 21:16:11,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:16:11,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:16:11,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:16:13,099 INFO L124 PetriNetUnfolderBase]: 3000/4788 cut-off events. [2024-06-27 21:16:13,099 INFO L125 PetriNetUnfolderBase]: For 223931/223931 co-relation queries the response was YES. [2024-06-27 21:16:13,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28333 conditions, 4788 events. 3000/4788 cut-off events. For 223931/223931 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 28161 event pairs, 749 based on Foata normal form. 14/4794 useless extension candidates. Maximal degree in co-relation 28249. Up to 4464 conditions per place. [2024-06-27 21:16:13,142 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 215 selfloop transitions, 33 changer transitions 0/253 dead transitions. [2024-06-27 21:16:13,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 253 transitions, 2899 flow [2024-06-27 21:16:13,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:16:13,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:16:13,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-27 21:16:13,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4053156146179402 [2024-06-27 21:16:13,143 INFO L175 Difference]: Start difference. First operand has 176 places, 228 transitions, 2259 flow. Second operand 7 states and 122 transitions. [2024-06-27 21:16:13,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 253 transitions, 2899 flow [2024-06-27 21:16:13,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 253 transitions, 2798 flow, removed 34 selfloop flow, removed 3 redundant places. [2024-06-27 21:16:13,396 INFO L231 Difference]: Finished difference. Result has 180 places, 230 transitions, 2263 flow [2024-06-27 21:16:13,397 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} [2024-06-27 21:16:13,397 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 136 predicate places. [2024-06-27 21:16:13,397 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 230 transitions, 2263 flow [2024-06-27 21:16:13,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:13,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:16:13,397 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:16:13,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 21:16:13,397 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:16:13,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:16:13,398 INFO L85 PathProgramCache]: Analyzing trace with hash 612237650, now seen corresponding path program 1 times [2024-06-27 21:16:13,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:16:13,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382191132] [2024-06-27 21:16:13,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:16:13,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:16:13,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:16:15,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:16:15,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:16:15,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382191132] [2024-06-27 21:16:15,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382191132] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:16:15,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:16:15,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:16:15,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670480682] [2024-06-27 21:16:15,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:16:15,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:16:15,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:16:15,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:16:15,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:16:15,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:16:15,332 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) [2024-06-27 21:16:15,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:16:15,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:16:15,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:16:16,854 INFO L124 PetriNetUnfolderBase]: 3061/4918 cut-off events. [2024-06-27 21:16:16,855 INFO L125 PetriNetUnfolderBase]: For 223846/223846 co-relation queries the response was YES. [2024-06-27 21:16:16,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29530 conditions, 4918 events. 3061/4918 cut-off events. For 223846/223846 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 29381 event pairs, 841 based on Foata normal form. 1/4917 useless extension candidates. Maximal degree in co-relation 29444. Up to 4093 conditions per place. [2024-06-27 21:16:16,899 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 192 selfloop transitions, 81 changer transitions 0/278 dead transitions. [2024-06-27 21:16:16,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 278 transitions, 3435 flow [2024-06-27 21:16:16,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:16:16,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:16:16,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-27 21:16:16,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46179401993355484 [2024-06-27 21:16:16,901 INFO L175 Difference]: Start difference. First operand has 180 places, 230 transitions, 2263 flow. Second operand 7 states and 139 transitions. [2024-06-27 21:16:16,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 278 transitions, 3435 flow [2024-06-27 21:16:17,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 278 transitions, 3350 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-27 21:16:17,170 INFO L231 Difference]: Finished difference. Result has 185 places, 246 transitions, 2702 flow [2024-06-27 21:16:17,170 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} [2024-06-27 21:16:17,170 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 141 predicate places. [2024-06-27 21:16:17,170 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 246 transitions, 2702 flow [2024-06-27 21:16:17,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:17,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:16:17,170 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:16:17,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 21:16:17,171 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:16:17,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:16:17,171 INFO L85 PathProgramCache]: Analyzing trace with hash 412739994, now seen corresponding path program 2 times [2024-06-27 21:16:17,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:16:17,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765380010] [2024-06-27 21:16:17,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:16:17,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:16:17,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:16:19,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:16:19,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:16:19,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765380010] [2024-06-27 21:16:19,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765380010] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:16:19,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:16:19,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:16:19,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608640717] [2024-06-27 21:16:19,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:16:19,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:16:19,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:16:19,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:16:19,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:16:19,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:16:19,257 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) [2024-06-27 21:16:19,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:16:19,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:16:19,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:16:20,704 INFO L124 PetriNetUnfolderBase]: 3103/4975 cut-off events. [2024-06-27 21:16:20,704 INFO L125 PetriNetUnfolderBase]: For 241870/241870 co-relation queries the response was YES. [2024-06-27 21:16:20,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31246 conditions, 4975 events. 3103/4975 cut-off events. For 241870/241870 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 29739 event pairs, 825 based on Foata normal form. 2/4976 useless extension candidates. Maximal degree in co-relation 31156. Up to 4640 conditions per place. [2024-06-27 21:16:20,750 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 236 selfloop transitions, 45 changer transitions 0/286 dead transitions. [2024-06-27 21:16:20,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 286 transitions, 3714 flow [2024-06-27 21:16:20,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:16:20,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:16:20,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-27 21:16:20,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4127906976744186 [2024-06-27 21:16:20,751 INFO L175 Difference]: Start difference. First operand has 185 places, 246 transitions, 2702 flow. Second operand 8 states and 142 transitions. [2024-06-27 21:16:20,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 286 transitions, 3714 flow [2024-06-27 21:16:21,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 286 transitions, 3658 flow, removed 27 selfloop flow, removed 1 redundant places. [2024-06-27 21:16:21,019 INFO L231 Difference]: Finished difference. Result has 193 places, 258 transitions, 2994 flow [2024-06-27 21:16:21,019 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} [2024-06-27 21:16:21,019 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 149 predicate places. [2024-06-27 21:16:21,019 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 258 transitions, 2994 flow [2024-06-27 21:16:21,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:21,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:16:21,019 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:16:21,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 21:16:21,019 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:16:21,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:16:21,020 INFO L85 PathProgramCache]: Analyzing trace with hash -78478974, now seen corresponding path program 3 times [2024-06-27 21:16:21,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:16:21,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510116285] [2024-06-27 21:16:21,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:16:21,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:16:21,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:16:22,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:16:22,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:16:22,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510116285] [2024-06-27 21:16:22,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510116285] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:16:22,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:16:22,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:16:22,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521435604] [2024-06-27 21:16:22,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:16:22,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:16:22,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:16:22,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:16:22,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:16:22,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:16:22,965 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) [2024-06-27 21:16:22,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:16:22,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:16:22,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:16:24,559 INFO L124 PetriNetUnfolderBase]: 3108/4984 cut-off events. [2024-06-27 21:16:24,560 INFO L125 PetriNetUnfolderBase]: For 249599/249599 co-relation queries the response was YES. [2024-06-27 21:16:24,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31712 conditions, 4984 events. 3108/4984 cut-off events. For 249599/249599 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 29748 event pairs, 929 based on Foata normal form. 1/4977 useless extension candidates. Maximal degree in co-relation 31618. Up to 4135 conditions per place. [2024-06-27 21:16:24,602 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 198 selfloop transitions, 86 changer transitions 0/289 dead transitions. [2024-06-27 21:16:24,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 289 transitions, 4014 flow [2024-06-27 21:16:24,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:16:24,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:16:24,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-27 21:16:24,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43853820598006643 [2024-06-27 21:16:24,603 INFO L175 Difference]: Start difference. First operand has 193 places, 258 transitions, 2994 flow. Second operand 7 states and 132 transitions. [2024-06-27 21:16:24,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 289 transitions, 4014 flow [2024-06-27 21:16:24,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 289 transitions, 3872 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-27 21:16:24,867 INFO L231 Difference]: Finished difference. Result has 195 places, 261 transitions, 3089 flow [2024-06-27 21:16:24,867 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} [2024-06-27 21:16:24,868 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 151 predicate places. [2024-06-27 21:16:24,868 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 261 transitions, 3089 flow [2024-06-27 21:16:24,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:24,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:16:24,868 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:16:24,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 21:16:24,868 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:16:24,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:16:24,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1764271718, now seen corresponding path program 4 times [2024-06-27 21:16:24,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:16:24,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612320701] [2024-06-27 21:16:24,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:16:24,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:16:24,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:16:26,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:16:26,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:16:26,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612320701] [2024-06-27 21:16:26,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612320701] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:16:26,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:16:26,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:16:26,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172010009] [2024-06-27 21:16:26,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:16:26,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:16:26,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:16:26,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:16:26,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:16:26,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:16:26,967 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) [2024-06-27 21:16:26,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:16:26,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:16:26,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:16:28,582 INFO L124 PetriNetUnfolderBase]: 3095/4966 cut-off events. [2024-06-27 21:16:28,582 INFO L125 PetriNetUnfolderBase]: For 259482/259482 co-relation queries the response was YES. [2024-06-27 21:16:28,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31880 conditions, 4966 events. 3095/4966 cut-off events. For 259482/259482 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 29667 event pairs, 934 based on Foata normal form. 3/4961 useless extension candidates. Maximal degree in co-relation 31785. Up to 4128 conditions per place. [2024-06-27 21:16:28,625 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 197 selfloop transitions, 83 changer transitions 0/285 dead transitions. [2024-06-27 21:16:28,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 285 transitions, 3931 flow [2024-06-27 21:16:28,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:16:28,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:16:28,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-27 21:16:28,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 21:16:28,626 INFO L175 Difference]: Start difference. First operand has 195 places, 261 transitions, 3089 flow. Second operand 7 states and 129 transitions. [2024-06-27 21:16:28,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 285 transitions, 3931 flow [2024-06-27 21:16:28,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 285 transitions, 3734 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-27 21:16:28,956 INFO L231 Difference]: Finished difference. Result has 198 places, 261 transitions, 3066 flow [2024-06-27 21:16:28,956 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} [2024-06-27 21:16:28,956 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 154 predicate places. [2024-06-27 21:16:28,956 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 261 transitions, 3066 flow [2024-06-27 21:16:28,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:28,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:16:28,957 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:16:28,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 21:16:28,957 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:16:28,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:16:28,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1833635772, now seen corresponding path program 5 times [2024-06-27 21:16:28,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:16:28,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611053886] [2024-06-27 21:16:28,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:16:28,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:16:28,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:16:31,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:16:31,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:16:31,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611053886] [2024-06-27 21:16:31,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611053886] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:16:31,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:16:31,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:16:31,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350432733] [2024-06-27 21:16:31,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:16:31,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:16:31,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:16:31,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:16:31,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:16:31,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:16:31,077 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) [2024-06-27 21:16:31,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:16:31,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:16:31,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:16:32,431 INFO L124 PetriNetUnfolderBase]: 3086/4939 cut-off events. [2024-06-27 21:16:32,431 INFO L125 PetriNetUnfolderBase]: For 262716/262716 co-relation queries the response was YES. [2024-06-27 21:16:32,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31629 conditions, 4939 events. 3086/4939 cut-off events. For 262716/262716 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 29329 event pairs, 771 based on Foata normal form. 3/4934 useless extension candidates. Maximal degree in co-relation 31534. Up to 4301 conditions per place. [2024-06-27 21:16:32,473 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 205 selfloop transitions, 74 changer transitions 0/284 dead transitions. [2024-06-27 21:16:32,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 284 transitions, 3938 flow [2024-06-27 21:16:32,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:16:32,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:16:32,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-27 21:16:32,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40406976744186046 [2024-06-27 21:16:32,474 INFO L175 Difference]: Start difference. First operand has 198 places, 261 transitions, 3066 flow. Second operand 8 states and 139 transitions. [2024-06-27 21:16:32,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 284 transitions, 3938 flow [2024-06-27 21:16:32,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 284 transitions, 3722 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-27 21:16:32,867 INFO L231 Difference]: Finished difference. Result has 200 places, 261 transitions, 3011 flow [2024-06-27 21:16:32,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2854, PETRI_DIFFERENCE_MINUEND_PLACES=192, 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=3011, PETRI_PLACES=200, PETRI_TRANSITIONS=261} [2024-06-27 21:16:32,867 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 156 predicate places. [2024-06-27 21:16:32,867 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 261 transitions, 3011 flow [2024-06-27 21:16:32,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:32,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:16:32,868 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:16:32,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 21:16:32,868 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:16:32,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:16:32,868 INFO L85 PathProgramCache]: Analyzing trace with hash -574828134, now seen corresponding path program 6 times [2024-06-27 21:16:32,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:16:32,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680185356] [2024-06-27 21:16:32,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:16:32,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:16:32,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:16:34,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:16:34,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:16:34,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680185356] [2024-06-27 21:16:34,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680185356] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:16:34,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:16:34,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:16:34,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685991840] [2024-06-27 21:16:34,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:16:34,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:16:34,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:16:34,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:16:34,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:16:34,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:16:34,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 261 transitions, 3011 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:34,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:16:34,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:16:34,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:16:36,484 INFO L124 PetriNetUnfolderBase]: 3060/4907 cut-off events. [2024-06-27 21:16:36,484 INFO L125 PetriNetUnfolderBase]: For 265696/265696 co-relation queries the response was YES. [2024-06-27 21:16:36,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30978 conditions, 4907 events. 3060/4907 cut-off events. For 265696/265696 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 29170 event pairs, 761 based on Foata normal form. 6/4905 useless extension candidates. Maximal degree in co-relation 30882. Up to 4287 conditions per place. [2024-06-27 21:16:36,524 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 207 selfloop transitions, 76 changer transitions 0/288 dead transitions. [2024-06-27 21:16:36,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 288 transitions, 3915 flow [2024-06-27 21:16:36,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:16:36,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:16:36,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-27 21:16:36,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40568475452196384 [2024-06-27 21:16:36,525 INFO L175 Difference]: Start difference. First operand has 200 places, 261 transitions, 3011 flow. Second operand 9 states and 157 transitions. [2024-06-27 21:16:36,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 288 transitions, 3915 flow [2024-06-27 21:16:36,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 288 transitions, 3732 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-27 21:16:36,859 INFO L231 Difference]: Finished difference. Result has 203 places, 261 transitions, 2992 flow [2024-06-27 21:16:36,859 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} [2024-06-27 21:16:36,860 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 159 predicate places. [2024-06-27 21:16:36,860 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 261 transitions, 2992 flow [2024-06-27 21:16:36,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:36,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:16:36,860 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:16:36,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 21:16:36,861 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:16:36,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:16:36,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1494421085, now seen corresponding path program 1 times [2024-06-27 21:16:36,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:16:36,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517771444] [2024-06-27 21:16:36,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:16:36,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:16:36,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:16:39,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:16:39,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:16:39,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517771444] [2024-06-27 21:16:39,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517771444] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:16:39,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:16:39,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:16:39,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079340351] [2024-06-27 21:16:39,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:16:39,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:16:39,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:16:39,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:16:39,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:16:39,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:16:39,063 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) [2024-06-27 21:16:39,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:16:39,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:16:39,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:16:40,716 INFO L124 PetriNetUnfolderBase]: 3156/5060 cut-off events. [2024-06-27 21:16:40,716 INFO L125 PetriNetUnfolderBase]: For 289294/289302 co-relation queries the response was YES. [2024-06-27 21:16:40,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32265 conditions, 5060 events. 3156/5060 cut-off events. For 289294/289302 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 30355 event pairs, 870 based on Foata normal form. 16/5072 useless extension candidates. Maximal degree in co-relation 32168. Up to 4164 conditions per place. [2024-06-27 21:16:40,768 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 206 selfloop transitions, 86 changer transitions 0/297 dead transitions. [2024-06-27 21:16:40,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 297 transitions, 4034 flow [2024-06-27 21:16:40,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:16:40,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:16:40,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-27 21:16:40,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43521594684385384 [2024-06-27 21:16:40,856 INFO L175 Difference]: Start difference. First operand has 203 places, 261 transitions, 2992 flow. Second operand 7 states and 131 transitions. [2024-06-27 21:16:40,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 297 transitions, 4034 flow [2024-06-27 21:16:41,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 297 transitions, 3764 flow, removed 16 selfloop flow, removed 10 redundant places. [2024-06-27 21:16:41,146 INFO L231 Difference]: Finished difference. Result has 201 places, 271 transitions, 3079 flow [2024-06-27 21:16:41,147 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} [2024-06-27 21:16:41,147 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 157 predicate places. [2024-06-27 21:16:41,147 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 271 transitions, 3079 flow [2024-06-27 21:16:41,147 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) [2024-06-27 21:16:41,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:16:41,147 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:16:41,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 21:16:41,147 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:16:41,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:16:41,148 INFO L85 PathProgramCache]: Analyzing trace with hash -2129535451, now seen corresponding path program 2 times [2024-06-27 21:16:41,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:16:41,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355143116] [2024-06-27 21:16:41,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:16:41,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:16:41,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:16:43,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:16:43,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:16:43,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355143116] [2024-06-27 21:16:43,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355143116] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:16:43,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:16:43,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:16:43,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45889679] [2024-06-27 21:16:43,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:16:43,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:16:43,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:16:43,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:16:43,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:16:43,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:16:43,562 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) [2024-06-27 21:16:43,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:16:43,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:16:43,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:16:45,669 INFO L124 PetriNetUnfolderBase]: 3196/5100 cut-off events. [2024-06-27 21:16:45,669 INFO L125 PetriNetUnfolderBase]: For 301728/301728 co-relation queries the response was YES. [2024-06-27 21:16:45,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32882 conditions, 5100 events. 3196/5100 cut-off events. For 301728/301728 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 30400 event pairs, 911 based on Foata normal form. 8/5100 useless extension candidates. Maximal degree in co-relation 32784. Up to 4188 conditions per place. [2024-06-27 21:16:45,720 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 204 selfloop transitions, 100 changer transitions 0/309 dead transitions. [2024-06-27 21:16:45,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 309 transitions, 4191 flow [2024-06-27 21:16:45,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:16:45,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:16:45,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 176 transitions. [2024-06-27 21:16:45,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40930232558139534 [2024-06-27 21:16:45,721 INFO L175 Difference]: Start difference. First operand has 201 places, 271 transitions, 3079 flow. Second operand 10 states and 176 transitions. [2024-06-27 21:16:45,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 309 transitions, 4191 flow [2024-06-27 21:16:46,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 309 transitions, 4054 flow, removed 36 selfloop flow, removed 2 redundant places. [2024-06-27 21:16:46,056 INFO L231 Difference]: Finished difference. Result has 209 places, 275 transitions, 3223 flow [2024-06-27 21:16:46,056 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=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3223, PETRI_PLACES=209, PETRI_TRANSITIONS=275} [2024-06-27 21:16:46,056 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 165 predicate places. [2024-06-27 21:16:46,056 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 275 transitions, 3223 flow [2024-06-27 21:16:46,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:46,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:16:46,056 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:16:46,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 21:16:46,057 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:16:46,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:16:46,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1490702015, now seen corresponding path program 3 times [2024-06-27 21:16:46,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:16:46,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604495517] [2024-06-27 21:16:46,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:16:46,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:16:46,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:16:48,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:16:48,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:16:48,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604495517] [2024-06-27 21:16:48,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604495517] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:16:48,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:16:48,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:16:48,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386526112] [2024-06-27 21:16:48,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:16:48,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:16:48,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:16:48,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:16:48,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:16:48,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:16:48,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 275 transitions, 3223 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:48,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:16:48,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:16:48,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:16:50,245 INFO L124 PetriNetUnfolderBase]: 3180/5092 cut-off events. [2024-06-27 21:16:50,245 INFO L125 PetriNetUnfolderBase]: For 298673/298673 co-relation queries the response was YES. [2024-06-27 21:16:50,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32373 conditions, 5092 events. 3180/5092 cut-off events. For 298673/298673 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 30471 event pairs, 923 based on Foata normal form. 8/5092 useless extension candidates. Maximal degree in co-relation 32273. Up to 4184 conditions per place. [2024-06-27 21:16:50,295 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 204 selfloop transitions, 94 changer transitions 0/303 dead transitions. [2024-06-27 21:16:50,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 303 transitions, 4129 flow [2024-06-27 21:16:50,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:16:50,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:16:50,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-27 21:16:50,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42441860465116277 [2024-06-27 21:16:50,297 INFO L175 Difference]: Start difference. First operand has 209 places, 275 transitions, 3223 flow. Second operand 8 states and 146 transitions. [2024-06-27 21:16:50,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 303 transitions, 4129 flow [2024-06-27 21:16:50,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 303 transitions, 3814 flow, removed 45 selfloop flow, removed 8 redundant places. [2024-06-27 21:16:50,740 INFO L231 Difference]: Finished difference. Result has 209 places, 275 transitions, 3104 flow [2024-06-27 21:16:50,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2908, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3104, PETRI_PLACES=209, PETRI_TRANSITIONS=275} [2024-06-27 21:16:50,741 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 165 predicate places. [2024-06-27 21:16:50,741 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 275 transitions, 3104 flow [2024-06-27 21:16:50,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:50,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:16:50,741 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:16:50,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 21:16:50,741 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:16:50,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:16:50,742 INFO L85 PathProgramCache]: Analyzing trace with hash 1841002085, now seen corresponding path program 4 times [2024-06-27 21:16:50,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:16:50,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639132401] [2024-06-27 21:16:50,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:16:50,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:16:50,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:16:52,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:16:52,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:16:52,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639132401] [2024-06-27 21:16:52,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639132401] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:16:52,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:16:52,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:16:52,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878142579] [2024-06-27 21:16:52,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:16:52,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:16:52,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:16:52,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:16:52,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:16:52,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:16:52,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 275 transitions, 3104 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) [2024-06-27 21:16:52,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:16:52,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:16:52,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:16:54,551 INFO L124 PetriNetUnfolderBase]: 3240/5161 cut-off events. [2024-06-27 21:16:54,551 INFO L125 PetriNetUnfolderBase]: For 315048/315048 co-relation queries the response was YES. [2024-06-27 21:16:54,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32575 conditions, 5161 events. 3240/5161 cut-off events. For 315048/315048 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 30707 event pairs, 776 based on Foata normal form. 12/5165 useless extension candidates. Maximal degree in co-relation 32476. Up to 4497 conditions per place. [2024-06-27 21:16:54,598 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 211 selfloop transitions, 91 changer transitions 0/307 dead transitions. [2024-06-27 21:16:54,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 307 transitions, 4111 flow [2024-06-27 21:16:54,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:16:54,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:16:54,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-27 21:16:54,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4082687338501292 [2024-06-27 21:16:54,599 INFO L175 Difference]: Start difference. First operand has 209 places, 275 transitions, 3104 flow. Second operand 9 states and 158 transitions. [2024-06-27 21:16:54,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 307 transitions, 4111 flow [2024-06-27 21:16:55,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 307 transitions, 3917 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 21:16:55,016 INFO L231 Difference]: Finished difference. Result has 211 places, 282 transitions, 3208 flow [2024-06-27 21:16:55,016 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} [2024-06-27 21:16:55,017 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 167 predicate places. [2024-06-27 21:16:55,017 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 282 transitions, 3208 flow [2024-06-27 21:16:55,017 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) [2024-06-27 21:16:55,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:16:55,017 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:16:55,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 21:16:55,017 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:16:55,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:16:55,018 INFO L85 PathProgramCache]: Analyzing trace with hash -568152811, now seen corresponding path program 5 times [2024-06-27 21:16:55,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:16:55,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30507505] [2024-06-27 21:16:55,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:16:55,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:16:55,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:16:57,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:16:57,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:16:57,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30507505] [2024-06-27 21:16:57,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30507505] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:16:57,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:16:57,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:16:57,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171569938] [2024-06-27 21:16:57,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:16:57,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:16:57,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:16:57,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:16:57,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:16:57,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:16:57,170 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) [2024-06-27 21:16:57,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:16:57,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:16:57,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:16:58,481 INFO L124 PetriNetUnfolderBase]: 3220/5133 cut-off events. [2024-06-27 21:16:58,481 INFO L125 PetriNetUnfolderBase]: For 303816/303816 co-relation queries the response was YES. [2024-06-27 21:16:58,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31805 conditions, 5133 events. 3220/5133 cut-off events. For 303816/303816 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 30531 event pairs, 774 based on Foata normal form. 12/5137 useless extension candidates. Maximal degree in co-relation 31705. Up to 4493 conditions per place. [2024-06-27 21:16:58,533 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 216 selfloop transitions, 82 changer transitions 0/303 dead transitions. [2024-06-27 21:16:58,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 303 transitions, 3982 flow [2024-06-27 21:16:58,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:16:58,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:16:58,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-27 21:16:58,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-06-27 21:16:58,534 INFO L175 Difference]: Start difference. First operand has 211 places, 282 transitions, 3208 flow. Second operand 8 states and 140 transitions. [2024-06-27 21:16:58,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 303 transitions, 3982 flow [2024-06-27 21:16:58,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 303 transitions, 3807 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-27 21:16:58,933 INFO L231 Difference]: Finished difference. Result has 213 places, 282 transitions, 3211 flow [2024-06-27 21:16:58,933 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} [2024-06-27 21:16:58,933 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 169 predicate places. [2024-06-27 21:16:58,933 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 282 transitions, 3211 flow [2024-06-27 21:16:58,933 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) [2024-06-27 21:16:58,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:16:58,934 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:16:58,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 21:16:58,934 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:16:58,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:16:58,935 INFO L85 PathProgramCache]: Analyzing trace with hash 273821316, now seen corresponding path program 1 times [2024-06-27 21:16:58,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:16:58,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973316616] [2024-06-27 21:16:58,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:16:58,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:16:58,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:17:00,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:17:00,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:17:00,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973316616] [2024-06-27 21:17:00,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973316616] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:17:00,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:17:00,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:17:00,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925733863] [2024-06-27 21:17:00,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:17:00,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:17:00,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:17:00,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:17:00,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:17:00,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:17:00,948 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) [2024-06-27 21:17:00,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:17:00,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:17:00,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:17:02,650 INFO L124 PetriNetUnfolderBase]: 3326/5316 cut-off events. [2024-06-27 21:17:02,650 INFO L125 PetriNetUnfolderBase]: For 318901/318905 co-relation queries the response was YES. [2024-06-27 21:17:02,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33586 conditions, 5316 events. 3326/5316 cut-off events. For 318901/318905 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 32001 event pairs, 887 based on Foata normal form. 6/5320 useless extension candidates. Maximal degree in co-relation 33485. Up to 4300 conditions per place. [2024-06-27 21:17:02,704 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 200 selfloop transitions, 121 changer transitions 0/326 dead transitions. [2024-06-27 21:17:02,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 326 transitions, 4346 flow [2024-06-27 21:17:02,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:17:02,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:17:02,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-27 21:17:02,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-27 21:17:02,705 INFO L175 Difference]: Start difference. First operand has 213 places, 282 transitions, 3211 flow. Second operand 7 states and 140 transitions. [2024-06-27 21:17:02,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 326 transitions, 4346 flow [2024-06-27 21:17:03,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 326 transitions, 4078 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-27 21:17:03,028 INFO L231 Difference]: Finished difference. Result has 211 places, 293 transitions, 3344 flow [2024-06-27 21:17:03,028 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} [2024-06-27 21:17:03,028 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 167 predicate places. [2024-06-27 21:17:03,028 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 293 transitions, 3344 flow [2024-06-27 21:17:03,029 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) [2024-06-27 21:17:03,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:17:03,029 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:17:03,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 21:17:03,029 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:17:03,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:17:03,029 INFO L85 PathProgramCache]: Analyzing trace with hash 252399198, now seen corresponding path program 2 times [2024-06-27 21:17:03,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:17:03,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636384338] [2024-06-27 21:17:03,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:17:03,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:17:03,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:17:05,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:17:05,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:17:05,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636384338] [2024-06-27 21:17:05,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636384338] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:17:05,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:17:05,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:17:05,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013754655] [2024-06-27 21:17:05,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:17:05,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:17:05,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:17:05,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:17:05,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:17:05,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:17:05,398 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) [2024-06-27 21:17:05,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:17:05,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:17:05,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:17:07,265 INFO L124 PetriNetUnfolderBase]: 3336/5329 cut-off events. [2024-06-27 21:17:07,265 INFO L125 PetriNetUnfolderBase]: For 328915/328915 co-relation queries the response was YES. [2024-06-27 21:17:07,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33927 conditions, 5329 events. 3336/5329 cut-off events. For 328915/328915 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 32003 event pairs, 892 based on Foata normal form. 2/5329 useless extension candidates. Maximal degree in co-relation 33826. Up to 4306 conditions per place. [2024-06-27 21:17:07,318 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 202 selfloop transitions, 121 changer transitions 0/328 dead transitions. [2024-06-27 21:17:07,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 328 transitions, 4253 flow [2024-06-27 21:17:07,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:17:07,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:17:07,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-27 21:17:07,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-27 21:17:07,320 INFO L175 Difference]: Start difference. First operand has 211 places, 293 transitions, 3344 flow. Second operand 8 states and 150 transitions. [2024-06-27 21:17:07,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 328 transitions, 4253 flow [2024-06-27 21:17:07,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 328 transitions, 4105 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 21:17:07,666 INFO L231 Difference]: Finished difference. Result has 216 places, 296 transitions, 3485 flow [2024-06-27 21:17:07,667 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} [2024-06-27 21:17:07,667 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 172 predicate places. [2024-06-27 21:17:07,667 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 296 transitions, 3485 flow [2024-06-27 21:17:07,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:17:07,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:17:07,667 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:17:07,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 21:17:07,668 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:17:07,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:17:07,668 INFO L85 PathProgramCache]: Analyzing trace with hash -89959924, now seen corresponding path program 3 times [2024-06-27 21:17:07,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:17:07,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797469116] [2024-06-27 21:17:07,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:17:07,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:17:07,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:17:09,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:17:09,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:17:09,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797469116] [2024-06-27 21:17:09,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797469116] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:17:09,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:17:09,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:17:09,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631904625] [2024-06-27 21:17:09,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:17:09,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:17:09,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:17:09,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:17:09,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:17:09,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:17:09,722 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) [2024-06-27 21:17:09,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:17:09,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:17:09,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:17:11,329 INFO L124 PetriNetUnfolderBase]: 3324/5306 cut-off events. [2024-06-27 21:17:11,329 INFO L125 PetriNetUnfolderBase]: For 336292/336292 co-relation queries the response was YES. [2024-06-27 21:17:11,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33882 conditions, 5306 events. 3324/5306 cut-off events. For 336292/336292 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 31769 event pairs, 855 based on Foata normal form. 4/5309 useless extension candidates. Maximal degree in co-relation 33780. Up to 4961 conditions per place. [2024-06-27 21:17:11,374 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 271 selfloop transitions, 45 changer transitions 0/321 dead transitions. [2024-06-27 21:17:11,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 321 transitions, 4209 flow [2024-06-27 21:17:11,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:17:11,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:17:11,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-27 21:17:11,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40988372093023256 [2024-06-27 21:17:11,375 INFO L175 Difference]: Start difference. First operand has 216 places, 296 transitions, 3485 flow. Second operand 8 states and 141 transitions. [2024-06-27 21:17:11,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 321 transitions, 4209 flow [2024-06-27 21:17:11,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 321 transitions, 3945 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-27 21:17:11,817 INFO L231 Difference]: Finished difference. Result has 218 places, 296 transitions, 3323 flow [2024-06-27 21:17:11,817 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} [2024-06-27 21:17:11,818 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 174 predicate places. [2024-06-27 21:17:11,818 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 296 transitions, 3323 flow [2024-06-27 21:17:11,818 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) [2024-06-27 21:17:11,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:17:11,818 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] [2024-06-27 21:17:11,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 21:17:11,818 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:17:11,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:17:11,818 INFO L85 PathProgramCache]: Analyzing trace with hash 758368780, now seen corresponding path program 4 times [2024-06-27 21:17:11,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:17:11,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381600820] [2024-06-27 21:17:11,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:17:11,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:17:11,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:17:14,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:17:14,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:17:14,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381600820] [2024-06-27 21:17:14,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381600820] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:17:14,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:17:14,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:17:14,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030010791] [2024-06-27 21:17:14,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:17:14,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:17:14,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:17:14,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:17:14,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:17:14,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:17:14,138 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) [2024-06-27 21:17:14,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:17:14,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:17:14,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:17:15,980 INFO L124 PetriNetUnfolderBase]: 3334/5320 cut-off events. [2024-06-27 21:17:15,980 INFO L125 PetriNetUnfolderBase]: For 340262/340262 co-relation queries the response was YES. [2024-06-27 21:17:16,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33529 conditions, 5320 events. 3334/5320 cut-off events. For 340262/340262 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 31920 event pairs, 1009 based on Foata normal form. 2/5314 useless extension candidates. Maximal degree in co-relation 33426. Up to 4301 conditions per place. [2024-06-27 21:17:16,034 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 209 selfloop transitions, 113 changer transitions 0/327 dead transitions. [2024-06-27 21:17:16,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 327 transitions, 4219 flow [2024-06-27 21:17:16,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:17:16,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:17:16,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-27 21:17:16,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41569767441860467 [2024-06-27 21:17:16,035 INFO L175 Difference]: Start difference. First operand has 218 places, 296 transitions, 3323 flow. Second operand 8 states and 143 transitions. [2024-06-27 21:17:16,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 327 transitions, 4219 flow [2024-06-27 21:17:16,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 327 transitions, 4129 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 21:17:16,587 INFO L231 Difference]: Finished difference. Result has 219 places, 299 transitions, 3505 flow [2024-06-27 21:17:16,587 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} [2024-06-27 21:17:16,587 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 175 predicate places. [2024-06-27 21:17:16,588 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 299 transitions, 3505 flow [2024-06-27 21:17:16,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:17:16,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:17:16,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:17:16,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 21:17:16,588 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:17:16,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:17:16,588 INFO L85 PathProgramCache]: Analyzing trace with hash -2043653470, now seen corresponding path program 5 times [2024-06-27 21:17:16,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:17:16,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072975434] [2024-06-27 21:17:16,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:17:16,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:17:16,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:17:18,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:17:18,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:17:18,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072975434] [2024-06-27 21:17:18,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072975434] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:17:18,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:17:18,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:17:18,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267815987] [2024-06-27 21:17:18,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:17:18,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:17:18,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:17:18,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:17:18,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:17:18,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:17:18,614 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) [2024-06-27 21:17:18,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:17:18,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:17:18,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:17:20,320 INFO L124 PetriNetUnfolderBase]: 3344/5338 cut-off events. [2024-06-27 21:17:20,320 INFO L125 PetriNetUnfolderBase]: For 353816/353824 co-relation queries the response was YES. [2024-06-27 21:17:20,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34316 conditions, 5338 events. 3344/5338 cut-off events. For 353816/353824 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 32067 event pairs, 870 based on Foata normal form. 10/5344 useless extension candidates. Maximal degree in co-relation 34212. Up to 4307 conditions per place. [2024-06-27 21:17:20,377 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 214 selfloop transitions, 112 changer transitions 0/331 dead transitions. [2024-06-27 21:17:20,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 331 transitions, 4545 flow [2024-06-27 21:17:20,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:17:20,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:17:20,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-27 21:17:20,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-27 21:17:20,378 INFO L175 Difference]: Start difference. First operand has 219 places, 299 transitions, 3505 flow. Second operand 7 states and 133 transitions. [2024-06-27 21:17:20,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 331 transitions, 4545 flow [2024-06-27 21:17:20,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 331 transitions, 4392 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-27 21:17:20,878 INFO L231 Difference]: Finished difference. Result has 221 places, 302 transitions, 3625 flow [2024-06-27 21:17:20,878 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} [2024-06-27 21:17:20,878 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 177 predicate places. [2024-06-27 21:17:20,878 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 302 transitions, 3625 flow [2024-06-27 21:17:20,878 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) [2024-06-27 21:17:20,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:17:20,879 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:17:20,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 21:17:20,879 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:17:20,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:17:20,879 INFO L85 PathProgramCache]: Analyzing trace with hash 432713766, now seen corresponding path program 6 times [2024-06-27 21:17:20,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:17:20,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185963942] [2024-06-27 21:17:20,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:17:20,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:17:20,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:17:22,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:17:22,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:17:22,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185963942] [2024-06-27 21:17:22,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185963942] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:17:22,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:17:22,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:17:22,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513558752] [2024-06-27 21:17:22,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:17:22,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:17:22,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:17:22,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:17:22,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:17:22,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:17:22,998 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) [2024-06-27 21:17:22,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:17:22,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:17:22,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:17:24,688 INFO L124 PetriNetUnfolderBase]: 3318/5302 cut-off events. [2024-06-27 21:17:24,688 INFO L125 PetriNetUnfolderBase]: For 362366/362374 co-relation queries the response was YES. [2024-06-27 21:17:24,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33982 conditions, 5302 events. 3318/5302 cut-off events. For 362366/362374 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 31890 event pairs, 884 based on Foata normal form. 14/5312 useless extension candidates. Maximal degree in co-relation 33876. Up to 4288 conditions per place. [2024-06-27 21:17:24,737 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 216 selfloop transitions, 106 changer transitions 0/327 dead transitions. [2024-06-27 21:17:24,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 327 transitions, 4475 flow [2024-06-27 21:17:24,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:17:24,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:17:24,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-27 21:17:24,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318936877076412 [2024-06-27 21:17:24,738 INFO L175 Difference]: Start difference. First operand has 221 places, 302 transitions, 3625 flow. Second operand 7 states and 130 transitions. [2024-06-27 21:17:24,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 327 transitions, 4475 flow [2024-06-27 21:17:25,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 327 transitions, 4335 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-27 21:17:25,211 INFO L231 Difference]: Finished difference. Result has 225 places, 302 transitions, 3705 flow [2024-06-27 21:17:25,212 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} [2024-06-27 21:17:25,212 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 181 predicate places. [2024-06-27 21:17:25,212 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 302 transitions, 3705 flow [2024-06-27 21:17:25,212 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) [2024-06-27 21:17:25,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:17:25,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:17:25,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 21:17:25,213 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:17:25,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:17:25,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1591541944, now seen corresponding path program 7 times [2024-06-27 21:17:25,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:17:25,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520097236] [2024-06-27 21:17:25,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:17:25,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:17:25,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:17:27,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:17:27,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:17:27,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520097236] [2024-06-27 21:17:27,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520097236] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:17:27,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:17:27,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:17:27,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658981999] [2024-06-27 21:17:27,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:17:27,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:17:27,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:17:27,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:17:27,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:17:27,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:17:27,592 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) [2024-06-27 21:17:27,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:17:27,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:17:27,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:17:29,774 INFO L124 PetriNetUnfolderBase]: 3300/5276 cut-off events. [2024-06-27 21:17:29,774 INFO L125 PetriNetUnfolderBase]: For 361653/361653 co-relation queries the response was YES. [2024-06-27 21:17:29,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33695 conditions, 5276 events. 3300/5276 cut-off events. For 361653/361653 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 31710 event pairs, 946 based on Foata normal form. 6/5274 useless extension candidates. Maximal degree in co-relation 33588. Up to 4277 conditions per place. [2024-06-27 21:17:29,824 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 214 selfloop transitions, 116 changer transitions 0/335 dead transitions. [2024-06-27 21:17:29,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 335 transitions, 4721 flow [2024-06-27 21:17:29,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:17:29,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:17:29,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-27 21:17:29,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-06-27 21:17:29,825 INFO L175 Difference]: Start difference. First operand has 225 places, 302 transitions, 3705 flow. Second operand 10 states and 175 transitions. [2024-06-27 21:17:29,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 335 transitions, 4721 flow [2024-06-27 21:17:30,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 335 transitions, 4496 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 21:17:30,271 INFO L231 Difference]: Finished difference. Result has 229 places, 302 transitions, 3719 flow [2024-06-27 21:17:30,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3480, PETRI_DIFFERENCE_MINUEND_PLACES=219, 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=3719, PETRI_PLACES=229, PETRI_TRANSITIONS=302} [2024-06-27 21:17:30,272 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 185 predicate places. [2024-06-27 21:17:30,272 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 302 transitions, 3719 flow [2024-06-27 21:17:30,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:17:30,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:17:30,272 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:17:30,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 21:17:30,272 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:17:30,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:17:30,273 INFO L85 PathProgramCache]: Analyzing trace with hash 1032865278, now seen corresponding path program 8 times [2024-06-27 21:17:30,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:17:30,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704940227] [2024-06-27 21:17:30,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:17:30,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:17:30,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:17:32,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:17:32,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:17:32,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704940227] [2024-06-27 21:17:32,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704940227] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:17:32,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:17:32,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:17:32,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307527567] [2024-06-27 21:17:32,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:17:32,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:17:32,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:17:32,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:17:32,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:17:32,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:17:32,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 302 transitions, 3719 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:17:32,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:17:32,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:17:32,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:17:34,625 INFO L124 PetriNetUnfolderBase]: 3274/5238 cut-off events. [2024-06-27 21:17:34,625 INFO L125 PetriNetUnfolderBase]: For 357577/357577 co-relation queries the response was YES. [2024-06-27 21:17:34,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33282 conditions, 5238 events. 3274/5238 cut-off events. For 357577/357577 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 31464 event pairs, 946 based on Foata normal form. 6/5236 useless extension candidates. Maximal degree in co-relation 33174. Up to 4258 conditions per place. [2024-06-27 21:17:34,673 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 212 selfloop transitions, 112 changer transitions 0/329 dead transitions. [2024-06-27 21:17:34,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 329 transitions, 4581 flow [2024-06-27 21:17:34,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:17:34,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:17:34,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-27 21:17:34,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42151162790697677 [2024-06-27 21:17:34,674 INFO L175 Difference]: Start difference. First operand has 229 places, 302 transitions, 3719 flow. Second operand 8 states and 145 transitions. [2024-06-27 21:17:34,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 329 transitions, 4581 flow [2024-06-27 21:17:35,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 329 transitions, 4240 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-27 21:17:35,130 INFO L231 Difference]: Finished difference. Result has 228 places, 302 transitions, 3611 flow [2024-06-27 21:17:35,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3378, PETRI_DIFFERENCE_MINUEND_PLACES=220, 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=3611, PETRI_PLACES=228, PETRI_TRANSITIONS=302} [2024-06-27 21:17:35,130 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 184 predicate places. [2024-06-27 21:17:35,130 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 302 transitions, 3611 flow [2024-06-27 21:17:35,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:17:35,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:17:35,130 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:17:35,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 21:17:35,130 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:17:35,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:17:35,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1008403144, now seen corresponding path program 9 times [2024-06-27 21:17:35,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:17:35,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629341081] [2024-06-27 21:17:35,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:17:35,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:17:35,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:17:37,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:17:37,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:17:37,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629341081] [2024-06-27 21:17:37,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629341081] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:17:37,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:17:37,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:17:37,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167319677] [2024-06-27 21:17:37,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:17:37,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:17:37,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:17:37,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:17:37,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:17:37,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:17:37,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 302 transitions, 3611 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) [2024-06-27 21:17:37,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:17:37,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:17:37,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:17:38,757 INFO L124 PetriNetUnfolderBase]: 3256/5201 cut-off events. [2024-06-27 21:17:38,757 INFO L125 PetriNetUnfolderBase]: For 348674/348674 co-relation queries the response was YES. [2024-06-27 21:17:38,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32680 conditions, 5201 events. 3256/5201 cut-off events. For 348674/348674 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 31144 event pairs, 782 based on Foata normal form. 6/5199 useless extension candidates. Maximal degree in co-relation 32572. Up to 4535 conditions per place. [2024-06-27 21:17:38,815 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 235 selfloop transitions, 83 changer transitions 0/323 dead transitions. [2024-06-27 21:17:38,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 323 transitions, 4443 flow [2024-06-27 21:17:38,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:17:38,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:17:38,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-27 21:17:38,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40406976744186046 [2024-06-27 21:17:38,816 INFO L175 Difference]: Start difference. First operand has 228 places, 302 transitions, 3611 flow. Second operand 8 states and 139 transitions. [2024-06-27 21:17:38,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 323 transitions, 4443 flow [2024-06-27 21:17:39,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 323 transitions, 4211 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-27 21:17:39,353 INFO L231 Difference]: Finished difference. Result has 229 places, 302 transitions, 3554 flow [2024-06-27 21:17:39,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3379, PETRI_DIFFERENCE_MINUEND_PLACES=221, 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=3554, PETRI_PLACES=229, PETRI_TRANSITIONS=302} [2024-06-27 21:17:39,354 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 185 predicate places. [2024-06-27 21:17:39,354 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 302 transitions, 3554 flow [2024-06-27 21:17:39,354 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) [2024-06-27 21:17:39,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:17:39,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:17:39,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 21:17:39,355 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:17:39,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:17:39,355 INFO L85 PathProgramCache]: Analyzing trace with hash -639800820, now seen corresponding path program 10 times [2024-06-27 21:17:39,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:17:39,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907973570] [2024-06-27 21:17:39,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:17:39,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:17:39,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:17:41,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:17:41,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:17:41,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907973570] [2024-06-27 21:17:41,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907973570] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:17:41,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:17:41,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:17:41,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105161938] [2024-06-27 21:17:41,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:17:41,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:17:41,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:17:41,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:17:41,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:17:41,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:17:41,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 302 transitions, 3554 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) [2024-06-27 21:17:41,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:17:41,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:17:41,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:17:43,138 INFO L124 PetriNetUnfolderBase]: 3204/5133 cut-off events. [2024-06-27 21:17:43,138 INFO L125 PetriNetUnfolderBase]: For 341742/341742 co-relation queries the response was YES. [2024-06-27 21:17:43,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31342 conditions, 5133 events. 3204/5133 cut-off events. For 341742/341742 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 30806 event pairs, 768 based on Foata normal form. 12/5137 useless extension candidates. Maximal degree in co-relation 31233. Up to 4497 conditions per place. [2024-06-27 21:17:43,191 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 233 selfloop transitions, 88 changer transitions 0/326 dead transitions. [2024-06-27 21:17:43,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 326 transitions, 4274 flow [2024-06-27 21:17:43,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:17:43,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:17:43,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-27 21:17:43,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40310077519379844 [2024-06-27 21:17:43,192 INFO L175 Difference]: Start difference. First operand has 229 places, 302 transitions, 3554 flow. Second operand 9 states and 156 transitions. [2024-06-27 21:17:43,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 326 transitions, 4274 flow [2024-06-27 21:17:43,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 326 transitions, 4113 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-27 21:17:43,655 INFO L231 Difference]: Finished difference. Result has 232 places, 302 transitions, 3582 flow [2024-06-27 21:17:43,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3393, PETRI_DIFFERENCE_MINUEND_PLACES=223, 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=3582, PETRI_PLACES=232, PETRI_TRANSITIONS=302} [2024-06-27 21:17:43,655 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 188 predicate places. [2024-06-27 21:17:43,655 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 302 transitions, 3582 flow [2024-06-27 21:17:43,656 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) [2024-06-27 21:17:43,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:17:43,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:17:43,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 21:17:43,656 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:17:43,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:17:43,657 INFO L85 PathProgramCache]: Analyzing trace with hash -300149216, now seen corresponding path program 1 times [2024-06-27 21:17:43,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:17:43,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797897301] [2024-06-27 21:17:43,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:17:43,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:17:43,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:17:46,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:17:46,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:17:46,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797897301] [2024-06-27 21:17:46,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797897301] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:17:46,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:17:46,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:17:46,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785203409] [2024-06-27 21:17:46,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:17:46,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:17:46,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:17:46,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:17:46,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:17:46,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:17:46,689 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 302 transitions, 3582 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:17:46,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:17:46,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:17:46,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:17:48,212 INFO L124 PetriNetUnfolderBase]: 3256/5221 cut-off events. [2024-06-27 21:17:48,212 INFO L125 PetriNetUnfolderBase]: For 356417/356417 co-relation queries the response was YES. [2024-06-27 21:17:48,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31876 conditions, 5221 events. 3256/5221 cut-off events. For 356417/356417 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 31479 event pairs, 784 based on Foata normal form. 14/5227 useless extension candidates. Maximal degree in co-relation 31766. Up to 4837 conditions per place. [2024-06-27 21:17:48,267 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 288 selfloop transitions, 33 changer transitions 0/326 dead transitions. [2024-06-27 21:17:48,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 326 transitions, 4348 flow [2024-06-27 21:17:48,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:17:48,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:17:48,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-27 21:17:48,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4053156146179402 [2024-06-27 21:17:48,268 INFO L175 Difference]: Start difference. First operand has 232 places, 302 transitions, 3582 flow. Second operand 7 states and 122 transitions. [2024-06-27 21:17:48,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 326 transitions, 4348 flow [2024-06-27 21:17:48,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 326 transitions, 4086 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-27 21:17:48,846 INFO L231 Difference]: Finished difference. Result has 229 places, 304 transitions, 3425 flow [2024-06-27 21:17:48,846 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} [2024-06-27 21:17:48,847 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 185 predicate places. [2024-06-27 21:17:48,847 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 304 transitions, 3425 flow [2024-06-27 21:17:48,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:17:48,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:17:48,847 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] [2024-06-27 21:17:48,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 21:17:48,847 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:17:48,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:17:48,847 INFO L85 PathProgramCache]: Analyzing trace with hash -299644226, now seen corresponding path program 2 times [2024-06-27 21:17:48,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:17:48,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692048140] [2024-06-27 21:17:48,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:17:48,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:17:48,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:17:52,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:17:52,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:17:52,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692048140] [2024-06-27 21:17:52,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692048140] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:17:52,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:17:52,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:17:52,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113016345] [2024-06-27 21:17:52,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:17:52,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:17:52,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:17:52,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:17:52,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:17:52,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:17:52,118 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) [2024-06-27 21:17:52,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:17:52,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:17:52,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:17:53,515 INFO L124 PetriNetUnfolderBase]: 3317/5312 cut-off events. [2024-06-27 21:17:53,515 INFO L125 PetriNetUnfolderBase]: For 363807/363807 co-relation queries the response was YES. [2024-06-27 21:17:53,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32647 conditions, 5312 events. 3317/5312 cut-off events. For 363807/363807 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 31992 event pairs, 815 based on Foata normal form. 8/5312 useless extension candidates. Maximal degree in co-relation 32536. Up to 4777 conditions per place. [2024-06-27 21:17:53,575 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 295 selfloop transitions, 32 changer transitions 0/332 dead transitions. [2024-06-27 21:17:53,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 332 transitions, 4375 flow [2024-06-27 21:17:53,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:17:53,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:17:53,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-27 21:17:53,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40863787375415284 [2024-06-27 21:17:53,576 INFO L175 Difference]: Start difference. First operand has 229 places, 304 transitions, 3425 flow. Second operand 7 states and 123 transitions. [2024-06-27 21:17:53,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 332 transitions, 4375 flow [2024-06-27 21:17:53,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 332 transitions, 4294 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-27 21:17:53,953 INFO L231 Difference]: Finished difference. Result has 231 places, 306 transitions, 3446 flow [2024-06-27 21:17:53,954 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} [2024-06-27 21:17:53,954 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 187 predicate places. [2024-06-27 21:17:53,954 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 306 transitions, 3446 flow [2024-06-27 21:17:53,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:17:53,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:17:53,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:17:53,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 21:17:53,954 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:17:53,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:17:53,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1024282440, now seen corresponding path program 1 times [2024-06-27 21:17:53,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:17:53,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741937215] [2024-06-27 21:17:53,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:17:53,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:17:53,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:17:56,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:17:56,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:17:56,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741937215] [2024-06-27 21:17:56,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741937215] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:17:56,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:17:56,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:17:56,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273775429] [2024-06-27 21:17:56,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:17:56,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:17:56,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:17:56,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:17:56,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:17:56,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:17:56,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 306 transitions, 3446 flow. Second operand has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:17:56,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:17:56,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:17:56,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:17:57,861 INFO L124 PetriNetUnfolderBase]: 3325/5335 cut-off events. [2024-06-27 21:17:57,861 INFO L125 PetriNetUnfolderBase]: For 359297/359299 co-relation queries the response was YES. [2024-06-27 21:17:57,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32858 conditions, 5335 events. 3325/5335 cut-off events. For 359297/359299 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 32271 event pairs, 865 based on Foata normal form. 4/5338 useless extension candidates. Maximal degree in co-relation 32746. Up to 5020 conditions per place. [2024-06-27 21:17:57,913 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 299 selfloop transitions, 30 changer transitions 0/334 dead transitions. [2024-06-27 21:17:57,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 334 transitions, 4398 flow [2024-06-27 21:17:57,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:17:57,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:17:57,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-27 21:17:57,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4053156146179402 [2024-06-27 21:17:57,914 INFO L175 Difference]: Start difference. First operand has 231 places, 306 transitions, 3446 flow. Second operand 7 states and 122 transitions. [2024-06-27 21:17:57,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 334 transitions, 4398 flow [2024-06-27 21:17:58,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 334 transitions, 4355 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-27 21:17:58,449 INFO L231 Difference]: Finished difference. Result has 235 places, 310 transitions, 3544 flow [2024-06-27 21:17:58,449 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} [2024-06-27 21:17:58,449 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 191 predicate places. [2024-06-27 21:17:58,449 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 310 transitions, 3544 flow [2024-06-27 21:17:58,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:17:58,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:17:58,450 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:17:58,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 21:17:58,450 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:17:58,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:17:58,450 INFO L85 PathProgramCache]: Analyzing trace with hash 429927176, now seen corresponding path program 2 times [2024-06-27 21:17:58,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:17:58,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830313548] [2024-06-27 21:17:58,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:17:58,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:17:58,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:18:00,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:18:00,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:18:00,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830313548] [2024-06-27 21:18:00,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830313548] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:18:00,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:18:00,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:18:00,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045467224] [2024-06-27 21:18:00,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:18:00,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:18:00,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:18:00,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:18:00,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:18:00,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:18:00,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 310 transitions, 3544 flow. Second operand has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:18:00,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:18:00,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:18:00,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:18:02,418 INFO L124 PetriNetUnfolderBase]: 3333/5353 cut-off events. [2024-06-27 21:18:02,418 INFO L125 PetriNetUnfolderBase]: For 369433/369435 co-relation queries the response was YES. [2024-06-27 21:18:02,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33234 conditions, 5353 events. 3333/5353 cut-off events. For 369433/369435 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 32514 event pairs, 901 based on Foata normal form. 4/5356 useless extension candidates. Maximal degree in co-relation 33120. Up to 5069 conditions per place. [2024-06-27 21:18:02,475 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 299 selfloop transitions, 27 changer transitions 0/331 dead transitions. [2024-06-27 21:18:02,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 331 transitions, 4296 flow [2024-06-27 21:18:02,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:18:02,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:18:02,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-27 21:18:02,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38870431893687707 [2024-06-27 21:18:02,481 INFO L175 Difference]: Start difference. First operand has 235 places, 310 transitions, 3544 flow. Second operand 7 states and 117 transitions. [2024-06-27 21:18:02,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 331 transitions, 4296 flow [2024-06-27 21:18:02,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 331 transitions, 4204 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-27 21:18:02,899 INFO L231 Difference]: Finished difference. Result has 239 places, 312 transitions, 3555 flow [2024-06-27 21:18:02,899 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} [2024-06-27 21:18:02,899 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 195 predicate places. [2024-06-27 21:18:02,900 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 312 transitions, 3555 flow [2024-06-27 21:18:02,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:18:02,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:18:02,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:18:02,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 21:18:02,900 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:18:02,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:18:02,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1591265114, now seen corresponding path program 3 times [2024-06-27 21:18:02,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:18:02,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894764190] [2024-06-27 21:18:02,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:18:02,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:18:02,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:18:05,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:18:05,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:18:05,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894764190] [2024-06-27 21:18:05,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894764190] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:18:05,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:18:05,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:18:05,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874376800] [2024-06-27 21:18:05,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:18:05,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:18:05,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:18:05,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:18:05,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:18:05,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:18:05,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 312 transitions, 3555 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:18:05,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:18:05,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:18:05,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:18:07,505 INFO L124 PetriNetUnfolderBase]: 3341/5363 cut-off events. [2024-06-27 21:18:07,505 INFO L125 PetriNetUnfolderBase]: For 378865/378865 co-relation queries the response was YES. [2024-06-27 21:18:07,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33397 conditions, 5363 events. 3341/5363 cut-off events. For 378865/378865 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 32517 event pairs, 916 based on Foata normal form. 2/5363 useless extension candidates. Maximal degree in co-relation 33281. Up to 5081 conditions per place. [2024-06-27 21:18:07,566 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 300 selfloop transitions, 29 changer transitions 0/334 dead transitions. [2024-06-27 21:18:07,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 334 transitions, 4303 flow [2024-06-27 21:18:07,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:18:07,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:18:07,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-27 21:18:07,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-27 21:18:07,568 INFO L175 Difference]: Start difference. First operand has 239 places, 312 transitions, 3555 flow. Second operand 8 states and 129 transitions. [2024-06-27 21:18:07,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 334 transitions, 4303 flow [2024-06-27 21:18:08,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 334 transitions, 4236 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-27 21:18:08,237 INFO L231 Difference]: Finished difference. Result has 242 places, 314 transitions, 3583 flow [2024-06-27 21:18:08,237 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} [2024-06-27 21:18:08,237 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 198 predicate places. [2024-06-27 21:18:08,237 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 314 transitions, 3583 flow [2024-06-27 21:18:08,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:18:08,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:18:08,238 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:18:08,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 21:18:08,238 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:18:08,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:18:08,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1142615268, now seen corresponding path program 1 times [2024-06-27 21:18:08,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:18:08,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875725967] [2024-06-27 21:18:08,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:18:08,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:18:08,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:18:11,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:18:11,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:18:11,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875725967] [2024-06-27 21:18:11,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875725967] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:18:11,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:18:11,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:18:11,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657213705] [2024-06-27 21:18:11,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:18:11,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:18:11,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:18:11,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:18:11,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:18:11,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:18:11,704 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) [2024-06-27 21:18:11,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:18:11,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:18:11,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:18:13,457 INFO L124 PetriNetUnfolderBase]: 3357/5381 cut-off events. [2024-06-27 21:18:13,457 INFO L125 PetriNetUnfolderBase]: For 395081/395081 co-relation queries the response was YES. [2024-06-27 21:18:13,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33731 conditions, 5381 events. 3357/5381 cut-off events. For 395081/395081 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 32568 event pairs, 1006 based on Foata normal form. 4/5376 useless extension candidates. Maximal degree in co-relation 33614. Up to 4415 conditions per place. [2024-06-27 21:18:13,516 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 220 selfloop transitions, 116 changer transitions 0/341 dead transitions. [2024-06-27 21:18:13,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 341 transitions, 4391 flow [2024-06-27 21:18:13,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:18:13,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:18:13,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-27 21:18:13,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-06-27 21:18:13,517 INFO L175 Difference]: Start difference. First operand has 242 places, 314 transitions, 3583 flow. Second operand 8 states and 140 transitions. [2024-06-27 21:18:13,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 341 transitions, 4391 flow [2024-06-27 21:18:14,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 341 transitions, 4316 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-27 21:18:14,041 INFO L231 Difference]: Finished difference. Result has 244 places, 317 transitions, 3814 flow [2024-06-27 21:18:14,041 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} [2024-06-27 21:18:14,041 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 200 predicate places. [2024-06-27 21:18:14,041 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 317 transitions, 3814 flow [2024-06-27 21:18:14,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:18:14,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:18:14,042 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:18:14,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-27 21:18:14,042 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:18:14,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:18:14,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1008413064, now seen corresponding path program 4 times [2024-06-27 21:18:14,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:18:14,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903825854] [2024-06-27 21:18:14,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:18:14,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:18:14,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:18:16,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:18:16,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:18:16,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903825854] [2024-06-27 21:18:16,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903825854] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:18:16,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:18:16,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:18:16,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447542383] [2024-06-27 21:18:16,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:18:16,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:18:16,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:18:16,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:18:16,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:18:16,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:18:16,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 317 transitions, 3814 flow. Second operand has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:18:16,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:18:16,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:18:16,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:18:17,952 INFO L124 PetriNetUnfolderBase]: 3352/5381 cut-off events. [2024-06-27 21:18:17,952 INFO L125 PetriNetUnfolderBase]: For 396325/396325 co-relation queries the response was YES. [2024-06-27 21:18:17,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34321 conditions, 5381 events. 3352/5381 cut-off events. For 396325/396325 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 32660 event pairs, 956 based on Foata normal form. 2/5382 useless extension candidates. Maximal degree in co-relation 34203. Up to 5148 conditions per place. [2024-06-27 21:18:18,001 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 311 selfloop transitions, 16 changer transitions 0/332 dead transitions. [2024-06-27 21:18:18,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 332 transitions, 4512 flow [2024-06-27 21:18:18,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:18:18,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:18:18,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-27 21:18:18,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35174418604651164 [2024-06-27 21:18:18,002 INFO L175 Difference]: Start difference. First operand has 244 places, 317 transitions, 3814 flow. Second operand 8 states and 121 transitions. [2024-06-27 21:18:18,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 332 transitions, 4512 flow [2024-06-27 21:18:18,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 332 transitions, 4214 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-27 21:18:18,527 INFO L231 Difference]: Finished difference. Result has 246 places, 317 transitions, 3553 flow [2024-06-27 21:18:18,527 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} [2024-06-27 21:18:18,527 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 202 predicate places. [2024-06-27 21:18:18,527 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 317 transitions, 3553 flow [2024-06-27 21:18:18,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:18:18,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:18:18,528 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:18:18,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-27 21:18:18,528 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:18:18,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:18:18,528 INFO L85 PathProgramCache]: Analyzing trace with hash -299933952, now seen corresponding path program 2 times [2024-06-27 21:18:18,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:18:18,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068186469] [2024-06-27 21:18:18,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:18:18,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:18:18,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:18:22,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:18:22,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:18:22,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068186469] [2024-06-27 21:18:22,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068186469] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:18:22,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:18:22,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:18:22,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769108265] [2024-06-27 21:18:22,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:18:22,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:18:22,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:18:22,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:18:22,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:18:22,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:18:22,074 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) [2024-06-27 21:18:22,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:18:22,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:18:22,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:18:24,018 INFO L124 PetriNetUnfolderBase]: 3404/5443 cut-off events. [2024-06-27 21:18:24,019 INFO L125 PetriNetUnfolderBase]: For 440509/440509 co-relation queries the response was YES. [2024-06-27 21:18:24,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34349 conditions, 5443 events. 3404/5443 cut-off events. For 440509/440509 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 32882 event pairs, 796 based on Foata normal form. 14/5449 useless extension candidates. Maximal degree in co-relation 34230. Up to 4751 conditions per place. [2024-06-27 21:18:24,069 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 247 selfloop transitions, 96 changer transitions 0/348 dead transitions. [2024-06-27 21:18:24,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 348 transitions, 4395 flow [2024-06-27 21:18:24,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:18:24,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:18:24,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 172 transitions. [2024-06-27 21:18:24,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-27 21:18:24,070 INFO L175 Difference]: Start difference. First operand has 246 places, 317 transitions, 3553 flow. Second operand 10 states and 172 transitions. [2024-06-27 21:18:24,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 348 transitions, 4395 flow [2024-06-27 21:18:24,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 348 transitions, 4344 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-27 21:18:24,657 INFO L231 Difference]: Finished difference. Result has 249 places, 320 transitions, 3776 flow [2024-06-27 21:18:24,657 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} [2024-06-27 21:18:24,657 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 205 predicate places. [2024-06-27 21:18:24,657 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 320 transitions, 3776 flow [2024-06-27 21:18:24,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:18:24,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:18:24,658 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:18:24,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-27 21:18:24,658 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:18:24,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:18:24,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1198699030, now seen corresponding path program 3 times [2024-06-27 21:18:24,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:18:24,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406818827] [2024-06-27 21:18:24,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:18:24,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:18:24,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:18:27,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:18:27,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:18:27,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406818827] [2024-06-27 21:18:27,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406818827] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:18:27,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:18:27,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:18:27,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848506371] [2024-06-27 21:18:27,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:18:27,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:18:27,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:18:27,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:18:27,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:18:27,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:18:27,766 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) [2024-06-27 21:18:27,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:18:27,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:18:27,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:18:29,273 INFO L124 PetriNetUnfolderBase]: 3456/5527 cut-off events. [2024-06-27 21:18:29,273 INFO L125 PetriNetUnfolderBase]: For 457438/457438 co-relation queries the response was YES. [2024-06-27 21:18:29,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35752 conditions, 5527 events. 3456/5527 cut-off events. For 457438/457438 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 33434 event pairs, 818 based on Foata normal form. 14/5533 useless extension candidates. Maximal degree in co-relation 35632. Up to 4831 conditions per place. [2024-06-27 21:18:29,337 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 254 selfloop transitions, 89 changer transitions 0/348 dead transitions. [2024-06-27 21:18:29,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 348 transitions, 4618 flow [2024-06-27 21:18:29,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:18:29,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:18:29,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-27 21:18:29,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4005167958656331 [2024-06-27 21:18:29,338 INFO L175 Difference]: Start difference. First operand has 249 places, 320 transitions, 3776 flow. Second operand 9 states and 155 transitions. [2024-06-27 21:18:29,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 348 transitions, 4618 flow [2024-06-27 21:18:29,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 348 transitions, 4376 flow, removed 28 selfloop flow, removed 8 redundant places. [2024-06-27 21:18:29,903 INFO L231 Difference]: Finished difference. Result has 250 places, 323 transitions, 3800 flow [2024-06-27 21:18:29,903 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=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3800, PETRI_PLACES=250, PETRI_TRANSITIONS=323} [2024-06-27 21:18:29,904 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 206 predicate places. [2024-06-27 21:18:29,904 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 323 transitions, 3800 flow [2024-06-27 21:18:29,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:18:29,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:18:29,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:18:29,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-27 21:18:29,904 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:18:29,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:18:29,905 INFO L85 PathProgramCache]: Analyzing trace with hash -196213822, now seen corresponding path program 4 times [2024-06-27 21:18:29,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:18:29,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851372248] [2024-06-27 21:18:29,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:18:29,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:18:29,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:18:33,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:18:33,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:18:33,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851372248] [2024-06-27 21:18:33,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851372248] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:18:33,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:18:33,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:18:33,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965527369] [2024-06-27 21:18:33,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:18:33,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:18:33,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:18:33,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:18:33,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:18:33,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:18:33,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 323 transitions, 3800 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:18:33,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:18:33,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:18:33,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:18:35,346 INFO L124 PetriNetUnfolderBase]: 3891/6204 cut-off events. [2024-06-27 21:18:35,347 INFO L125 PetriNetUnfolderBase]: For 676096/676096 co-relation queries the response was YES. [2024-06-27 21:18:35,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43761 conditions, 6204 events. 3891/6204 cut-off events. For 676096/676096 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 37740 event pairs, 957 based on Foata normal form. 14/6210 useless extension candidates. Maximal degree in co-relation 43640. Up to 4668 conditions per place. [2024-06-27 21:18:35,419 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 258 selfloop transitions, 102 changer transitions 0/365 dead transitions. [2024-06-27 21:18:35,420 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 365 transitions, 4936 flow [2024-06-27 21:18:35,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:18:35,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:18:35,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 179 transitions. [2024-06-27 21:18:35,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41627906976744183 [2024-06-27 21:18:35,421 INFO L175 Difference]: Start difference. First operand has 250 places, 323 transitions, 3800 flow. Second operand 10 states and 179 transitions. [2024-06-27 21:18:35,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 365 transitions, 4936 flow [2024-06-27 21:18:36,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 365 transitions, 4702 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-27 21:18:36,491 INFO L231 Difference]: Finished difference. Result has 254 places, 329 transitions, 3946 flow [2024-06-27 21:18:36,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3566, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3946, PETRI_PLACES=254, PETRI_TRANSITIONS=329} [2024-06-27 21:18:36,492 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 210 predicate places. [2024-06-27 21:18:36,492 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 329 transitions, 3946 flow [2024-06-27 21:18:36,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:18:36,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:18:36,492 INFO 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] [2024-06-27 21:18:36,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-27 21:18:36,492 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:18:36,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:18:36,493 INFO L85 PathProgramCache]: Analyzing trace with hash 611191391, now seen corresponding path program 1 times [2024-06-27 21:18:36,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:18:36,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934474364] [2024-06-27 21:18:36,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:18:36,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:18:36,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:18:39,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:18:39,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:18:39,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934474364] [2024-06-27 21:18:39,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934474364] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:18:39,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:18:39,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:18:39,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865630686] [2024-06-27 21:18:39,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:18:39,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:18:39,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:18:39,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:18:39,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:18:39,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:18:39,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 329 transitions, 3946 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:18:39,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:18:39,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:18:39,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:18:41,458 INFO L124 PetriNetUnfolderBase]: 3906/6248 cut-off events. [2024-06-27 21:18:41,458 INFO L125 PetriNetUnfolderBase]: For 640727/640727 co-relation queries the response was YES. [2024-06-27 21:18:41,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43870 conditions, 6248 events. 3906/6248 cut-off events. For 640727/640727 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 38219 event pairs, 958 based on Foata normal form. 2/6249 useless extension candidates. Maximal degree in co-relation 43747. Up to 5764 conditions per place. [2024-06-27 21:18:41,532 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 329 selfloop transitions, 42 changer transitions 0/376 dead transitions. [2024-06-27 21:18:41,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 376 transitions, 5074 flow [2024-06-27 21:18:41,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:18:41,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:18:41,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-27 21:18:41,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4563953488372093 [2024-06-27 21:18:41,534 INFO L175 Difference]: Start difference. First operand has 254 places, 329 transitions, 3946 flow. Second operand 8 states and 157 transitions. [2024-06-27 21:18:41,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 376 transitions, 5074 flow [2024-06-27 21:18:42,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 376 transitions, 4874 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-27 21:18:42,753 INFO L231 Difference]: Finished difference. Result has 257 places, 334 transitions, 3939 flow [2024-06-27 21:18:42,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3746, 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=3939, PETRI_PLACES=257, PETRI_TRANSITIONS=334} [2024-06-27 21:18:42,753 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 213 predicate places. [2024-06-27 21:18:42,754 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 334 transitions, 3939 flow [2024-06-27 21:18:42,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:18:42,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:18:42,754 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:18:42,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-27 21:18:42,754 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:18:42,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:18:42,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1159141723, now seen corresponding path program 2 times [2024-06-27 21:18:42,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:18:42,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665189659] [2024-06-27 21:18:42,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:18:42,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:18:42,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:18:45,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:18:45,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:18:45,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665189659] [2024-06-27 21:18:45,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665189659] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:18:45,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:18:45,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:18:45,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113386397] [2024-06-27 21:18:45,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:18:45,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:18:45,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:18:45,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:18:45,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:18:45,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:18:45,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 334 transitions, 3939 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:18:45,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:18:45,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:18:45,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:18:47,593 INFO L124 PetriNetUnfolderBase]: 3919/6269 cut-off events. [2024-06-27 21:18:47,593 INFO L125 PetriNetUnfolderBase]: For 661858/661858 co-relation queries the response was YES. [2024-06-27 21:18:47,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43905 conditions, 6269 events. 3919/6269 cut-off events. For 661858/661858 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 38461 event pairs, 1115 based on Foata normal form. 2/6270 useless extension candidates. Maximal degree in co-relation 43779. Up to 5911 conditions per place. [2024-06-27 21:18:47,666 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 327 selfloop transitions, 39 changer transitions 0/371 dead transitions. [2024-06-27 21:18:47,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 371 transitions, 4853 flow [2024-06-27 21:18:47,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:18:47,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:18:47,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-27 21:18:47,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-27 21:18:47,667 INFO L175 Difference]: Start difference. First operand has 257 places, 334 transitions, 3939 flow. Second operand 8 states and 147 transitions. [2024-06-27 21:18:47,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 371 transitions, 4853 flow [2024-06-27 21:18:48,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 371 transitions, 4666 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-27 21:18:48,695 INFO L231 Difference]: Finished difference. Result has 261 places, 339 transitions, 3919 flow [2024-06-27 21:18:48,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3772, 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=3919, PETRI_PLACES=261, PETRI_TRANSITIONS=339} [2024-06-27 21:18:48,695 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 217 predicate places. [2024-06-27 21:18:48,695 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 339 transitions, 3919 flow [2024-06-27 21:18:48,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:18:48,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:18:48,696 INFO 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] [2024-06-27 21:18:48,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-27 21:18:48,696 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:18:48,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:18:48,696 INFO L85 PathProgramCache]: Analyzing trace with hash 18689241, now seen corresponding path program 1 times [2024-06-27 21:18:48,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:18:48,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545719960] [2024-06-27 21:18:48,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:18:48,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:18:48,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:18:51,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:18:51,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:18:51,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545719960] [2024-06-27 21:18:51,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545719960] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:18:51,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:18:51,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:18:51,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870903933] [2024-06-27 21:18:51,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:18:51,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:18:51,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:18:51,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:18:51,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:18:51,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:18:51,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 339 transitions, 3919 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:18:51,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:18:51,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:18:51,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:18:53,402 INFO L124 PetriNetUnfolderBase]: 3940/6303 cut-off events. [2024-06-27 21:18:53,402 INFO L125 PetriNetUnfolderBase]: For 680359/680359 co-relation queries the response was YES. [2024-06-27 21:18:53,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44292 conditions, 6303 events. 3940/6303 cut-off events. For 680359/680359 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 38800 event pairs, 1085 based on Foata normal form. 1/6303 useless extension candidates. Maximal degree in co-relation 44165. Up to 5814 conditions per place. [2024-06-27 21:18:53,478 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 321 selfloop transitions, 64 changer transitions 0/390 dead transitions. [2024-06-27 21:18:53,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 390 transitions, 5102 flow [2024-06-27 21:18:53,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:18:53,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:18:53,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-27 21:18:53,480 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45219638242894056 [2024-06-27 21:18:53,480 INFO L175 Difference]: Start difference. First operand has 261 places, 339 transitions, 3919 flow. Second operand 9 states and 175 transitions. [2024-06-27 21:18:53,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 390 transitions, 5102 flow [2024-06-27 21:18:54,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 390 transitions, 5013 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-27 21:18:54,326 INFO L231 Difference]: Finished difference. Result has 266 places, 345 transitions, 4093 flow [2024-06-27 21:18:54,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3830, 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=4093, PETRI_PLACES=266, PETRI_TRANSITIONS=345} [2024-06-27 21:18:54,326 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 222 predicate places. [2024-06-27 21:18:54,326 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 345 transitions, 4093 flow [2024-06-27 21:18:54,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:18:54,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:18:54,326 INFO 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] [2024-06-27 21:18:54,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-27 21:18:54,327 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:18:54,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:18:54,327 INFO L85 PathProgramCache]: Analyzing trace with hash -28583845, now seen corresponding path program 3 times [2024-06-27 21:18:54,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:18:54,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657023070] [2024-06-27 21:18:54,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:18:54,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:18:54,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:18:57,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:18:57,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:18:57,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657023070] [2024-06-27 21:18:57,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657023070] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:18:57,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:18:57,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:18:57,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337575130] [2024-06-27 21:18:57,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:18:57,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:18:57,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:18:57,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:18:57,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:18:57,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:18:57,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 345 transitions, 4093 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:18:57,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:18:57,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:18:57,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:18:59,318 INFO L124 PetriNetUnfolderBase]: 3935/6289 cut-off events. [2024-06-27 21:18:59,318 INFO L125 PetriNetUnfolderBase]: For 695514/695514 co-relation queries the response was YES. [2024-06-27 21:18:59,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45032 conditions, 6289 events. 3935/6289 cut-off events. For 695514/695514 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 38603 event pairs, 1080 based on Foata normal form. 2/6290 useless extension candidates. Maximal degree in co-relation 44903. Up to 5933 conditions per place. [2024-06-27 21:18:59,394 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 326 selfloop transitions, 39 changer transitions 0/370 dead transitions. [2024-06-27 21:18:59,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 370 transitions, 4914 flow [2024-06-27 21:18:59,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:18:59,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:18:59,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-27 21:18:59,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4011627906976744 [2024-06-27 21:18:59,395 INFO L175 Difference]: Start difference. First operand has 266 places, 345 transitions, 4093 flow. Second operand 8 states and 138 transitions. [2024-06-27 21:18:59,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 370 transitions, 4914 flow [2024-06-27 21:19:00,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 370 transitions, 4682 flow, removed 51 selfloop flow, removed 5 redundant places. [2024-06-27 21:19:00,251 INFO L231 Difference]: Finished difference. Result has 270 places, 346 transitions, 3971 flow [2024-06-27 21:19:00,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3864, 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=3971, PETRI_PLACES=270, PETRI_TRANSITIONS=346} [2024-06-27 21:19:00,252 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 226 predicate places. [2024-06-27 21:19:00,252 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 346 transitions, 3971 flow [2024-06-27 21:19:00,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:19:00,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:19:00,252 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:19:00,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-27 21:19:00,252 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:19:00,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:19:00,252 INFO L85 PathProgramCache]: Analyzing trace with hash 309738875, now seen corresponding path program 2 times [2024-06-27 21:19:00,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:19:00,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885923946] [2024-06-27 21:19:00,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:19:00,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:19:00,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:19:03,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:19:03,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:19:03,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885923946] [2024-06-27 21:19:03,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885923946] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:19:03,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:19:03,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:19:03,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418322666] [2024-06-27 21:19:03,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:19:03,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:19:03,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:19:03,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:19:03,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:19:03,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:19:03,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 346 transitions, 3971 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:19:03,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:19:03,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:19:03,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:19:05,402 INFO L124 PetriNetUnfolderBase]: 4012/6416 cut-off events. [2024-06-27 21:19:05,403 INFO L125 PetriNetUnfolderBase]: For 741791/741791 co-relation queries the response was YES. [2024-06-27 21:19:05,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46296 conditions, 6416 events. 4012/6416 cut-off events. For 741791/741791 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 39550 event pairs, 918 based on Foata normal form. 1/6415 useless extension candidates. Maximal degree in co-relation 46165. Up to 4713 conditions per place. [2024-06-27 21:19:05,479 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 224 selfloop transitions, 172 changer transitions 0/401 dead transitions. [2024-06-27 21:19:05,479 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 401 transitions, 5704 flow [2024-06-27 21:19:05,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:19:05,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:19:05,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-27 21:19:05,480 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4680232558139535 [2024-06-27 21:19:05,480 INFO L175 Difference]: Start difference. First operand has 270 places, 346 transitions, 3971 flow. Second operand 8 states and 161 transitions. [2024-06-27 21:19:05,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 401 transitions, 5704 flow [2024-06-27 21:19:06,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 401 transitions, 5615 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-27 21:19:06,413 INFO L231 Difference]: Finished difference. Result has 274 places, 360 transitions, 4488 flow [2024-06-27 21:19:06,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3882, 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=4488, PETRI_PLACES=274, PETRI_TRANSITIONS=360} [2024-06-27 21:19:06,413 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 230 predicate places. [2024-06-27 21:19:06,414 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 360 transitions, 4488 flow [2024-06-27 21:19:06,414 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) [2024-06-27 21:19:06,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:19:06,414 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] [2024-06-27 21:19:06,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-27 21:19:06,414 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:19:06,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:19:06,414 INFO L85 PathProgramCache]: Analyzing trace with hash 310095065, now seen corresponding path program 3 times [2024-06-27 21:19:06,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:19:06,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188697170] [2024-06-27 21:19:06,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:19:06,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:19:06,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:19:09,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:19:09,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:19:09,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188697170] [2024-06-27 21:19:09,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188697170] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:19:09,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:19:09,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:19:09,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905921964] [2024-06-27 21:19:09,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:19:09,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:19:09,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:19:09,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:19:09,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:19:09,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:19:09,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 360 transitions, 4488 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:19:09,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:19:09,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:19:09,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:19:11,391 INFO L124 PetriNetUnfolderBase]: 4017/6425 cut-off events. [2024-06-27 21:19:11,391 INFO L125 PetriNetUnfolderBase]: For 765771/765771 co-relation queries the response was YES. [2024-06-27 21:19:11,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48052 conditions, 6425 events. 4017/6425 cut-off events. For 765771/765771 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 39599 event pairs, 918 based on Foata normal form. 1/6424 useless extension candidates. Maximal degree in co-relation 47919. Up to 4715 conditions per place. [2024-06-27 21:19:11,472 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 219 selfloop transitions, 175 changer transitions 0/399 dead transitions. [2024-06-27 21:19:11,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 399 transitions, 6062 flow [2024-06-27 21:19:11,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:19:11,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:19:11,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-27 21:19:11,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45058139534883723 [2024-06-27 21:19:11,474 INFO L175 Difference]: Start difference. First operand has 274 places, 360 transitions, 4488 flow. Second operand 8 states and 155 transitions. [2024-06-27 21:19:11,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 399 transitions, 6062 flow [2024-06-27 21:19:12,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 399 transitions, 5879 flow, removed 73 selfloop flow, removed 2 redundant places. [2024-06-27 21:19:12,677 INFO L231 Difference]: Finished difference. Result has 280 places, 363 transitions, 4742 flow [2024-06-27 21:19:12,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4331, 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=4742, PETRI_PLACES=280, PETRI_TRANSITIONS=363} [2024-06-27 21:19:12,678 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 236 predicate places. [2024-06-27 21:19:12,678 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 363 transitions, 4742 flow [2024-06-27 21:19:12,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:19:12,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:19:12,678 INFO 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] [2024-06-27 21:19:12,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-27 21:19:12,678 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:19:12,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:19:12,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1506204889, now seen corresponding path program 4 times [2024-06-27 21:19:12,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:19:12,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300454241] [2024-06-27 21:19:12,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:19:12,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:19:12,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:19:15,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:19:15,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:19:15,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300454241] [2024-06-27 21:19:15,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300454241] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:19:15,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:19:15,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:19:15,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151304405] [2024-06-27 21:19:15,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:19:15,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:19:15,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:19:15,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:19:15,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:19:15,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:19:15,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 363 transitions, 4742 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:19:15,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:19:15,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:19:15,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:19:17,381 INFO L124 PetriNetUnfolderBase]: 4038/6451 cut-off events. [2024-06-27 21:19:17,381 INFO L125 PetriNetUnfolderBase]: For 787654/787654 co-relation queries the response was YES. [2024-06-27 21:19:17,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48277 conditions, 6451 events. 4038/6451 cut-off events. For 787654/787654 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 39815 event pairs, 1092 based on Foata normal form. 1/6451 useless extension candidates. Maximal degree in co-relation 48141. Up to 6045 conditions per place. [2024-06-27 21:19:17,465 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 337 selfloop transitions, 53 changer transitions 0/395 dead transitions. [2024-06-27 21:19:17,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 395 transitions, 5887 flow [2024-06-27 21:19:17,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:19:17,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:19:17,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-27 21:19:17,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3979328165374677 [2024-06-27 21:19:17,466 INFO L175 Difference]: Start difference. First operand has 280 places, 363 transitions, 4742 flow. Second operand 9 states and 154 transitions. [2024-06-27 21:19:17,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 395 transitions, 5887 flow [2024-06-27 21:19:19,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 395 transitions, 5528 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-27 21:19:19,029 INFO L231 Difference]: Finished difference. Result has 285 places, 369 transitions, 4631 flow [2024-06-27 21:19:19,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4392, 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=4631, PETRI_PLACES=285, PETRI_TRANSITIONS=369} [2024-06-27 21:19:19,030 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 241 predicate places. [2024-06-27 21:19:19,030 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 369 transitions, 4631 flow [2024-06-27 21:19:19,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:19:19,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:19:19,030 INFO 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] [2024-06-27 21:19:19,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-27 21:19:19,030 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:19:19,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:19:19,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1372101115, now seen corresponding path program 5 times [2024-06-27 21:19:19,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:19:19,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294686105] [2024-06-27 21:19:19,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:19:19,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:19:19,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:19:21,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:19:21,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:19:21,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294686105] [2024-06-27 21:19:21,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294686105] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:19:21,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:19:21,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:19:21,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149373360] [2024-06-27 21:19:21,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:19:21,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:19:21,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:19:21,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:19:21,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:19:21,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:19:21,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 369 transitions, 4631 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:19:21,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:19:21,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:19:21,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:19:24,096 INFO L124 PetriNetUnfolderBase]: 4043/6449 cut-off events. [2024-06-27 21:19:24,096 INFO L125 PetriNetUnfolderBase]: For 804405/804405 co-relation queries the response was YES. [2024-06-27 21:19:24,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47959 conditions, 6449 events. 4043/6449 cut-off events. For 804405/804405 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 39780 event pairs, 1142 based on Foata normal form. 1/6436 useless extension candidates. Maximal degree in co-relation 47821. Up to 4728 conditions per place. [2024-06-27 21:19:24,181 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 242 selfloop transitions, 167 changer transitions 0/414 dead transitions. [2024-06-27 21:19:24,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 414 transitions, 6326 flow [2024-06-27 21:19:24,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:19:24,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:19:24,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-27 21:19:24,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44476744186046513 [2024-06-27 21:19:24,184 INFO L175 Difference]: Start difference. First operand has 285 places, 369 transitions, 4631 flow. Second operand 8 states and 153 transitions. [2024-06-27 21:19:24,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 414 transitions, 6326 flow [2024-06-27 21:19:25,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 414 transitions, 6183 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-27 21:19:25,715 INFO L231 Difference]: Finished difference. Result has 287 places, 379 transitions, 5074 flow [2024-06-27 21:19:25,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4488, 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=5074, PETRI_PLACES=287, PETRI_TRANSITIONS=379} [2024-06-27 21:19:25,716 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 243 predicate places. [2024-06-27 21:19:25,716 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 379 transitions, 5074 flow [2024-06-27 21:19:25,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:19:25,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:19:25,716 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] [2024-06-27 21:19:25,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-27 21:19:25,716 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:19:25,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:19:25,717 INFO L85 PathProgramCache]: Analyzing trace with hash 1891179201, now seen corresponding path program 6 times [2024-06-27 21:19:25,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:19:25,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134526243] [2024-06-27 21:19:25,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:19:25,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:19:25,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:19:28,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:19:28,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:19:28,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134526243] [2024-06-27 21:19:28,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134526243] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:19:28,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:19:28,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:19:28,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994487436] [2024-06-27 21:19:28,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:19:28,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:19:28,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:19:28,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:19:28,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:19:28,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:19:28,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 379 transitions, 5074 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:19:28,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:19:28,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:19:28,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:19:30,616 INFO L124 PetriNetUnfolderBase]: 4048/6454 cut-off events. [2024-06-27 21:19:30,616 INFO L125 PetriNetUnfolderBase]: For 825626/825626 co-relation queries the response was YES. [2024-06-27 21:19:30,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48901 conditions, 6454 events. 4048/6454 cut-off events. For 825626/825626 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 39801 event pairs, 1140 based on Foata normal form. 1/6441 useless extension candidates. Maximal degree in co-relation 48762. Up to 4730 conditions per place. [2024-06-27 21:19:30,702 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 240 selfloop transitions, 168 changer transitions 0/413 dead transitions. [2024-06-27 21:19:30,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 413 transitions, 6609 flow [2024-06-27 21:19:30,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:19:30,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:19:30,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-27 21:19:30,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-27 21:19:30,703 INFO L175 Difference]: Start difference. First operand has 287 places, 379 transitions, 5074 flow. Second operand 8 states and 148 transitions. [2024-06-27 21:19:30,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 413 transitions, 6609 flow [2024-06-27 21:19:32,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 413 transitions, 6420 flow, removed 74 selfloop flow, removed 3 redundant places. [2024-06-27 21:19:32,141 INFO L231 Difference]: Finished difference. Result has 292 places, 382 transitions, 5315 flow [2024-06-27 21:19:32,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4915, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5315, PETRI_PLACES=292, PETRI_TRANSITIONS=382} [2024-06-27 21:19:32,142 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 248 predicate places. [2024-06-27 21:19:32,142 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 382 transitions, 5315 flow [2024-06-27 21:19:32,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:19:32,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:19:32,143 INFO 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] [2024-06-27 21:19:32,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-27 21:19:32,143 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:19:32,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:19:32,143 INFO L85 PathProgramCache]: Analyzing trace with hash -2004290785, now seen corresponding path program 7 times [2024-06-27 21:19:32,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:19:32,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444830228] [2024-06-27 21:19:32,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:19:32,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:19:32,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:19:34,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:19:34,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:19:34,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444830228] [2024-06-27 21:19:34,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444830228] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:19:34,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:19:34,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:19:34,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750298136] [2024-06-27 21:19:34,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:19:34,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:19:34,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:19:34,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:19:34,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:19:34,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:19:34,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 382 transitions, 5315 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:19:34,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:19:34,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:19:34,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:19:37,251 INFO L124 PetriNetUnfolderBase]: 4079/6507 cut-off events. [2024-06-27 21:19:37,251 INFO L125 PetriNetUnfolderBase]: For 861694/861694 co-relation queries the response was YES. [2024-06-27 21:19:37,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50214 conditions, 6507 events. 4079/6507 cut-off events. For 861694/861694 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 40213 event pairs, 1141 based on Foata normal form. 3/6496 useless extension candidates. Maximal degree in co-relation 50073. Up to 4747 conditions per place. [2024-06-27 21:19:37,333 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 240 selfloop transitions, 172 changer transitions 0/417 dead transitions. [2024-06-27 21:19:37,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 417 transitions, 6906 flow [2024-06-27 21:19:37,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:19:37,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:19:37,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-27 21:19:37,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-27 21:19:37,334 INFO L175 Difference]: Start difference. First operand has 292 places, 382 transitions, 5315 flow. Second operand 8 states and 147 transitions. [2024-06-27 21:19:37,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 417 transitions, 6906 flow [2024-06-27 21:19:38,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 417 transitions, 6543 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-27 21:19:38,571 INFO L231 Difference]: Finished difference. Result has 295 places, 389 transitions, 5453 flow [2024-06-27 21:19:38,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4962, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5453, PETRI_PLACES=295, PETRI_TRANSITIONS=389} [2024-06-27 21:19:38,572 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 251 predicate places. [2024-06-27 21:19:38,572 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 389 transitions, 5453 flow [2024-06-27 21:19:38,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:19:38,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:19:38,572 INFO 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] [2024-06-27 21:19:38,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-27 21:19:38,572 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:19:38,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:19:38,573 INFO L85 PathProgramCache]: Analyzing trace with hash -923841925, now seen corresponding path program 8 times [2024-06-27 21:19:38,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:19:38,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510893334] [2024-06-27 21:19:38,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:19:38,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:19:38,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:19:41,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:19:41,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:19:41,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510893334] [2024-06-27 21:19:41,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510893334] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:19:41,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:19:41,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:19:41,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664456041] [2024-06-27 21:19:41,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:19:41,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:19:41,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:19:41,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:19:41,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:19:41,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:19:41,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 389 transitions, 5453 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:19:41,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:19:41,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:19:41,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:19:43,421 INFO L124 PetriNetUnfolderBase]: 4150/6619 cut-off events. [2024-06-27 21:19:43,421 INFO L125 PetriNetUnfolderBase]: For 906262/906262 co-relation queries the response was YES. [2024-06-27 21:19:43,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51634 conditions, 6619 events. 4150/6619 cut-off events. For 906262/906262 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 40942 event pairs, 1035 based on Foata normal form. 3/6614 useless extension candidates. Maximal degree in co-relation 51492. Up to 5732 conditions per place. [2024-06-27 21:19:43,508 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 318 selfloop transitions, 99 changer transitions 0/422 dead transitions. [2024-06-27 21:19:43,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 422 transitions, 6833 flow [2024-06-27 21:19:43,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:19:43,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:19:43,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 171 transitions. [2024-06-27 21:19:43,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39767441860465114 [2024-06-27 21:19:43,509 INFO L175 Difference]: Start difference. First operand has 295 places, 389 transitions, 5453 flow. Second operand 10 states and 171 transitions. [2024-06-27 21:19:43,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 422 transitions, 6833 flow [2024-06-27 21:19:45,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 422 transitions, 6492 flow, removed 43 selfloop flow, removed 4 redundant places. [2024-06-27 21:19:45,120 INFO L231 Difference]: Finished difference. Result has 303 places, 396 transitions, 5525 flow [2024-06-27 21:19:45,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5124, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5525, PETRI_PLACES=303, PETRI_TRANSITIONS=396} [2024-06-27 21:19:45,121 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 259 predicate places. [2024-06-27 21:19:45,121 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 396 transitions, 5525 flow [2024-06-27 21:19:45,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:19:45,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:19:45,121 INFO 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] [2024-06-27 21:19:45,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-27 21:19:45,121 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:19:45,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:19:45,122 INFO L85 PathProgramCache]: Analyzing trace with hash -542671655, now seen corresponding path program 9 times [2024-06-27 21:19:45,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:19:45,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670486729] [2024-06-27 21:19:45,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:19:45,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:19:45,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:19:47,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:19:47,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:19:47,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670486729] [2024-06-27 21:19:47,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670486729] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:19:47,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:19:47,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:19:47,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755778945] [2024-06-27 21:19:47,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:19:47,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:19:47,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:19:47,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:19:47,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:19:47,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:19:47,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 396 transitions, 5525 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:19:47,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:19:47,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:19:47,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:19:49,906 INFO L124 PetriNetUnfolderBase]: 4141/6619 cut-off events. [2024-06-27 21:19:49,906 INFO L125 PetriNetUnfolderBase]: For 914134/914134 co-relation queries the response was YES. [2024-06-27 21:19:49,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51241 conditions, 6619 events. 4141/6619 cut-off events. For 914134/914134 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 41081 event pairs, 1051 based on Foata normal form. 3/6614 useless extension candidates. Maximal degree in co-relation 51096. Up to 5728 conditions per place. [2024-06-27 21:19:49,989 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 318 selfloop transitions, 96 changer transitions 0/419 dead transitions. [2024-06-27 21:19:49,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 419 transitions, 6781 flow [2024-06-27 21:19:49,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:19:49,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:19:49,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-27 21:19:49,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-27 21:19:49,990 INFO L175 Difference]: Start difference. First operand has 303 places, 396 transitions, 5525 flow. Second operand 9 states and 153 transitions. [2024-06-27 21:19:49,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 419 transitions, 6781 flow [2024-06-27 21:19:51,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 419 transitions, 6545 flow, removed 37 selfloop flow, removed 7 redundant places. [2024-06-27 21:19:51,852 INFO L231 Difference]: Finished difference. Result has 305 places, 396 transitions, 5488 flow [2024-06-27 21:19:51,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5289, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5488, PETRI_PLACES=305, PETRI_TRANSITIONS=396} [2024-06-27 21:19:51,853 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 261 predicate places. [2024-06-27 21:19:51,853 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 396 transitions, 5488 flow [2024-06-27 21:19:51,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:19:51,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:19:51,853 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:19:51,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-27 21:19:51,853 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:19:51,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:19:51,853 INFO L85 PathProgramCache]: Analyzing trace with hash -2137891516, now seen corresponding path program 1 times [2024-06-27 21:19:51,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:19:51,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386897641] [2024-06-27 21:19:51,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:19:51,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:19:51,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:19:54,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:19:54,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:19:54,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386897641] [2024-06-27 21:19:54,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386897641] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:19:54,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:19:54,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:19:54,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4085513] [2024-06-27 21:19:54,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:19:54,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:19:54,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:19:54,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:19:54,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:19:54,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:19:54,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 396 transitions, 5488 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) [2024-06-27 21:19:54,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:19:54,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:19:54,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:19:56,916 INFO L124 PetriNetUnfolderBase]: 4450/7127 cut-off events. [2024-06-27 21:19:56,916 INFO L125 PetriNetUnfolderBase]: For 1169607/1169615 co-relation queries the response was YES. [2024-06-27 21:19:56,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57929 conditions, 7127 events. 4450/7127 cut-off events. For 1169607/1169615 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 44958 event pairs, 1159 based on Foata normal form. 24/7147 useless extension candidates. Maximal degree in co-relation 57783. Up to 5247 conditions per place. [2024-06-27 21:19:57,006 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 329 selfloop transitions, 112 changer transitions 0/446 dead transitions. [2024-06-27 21:19:57,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 446 transitions, 7068 flow [2024-06-27 21:19:57,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:19:57,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:19:57,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-27 21:19:57,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4476744186046512 [2024-06-27 21:19:57,007 INFO L175 Difference]: Start difference. First operand has 305 places, 396 transitions, 5488 flow. Second operand 8 states and 154 transitions. [2024-06-27 21:19:57,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 446 transitions, 7068 flow [2024-06-27 21:19:59,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 446 transitions, 6849 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-27 21:19:59,112 INFO L231 Difference]: Finished difference. Result has 307 places, 402 transitions, 5675 flow [2024-06-27 21:19:59,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5269, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5675, PETRI_PLACES=307, PETRI_TRANSITIONS=402} [2024-06-27 21:19:59,113 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 263 predicate places. [2024-06-27 21:19:59,113 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 402 transitions, 5675 flow [2024-06-27 21:19:59,113 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) [2024-06-27 21:19:59,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:19:59,113 INFO 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] [2024-06-27 21:19:59,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-27 21:19:59,113 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:19:59,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:19:59,113 INFO L85 PathProgramCache]: Analyzing trace with hash 442846624, now seen corresponding path program 2 times [2024-06-27 21:19:59,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:19:59,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657351364] [2024-06-27 21:19:59,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:19:59,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:19:59,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:20:01,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:20:01,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:20:01,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657351364] [2024-06-27 21:20:01,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657351364] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:20:01,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:20:01,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:20:01,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204502533] [2024-06-27 21:20:01,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:20:01,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:20:01,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:20:01,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:20:01,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:20:01,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:20:01,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 402 transitions, 5675 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) [2024-06-27 21:20:01,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:20:01,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:20:01,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:20:04,270 INFO L124 PetriNetUnfolderBase]: 4538/7253 cut-off events. [2024-06-27 21:20:04,270 INFO L125 PetriNetUnfolderBase]: For 1239472/1239480 co-relation queries the response was YES. [2024-06-27 21:20:04,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59769 conditions, 7253 events. 4538/7253 cut-off events. For 1239472/1239480 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 45864 event pairs, 1266 based on Foata normal form. 32/7281 useless extension candidates. Maximal degree in co-relation 59620. Up to 6111 conditions per place. [2024-06-27 21:20:04,374 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 319 selfloop transitions, 111 changer transitions 0/435 dead transitions. [2024-06-27 21:20:04,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 435 transitions, 6688 flow [2024-06-27 21:20:04,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:20:04,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:20:04,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-27 21:20:04,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42441860465116277 [2024-06-27 21:20:04,376 INFO L175 Difference]: Start difference. First operand has 307 places, 402 transitions, 5675 flow. Second operand 8 states and 146 transitions. [2024-06-27 21:20:04,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 435 transitions, 6688 flow [2024-06-27 21:20:06,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 435 transitions, 6527 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-27 21:20:06,815 INFO L231 Difference]: Finished difference. Result has 312 places, 404 transitions, 5799 flow [2024-06-27 21:20:06,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5514, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5799, PETRI_PLACES=312, PETRI_TRANSITIONS=404} [2024-06-27 21:20:06,816 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 268 predicate places. [2024-06-27 21:20:06,816 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 404 transitions, 5799 flow [2024-06-27 21:20:06,816 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) [2024-06-27 21:20:06,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:20:06,816 INFO 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] [2024-06-27 21:20:06,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-27 21:20:06,816 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:20:06,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:20:06,817 INFO L85 PathProgramCache]: Analyzing trace with hash 525959794, now seen corresponding path program 3 times [2024-06-27 21:20:06,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:20:06,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521695097] [2024-06-27 21:20:06,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:20:06,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:20:06,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:20:09,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:20:09,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:20:09,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521695097] [2024-06-27 21:20:09,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521695097] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:20:09,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:20:09,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:20:09,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027265417] [2024-06-27 21:20:09,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:20:09,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:20:09,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:20:09,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:20:09,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:20:09,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:20:09,689 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 404 transitions, 5799 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) [2024-06-27 21:20:09,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:20:09,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:20:09,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:20:11,939 INFO L124 PetriNetUnfolderBase]: 4689/7488 cut-off events. [2024-06-27 21:20:11,939 INFO L125 PetriNetUnfolderBase]: For 1296402/1296410 co-relation queries the response was YES. [2024-06-27 21:20:12,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63193 conditions, 7488 events. 4689/7488 cut-off events. For 1296402/1296410 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 47573 event pairs, 1271 based on Foata normal form. 24/7508 useless extension candidates. Maximal degree in co-relation 63042. Up to 6125 conditions per place. [2024-06-27 21:20:12,043 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 327 selfloop transitions, 110 changer transitions 0/442 dead transitions. [2024-06-27 21:20:12,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 442 transitions, 7071 flow [2024-06-27 21:20:12,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:20:12,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:20:12,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-27 21:20:12,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-27 21:20:12,044 INFO L175 Difference]: Start difference. First operand has 312 places, 404 transitions, 5799 flow. Second operand 8 states and 148 transitions. [2024-06-27 21:20:12,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 442 transitions, 7071 flow [2024-06-27 21:20:14,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 442 transitions, 6811 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-27 21:20:14,538 INFO L231 Difference]: Finished difference. Result has 315 places, 408 transitions, 5879 flow [2024-06-27 21:20:14,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5539, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5879, PETRI_PLACES=315, PETRI_TRANSITIONS=408} [2024-06-27 21:20:14,538 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 271 predicate places. [2024-06-27 21:20:14,538 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 408 transitions, 5879 flow [2024-06-27 21:20:14,539 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) [2024-06-27 21:20:14,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:20:14,539 INFO 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] [2024-06-27 21:20:14,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-27 21:20:14,539 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:20:14,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:20:14,539 INFO L85 PathProgramCache]: Analyzing trace with hash -2079065692, now seen corresponding path program 4 times [2024-06-27 21:20:14,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:20:14,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528542074] [2024-06-27 21:20:14,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:20:14,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:20:14,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:20:17,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:20:17,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:20:17,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528542074] [2024-06-27 21:20:17,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528542074] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:20:17,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:20:17,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:20:17,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426961870] [2024-06-27 21:20:17,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:20:17,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:20:17,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:20:17,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:20:17,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:20:17,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:20:17,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 408 transitions, 5879 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) [2024-06-27 21:20:17,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:20:17,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:20:17,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:20:21,021 INFO L124 PetriNetUnfolderBase]: 4777/7616 cut-off events. [2024-06-27 21:20:21,021 INFO L125 PetriNetUnfolderBase]: For 1362419/1362419 co-relation queries the response was YES. [2024-06-27 21:20:21,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64281 conditions, 7616 events. 4777/7616 cut-off events. For 1362419/1362419 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 48430 event pairs, 1361 based on Foata normal form. 24/7632 useless extension candidates. Maximal degree in co-relation 64128. Up to 6480 conditions per place. [2024-06-27 21:20:21,108 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 320 selfloop transitions, 123 changer transitions 0/448 dead transitions. [2024-06-27 21:20:21,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 448 transitions, 6940 flow [2024-06-27 21:20:21,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:20:21,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:20:21,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 190 transitions. [2024-06-27 21:20:21,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40169133192389006 [2024-06-27 21:20:21,110 INFO L175 Difference]: Start difference. First operand has 315 places, 408 transitions, 5879 flow. Second operand 11 states and 190 transitions. [2024-06-27 21:20:21,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 448 transitions, 6940 flow [2024-06-27 21:20:23,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 448 transitions, 6824 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-27 21:20:23,764 INFO L231 Difference]: Finished difference. Result has 323 places, 410 transitions, 6080 flow [2024-06-27 21:20:23,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5763, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6080, PETRI_PLACES=323, PETRI_TRANSITIONS=410} [2024-06-27 21:20:23,765 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 279 predicate places. [2024-06-27 21:20:23,765 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 410 transitions, 6080 flow [2024-06-27 21:20:23,765 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) [2024-06-27 21:20:23,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:20:23,765 INFO 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] [2024-06-27 21:20:23,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-27 21:20:23,765 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:20:23,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:20:23,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1061337090, now seen corresponding path program 1 times [2024-06-27 21:20:23,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:20:23,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966637852] [2024-06-27 21:20:23,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:20:23,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:20:23,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:20:27,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:20:27,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:20:27,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966637852] [2024-06-27 21:20:27,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966637852] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:20:27,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:20:27,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:20:27,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777065634] [2024-06-27 21:20:27,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:20:27,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:20:27,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:20:27,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:20:27,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:20:27,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:20:27,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 410 transitions, 6080 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) [2024-06-27 21:20:27,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:20:27,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:20:27,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:20:30,078 INFO L124 PetriNetUnfolderBase]: 4905/7816 cut-off events. [2024-06-27 21:20:30,078 INFO L125 PetriNetUnfolderBase]: For 1410939/1410939 co-relation queries the response was YES. [2024-06-27 21:20:30,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67375 conditions, 7816 events. 4905/7816 cut-off events. For 1410939/1410939 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 49842 event pairs, 1381 based on Foata normal form. 16/7824 useless extension candidates. Maximal degree in co-relation 67220. Up to 6440 conditions per place. [2024-06-27 21:20:30,185 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 320 selfloop transitions, 130 changer transitions 0/455 dead transitions. [2024-06-27 21:20:30,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 455 transitions, 7419 flow [2024-06-27 21:20:30,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:20:30,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:20:30,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 192 transitions. [2024-06-27 21:20:30,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4059196617336152 [2024-06-27 21:20:30,186 INFO L175 Difference]: Start difference. First operand has 323 places, 410 transitions, 6080 flow. Second operand 11 states and 192 transitions. [2024-06-27 21:20:30,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 455 transitions, 7419 flow [2024-06-27 21:20:33,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 455 transitions, 7224 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-27 21:20:33,281 INFO L231 Difference]: Finished difference. Result has 328 places, 414 transitions, 6291 flow [2024-06-27 21:20:33,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5885, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6291, PETRI_PLACES=328, PETRI_TRANSITIONS=414} [2024-06-27 21:20:33,282 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 284 predicate places. [2024-06-27 21:20:33,282 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 414 transitions, 6291 flow [2024-06-27 21:20:33,282 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) [2024-06-27 21:20:33,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:20:33,282 INFO 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] [2024-06-27 21:20:33,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-27 21:20:33,282 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:20:33,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:20:33,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1055615358, now seen corresponding path program 5 times [2024-06-27 21:20:33,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:20:33,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392780409] [2024-06-27 21:20:33,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:20:33,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:20:33,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:20:36,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:20:36,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:20:36,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392780409] [2024-06-27 21:20:36,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392780409] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:20:36,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:20:36,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:20:36,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681930169] [2024-06-27 21:20:36,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:20:36,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:20:36,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:20:36,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:20:36,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:20:36,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:20:36,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 414 transitions, 6291 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) [2024-06-27 21:20:36,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:20:36,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:20:36,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:20:39,454 INFO L124 PetriNetUnfolderBase]: 4849/7740 cut-off events. [2024-06-27 21:20:39,454 INFO L125 PetriNetUnfolderBase]: For 1361794/1361794 co-relation queries the response was YES. [2024-06-27 21:20:39,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64628 conditions, 7740 events. 4849/7740 cut-off events. For 1361794/1361794 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 49396 event pairs, 1389 based on Foata normal form. 24/7756 useless extension candidates. Maximal degree in co-relation 64470. Up to 6596 conditions per place. [2024-06-27 21:20:39,563 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 325 selfloop transitions, 117 changer transitions 0/447 dead transitions. [2024-06-27 21:20:39,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 447 transitions, 7279 flow [2024-06-27 21:20:39,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:20:39,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:20:39,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-27 21:20:39,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4160206718346253 [2024-06-27 21:20:39,567 INFO L175 Difference]: Start difference. First operand has 328 places, 414 transitions, 6291 flow. Second operand 9 states and 161 transitions. [2024-06-27 21:20:39,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 447 transitions, 7279 flow [2024-06-27 21:20:42,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 447 transitions, 6954 flow, removed 50 selfloop flow, removed 8 redundant places. [2024-06-27 21:20:42,605 INFO L231 Difference]: Finished difference. Result has 329 places, 414 transitions, 6206 flow [2024-06-27 21:20:42,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5966, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6206, PETRI_PLACES=329, PETRI_TRANSITIONS=414} [2024-06-27 21:20:42,605 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 285 predicate places. [2024-06-27 21:20:42,605 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 414 transitions, 6206 flow [2024-06-27 21:20:42,606 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) [2024-06-27 21:20:42,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:20:42,606 INFO 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] [2024-06-27 21:20:42,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-27 21:20:42,606 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:20:42,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:20:42,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1055611638, now seen corresponding path program 6 times [2024-06-27 21:20:42,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:20:42,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440829201] [2024-06-27 21:20:42,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:20:42,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:20:42,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:20:45,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:20:45,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:20:45,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440829201] [2024-06-27 21:20:45,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440829201] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:20:45,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:20:45,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:20:45,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850054237] [2024-06-27 21:20:45,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:20:45,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:20:45,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:20:45,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:20:45,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:20:45,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:20:45,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 414 transitions, 6206 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) [2024-06-27 21:20:45,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:20:45,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:20:45,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:20:48,683 INFO L124 PetriNetUnfolderBase]: 5000/7963 cut-off events. [2024-06-27 21:20:48,683 INFO L125 PetriNetUnfolderBase]: For 1414946/1414946 co-relation queries the response was YES. [2024-06-27 21:20:48,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67323 conditions, 7963 events. 5000/7963 cut-off events. For 1414946/1414946 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 50915 event pairs, 1404 based on Foata normal form. 16/7971 useless extension candidates. Maximal degree in co-relation 67164. Up to 6472 conditions per place. [2024-06-27 21:20:48,785 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 333 selfloop transitions, 116 changer transitions 0/454 dead transitions. [2024-06-27 21:20:48,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 454 transitions, 7532 flow [2024-06-27 21:20:48,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:20:48,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:20:48,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-27 21:20:48,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42118863049095606 [2024-06-27 21:20:48,786 INFO L175 Difference]: Start difference. First operand has 329 places, 414 transitions, 6206 flow. Second operand 9 states and 163 transitions. [2024-06-27 21:20:48,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 454 transitions, 7532 flow [2024-06-27 21:20:52,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 454 transitions, 7282 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-27 21:20:52,094 INFO L231 Difference]: Finished difference. Result has 331 places, 418 transitions, 6331 flow [2024-06-27 21:20:52,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5956, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6331, PETRI_PLACES=331, PETRI_TRANSITIONS=418} [2024-06-27 21:20:52,095 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 287 predicate places. [2024-06-27 21:20:52,095 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 418 transitions, 6331 flow [2024-06-27 21:20:52,095 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) [2024-06-27 21:20:52,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:20:52,095 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] [2024-06-27 21:20:52,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-27 21:20:52,096 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:20:52,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:20:52,096 INFO L85 PathProgramCache]: Analyzing trace with hash -323452444, now seen corresponding path program 7 times [2024-06-27 21:20:52,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:20:52,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968540754] [2024-06-27 21:20:52,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:20:52,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:20:52,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:20:55,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:20:55,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:20:55,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968540754] [2024-06-27 21:20:55,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968540754] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:20:55,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:20:55,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:20:55,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776615082] [2024-06-27 21:20:55,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:20:55,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:20:55,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:20:55,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:20:55,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:20:55,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:20:55,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 418 transitions, 6331 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) [2024-06-27 21:20:55,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:20:55,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:20:55,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:20:58,165 INFO L124 PetriNetUnfolderBase]: 5228/8296 cut-off events. [2024-06-27 21:20:58,166 INFO L125 PetriNetUnfolderBase]: For 1705211/1705211 co-relation queries the response was YES. [2024-06-27 21:20:58,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69322 conditions, 8296 events. 5228/8296 cut-off events. For 1705211/1705211 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 53146 event pairs, 1364 based on Foata normal form. 68/8356 useless extension candidates. Maximal degree in co-relation 69161. Up to 7249 conditions per place. [2024-06-27 21:20:58,276 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 345 selfloop transitions, 95 changer transitions 7/452 dead transitions. [2024-06-27 21:20:58,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 452 transitions, 7376 flow [2024-06-27 21:20:58,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:20:58,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:20:58,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-27 21:20:58,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-06-27 21:20:58,277 INFO L175 Difference]: Start difference. First operand has 331 places, 418 transitions, 6331 flow. Second operand 10 states and 175 transitions. [2024-06-27 21:20:58,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 452 transitions, 7376 flow [2024-06-27 21:21:00,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 452 transitions, 7171 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-27 21:21:00,698 INFO L231 Difference]: Finished difference. Result has 336 places, 415 transitions, 6296 flow [2024-06-27 21:21:00,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6126, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6296, PETRI_PLACES=336, PETRI_TRANSITIONS=415} [2024-06-27 21:21:00,699 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 292 predicate places. [2024-06-27 21:21:00,699 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 415 transitions, 6296 flow [2024-06-27 21:21:00,699 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) [2024-06-27 21:21:00,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:21:00,699 INFO 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] [2024-06-27 21:21:00,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-27 21:21:00,699 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:21:00,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:21:00,699 INFO L85 PathProgramCache]: Analyzing trace with hash -1796855806, now seen corresponding path program 2 times [2024-06-27 21:21:00,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:21:00,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438471375] [2024-06-27 21:21:00,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:21:00,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:21:00,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:21:03,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:21:03,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:21:03,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438471375] [2024-06-27 21:21:03,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438471375] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:21:03,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:21:03,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:21:03,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60985437] [2024-06-27 21:21:03,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:21:03,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:21:03,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:21:03,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:21:03,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:21:03,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:21:03,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 415 transitions, 6296 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) [2024-06-27 21:21:03,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:21:03,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:21:03,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:21:06,597 INFO L124 PetriNetUnfolderBase]: 5148/8193 cut-off events. [2024-06-27 21:21:06,598 INFO L125 PetriNetUnfolderBase]: For 1588518/1588518 co-relation queries the response was YES. [2024-06-27 21:21:06,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67177 conditions, 8193 events. 5148/8193 cut-off events. For 1588518/1588518 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 52483 event pairs, 1217 based on Foata normal form. 56/8241 useless extension candidates. Maximal degree in co-relation 67014. Up to 6283 conditions per place. [2024-06-27 21:21:06,708 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 338 selfloop transitions, 96 changer transitions 17/456 dead transitions. [2024-06-27 21:21:06,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 456 transitions, 7586 flow [2024-06-27 21:21:06,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:21:06,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:21:06,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-27 21:21:06,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42093023255813955 [2024-06-27 21:21:06,709 INFO L175 Difference]: Start difference. First operand has 336 places, 415 transitions, 6296 flow. Second operand 10 states and 181 transitions. [2024-06-27 21:21:06,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 456 transitions, 7586 flow [2024-06-27 21:21:09,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 456 transitions, 7370 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-27 21:21:09,277 INFO L231 Difference]: Finished difference. Result has 338 places, 404 transitions, 6127 flow [2024-06-27 21:21:09,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6080, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6127, PETRI_PLACES=338, PETRI_TRANSITIONS=404} [2024-06-27 21:21:09,278 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 294 predicate places. [2024-06-27 21:21:09,278 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 404 transitions, 6127 flow [2024-06-27 21:21:09,278 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) [2024-06-27 21:21:09,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:21:09,279 INFO 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] [2024-06-27 21:21:09,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-27 21:21:09,279 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:21:09,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:21:09,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1895461216, now seen corresponding path program 8 times [2024-06-27 21:21:09,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:21:09,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449858687] [2024-06-27 21:21:09,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:21:09,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:21:09,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:21:12,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:21:12,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:21:12,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449858687] [2024-06-27 21:21:12,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449858687] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:21:12,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:21:12,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:21:12,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954335302] [2024-06-27 21:21:12,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:21:12,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:21:12,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:21:12,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:21:12,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:21:12,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:21:12,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 404 transitions, 6127 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) [2024-06-27 21:21:12,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:21:12,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:21:12,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:21:15,019 INFO L124 PetriNetUnfolderBase]: 4696/7492 cut-off events. [2024-06-27 21:21:15,019 INFO L125 PetriNetUnfolderBase]: For 1329761/1329761 co-relation queries the response was YES. [2024-06-27 21:21:15,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57617 conditions, 7492 events. 4696/7492 cut-off events. For 1329761/1329761 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 47744 event pairs, 1144 based on Foata normal form. 68/7552 useless extension candidates. Maximal degree in co-relation 57453. Up to 6495 conditions per place. [2024-06-27 21:21:15,114 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 348 selfloop transitions, 73 changer transitions 7/433 dead transitions. [2024-06-27 21:21:15,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 433 transitions, 7081 flow [2024-06-27 21:21:15,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:21:15,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:21:15,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-27 21:21:15,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4082687338501292 [2024-06-27 21:21:15,116 INFO L175 Difference]: Start difference. First operand has 338 places, 404 transitions, 6127 flow. Second operand 9 states and 158 transitions. [2024-06-27 21:21:15,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 433 transitions, 7081 flow [2024-06-27 21:21:17,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 433 transitions, 6662 flow, removed 41 selfloop flow, removed 12 redundant places. [2024-06-27 21:21:17,016 INFO L231 Difference]: Finished difference. Result has 335 places, 399 transitions, 5778 flow [2024-06-27 21:21:17,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5708, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5778, PETRI_PLACES=335, PETRI_TRANSITIONS=399} [2024-06-27 21:21:17,016 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 291 predicate places. [2024-06-27 21:21:17,016 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 399 transitions, 5778 flow [2024-06-27 21:21:17,016 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) [2024-06-27 21:21:17,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:21:17,016 INFO 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] [2024-06-27 21:21:17,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-27 21:21:17,017 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:21:17,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:21:17,017 INFO L85 PathProgramCache]: Analyzing trace with hash -534082826, now seen corresponding path program 9 times [2024-06-27 21:21:17,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:21:17,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068406395] [2024-06-27 21:21:17,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:21:17,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:21:17,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:21:19,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:21:19,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:21:19,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068406395] [2024-06-27 21:21:19,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068406395] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:21:19,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:21:19,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:21:19,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817800585] [2024-06-27 21:21:19,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:21:19,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:21:19,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:21:19,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:21:19,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:21:20,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:21:20,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 399 transitions, 5778 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) [2024-06-27 21:21:20,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:21:20,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:21:20,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:21:22,608 INFO L124 PetriNetUnfolderBase]: 5005/8015 cut-off events. [2024-06-27 21:21:22,608 INFO L125 PetriNetUnfolderBase]: For 1529757/1529757 co-relation queries the response was YES. [2024-06-27 21:21:22,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63450 conditions, 8015 events. 5005/8015 cut-off events. For 1529757/1529757 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 51346 event pairs, 1195 based on Foata normal form. 56/8063 useless extension candidates. Maximal degree in co-relation 63287. Up to 6148 conditions per place. [2024-06-27 21:21:22,707 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 359 selfloop transitions, 73 changer transitions 0/437 dead transitions. [2024-06-27 21:21:22,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 437 transitions, 7031 flow [2024-06-27 21:21:22,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:21:22,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:21:22,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-27 21:21:22,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42118863049095606 [2024-06-27 21:21:22,708 INFO L175 Difference]: Start difference. First operand has 335 places, 399 transitions, 5778 flow. Second operand 9 states and 163 transitions. [2024-06-27 21:21:22,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 437 transitions, 7031 flow [2024-06-27 21:21:25,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 437 transitions, 6603 flow, removed 8 selfloop flow, removed 12 redundant places. [2024-06-27 21:21:25,444 INFO L231 Difference]: Finished difference. Result has 333 places, 401 transitions, 5576 flow [2024-06-27 21:21:25,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5350, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5576, PETRI_PLACES=333, PETRI_TRANSITIONS=401} [2024-06-27 21:21:25,445 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 289 predicate places. [2024-06-27 21:21:25,445 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 401 transitions, 5576 flow [2024-06-27 21:21:25,445 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) [2024-06-27 21:21:25,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:21:25,445 INFO 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] [2024-06-27 21:21:25,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-27 21:21:25,446 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:21:25,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:21:25,446 INFO L85 PathProgramCache]: Analyzing trace with hash 901444931, now seen corresponding path program 1 times [2024-06-27 21:21:25,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:21:25,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123170921] [2024-06-27 21:21:25,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:21:25,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:21:25,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:21:28,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:21:28,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:21:28,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123170921] [2024-06-27 21:21:28,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123170921] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:21:28,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:21:28,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:21:28,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892053244] [2024-06-27 21:21:28,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:21:28,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:21:28,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:21:28,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:21:28,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:21:28,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:21:28,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 401 transitions, 5576 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:21:28,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:21:28,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:21:28,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:21:31,014 INFO L124 PetriNetUnfolderBase]: 4987/8001 cut-off events. [2024-06-27 21:21:31,014 INFO L125 PetriNetUnfolderBase]: For 1253959/1253959 co-relation queries the response was YES. [2024-06-27 21:21:31,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62553 conditions, 8001 events. 4987/8001 cut-off events. For 1253959/1253959 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 51144 event pairs, 1272 based on Foata normal form. 8/8001 useless extension candidates. Maximal degree in co-relation 62389. Up to 7284 conditions per place. [2024-06-27 21:21:31,113 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 390 selfloop transitions, 36 changer transitions 0/431 dead transitions. [2024-06-27 21:21:31,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 431 transitions, 6766 flow [2024-06-27 21:21:31,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:21:31,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:21:31,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-27 21:21:31,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-27 21:21:31,114 INFO L175 Difference]: Start difference. First operand has 333 places, 401 transitions, 5576 flow. Second operand 7 states and 126 transitions. [2024-06-27 21:21:31,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 431 transitions, 6766 flow [2024-06-27 21:21:34,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 431 transitions, 6337 flow, removed 38 selfloop flow, removed 9 redundant places. [2024-06-27 21:21:34,143 INFO L231 Difference]: Finished difference. Result has 331 places, 401 transitions, 5223 flow [2024-06-27 21:21:34,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5147, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5223, PETRI_PLACES=331, PETRI_TRANSITIONS=401} [2024-06-27 21:21:34,144 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 287 predicate places. [2024-06-27 21:21:34,144 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 401 transitions, 5223 flow [2024-06-27 21:21:34,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:21:34,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:21:34,144 INFO 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] [2024-06-27 21:21:34,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-27 21:21:34,144 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:21:34,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:21:34,144 INFO L85 PathProgramCache]: Analyzing trace with hash -939069749, now seen corresponding path program 2 times [2024-06-27 21:21:34,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:21:34,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655913023] [2024-06-27 21:21:34,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:21:34,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:21:34,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:21:37,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:21:37,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:21:37,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655913023] [2024-06-27 21:21:37,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655913023] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:21:37,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:21:37,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:21:37,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525543421] [2024-06-27 21:21:37,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:21:37,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:21:37,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:21:37,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:21:37,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:21:37,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:21:37,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 401 transitions, 5223 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:21:37,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:21:37,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:21:37,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:21:39,381 INFO L124 PetriNetUnfolderBase]: 4969/7967 cut-off events. [2024-06-27 21:21:39,381 INFO L125 PetriNetUnfolderBase]: For 1225112/1225112 co-relation queries the response was YES. [2024-06-27 21:21:39,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59247 conditions, 7967 events. 4969/7967 cut-off events. For 1225112/1225112 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 50957 event pairs, 1381 based on Foata normal form. 8/7967 useless extension candidates. Maximal degree in co-relation 59085. Up to 7388 conditions per place. [2024-06-27 21:21:39,491 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 383 selfloop transitions, 37 changer transitions 0/425 dead transitions. [2024-06-27 21:21:39,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 425 transitions, 6175 flow [2024-06-27 21:21:39,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:21:39,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:21:39,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-27 21:21:39,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4053156146179402 [2024-06-27 21:21:39,492 INFO L175 Difference]: Start difference. First operand has 331 places, 401 transitions, 5223 flow. Second operand 7 states and 122 transitions. [2024-06-27 21:21:39,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 425 transitions, 6175 flow [2024-06-27 21:21:42,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 425 transitions, 6061 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-27 21:21:42,395 INFO L231 Difference]: Finished difference. Result has 332 places, 401 transitions, 5189 flow [2024-06-27 21:21:42,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5109, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5189, PETRI_PLACES=332, PETRI_TRANSITIONS=401} [2024-06-27 21:21:42,395 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 288 predicate places. [2024-06-27 21:21:42,395 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 401 transitions, 5189 flow [2024-06-27 21:21:42,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:21:42,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:21:42,396 INFO 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] [2024-06-27 21:21:42,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-27 21:21:42,396 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:21:42,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:21:42,397 INFO L85 PathProgramCache]: Analyzing trace with hash 989982791, now seen corresponding path program 1 times [2024-06-27 21:21:42,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:21:42,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001834470] [2024-06-27 21:21:42,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:21:42,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:21:42,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:21:45,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:21:45,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:21:45,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001834470] [2024-06-27 21:21:45,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001834470] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:21:45,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:21:45,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:21:45,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079586556] [2024-06-27 21:21:45,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:21:45,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:21:45,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:21:45,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:21:45,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:21:45,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:21:45,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 401 transitions, 5189 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:21:45,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:21:45,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:21:45,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:21:47,644 INFO L124 PetriNetUnfolderBase]: 4979/8009 cut-off events. [2024-06-27 21:21:47,644 INFO L125 PetriNetUnfolderBase]: For 1215180/1215180 co-relation queries the response was YES. [2024-06-27 21:21:47,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59211 conditions, 8009 events. 4979/8009 cut-off events. For 1215180/1215180 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 51753 event pairs, 1470 based on Foata normal form. 2/8010 useless extension candidates. Maximal degree in co-relation 59049. Up to 7464 conditions per place. [2024-06-27 21:21:47,754 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 387 selfloop transitions, 58 changer transitions 0/450 dead transitions. [2024-06-27 21:21:47,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 450 transitions, 6479 flow [2024-06-27 21:21:47,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:21:47,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:21:47,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-27 21:21:47,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470284237726098 [2024-06-27 21:21:47,756 INFO L175 Difference]: Start difference. First operand has 332 places, 401 transitions, 5189 flow. Second operand 9 states and 173 transitions. [2024-06-27 21:21:47,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 450 transitions, 6479 flow [2024-06-27 21:21:50,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 450 transitions, 6387 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 21:21:50,175 INFO L231 Difference]: Finished difference. Result has 335 places, 404 transitions, 5261 flow [2024-06-27 21:21:50,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5097, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5261, PETRI_PLACES=335, PETRI_TRANSITIONS=404} [2024-06-27 21:21:50,176 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 291 predicate places. [2024-06-27 21:21:50,176 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 404 transitions, 5261 flow [2024-06-27 21:21:50,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:21:50,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:21:50,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:21:50,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-27 21:21:50,177 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:21:50,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:21:50,177 INFO L85 PathProgramCache]: Analyzing trace with hash 579368621, now seen corresponding path program 2 times [2024-06-27 21:21:50,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:21:50,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134404251] [2024-06-27 21:21:50,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:21:50,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:21:50,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:21:53,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:21:53,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:21:53,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134404251] [2024-06-27 21:21:53,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134404251] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:21:53,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:21:53,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:21:53,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219464570] [2024-06-27 21:21:53,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:21:53,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:21:53,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:21:53,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:21:53,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:21:53,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:21:53,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 404 transitions, 5261 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:21:53,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:21:53,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:21:53,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:21:56,095 INFO L124 PetriNetUnfolderBase]: 4973/8001 cut-off events. [2024-06-27 21:21:56,095 INFO L125 PetriNetUnfolderBase]: For 1225908/1225908 co-relation queries the response was YES. [2024-06-27 21:21:56,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59166 conditions, 8001 events. 4973/8001 cut-off events. For 1225908/1225908 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 51646 event pairs, 1439 based on Foata normal form. 2/8002 useless extension candidates. Maximal degree in co-relation 59003. Up to 7459 conditions per place. [2024-06-27 21:21:56,194 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 387 selfloop transitions, 58 changer transitions 0/450 dead transitions. [2024-06-27 21:21:56,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 450 transitions, 6300 flow [2024-06-27 21:21:56,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:21:56,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:21:56,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 183 transitions. [2024-06-27 21:21:56,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255813953488372 [2024-06-27 21:21:56,195 INFO L175 Difference]: Start difference. First operand has 335 places, 404 transitions, 5261 flow. Second operand 10 states and 183 transitions. [2024-06-27 21:21:56,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 450 transitions, 6300 flow [2024-06-27 21:21:58,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 450 transitions, 6166 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-27 21:21:58,903 INFO L231 Difference]: Finished difference. Result has 338 places, 404 transitions, 5249 flow [2024-06-27 21:21:58,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5127, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5249, PETRI_PLACES=338, PETRI_TRANSITIONS=404} [2024-06-27 21:21:58,904 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 294 predicate places. [2024-06-27 21:21:58,904 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 404 transitions, 5249 flow [2024-06-27 21:21:58,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:21:58,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:21:58,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:21:58,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-27 21:21:58,904 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:21:58,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:21:58,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1593669433, now seen corresponding path program 1 times [2024-06-27 21:21:58,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:21:58,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261205970] [2024-06-27 21:21:58,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:21:58,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:21:58,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:22:01,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:22:01,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:22:01,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261205970] [2024-06-27 21:22:01,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261205970] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:22:01,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:22:01,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:22:01,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451118257] [2024-06-27 21:22:01,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:22:01,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:22:01,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:22:01,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:22:01,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:22:01,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:22:01,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 404 transitions, 5249 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:22:01,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:22:01,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:22:01,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:22:04,025 INFO L124 PetriNetUnfolderBase]: 5015/8033 cut-off events. [2024-06-27 21:22:04,026 INFO L125 PetriNetUnfolderBase]: For 1270269/1270269 co-relation queries the response was YES. [2024-06-27 21:22:04,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60135 conditions, 8033 events. 5015/8033 cut-off events. For 1270269/1270269 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 51441 event pairs, 1130 based on Foata normal form. 2/8027 useless extension candidates. Maximal degree in co-relation 59971. Up to 6792 conditions per place. [2024-06-27 21:22:04,140 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 284 selfloop transitions, 152 changer transitions 0/441 dead transitions. [2024-06-27 21:22:04,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 441 transitions, 6547 flow [2024-06-27 21:22:04,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:22:04,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:22:04,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-27 21:22:04,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-27 21:22:04,141 INFO L175 Difference]: Start difference. First operand has 338 places, 404 transitions, 5249 flow. Second operand 8 states and 152 transitions. [2024-06-27 21:22:04,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 441 transitions, 6547 flow [2024-06-27 21:22:07,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 441 transitions, 6440 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-27 21:22:07,271 INFO L231 Difference]: Finished difference. Result has 340 places, 410 transitions, 5672 flow [2024-06-27 21:22:07,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5142, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5672, PETRI_PLACES=340, PETRI_TRANSITIONS=410} [2024-06-27 21:22:07,271 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 296 predicate places. [2024-06-27 21:22:07,271 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 410 transitions, 5672 flow [2024-06-27 21:22:07,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:22:07,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:22:07,272 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:22:07,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-27 21:22:07,272 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:22:07,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:22:07,273 INFO L85 PathProgramCache]: Analyzing trace with hash 1138865987, now seen corresponding path program 3 times [2024-06-27 21:22:07,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:22:07,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248407730] [2024-06-27 21:22:07,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:22:07,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:22:07,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:22:09,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:22:09,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:22:09,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248407730] [2024-06-27 21:22:09,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248407730] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:22:09,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:22:09,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:22:09,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379815540] [2024-06-27 21:22:09,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:22:09,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:22:09,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:22:09,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:22:09,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:22:09,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:22:09,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 410 transitions, 5672 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:22:09,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:22:09,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:22:09,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:22:12,732 INFO L124 PetriNetUnfolderBase]: 5233/8381 cut-off events. [2024-06-27 21:22:12,733 INFO L125 PetriNetUnfolderBase]: For 1454227/1454231 co-relation queries the response was YES. [2024-06-27 21:22:12,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66187 conditions, 8381 events. 5233/8381 cut-off events. For 1454227/1454231 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 54052 event pairs, 1163 based on Foata normal form. 6/8385 useless extension candidates. Maximal degree in co-relation 66021. Up to 6394 conditions per place. [2024-06-27 21:22:12,851 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 251 selfloop transitions, 219 changer transitions 0/475 dead transitions. [2024-06-27 21:22:12,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 475 transitions, 7993 flow [2024-06-27 21:22:12,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:22:12,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:22:12,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-06-27 21:22:12,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4796511627906977 [2024-06-27 21:22:12,852 INFO L175 Difference]: Start difference. First operand has 340 places, 410 transitions, 5672 flow. Second operand 8 states and 165 transitions. [2024-06-27 21:22:12,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 475 transitions, 7993 flow [2024-06-27 21:22:16,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 475 transitions, 7728 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-27 21:22:16,525 INFO L231 Difference]: Finished difference. Result has 342 places, 432 transitions, 6243 flow [2024-06-27 21:22:16,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5415, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6243, PETRI_PLACES=342, PETRI_TRANSITIONS=432} [2024-06-27 21:22:16,526 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 298 predicate places. [2024-06-27 21:22:16,526 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 432 transitions, 6243 flow [2024-06-27 21:22:16,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:22:16,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:22:16,526 INFO 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] [2024-06-27 21:22:16,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-27 21:22:16,527 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:22:16,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:22:16,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1712454109, now seen corresponding path program 4 times [2024-06-27 21:22:16,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:22:16,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466225801] [2024-06-27 21:22:16,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:22:16,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:22:16,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:22:19,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:22:19,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:22:19,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466225801] [2024-06-27 21:22:19,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466225801] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:22:19,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:22:19,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:22:19,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55848257] [2024-06-27 21:22:19,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:22:19,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:22:19,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:22:19,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:22:19,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:22:19,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:22:19,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 432 transitions, 6243 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:22:19,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:22:19,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:22:19,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:22:22,423 INFO L124 PetriNetUnfolderBase]: 5307/8483 cut-off events. [2024-06-27 21:22:22,423 INFO L125 PetriNetUnfolderBase]: For 1507191/1507191 co-relation queries the response was YES. [2024-06-27 21:22:22,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68203 conditions, 8483 events. 5307/8483 cut-off events. For 1507191/1507191 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 54576 event pairs, 1206 based on Foata normal form. 2/8483 useless extension candidates. Maximal degree in co-relation 68037. Up to 6442 conditions per place. [2024-06-27 21:22:22,530 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 261 selfloop transitions, 223 changer transitions 0/489 dead transitions. [2024-06-27 21:22:22,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 489 transitions, 8211 flow [2024-06-27 21:22:22,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:22:22,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:22:22,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-27 21:22:22,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4702842377260982 [2024-06-27 21:22:22,531 INFO L175 Difference]: Start difference. First operand has 342 places, 432 transitions, 6243 flow. Second operand 9 states and 182 transitions. [2024-06-27 21:22:22,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 489 transitions, 8211 flow [2024-06-27 21:22:26,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 489 transitions, 7837 flow, removed 72 selfloop flow, removed 3 redundant places. [2024-06-27 21:22:26,171 INFO L231 Difference]: Finished difference. Result has 348 places, 442 transitions, 6524 flow [2024-06-27 21:22:26,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5893, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=213, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6524, PETRI_PLACES=348, PETRI_TRANSITIONS=442} [2024-06-27 21:22:26,171 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 304 predicate places. [2024-06-27 21:22:26,171 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 442 transitions, 6524 flow [2024-06-27 21:22:26,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:22:26,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:22:26,171 INFO 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] [2024-06-27 21:22:26,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-27 21:22:26,171 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:22:26,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:22:26,172 INFO L85 PathProgramCache]: Analyzing trace with hash 907930793, now seen corresponding path program 5 times [2024-06-27 21:22:26,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:22:26,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962035041] [2024-06-27 21:22:26,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:22:26,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:22:26,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:22:28,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:22:28,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:22:28,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962035041] [2024-06-27 21:22:28,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962035041] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:22:28,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:22:28,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:22:28,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751877973] [2024-06-27 21:22:28,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:22:28,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:22:28,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:22:28,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:22:28,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:22:28,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:22:28,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 442 transitions, 6524 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:22:28,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:22:28,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:22:28,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:22:31,831 INFO L124 PetriNetUnfolderBase]: 5333/8523 cut-off events. [2024-06-27 21:22:31,831 INFO L125 PetriNetUnfolderBase]: For 1548691/1548695 co-relation queries the response was YES. [2024-06-27 21:22:31,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68713 conditions, 8523 events. 5333/8523 cut-off events. For 1548691/1548695 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 54928 event pairs, 1191 based on Foata normal form. 6/8527 useless extension candidates. Maximal degree in co-relation 68546. Up to 6457 conditions per place. [2024-06-27 21:22:31,934 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 247 selfloop transitions, 234 changer transitions 0/486 dead transitions. [2024-06-27 21:22:31,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 486 transitions, 8583 flow [2024-06-27 21:22:31,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:22:31,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:22:31,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-27 21:22:31,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4622093023255814 [2024-06-27 21:22:31,936 INFO L175 Difference]: Start difference. First operand has 348 places, 442 transitions, 6524 flow. Second operand 8 states and 159 transitions. [2024-06-27 21:22:31,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 486 transitions, 8583 flow [2024-06-27 21:22:35,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 486 transitions, 8037 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-06-27 21:22:35,876 INFO L231 Difference]: Finished difference. Result has 350 places, 448 transitions, 6562 flow [2024-06-27 21:22:35,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5990, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=228, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6562, PETRI_PLACES=350, PETRI_TRANSITIONS=448} [2024-06-27 21:22:35,877 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 306 predicate places. [2024-06-27 21:22:35,877 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 448 transitions, 6562 flow [2024-06-27 21:22:35,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:22:35,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:22:35,877 INFO 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] [2024-06-27 21:22:35,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-27 21:22:35,878 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:22:35,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:22:35,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1375888607, now seen corresponding path program 6 times [2024-06-27 21:22:35,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:22:35,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375155235] [2024-06-27 21:22:35,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:22:35,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:22:35,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:22:38,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:22:38,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:22:38,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375155235] [2024-06-27 21:22:38,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375155235] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:22:38,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:22:38,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:22:38,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591049676] [2024-06-27 21:22:38,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:22:38,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:22:38,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:22:38,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:22:38,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:22:38,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:22:38,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 448 transitions, 6562 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:22:38,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:22:38,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:22:38,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:22:41,828 INFO L124 PetriNetUnfolderBase]: 5343/8537 cut-off events. [2024-06-27 21:22:41,828 INFO L125 PetriNetUnfolderBase]: For 1574711/1574711 co-relation queries the response was YES. [2024-06-27 21:22:41,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68847 conditions, 8537 events. 5343/8537 cut-off events. For 1574711/1574711 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 54965 event pairs, 1211 based on Foata normal form. 2/8537 useless extension candidates. Maximal degree in co-relation 68679. Up to 6463 conditions per place. [2024-06-27 21:22:41,956 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 254 selfloop transitions, 232 changer transitions 0/491 dead transitions. [2024-06-27 21:22:41,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 491 transitions, 8148 flow [2024-06-27 21:22:41,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:22:41,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:22:41,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-27 21:22:41,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470284237726098 [2024-06-27 21:22:41,958 INFO L175 Difference]: Start difference. First operand has 350 places, 448 transitions, 6562 flow. Second operand 9 states and 173 transitions. [2024-06-27 21:22:41,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 491 transitions, 8148 flow [2024-06-27 21:22:46,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 491 transitions, 7754 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-27 21:22:46,224 INFO L231 Difference]: Finished difference. Result has 355 places, 451 transitions, 6685 flow [2024-06-27 21:22:46,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6171, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=229, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6685, PETRI_PLACES=355, PETRI_TRANSITIONS=451} [2024-06-27 21:22:46,225 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 311 predicate places. [2024-06-27 21:22:46,225 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 451 transitions, 6685 flow [2024-06-27 21:22:46,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:22:46,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:22:46,225 INFO 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] [2024-06-27 21:22:46,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-27 21:22:46,225 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:22:46,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:22:46,225 INFO L85 PathProgramCache]: Analyzing trace with hash -61084047, now seen corresponding path program 2 times [2024-06-27 21:22:46,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:22:46,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159680848] [2024-06-27 21:22:46,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:22:46,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:22:46,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:22:48,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:22:48,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:22:48,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159680848] [2024-06-27 21:22:48,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159680848] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:22:48,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:22:48,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:22:48,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252078592] [2024-06-27 21:22:48,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:22:48,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:22:48,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:22:48,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:22:48,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:22:48,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:22:48,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 451 transitions, 6685 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:22:48,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:22:48,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:22:48,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:22:51,649 INFO L124 PetriNetUnfolderBase]: 5353/8531 cut-off events. [2024-06-27 21:22:51,649 INFO L125 PetriNetUnfolderBase]: For 1606954/1606954 co-relation queries the response was YES. [2024-06-27 21:22:51,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69272 conditions, 8531 events. 5353/8531 cut-off events. For 1606954/1606954 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 54884 event pairs, 1507 based on Foata normal form. 2/8519 useless extension candidates. Maximal degree in co-relation 69103. Up to 6469 conditions per place. [2024-06-27 21:22:51,775 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 273 selfloop transitions, 206 changer transitions 0/484 dead transitions. [2024-06-27 21:22:51,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 484 transitions, 8259 flow [2024-06-27 21:22:51,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:22:51,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:22:51,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-27 21:22:51,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42441860465116277 [2024-06-27 21:22:51,776 INFO L175 Difference]: Start difference. First operand has 355 places, 451 transitions, 6685 flow. Second operand 8 states and 146 transitions. [2024-06-27 21:22:51,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 484 transitions, 8259 flow [2024-06-27 21:22:56,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 484 transitions, 7939 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-27 21:22:56,316 INFO L231 Difference]: Finished difference. Result has 357 places, 454 transitions, 6859 flow [2024-06-27 21:22:56,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6369, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=203, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6859, PETRI_PLACES=357, PETRI_TRANSITIONS=454} [2024-06-27 21:22:56,316 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 313 predicate places. [2024-06-27 21:22:56,316 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 454 transitions, 6859 flow [2024-06-27 21:22:56,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:22:56,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:22:56,317 INFO 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] [2024-06-27 21:22:56,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-27 21:22:56,317 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:22:56,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:22:56,317 INFO L85 PathProgramCache]: Analyzing trace with hash -2126084829, now seen corresponding path program 3 times [2024-06-27 21:22:56,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:22:56,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702494597] [2024-06-27 21:22:56,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:22:56,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:22:56,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:22:59,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:22:59,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:22:59,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702494597] [2024-06-27 21:22:59,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702494597] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:22:59,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:22:59,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:22:59,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157104091] [2024-06-27 21:22:59,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:22:59,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:22:59,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:22:59,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:22:59,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:22:59,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:22:59,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 454 transitions, 6859 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:22:59,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:22:59,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:22:59,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:23:01,911 INFO L124 PetriNetUnfolderBase]: 5363/8549 cut-off events. [2024-06-27 21:23:01,911 INFO L125 PetriNetUnfolderBase]: For 1640907/1640907 co-relation queries the response was YES. [2024-06-27 21:23:02,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69707 conditions, 8549 events. 5363/8549 cut-off events. For 1640907/1640907 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 55035 event pairs, 1508 based on Foata normal form. 2/8537 useless extension candidates. Maximal degree in co-relation 69537. Up to 6475 conditions per place. [2024-06-27 21:23:02,033 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 267 selfloop transitions, 213 changer transitions 0/485 dead transitions. [2024-06-27 21:23:02,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 485 transitions, 8653 flow [2024-06-27 21:23:02,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:23:02,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:23:02,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-27 21:23:02,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-27 21:23:02,034 INFO L175 Difference]: Start difference. First operand has 357 places, 454 transitions, 6859 flow. Second operand 8 states and 147 transitions. [2024-06-27 21:23:02,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 485 transitions, 8653 flow [2024-06-27 21:23:06,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 485 transitions, 8156 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-27 21:23:06,219 INFO L231 Difference]: Finished difference. Result has 359 places, 457 transitions, 6871 flow [2024-06-27 21:23:06,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6373, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=210, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6871, PETRI_PLACES=359, PETRI_TRANSITIONS=457} [2024-06-27 21:23:06,220 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 315 predicate places. [2024-06-27 21:23:06,220 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 457 transitions, 6871 flow [2024-06-27 21:23:06,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:23:06,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:23:06,220 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:23:06,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-27 21:23:06,221 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:23:06,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:23:06,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1667600237, now seen corresponding path program 7 times [2024-06-27 21:23:06,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:23:06,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624779928] [2024-06-27 21:23:06,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:23:06,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:23:06,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:23:09,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:23:09,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:23:09,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624779928] [2024-06-27 21:23:09,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624779928] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:23:09,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:23:09,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:23:09,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950905576] [2024-06-27 21:23:09,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:23:09,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:23:09,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:23:09,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:23:09,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:23:09,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:23:09,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 457 transitions, 6871 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:23:09,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:23:09,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:23:09,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:23:12,355 INFO L124 PetriNetUnfolderBase]: 5373/8587 cut-off events. [2024-06-27 21:23:12,355 INFO L125 PetriNetUnfolderBase]: For 1667305/1667305 co-relation queries the response was YES. [2024-06-27 21:23:12,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69710 conditions, 8587 events. 5373/8587 cut-off events. For 1667305/1667305 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 55353 event pairs, 1217 based on Foata normal form. 2/8587 useless extension candidates. Maximal degree in co-relation 69540. Up to 6481 conditions per place. [2024-06-27 21:23:12,480 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 253 selfloop transitions, 239 changer transitions 0/497 dead transitions. [2024-06-27 21:23:12,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 497 transitions, 8697 flow [2024-06-27 21:23:12,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:23:12,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:23:12,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-27 21:23:12,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392764857881137 [2024-06-27 21:23:12,481 INFO L175 Difference]: Start difference. First operand has 359 places, 457 transitions, 6871 flow. Second operand 9 states and 170 transitions. [2024-06-27 21:23:12,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 497 transitions, 8697 flow [2024-06-27 21:23:16,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 497 transitions, 8133 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-27 21:23:16,888 INFO L231 Difference]: Finished difference. Result has 361 places, 460 transitions, 6842 flow [2024-06-27 21:23:16,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6311, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=236, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6842, PETRI_PLACES=361, PETRI_TRANSITIONS=460} [2024-06-27 21:23:16,888 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 317 predicate places. [2024-06-27 21:23:16,888 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 460 transitions, 6842 flow [2024-06-27 21:23:16,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:23:16,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:23:16,888 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:23:16,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-27 21:23:16,889 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:23:16,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:23:16,889 INFO L85 PathProgramCache]: Analyzing trace with hash 191784883, now seen corresponding path program 4 times [2024-06-27 21:23:16,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:23:16,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236157115] [2024-06-27 21:23:16,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:23:16,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:23:16,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:23:19,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:23:19,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:23:19,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236157115] [2024-06-27 21:23:19,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236157115] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:23:19,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:23:19,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:23:19,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276543126] [2024-06-27 21:23:19,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:23:19,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:23:19,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:23:19,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:23:19,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:23:19,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:23:19,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 460 transitions, 6842 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:23:19,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:23:19,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:23:19,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:23:22,825 INFO L124 PetriNetUnfolderBase]: 5367/8557 cut-off events. [2024-06-27 21:23:22,825 INFO L125 PetriNetUnfolderBase]: For 1682372/1682372 co-relation queries the response was YES. [2024-06-27 21:23:22,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69607 conditions, 8557 events. 5367/8557 cut-off events. For 1682372/1682372 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 55108 event pairs, 1513 based on Foata normal form. 2/8545 useless extension candidates. Maximal degree in co-relation 69436. Up to 6478 conditions per place. [2024-06-27 21:23:22,936 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 272 selfloop transitions, 210 changer transitions 0/487 dead transitions. [2024-06-27 21:23:22,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 487 transitions, 8345 flow [2024-06-27 21:23:22,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:23:22,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:23:22,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-27 21:23:22,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42151162790697677 [2024-06-27 21:23:22,937 INFO L175 Difference]: Start difference. First operand has 361 places, 460 transitions, 6842 flow. Second operand 8 states and 145 transitions. [2024-06-27 21:23:22,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 487 transitions, 8345 flow [2024-06-27 21:23:27,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 487 transitions, 7968 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-27 21:23:27,749 INFO L231 Difference]: Finished difference. Result has 364 places, 460 transitions, 6893 flow [2024-06-27 21:23:27,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6465, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=210, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6893, PETRI_PLACES=364, PETRI_TRANSITIONS=460} [2024-06-27 21:23:27,749 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 320 predicate places. [2024-06-27 21:23:27,749 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 460 transitions, 6893 flow [2024-06-27 21:23:27,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:23:27,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:23:27,749 INFO 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] [2024-06-27 21:23:27,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-27 21:23:27,750 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:23:27,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:23:27,750 INFO L85 PathProgramCache]: Analyzing trace with hash 154127537, now seen corresponding path program 8 times [2024-06-27 21:23:27,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:23:27,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060701366] [2024-06-27 21:23:27,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:23:27,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:23:27,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:23:30,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:23:30,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:23:30,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060701366] [2024-06-27 21:23:30,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060701366] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:23:30,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:23:30,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:23:30,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395354909] [2024-06-27 21:23:30,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:23:30,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:23:30,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:23:30,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:23:30,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:23:30,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:23:30,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 460 transitions, 6893 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:23:30,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:23:30,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:23:30,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:23:33,841 INFO L124 PetriNetUnfolderBase]: 5361/8571 cut-off events. [2024-06-27 21:23:33,841 INFO L125 PetriNetUnfolderBase]: For 1700393/1700393 co-relation queries the response was YES. [2024-06-27 21:23:33,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69514 conditions, 8571 events. 5361/8571 cut-off events. For 1700393/1700393 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 55365 event pairs, 1217 based on Foata normal form. 2/8571 useless extension candidates. Maximal degree in co-relation 69342. Up to 6475 conditions per place. [2024-06-27 21:23:33,976 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 251 selfloop transitions, 239 changer transitions 0/495 dead transitions. [2024-06-27 21:23:33,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 495 transitions, 8442 flow [2024-06-27 21:23:33,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:23:33,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:23:33,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-27 21:23:33,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4315245478036176 [2024-06-27 21:23:33,977 INFO L175 Difference]: Start difference. First operand has 364 places, 460 transitions, 6893 flow. Second operand 9 states and 167 transitions. [2024-06-27 21:23:33,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 495 transitions, 8442 flow [2024-06-27 21:23:38,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 495 transitions, 7993 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-27 21:23:38,622 INFO L231 Difference]: Finished difference. Result has 366 places, 460 transitions, 6928 flow [2024-06-27 21:23:38,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6444, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=239, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6928, PETRI_PLACES=366, PETRI_TRANSITIONS=460} [2024-06-27 21:23:38,622 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 322 predicate places. [2024-06-27 21:23:38,622 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 460 transitions, 6928 flow [2024-06-27 21:23:38,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:23:38,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:23:38,623 INFO 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] [2024-06-27 21:23:38,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-27 21:23:38,623 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:23:38,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:23:38,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1351132223, now seen corresponding path program 5 times [2024-06-27 21:23:38,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:23:38,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579088608] [2024-06-27 21:23:38,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:23:38,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:23:38,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:23:41,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:23:41,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:23:41,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579088608] [2024-06-27 21:23:41,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579088608] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:23:41,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:23:41,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:23:41,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165730335] [2024-06-27 21:23:41,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:23:41,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:23:41,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:23:41,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:23:41,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:23:41,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:23:41,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 460 transitions, 6928 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:23:41,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:23:41,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:23:41,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:23:44,350 INFO L124 PetriNetUnfolderBase]: 5371/8567 cut-off events. [2024-06-27 21:23:44,350 INFO L125 PetriNetUnfolderBase]: For 1731293/1731293 co-relation queries the response was YES. [2024-06-27 21:23:44,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69975 conditions, 8567 events. 5371/8567 cut-off events. For 1731293/1731293 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 55174 event pairs, 1430 based on Foata normal form. 2/8561 useless extension candidates. Maximal degree in co-relation 69802. Up to 7582 conditions per place. [2024-06-27 21:23:44,484 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 380 selfloop transitions, 104 changer transitions 0/489 dead transitions. [2024-06-27 21:23:44,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 489 transitions, 8496 flow [2024-06-27 21:23:44,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:23:44,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:23:44,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-27 21:23:44,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3883720930232558 [2024-06-27 21:23:44,485 INFO L175 Difference]: Start difference. First operand has 366 places, 460 transitions, 6928 flow. Second operand 10 states and 167 transitions. [2024-06-27 21:23:44,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 489 transitions, 8496 flow [2024-06-27 21:23:49,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 489 transitions, 7833 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-27 21:23:49,127 INFO L231 Difference]: Finished difference. Result has 367 places, 463 transitions, 6547 flow [2024-06-27 21:23:49,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6269, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6547, PETRI_PLACES=367, PETRI_TRANSITIONS=463} [2024-06-27 21:23:49,128 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 323 predicate places. [2024-06-27 21:23:49,128 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 463 transitions, 6547 flow [2024-06-27 21:23:49,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:23:49,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:23:49,128 INFO 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] [2024-06-27 21:23:49,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-27 21:23:49,128 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:23:49,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:23:49,129 INFO L85 PathProgramCache]: Analyzing trace with hash 582315683, now seen corresponding path program 6 times [2024-06-27 21:23:49,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:23:49,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894499211] [2024-06-27 21:23:49,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:23:49,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:23:49,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:23:51,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:23:51,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:23:51,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894499211] [2024-06-27 21:23:51,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894499211] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:23:51,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:23:51,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:23:51,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537927864] [2024-06-27 21:23:51,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:23:51,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:23:51,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:23:51,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:23:51,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:23:51,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:23:51,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 463 transitions, 6547 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:23:51,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:23:51,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:23:51,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:23:54,419 INFO L124 PetriNetUnfolderBase]: 5381/8585 cut-off events. [2024-06-27 21:23:54,419 INFO L125 PetriNetUnfolderBase]: For 1749572/1749572 co-relation queries the response was YES. [2024-06-27 21:23:54,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69506 conditions, 8585 events. 5381/8585 cut-off events. For 1749572/1749572 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 55266 event pairs, 1434 based on Foata normal form. 2/8579 useless extension candidates. Maximal degree in co-relation 69332. Up to 7588 conditions per place. [2024-06-27 21:23:54,549 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 383 selfloop transitions, 101 changer transitions 0/489 dead transitions. [2024-06-27 21:23:54,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 489 transitions, 8115 flow [2024-06-27 21:23:54,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:23:54,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:23:54,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-27 21:23:54,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-27 21:23:54,550 INFO L175 Difference]: Start difference. First operand has 367 places, 463 transitions, 6547 flow. Second operand 9 states and 153 transitions. [2024-06-27 21:23:54,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 489 transitions, 8115 flow [2024-06-27 21:23:58,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 489 transitions, 7855 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-27 21:23:58,719 INFO L231 Difference]: Finished difference. Result has 368 places, 466 transitions, 6563 flow [2024-06-27 21:23:58,719 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6291, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6563, PETRI_PLACES=368, PETRI_TRANSITIONS=466} [2024-06-27 21:23:58,719 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 324 predicate places. [2024-06-27 21:23:58,719 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 466 transitions, 6563 flow [2024-06-27 21:23:58,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:23:58,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:23:58,720 INFO 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] [2024-06-27 21:23:58,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-27 21:23:58,720 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:23:58,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:23:58,720 INFO L85 PathProgramCache]: Analyzing trace with hash 582136937, now seen corresponding path program 9 times [2024-06-27 21:23:58,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:23:58,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17130358] [2024-06-27 21:23:58,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:23:58,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:23:58,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:24:01,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:24:01,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:24:01,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17130358] [2024-06-27 21:24:01,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17130358] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:24:01,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:24:01,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:24:01,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194251466] [2024-06-27 21:24:01,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:24:01,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:24:01,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:24:01,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:24:01,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:24:01,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:24:01,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 466 transitions, 6563 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:24:01,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:24:01,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:24:01,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:24:04,209 INFO L124 PetriNetUnfolderBase]: 5375/8594 cut-off events. [2024-06-27 21:24:04,209 INFO L125 PetriNetUnfolderBase]: For 1761809/1761809 co-relation queries the response was YES. [2024-06-27 21:24:04,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69411 conditions, 8594 events. 5375/8594 cut-off events. For 1761809/1761809 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 55525 event pairs, 1482 based on Foata normal form. 2/8595 useless extension candidates. Maximal degree in co-relation 69236. Up to 8108 conditions per place. [2024-06-27 21:24:04,328 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 440 selfloop transitions, 48 changer transitions 0/493 dead transitions. [2024-06-27 21:24:04,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 493 transitions, 7857 flow [2024-06-27 21:24:04,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:24:04,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:24:04,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-27 21:24:04,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-27 21:24:04,329 INFO L175 Difference]: Start difference. First operand has 368 places, 466 transitions, 6563 flow. Second operand 9 states and 153 transitions. [2024-06-27 21:24:04,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 493 transitions, 7857 flow [2024-06-27 21:24:08,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 493 transitions, 7574 flow, removed 21 selfloop flow, removed 8 redundant places. [2024-06-27 21:24:08,759 INFO L231 Difference]: Finished difference. Result has 369 places, 466 transitions, 6382 flow [2024-06-27 21:24:08,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6280, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6382, PETRI_PLACES=369, PETRI_TRANSITIONS=466} [2024-06-27 21:24:08,759 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 325 predicate places. [2024-06-27 21:24:08,759 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 466 transitions, 6382 flow [2024-06-27 21:24:08,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:24:08,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:24:08,759 INFO 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] [2024-06-27 21:24:08,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-27 21:24:08,759 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:24:08,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:24:08,760 INFO L85 PathProgramCache]: Analyzing trace with hash -552286547, now seen corresponding path program 10 times [2024-06-27 21:24:08,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:24:08,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383855587] [2024-06-27 21:24:08,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:24:08,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:24:08,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:24:11,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:24:11,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:24:11,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383855587] [2024-06-27 21:24:11,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383855587] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:24:11,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:24:11,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:24:11,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037274207] [2024-06-27 21:24:11,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:24:11,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:24:11,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:24:11,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:24:11,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:24:11,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:24:11,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 466 transitions, 6382 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:24:11,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:24:11,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:24:11,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:24:14,791 INFO L124 PetriNetUnfolderBase]: 5369/8586 cut-off events. [2024-06-27 21:24:14,792 INFO L125 PetriNetUnfolderBase]: For 1773158/1773158 co-relation queries the response was YES. [2024-06-27 21:24:14,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68905 conditions, 8586 events. 5369/8586 cut-off events. For 1773158/1773158 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 55552 event pairs, 1483 based on Foata normal form. 2/8587 useless extension candidates. Maximal degree in co-relation 68730. Up to 8103 conditions per place. [2024-06-27 21:24:14,900 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 440 selfloop transitions, 48 changer transitions 0/493 dead transitions. [2024-06-27 21:24:14,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 493 transitions, 7440 flow [2024-06-27 21:24:14,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:24:14,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:24:14,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2024-06-27 21:24:14,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3813953488372093 [2024-06-27 21:24:14,901 INFO L175 Difference]: Start difference. First operand has 369 places, 466 transitions, 6382 flow. Second operand 10 states and 164 transitions. [2024-06-27 21:24:14,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 493 transitions, 7440 flow [2024-06-27 21:24:18,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 493 transitions, 7334 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-27 21:24:18,949 INFO L231 Difference]: Finished difference. Result has 372 places, 466 transitions, 6378 flow [2024-06-27 21:24:18,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6276, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6378, PETRI_PLACES=372, PETRI_TRANSITIONS=466} [2024-06-27 21:24:18,949 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 328 predicate places. [2024-06-27 21:24:18,949 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 466 transitions, 6378 flow [2024-06-27 21:24:18,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:24:18,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:24:18,950 INFO 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] [2024-06-27 21:24:18,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-27 21:24:18,950 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:24:18,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:24:18,950 INFO L85 PathProgramCache]: Analyzing trace with hash -552286361, now seen corresponding path program 7 times [2024-06-27 21:24:18,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:24:18,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860410862] [2024-06-27 21:24:18,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:24:18,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:24:18,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:24:21,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:24:21,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:24:21,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860410862] [2024-06-27 21:24:21,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860410862] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:24:21,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:24:21,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:24:21,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721136769] [2024-06-27 21:24:21,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:24:21,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:24:21,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:24:21,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:24:21,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:24:21,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:24:21,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 466 transitions, 6378 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:24:21,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:24:21,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:24:21,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:24:24,437 INFO L124 PetriNetUnfolderBase]: 5363/8565 cut-off events. [2024-06-27 21:24:24,437 INFO L125 PetriNetUnfolderBase]: For 1788864/1788864 co-relation queries the response was YES. [2024-06-27 21:24:24,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68814 conditions, 8565 events. 5363/8565 cut-off events. For 1788864/1788864 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 55178 event pairs, 1439 based on Foata normal form. 2/8559 useless extension candidates. Maximal degree in co-relation 68638. Up to 7579 conditions per place. [2024-06-27 21:24:24,574 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 383 selfloop transitions, 100 changer transitions 0/488 dead transitions. [2024-06-27 21:24:24,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 488 transitions, 7646 flow [2024-06-27 21:24:24,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:24:24,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:24:24,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-27 21:24:24,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39018087855297157 [2024-06-27 21:24:24,575 INFO L175 Difference]: Start difference. First operand has 372 places, 466 transitions, 6378 flow. Second operand 9 states and 151 transitions. [2024-06-27 21:24:24,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 488 transitions, 7646 flow [2024-06-27 21:24:28,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 488 transitions, 7505 flow, removed 19 selfloop flow, removed 9 redundant places. [2024-06-27 21:24:28,865 INFO L231 Difference]: Finished difference. Result has 372 places, 466 transitions, 6445 flow [2024-06-27 21:24:28,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6237, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6445, PETRI_PLACES=372, PETRI_TRANSITIONS=466} [2024-06-27 21:24:28,866 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 328 predicate places. [2024-06-27 21:24:28,866 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 466 transitions, 6445 flow [2024-06-27 21:24:28,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:24:28,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:24:28,866 INFO 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] [2024-06-27 21:24:28,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-27 21:24:28,866 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:24:28,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:24:28,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1690263891, now seen corresponding path program 1 times [2024-06-27 21:24:28,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:24:28,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907072424] [2024-06-27 21:24:28,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:24:28,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:24:28,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:24:31,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:24:31,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:24:31,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907072424] [2024-06-27 21:24:31,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907072424] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:24:31,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:24:31,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:24:31,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313337116] [2024-06-27 21:24:31,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:24:31,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:24:31,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:24:31,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:24:31,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:24:31,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:24:31,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 466 transitions, 6445 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) [2024-06-27 21:24:31,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:24:31,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:24:31,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:24:34,390 INFO L124 PetriNetUnfolderBase]: 5554/8869 cut-off events. [2024-06-27 21:24:34,390 INFO L125 PetriNetUnfolderBase]: For 2043050/2043054 co-relation queries the response was YES. [2024-06-27 21:24:34,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74938 conditions, 8869 events. 5554/8869 cut-off events. For 2043050/2043054 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 57431 event pairs, 1390 based on Foata normal form. 6/8873 useless extension candidates. Maximal degree in co-relation 74761. Up to 7550 conditions per place. [2024-06-27 21:24:34,532 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 375 selfloop transitions, 137 changer transitions 0/517 dead transitions. [2024-06-27 21:24:34,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 517 transitions, 8005 flow [2024-06-27 21:24:34,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:24:34,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:24:34,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-27 21:24:34,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-27 21:24:34,533 INFO L175 Difference]: Start difference. First operand has 372 places, 466 transitions, 6445 flow. Second operand 8 states and 160 transitions. [2024-06-27 21:24:34,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 517 transitions, 8005 flow [2024-06-27 21:24:39,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 517 transitions, 7748 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-27 21:24:39,634 INFO L231 Difference]: Finished difference. Result has 372 places, 474 transitions, 6654 flow [2024-06-27 21:24:39,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6188, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6654, PETRI_PLACES=372, PETRI_TRANSITIONS=474} [2024-06-27 21:24:39,635 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 328 predicate places. [2024-06-27 21:24:39,635 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 474 transitions, 6654 flow [2024-06-27 21:24:39,635 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) [2024-06-27 21:24:39,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:24:39,635 INFO 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] [2024-06-27 21:24:39,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-27 21:24:39,635 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:24:39,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:24:39,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1480037881, now seen corresponding path program 2 times [2024-06-27 21:24:39,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:24:39,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089229664] [2024-06-27 21:24:39,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:24:39,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:24:39,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:24:42,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:24:42,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:24:42,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089229664] [2024-06-27 21:24:42,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089229664] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:24:42,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:24:42,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:24:42,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772033118] [2024-06-27 21:24:42,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:24:42,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:24:42,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:24:42,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:24:42,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:24:42,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:24:42,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 474 transitions, 6654 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) [2024-06-27 21:24:42,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:24:42,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:24:42,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:24:45,316 INFO L124 PetriNetUnfolderBase]: 5549/8868 cut-off events. [2024-06-27 21:24:45,317 INFO L125 PetriNetUnfolderBase]: For 2063538/2063542 co-relation queries the response was YES. [2024-06-27 21:24:45,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75476 conditions, 8868 events. 5549/8868 cut-off events. For 2063538/2063542 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 57509 event pairs, 1404 based on Foata normal form. 6/8872 useless extension candidates. Maximal degree in co-relation 75297. Up to 7770 conditions per place. [2024-06-27 21:24:45,451 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 370 selfloop transitions, 132 changer transitions 0/507 dead transitions. [2024-06-27 21:24:45,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 507 transitions, 7760 flow [2024-06-27 21:24:45,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:24:45,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:24:45,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-27 21:24:45,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-27 21:24:45,452 INFO L175 Difference]: Start difference. First operand has 372 places, 474 transitions, 6654 flow. Second operand 8 states and 150 transitions. [2024-06-27 21:24:45,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 507 transitions, 7760 flow [2024-06-27 21:24:50,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 507 transitions, 7476 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-27 21:24:50,957 INFO L231 Difference]: Finished difference. Result has 375 places, 474 transitions, 6639 flow [2024-06-27 21:24:50,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6370, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6639, PETRI_PLACES=375, PETRI_TRANSITIONS=474} [2024-06-27 21:24:50,957 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 331 predicate places. [2024-06-27 21:24:50,957 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 474 transitions, 6639 flow [2024-06-27 21:24:50,957 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) [2024-06-27 21:24:50,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:24:50,958 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:24:50,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-27 21:24:50,958 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:24:50,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:24:50,958 INFO L85 PathProgramCache]: Analyzing trace with hash 2037530525, now seen corresponding path program 3 times [2024-06-27 21:24:50,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:24:50,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50068386] [2024-06-27 21:24:50,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:24:50,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:24:50,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:24:54,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:24:54,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:24:54,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50068386] [2024-06-27 21:24:54,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50068386] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:24:54,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:24:54,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:24:54,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958286511] [2024-06-27 21:24:54,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:24:54,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:24:54,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:24:54,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:24:54,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:24:54,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:24:54,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 474 transitions, 6639 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) [2024-06-27 21:24:54,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:24:54,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:24:54,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:24:57,467 INFO L124 PetriNetUnfolderBase]: 5557/8877 cut-off events. [2024-06-27 21:24:57,467 INFO L125 PetriNetUnfolderBase]: For 2095732/2095732 co-relation queries the response was YES. [2024-06-27 21:24:57,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75644 conditions, 8877 events. 5557/8877 cut-off events. For 2095732/2095732 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 57474 event pairs, 1409 based on Foata normal form. 2/8877 useless extension candidates. Maximal degree in co-relation 75464. Up to 7782 conditions per place. [2024-06-27 21:24:57,597 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 375 selfloop transitions, 129 changer transitions 0/509 dead transitions. [2024-06-27 21:24:57,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 509 transitions, 7790 flow [2024-06-27 21:24:57,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:24:57,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:24:57,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-27 21:24:57,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4160206718346253 [2024-06-27 21:24:57,599 INFO L175 Difference]: Start difference. First operand has 375 places, 474 transitions, 6639 flow. Second operand 9 states and 161 transitions. [2024-06-27 21:24:57,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 509 transitions, 7790 flow [2024-06-27 21:25:03,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 509 transitions, 7543 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-27 21:25:03,265 INFO L231 Difference]: Finished difference. Result has 379 places, 476 transitions, 6700 flow [2024-06-27 21:25:03,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6392, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6700, PETRI_PLACES=379, PETRI_TRANSITIONS=476} [2024-06-27 21:25:03,266 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 335 predicate places. [2024-06-27 21:25:03,266 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 476 transitions, 6700 flow [2024-06-27 21:25:03,266 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) [2024-06-27 21:25:03,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:25:03,266 INFO 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] [2024-06-27 21:25:03,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-27 21:25:03,268 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)] === [2024-06-27 21:25:03,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:25:03,268 INFO L85 PathProgramCache]: Analyzing trace with hash -2091797637, now seen corresponding path program 4 times [2024-06-27 21:25:03,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:25:03,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405929193] [2024-06-27 21:25:03,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:25:03,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:25:03,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:25:06,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:25:06,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:25:06,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405929193] [2024-06-27 21:25:06,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405929193] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:25:06,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:25:06,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:25:06,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945012728] [2024-06-27 21:25:06,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:25:06,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:25:06,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:25:06,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:25:06,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:25:06,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:25:06,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 476 transitions, 6700 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) [2024-06-27 21:25:06,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:25:06,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:25:06,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:25:08,925 INFO L124 PetriNetUnfolderBase]: 5601/8934 cut-off events. [2024-06-27 21:25:08,925 INFO L125 PetriNetUnfolderBase]: For 2207490/2207490 co-relation queries the response was YES. [2024-06-27 21:25:09,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76328 conditions, 8934 events. 5601/8934 cut-off events. For 2207490/2207490 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 57872 event pairs, 1568 based on Foata normal form. 12/8945 useless extension candidates. Maximal degree in co-relation 76147. Up to 8422 conditions per place. [2024-06-27 21:25:09,052 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 457 selfloop transitions, 39 changer transitions 8/509 dead transitions. [2024-06-27 21:25:09,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 509 transitions, 7867 flow [2024-06-27 21:25:09,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:25:09,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:25:09,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-27 21:25:09,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4005167958656331 [2024-06-27 21:25:09,054 INFO L175 Difference]: Start difference. First operand has 379 places, 476 transitions, 6700 flow. Second operand 9 states and 155 transitions. [2024-06-27 21:25:09,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 509 transitions, 7867 flow [2024-06-27 21:25:13,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 509 transitions, 7588 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-27 21:25:13,183 INFO L231 Difference]: Finished difference. Result has 381 places, 475 transitions, 6481 flow [2024-06-27 21:25:13,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6421, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=437, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6481, PETRI_PLACES=381, PETRI_TRANSITIONS=475} [2024-06-27 21:25:13,183 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 337 predicate places. [2024-06-27 21:25:13,183 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 475 transitions, 6481 flow [2024-06-27 21:25:13,183 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) [2024-06-27 21:25:13,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:25:13,184 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:25:13,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-27 21:25:13,184 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)] === [2024-06-27 21:25:13,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:25:13,184 INFO L85 PathProgramCache]: Analyzing trace with hash -717086213, now seen corresponding path program 11 times [2024-06-27 21:25:13,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:25:13,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029659063] [2024-06-27 21:25:13,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:25:13,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:25:13,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:25:16,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:25:16,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:25:16,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029659063] [2024-06-27 21:25:16,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029659063] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:25:16,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:25:16,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:25:16,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103639858] [2024-06-27 21:25:16,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:25:16,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:25:16,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:25:16,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:25:16,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:25:16,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:25:16,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 475 transitions, 6481 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:25:16,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:25:16,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:25:16,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:25:19,568 INFO L124 PetriNetUnfolderBase]: 5551/8840 cut-off events. [2024-06-27 21:25:19,568 INFO L125 PetriNetUnfolderBase]: For 2146416/2146416 co-relation queries the response was YES. [2024-06-27 21:25:19,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75415 conditions, 8840 events. 5551/8840 cut-off events. For 2146416/2146416 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 56958 event pairs, 1503 based on Foata normal form. 2/8829 useless extension candidates. Maximal degree in co-relation 75233. Up to 6771 conditions per place. [2024-06-27 21:25:19,691 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 293 selfloop transitions, 219 changer transitions 0/517 dead transitions. [2024-06-27 21:25:19,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 517 transitions, 8140 flow [2024-06-27 21:25:19,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:25:19,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:25:19,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-27 21:25:19,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470284237726098 [2024-06-27 21:25:19,692 INFO L175 Difference]: Start difference. First operand has 381 places, 475 transitions, 6481 flow. Second operand 9 states and 173 transitions. [2024-06-27 21:25:19,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 517 transitions, 8140 flow [2024-06-27 21:25:25,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 517 transitions, 8039 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-27 21:25:25,361 INFO L231 Difference]: Finished difference. Result has 384 places, 475 transitions, 6824 flow [2024-06-27 21:25:25,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6380, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=219, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6824, PETRI_PLACES=384, PETRI_TRANSITIONS=475} [2024-06-27 21:25:25,361 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 340 predicate places. [2024-06-27 21:25:25,361 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 475 transitions, 6824 flow [2024-06-27 21:25:25,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:25:25,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:25:25,362 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:25:25,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-27 21:25:25,362 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)] === [2024-06-27 21:25:25,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:25:25,362 INFO L85 PathProgramCache]: Analyzing trace with hash 728239775, now seen corresponding path program 12 times [2024-06-27 21:25:25,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:25:25,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538761639] [2024-06-27 21:25:25,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:25:25,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:25:25,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:25:28,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:25:28,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:25:28,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538761639] [2024-06-27 21:25:28,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538761639] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:25:28,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:25:28,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:25:28,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222161967] [2024-06-27 21:25:28,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:25:28,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:25:28,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:25:28,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:25:28,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:25:28,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:25:28,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 475 transitions, 6824 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:25:28,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:25:28,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:25:28,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:25:31,704 INFO L124 PetriNetUnfolderBase]: 5561/8855 cut-off events. [2024-06-27 21:25:31,704 INFO L125 PetriNetUnfolderBase]: For 2186413/2186413 co-relation queries the response was YES. [2024-06-27 21:25:31,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76754 conditions, 8855 events. 5561/8855 cut-off events. For 2186413/2186413 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 57174 event pairs, 1543 based on Foata normal form. 2/8843 useless extension candidates. Maximal degree in co-relation 76571. Up to 6777 conditions per place. [2024-06-27 21:25:31,830 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 289 selfloop transitions, 219 changer transitions 0/513 dead transitions. [2024-06-27 21:25:31,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 513 transitions, 8274 flow [2024-06-27 21:25:31,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:25:31,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:25:31,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-27 21:25:31,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42377260981912146 [2024-06-27 21:25:31,831 INFO L175 Difference]: Start difference. First operand has 384 places, 475 transitions, 6824 flow. Second operand 9 states and 164 transitions. [2024-06-27 21:25:31,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 513 transitions, 8274 flow [2024-06-27 21:25:38,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 513 transitions, 7786 flow, removed 39 selfloop flow, removed 8 redundant places. [2024-06-27 21:25:38,123 INFO L231 Difference]: Finished difference. Result has 385 places, 478 transitions, 6851 flow [2024-06-27 21:25:38,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6363, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=216, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6851, PETRI_PLACES=385, PETRI_TRANSITIONS=478} [2024-06-27 21:25:38,123 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 341 predicate places. [2024-06-27 21:25:38,123 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 478 transitions, 6851 flow [2024-06-27 21:25:38,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:25:38,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:25:38,124 INFO 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] [2024-06-27 21:25:38,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-27 21:25:38,124 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)] === [2024-06-27 21:25:38,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:25:38,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1561960881, now seen corresponding path program 13 times [2024-06-27 21:25:38,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:25:38,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776731719] [2024-06-27 21:25:38,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:25:38,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:25:38,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:25:40,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:25:40,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:25:40,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776731719] [2024-06-27 21:25:40,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776731719] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:25:40,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:25:40,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:25:40,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565396149] [2024-06-27 21:25:40,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:25:40,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:25:40,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:25:40,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:25:40,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:25:40,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:25:40,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 478 transitions, 6851 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:25:40,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:25:40,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:25:40,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:25:44,066 INFO L124 PetriNetUnfolderBase]: 5571/8877 cut-off events. [2024-06-27 21:25:44,066 INFO L125 PetriNetUnfolderBase]: For 2220504/2220512 co-relation queries the response was YES. [2024-06-27 21:25:44,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76844 conditions, 8877 events. 5571/8877 cut-off events. For 2220504/2220512 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 57319 event pairs, 1275 based on Foata normal form. 10/8879 useless extension candidates. Maximal degree in co-relation 76660. Up to 6783 conditions per place. [2024-06-27 21:25:44,195 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 300 selfloop transitions, 213 changer transitions 0/518 dead transitions. [2024-06-27 21:25:44,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 518 transitions, 8566 flow [2024-06-27 21:25:44,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:25:44,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:25:44,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-27 21:25:44,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45058139534883723 [2024-06-27 21:25:44,196 INFO L175 Difference]: Start difference. First operand has 385 places, 478 transitions, 6851 flow. Second operand 8 states and 155 transitions. [2024-06-27 21:25:44,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 518 transitions, 8566 flow [2024-06-27 21:25:50,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 518 transitions, 8271 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-27 21:25:50,720 INFO L231 Difference]: Finished difference. Result has 387 places, 481 transitions, 7052 flow [2024-06-27 21:25:50,720 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6558, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=210, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7052, PETRI_PLACES=387, PETRI_TRANSITIONS=481} [2024-06-27 21:25:50,721 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 343 predicate places. [2024-06-27 21:25:50,721 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 481 transitions, 7052 flow [2024-06-27 21:25:50,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:25:50,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:25:50,721 INFO 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] [2024-06-27 21:25:50,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-27 21:25:50,721 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:25:50,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:25:50,722 INFO L85 PathProgramCache]: Analyzing trace with hash 213731429, now seen corresponding path program 14 times [2024-06-27 21:25:50,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:25:50,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690713834] [2024-06-27 21:25:50,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:25:50,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:25:50,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:25:53,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:25:53,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:25:53,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690713834] [2024-06-27 21:25:53,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690713834] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:25:53,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:25:53,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:25:53,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559687962] [2024-06-27 21:25:53,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:25:53,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:25:53,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:25:53,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:25:53,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:25:53,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:25:53,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 481 transitions, 7052 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:25:53,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:25:53,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:25:53,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:25:56,665 INFO L124 PetriNetUnfolderBase]: 5581/8895 cut-off events. [2024-06-27 21:25:56,665 INFO L125 PetriNetUnfolderBase]: For 2261790/2261798 co-relation queries the response was YES. [2024-06-27 21:25:56,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77422 conditions, 8895 events. 5581/8895 cut-off events. For 2261790/2261798 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 57455 event pairs, 1275 based on Foata normal form. 10/8897 useless extension candidates. Maximal degree in co-relation 77236. Up to 6789 conditions per place. [2024-06-27 21:25:56,790 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 299 selfloop transitions, 213 changer transitions 0/517 dead transitions. [2024-06-27 21:25:56,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 517 transitions, 8763 flow [2024-06-27 21:25:56,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:25:56,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:25:56,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-27 21:25:56,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-27 21:25:56,791 INFO L175 Difference]: Start difference. First operand has 387 places, 481 transitions, 7052 flow. Second operand 8 states and 150 transitions. [2024-06-27 21:25:56,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 517 transitions, 8763 flow [2024-06-27 21:26:03,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 517 transitions, 7827 flow, removed 53 selfloop flow, removed 9 redundant places. [2024-06-27 21:26:03,069 INFO L231 Difference]: Finished difference. Result has 386 places, 484 transitions, 6616 flow [2024-06-27 21:26:03,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6146, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=210, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6616, PETRI_PLACES=386, PETRI_TRANSITIONS=484} [2024-06-27 21:26:03,069 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 342 predicate places. [2024-06-27 21:26:03,069 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 484 transitions, 6616 flow [2024-06-27 21:26:03,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:26:03,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:26:03,069 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:26:03,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-27 21:26:03,070 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:26:03,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:26:03,070 INFO L85 PathProgramCache]: Analyzing trace with hash -773836699, now seen corresponding path program 15 times [2024-06-27 21:26:03,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:26:03,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569586007] [2024-06-27 21:26:03,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:26:03,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:26:03,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:26:05,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:26:05,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:26:05,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569586007] [2024-06-27 21:26:05,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569586007] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:26:05,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:26:05,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:26:05,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125637380] [2024-06-27 21:26:05,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:26:05,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:26:05,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:26:05,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:26:05,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:26:05,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:26:05,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 484 transitions, 6616 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:26:05,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:26:05,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:26:05,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:26:09,092 INFO L124 PetriNetUnfolderBase]: 5675/9037 cut-off events. [2024-06-27 21:26:09,093 INFO L125 PetriNetUnfolderBase]: For 2386522/2386530 co-relation queries the response was YES. [2024-06-27 21:26:09,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78532 conditions, 9037 events. 5675/9037 cut-off events. For 2386522/2386530 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 58508 event pairs, 1293 based on Foata normal form. 14/9043 useless extension candidates. Maximal degree in co-relation 78348. Up to 6859 conditions per place. [2024-06-27 21:26:09,215 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 301 selfloop transitions, 218 changer transitions 0/524 dead transitions. [2024-06-27 21:26:09,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 524 transitions, 8431 flow [2024-06-27 21:26:09,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:26:09,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:26:09,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-27 21:26:09,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-27 21:26:09,216 INFO L175 Difference]: Start difference. First operand has 386 places, 484 transitions, 6616 flow. Second operand 8 states and 149 transitions. [2024-06-27 21:26:09,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 524 transitions, 8431 flow [2024-06-27 21:26:15,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 524 transitions, 8010 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-27 21:26:15,375 INFO L231 Difference]: Finished difference. Result has 389 places, 494 transitions, 6812 flow [2024-06-27 21:26:15,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6211, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=208, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6812, PETRI_PLACES=389, PETRI_TRANSITIONS=494} [2024-06-27 21:26:15,375 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 345 predicate places. [2024-06-27 21:26:15,375 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 494 transitions, 6812 flow [2024-06-27 21:26:15,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:26:15,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:26:15,376 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:26:15,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-27 21:26:15,376 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:26:15,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:26:15,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1678303585, now seen corresponding path program 16 times [2024-06-27 21:26:15,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:26:15,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650757351] [2024-06-27 21:26:15,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:26:15,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:26:15,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:26:18,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:26:18,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:26:18,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650757351] [2024-06-27 21:26:18,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650757351] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:26:18,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:26:18,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:26:18,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765705080] [2024-06-27 21:26:18,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:26:18,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:26:18,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:26:18,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:26:18,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:26:18,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:26:18,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 494 transitions, 6812 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:26:18,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:26:18,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:26:18,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:26:21,759 INFO L124 PetriNetUnfolderBase]: 5701/9073 cut-off events. [2024-06-27 21:26:21,759 INFO L125 PetriNetUnfolderBase]: For 2410366/2410366 co-relation queries the response was YES. [2024-06-27 21:26:21,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79316 conditions, 9073 events. 5701/9073 cut-off events. For 2410366/2410366 co-relation queries the response was YES. Maximal size of possible extension queue 518. Compared 58742 event pairs, 1584 based on Foata normal form. 2/9061 useless extension candidates. Maximal degree in co-relation 79131. Up to 6874 conditions per place. [2024-06-27 21:26:21,882 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 291 selfloop transitions, 237 changer transitions 0/533 dead transitions. [2024-06-27 21:26:21,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 533 transitions, 8594 flow [2024-06-27 21:26:21,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:26:21,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:26:21,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-27 21:26:21,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-27 21:26:21,883 INFO L175 Difference]: Start difference. First operand has 389 places, 494 transitions, 6812 flow. Second operand 9 states and 162 transitions. [2024-06-27 21:26:21,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 533 transitions, 8594 flow [2024-06-27 21:26:27,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 533 transitions, 8288 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-27 21:26:27,689 INFO L231 Difference]: Finished difference. Result has 395 places, 500 transitions, 7101 flow [2024-06-27 21:26:27,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6510, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=231, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7101, PETRI_PLACES=395, PETRI_TRANSITIONS=500} [2024-06-27 21:26:27,689 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 351 predicate places. [2024-06-27 21:26:27,689 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 500 transitions, 7101 flow [2024-06-27 21:26:27,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:26:27,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:26:27,689 INFO 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] [2024-06-27 21:26:27,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-27 21:26:27,690 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:26:27,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:26:27,690 INFO L85 PathProgramCache]: Analyzing trace with hash 739281665, now seen corresponding path program 17 times [2024-06-27 21:26:27,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:26:27,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381965080] [2024-06-27 21:26:27,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:26:27,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:26:27,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:26:30,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:26:30,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:26:30,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381965080] [2024-06-27 21:26:30,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381965080] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:26:30,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:26:30,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:26:30,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57409950] [2024-06-27 21:26:30,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:26:30,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:26:30,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:26:30,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:26:30,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:26:30,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:26:30,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 500 transitions, 7101 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:26:30,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:26:30,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:26:30,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:26:34,206 INFO L124 PetriNetUnfolderBase]: 5695/9065 cut-off events. [2024-06-27 21:26:34,206 INFO L125 PetriNetUnfolderBase]: For 2435326/2435326 co-relation queries the response was YES. [2024-06-27 21:26:34,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79429 conditions, 9065 events. 5695/9065 cut-off events. For 2435326/2435326 co-relation queries the response was YES. Maximal size of possible extension queue 518. Compared 58721 event pairs, 1589 based on Foata normal form. 2/9053 useless extension candidates. Maximal degree in co-relation 79242. Up to 6871 conditions per place. [2024-06-27 21:26:34,337 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 292 selfloop transitions, 234 changer transitions 0/531 dead transitions. [2024-06-27 21:26:34,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 531 transitions, 8518 flow [2024-06-27 21:26:34,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:26:34,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:26:34,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-27 21:26:34,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4108527131782946 [2024-06-27 21:26:34,338 INFO L175 Difference]: Start difference. First operand has 395 places, 500 transitions, 7101 flow. Second operand 9 states and 159 transitions. [2024-06-27 21:26:34,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 531 transitions, 8518 flow [2024-06-27 21:26:40,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 531 transitions, 8192 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-27 21:26:40,805 INFO L231 Difference]: Finished difference. Result has 399 places, 500 transitions, 7249 flow [2024-06-27 21:26:40,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6775, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=500, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=234, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7249, PETRI_PLACES=399, PETRI_TRANSITIONS=500} [2024-06-27 21:26:40,805 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 355 predicate places. [2024-06-27 21:26:40,805 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 500 transitions, 7249 flow [2024-06-27 21:26:40,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:26:40,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:26:40,806 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:26:40,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-27 21:26:40,806 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:26:40,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:26:40,806 INFO L85 PathProgramCache]: Analyzing trace with hash -754947911, now seen corresponding path program 18 times [2024-06-27 21:26:40,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:26:40,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722128159] [2024-06-27 21:26:40,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:26:40,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:26:40,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:26:43,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:26:43,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:26:43,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722128159] [2024-06-27 21:26:43,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722128159] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:26:43,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:26:43,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:26:43,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118184231] [2024-06-27 21:26:43,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:26:43,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:26:43,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:26:43,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:26:43,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:26:44,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:26:44,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 500 transitions, 7249 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:26:44,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:26:44,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:26:44,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:26:47,352 INFO L124 PetriNetUnfolderBase]: 5677/9041 cut-off events. [2024-06-27 21:26:47,352 INFO L125 PetriNetUnfolderBase]: For 2460495/2460495 co-relation queries the response was YES. [2024-06-27 21:26:47,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78910 conditions, 9041 events. 5677/9041 cut-off events. For 2460495/2460495 co-relation queries the response was YES. Maximal size of possible extension queue 518. Compared 58591 event pairs, 1490 based on Foata normal form. 6/9033 useless extension candidates. Maximal degree in co-relation 78721. Up to 6860 conditions per place. [2024-06-27 21:26:47,484 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 296 selfloop transitions, 231 changer transitions 0/532 dead transitions. [2024-06-27 21:26:47,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 532 transitions, 8924 flow [2024-06-27 21:26:47,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:26:47,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:26:47,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-27 21:26:47,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263565891472868 [2024-06-27 21:26:47,486 INFO L175 Difference]: Start difference. First operand has 399 places, 500 transitions, 7249 flow. Second operand 9 states and 165 transitions. [2024-06-27 21:26:47,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 532 transitions, 8924 flow [2024-06-27 21:26:53,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 532 transitions, 8272 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-27 21:26:53,882 INFO L231 Difference]: Finished difference. Result has 399 places, 500 transitions, 7066 flow [2024-06-27 21:26:53,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6597, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=500, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=231, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7066, PETRI_PLACES=399, PETRI_TRANSITIONS=500} [2024-06-27 21:26:53,882 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 355 predicate places. [2024-06-27 21:26:53,882 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 500 transitions, 7066 flow [2024-06-27 21:26:53,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:26:53,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:26:53,882 INFO 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] [2024-06-27 21:26:53,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-27 21:26:53,883 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:26:53,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:26:53,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1901821749, now seen corresponding path program 19 times [2024-06-27 21:26:53,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:26:53,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657892970] [2024-06-27 21:26:53,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:26:53,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:26:53,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:26:56,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:26:56,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:26:56,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657892970] [2024-06-27 21:26:56,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657892970] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:26:56,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:26:56,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:26:56,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396326804] [2024-06-27 21:26:56,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:26:56,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:26:56,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:26:56,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:26:56,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:26:56,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:26:56,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 500 transitions, 7066 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:26:56,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:26:56,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:26:56,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:00,536 INFO L124 PetriNetUnfolderBase]: 5659/9017 cut-off events. [2024-06-27 21:27:00,536 INFO L125 PetriNetUnfolderBase]: For 2433536/2433536 co-relation queries the response was YES. [2024-06-27 21:27:00,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78108 conditions, 9017 events. 5659/9017 cut-off events. For 2433536/2433536 co-relation queries the response was YES. Maximal size of possible extension queue 518. Compared 58474 event pairs, 1481 based on Foata normal form. 6/9009 useless extension candidates. Maximal degree in co-relation 77919. Up to 6849 conditions per place. [2024-06-27 21:27:00,684 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 295 selfloop transitions, 238 changer transitions 0/538 dead transitions. [2024-06-27 21:27:00,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 538 transitions, 9035 flow [2024-06-27 21:27:00,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:27:00,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:27:00,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 198 transitions. [2024-06-27 21:27:00,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-27 21:27:00,685 INFO L175 Difference]: Start difference. First operand has 399 places, 500 transitions, 7066 flow. Second operand 11 states and 198 transitions. [2024-06-27 21:27:00,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 538 transitions, 9035 flow Killed by 15