./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe001_rmo.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/safe001_rmo.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe001_rmo.oepc.i ./goblint.2024-06-19_11-23-25.files/protection/safe001_rmo.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 17:17:41,639 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 17:17:41,696 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 17:17:41,701 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 17:17:41,701 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 17:17:41,724 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 17:17:41,725 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 17:17:41,725 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 17:17:41,726 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 17:17:41,726 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 17:17:41,726 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 17:17:41,727 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 17:17:41,727 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 17:17:41,728 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 17:17:41,728 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 17:17:41,728 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 17:17:41,729 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 17:17:41,729 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 17:17:41,730 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 17:17:41,730 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 17:17:41,730 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 17:17:41,731 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 17:17:41,731 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 17:17:41,732 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 17:17:41,732 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 17:17:41,732 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 17:17:41,733 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 17:17:41,733 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 17:17:41,733 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 17:17:41,734 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 17:17:41,734 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 17:17:41,734 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 17:17:41,735 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 17:17:41,735 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 17:17:41,735 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 17:17:41,736 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 17:17:41,736 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 17:17:41,736 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 17:17:41,737 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 17:17:41,737 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 17:17:41,737 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 17:17:41,742 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 17:17:41,742 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 17:17:41,743 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 17:17:41,994 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 17:17:42,020 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 17:17:42,023 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 17:17:42,024 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 17:17:42,025 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 17:17:42,026 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe001_rmo.oepc.i [2024-06-21 17:17:43,186 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 17:17:43,484 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 17:17:43,486 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe001_rmo.oepc.i [2024-06-21 17:17:43,510 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fc1161076/95c25fc64c854a88b769a72c932a2bd7/FLAG03e9f8557 [2024-06-21 17:17:43,526 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fc1161076/95c25fc64c854a88b769a72c932a2bd7 [2024-06-21 17:17:43,529 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 17:17:43,529 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 17:17:43,530 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe001_rmo.oepc.yml/witness.yml [2024-06-21 17:17:43,742 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 17:17:43,743 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 17:17:43,744 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 17:17:43,744 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 17:17:43,749 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 17:17:43,749 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 05:17:43" (1/2) ... [2024-06-21 17:17:43,750 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b2b89b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:17:43, skipping insertion in model container [2024-06-21 17:17:43,750 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 05:17:43" (1/2) ... [2024-06-21 17:17:43,752 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4346b21b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:17:43, skipping insertion in model container [2024-06-21 17:17:43,752 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 05:17:43" (2/2) ... [2024-06-21 17:17:43,753 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b2b89b2 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:17:43, skipping insertion in model container [2024-06-21 17:17:43,753 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 05:17:43" (2/2) ... [2024-06-21 17:17:43,753 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 17:17:43,910 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 17:17:43,911 INFO L97 edCorrectnessWitness]: Location invariant before [L856-L856] (((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2))))) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0) [2024-06-21 17:17:43,911 INFO L97 edCorrectnessWitness]: Location invariant before [L855-L855] (((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2))))) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0) [2024-06-21 17:17:43,912 INFO L97 edCorrectnessWitness]: Location invariant before [L853-L853] (((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2))))) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0) [2024-06-21 17:17:43,912 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 17:17:43,912 INFO L106 edCorrectnessWitness]: ghost_update [L851-L851] multithreaded = 1; [2024-06-21 17:17:43,958 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 17:17:44,350 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 17:17:44,371 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 17:17:44,533 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 17:17:44,567 INFO L206 MainTranslator]: Completed translation [2024-06-21 17:17:44,568 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:17:44 WrapperNode [2024-06-21 17:17:44,568 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 17:17:44,568 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 17:17:44,569 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 17:17:44,569 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 17:17:44,575 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:17:44" (1/1) ... [2024-06-21 17:17:44,592 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:17:44" (1/1) ... [2024-06-21 17:17:44,625 INFO L138 Inliner]: procedures = 175, calls = 89, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 228 [2024-06-21 17:17:44,626 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 17:17:44,626 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 17:17:44,626 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 17:17:44,627 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 17:17:44,636 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:17:44" (1/1) ... [2024-06-21 17:17:44,637 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:17:44" (1/1) ... [2024-06-21 17:17:44,641 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:17:44" (1/1) ... [2024-06-21 17:17:44,659 INFO L175 MemorySlicer]: Split 48 memory accesses to 2 slices as follows [46, 2]. 96 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [1, 2]. The 11 writes are split as follows [11, 0]. [2024-06-21 17:17:44,659 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:17:44" (1/1) ... [2024-06-21 17:17:44,659 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:17:44" (1/1) ... [2024-06-21 17:17:44,672 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:17:44" (1/1) ... [2024-06-21 17:17:44,676 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:17:44" (1/1) ... [2024-06-21 17:17:44,679 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:17:44" (1/1) ... [2024-06-21 17:17:44,681 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:17:44" (1/1) ... [2024-06-21 17:17:44,687 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 17:17:44,688 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 17:17:44,688 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 17:17:44,688 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 17:17:44,688 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:17:44" (1/1) ... [2024-06-21 17:17:44,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 17:17:44,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 17:17:44,744 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-21 17:17:44,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-21 17:17:44,789 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-21 17:17:44,789 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-21 17:17:44,789 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-21 17:17:44,790 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-21 17:17:44,790 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 17:17:44,790 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 17:17:44,790 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 17:17:44,790 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 17:17:44,791 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 17:17:44,791 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 17:17:44,791 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 17:17:44,791 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 17:17:44,791 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 17:17:44,792 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-21 17:17:44,792 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 17:17:44,792 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 17:17:44,794 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 17:17:44,796 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 17:17:44,967 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 17:17:44,969 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 17:17:45,524 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 17:17:45,524 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 17:17:45,934 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 17:17:45,935 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 17:17:45,935 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 05:17:45 BoogieIcfgContainer [2024-06-21 17:17:45,935 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 17:17:45,937 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 17:17:45,937 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 17:17:45,940 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 17:17:45,940 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 05:17:43" (1/4) ... [2024-06-21 17:17:45,940 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31df50d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 05:17:45, skipping insertion in model container [2024-06-21 17:17:45,941 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 05:17:43" (2/4) ... [2024-06-21 17:17:45,941 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31df50d0 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 05:17:45, skipping insertion in model container [2024-06-21 17:17:45,941 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:17:44" (3/4) ... [2024-06-21 17:17:45,941 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31df50d0 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 05:17:45, skipping insertion in model container [2024-06-21 17:17:45,941 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 05:17:45" (4/4) ... [2024-06-21 17:17:45,942 INFO L112 eAbstractionObserver]: Analyzing ICFG safe001_rmo.oepc.i [2024-06-21 17:17:45,959 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 17:17:45,959 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 17:17:45,959 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 17:17:46,055 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 17:17:46,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-21 17:17:46,115 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-21 17:17:46,115 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 17:17:46,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 53 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 17:17:46,117 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-21 17:17:46,120 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-21 17:17:46,128 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 17:17:46,133 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;@6f57ac82, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 17:17:46,134 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 17:17:46,139 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 17:17:46,139 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-21 17:17:46,139 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 17:17:46,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:17:46,140 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 17:17:46,140 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:17:46,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:17:46,145 INFO L85 PathProgramCache]: Analyzing trace with hash 816939740, now seen corresponding path program 1 times [2024-06-21 17:17:46,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:17:46,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407543320] [2024-06-21 17:17:46,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:17:46,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:17:46,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:17:48,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:17:48,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:17:48,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407543320] [2024-06-21 17:17:48,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407543320] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:17:48,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:17:48,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 17:17:48,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055799589] [2024-06-21 17:17:48,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:17:48,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 17:17:48,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:17:48,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 17:17:48,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 17:17:48,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:17:48,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:17:48,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:17:48,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:17:48,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:17:48,883 INFO L124 PetriNetUnfolderBase]: 1409/2137 cut-off events. [2024-06-21 17:17:48,883 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-06-21 17:17:48,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4335 conditions, 2137 events. 1409/2137 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 10005 event pairs, 873 based on Foata normal form. 2/2102 useless extension candidates. Maximal degree in co-relation 4323. Up to 2108 conditions per place. [2024-06-21 17:17:48,899 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 37 selfloop transitions, 4 changer transitions 0/46 dead transitions. [2024-06-21 17:17:48,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 46 transitions, 189 flow [2024-06-21 17:17:48,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 17:17:48,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 17:17:48,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 68 transitions. [2024-06-21 17:17:48,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5396825396825397 [2024-06-21 17:17:48,911 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 68 transitions. [2024-06-21 17:17:48,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 46 transitions, 189 flow [2024-06-21 17:17:48,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 46 transitions, 184 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 17:17:48,916 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-21 17:17:48,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-21 17:17:48,920 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-21 17:17:48,920 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-21 17:17:48,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:17:48,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:17:48,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:17:48,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 17:17:48,922 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:17:48,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:17:48,922 INFO L85 PathProgramCache]: Analyzing trace with hash -899867621, now seen corresponding path program 1 times [2024-06-21 17:17:48,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:17:48,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465253229] [2024-06-21 17:17:48,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:17:48,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:17:48,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:17:51,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:17:51,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:17:51,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465253229] [2024-06-21 17:17:51,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465253229] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:17:51,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:17:51,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 17:17:51,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501704511] [2024-06-21 17:17:51,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:17:51,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 17:17:51,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:17:51,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 17:17:51,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-21 17:17:51,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:17:51,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:17:51,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:17:51,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:17:51,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:17:51,969 INFO L124 PetriNetUnfolderBase]: 1400/2124 cut-off events. [2024-06-21 17:17:51,969 INFO L125 PetriNetUnfolderBase]: For 387/387 co-relation queries the response was YES. [2024-06-21 17:17:51,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4874 conditions, 2124 events. 1400/2124 cut-off events. For 387/387 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9969 event pairs, 726 based on Foata normal form. 4/2125 useless extension candidates. Maximal degree in co-relation 4862. Up to 2071 conditions per place. [2024-06-21 17:17:51,983 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 47 selfloop transitions, 7 changer transitions 0/59 dead transitions. [2024-06-21 17:17:51,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 59 transitions, 268 flow [2024-06-21 17:17:51,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 17:17:51,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 17:17:51,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 89 transitions. [2024-06-21 17:17:51,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5297619047619048 [2024-06-21 17:17:51,987 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 89 transitions. [2024-06-21 17:17:51,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 59 transitions, 268 flow [2024-06-21 17:17:51,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 59 transitions, 264 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 17:17:51,991 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-21 17:17:51,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2024-06-21 17:17:51,994 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-21 17:17:51,995 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-21 17:17:51,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:17:51,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:17:51,996 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:17:52,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 17:17:52,002 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:17:52,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:17:52,010 INFO L85 PathProgramCache]: Analyzing trace with hash -2126090620, now seen corresponding path program 1 times [2024-06-21 17:17:52,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:17:52,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958041603] [2024-06-21 17:17:52,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:17:52,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:17:52,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:17:54,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:17:54,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:17:54,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958041603] [2024-06-21 17:17:54,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958041603] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:17:54,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:17:54,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 17:17:54,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700968626] [2024-06-21 17:17:54,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:17:54,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 17:17:54,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:17:54,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 17:17:54,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 17:17:54,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:17:54,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 138 flow. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:17:54,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:17:54,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:17:54,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:17:55,272 INFO L124 PetriNetUnfolderBase]: 1414/2157 cut-off events. [2024-06-21 17:17:55,273 INFO L125 PetriNetUnfolderBase]: For 1112/1112 co-relation queries the response was YES. [2024-06-21 17:17:55,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5477 conditions, 2157 events. 1414/2157 cut-off events. For 1112/1112 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 10269 event pairs, 512 based on Foata normal form. 7/2160 useless extension candidates. Maximal degree in co-relation 5463. Up to 1977 conditions per place. [2024-06-21 17:17:55,289 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 63 selfloop transitions, 16 changer transitions 0/84 dead transitions. [2024-06-21 17:17:55,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 84 transitions, 434 flow [2024-06-21 17:17:55,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 17:17:55,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 17:17:55,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-21 17:17:55,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5619047619047619 [2024-06-21 17:17:55,295 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 5 states and 118 transitions. [2024-06-21 17:17:55,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 84 transitions, 434 flow [2024-06-21 17:17:55,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 84 transitions, 420 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-21 17:17:55,300 INFO L231 Difference]: Finished difference. Result has 51 places, 50 transitions, 237 flow [2024-06-21 17:17:55,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=237, PETRI_PLACES=51, PETRI_TRANSITIONS=50} [2024-06-21 17:17:55,302 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 8 predicate places. [2024-06-21 17:17:55,302 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 50 transitions, 237 flow [2024-06-21 17:17:55,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:17:55,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:17:55,302 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:17:55,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 17:17:55,303 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:17:55,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:17:55,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1230218167, now seen corresponding path program 1 times [2024-06-21 17:17:55,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:17:55,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600357530] [2024-06-21 17:17:55,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:17:55,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:17:55,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:17:57,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:17:57,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:17:57,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600357530] [2024-06-21 17:17:57,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600357530] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:17:57,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:17:57,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 17:17:57,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051279559] [2024-06-21 17:17:57,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:17:57,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 17:17:57,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:17:57,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 17:17:57,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 17:17:57,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:17:57,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 50 transitions, 237 flow. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:17:57,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:17:57,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:17:57,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:17:58,953 INFO L124 PetriNetUnfolderBase]: 1435/2192 cut-off events. [2024-06-21 17:17:58,953 INFO L125 PetriNetUnfolderBase]: For 2633/2633 co-relation queries the response was YES. [2024-06-21 17:17:58,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6591 conditions, 2192 events. 1435/2192 cut-off events. For 2633/2633 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 10510 event pairs, 349 based on Foata normal form. 14/2202 useless extension candidates. Maximal degree in co-relation 6574. Up to 1924 conditions per place. [2024-06-21 17:17:58,966 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 69 selfloop transitions, 19 changer transitions 0/93 dead transitions. [2024-06-21 17:17:58,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 93 transitions, 545 flow [2024-06-21 17:17:58,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:17:58,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:17:58,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 135 transitions. [2024-06-21 17:17:58,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-06-21 17:17:58,968 INFO L175 Difference]: Start difference. First operand has 51 places, 50 transitions, 237 flow. Second operand 6 states and 135 transitions. [2024-06-21 17:17:58,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 93 transitions, 545 flow [2024-06-21 17:17:58,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 93 transitions, 537 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-21 17:17:58,973 INFO L231 Difference]: Finished difference. Result has 56 places, 52 transitions, 293 flow [2024-06-21 17:17:58,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=293, PETRI_PLACES=56, PETRI_TRANSITIONS=52} [2024-06-21 17:17:58,974 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 13 predicate places. [2024-06-21 17:17:58,975 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 52 transitions, 293 flow [2024-06-21 17:17:58,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:17:58,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:17:58,975 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:17:58,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 17:17:58,975 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:17:58,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:17:58,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1804278239, now seen corresponding path program 1 times [2024-06-21 17:17:58,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:17:58,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899117460] [2024-06-21 17:17:58,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:17:58,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:17:58,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:18:00,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:18:00,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:18:00,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899117460] [2024-06-21 17:18:00,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899117460] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:18:00,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:18:00,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 17:18:00,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214125759] [2024-06-21 17:18:00,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:18:00,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 17:18:00,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:18:00,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 17:18:00,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 17:18:00,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:18:00,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 52 transitions, 293 flow. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:18:00,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:18:00,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:18:00,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:18:01,534 INFO L124 PetriNetUnfolderBase]: 1427/2180 cut-off events. [2024-06-21 17:18:01,534 INFO L125 PetriNetUnfolderBase]: For 3892/3892 co-relation queries the response was YES. [2024-06-21 17:18:01,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7157 conditions, 2180 events. 1427/2180 cut-off events. For 3892/3892 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 10398 event pairs, 503 based on Foata normal form. 3/2180 useless extension candidates. Maximal degree in co-relation 7136. Up to 2124 conditions per place. [2024-06-21 17:18:01,550 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 56 selfloop transitions, 8 changer transitions 0/68 dead transitions. [2024-06-21 17:18:01,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 68 transitions, 459 flow [2024-06-21 17:18:01,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 17:18:01,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 17:18:01,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 87 transitions. [2024-06-21 17:18:01,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142857142857143 [2024-06-21 17:18:01,556 INFO L175 Difference]: Start difference. First operand has 56 places, 52 transitions, 293 flow. Second operand 5 states and 87 transitions. [2024-06-21 17:18:01,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 68 transitions, 459 flow [2024-06-21 17:18:01,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 68 transitions, 409 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-21 17:18:01,565 INFO L231 Difference]: Finished difference. Result has 57 places, 52 transitions, 267 flow [2024-06-21 17:18:01,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=267, PETRI_PLACES=57, PETRI_TRANSITIONS=52} [2024-06-21 17:18:01,567 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 14 predicate places. [2024-06-21 17:18:01,568 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 52 transitions, 267 flow [2024-06-21 17:18:01,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:18:01,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:18:01,568 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:18:01,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 17:18:01,568 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:18:01,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:18:01,569 INFO L85 PathProgramCache]: Analyzing trace with hash 69424172, now seen corresponding path program 1 times [2024-06-21 17:18:01,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:18:01,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974661172] [2024-06-21 17:18:01,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:18:01,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:18:01,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:18:03,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:18:03,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:18:03,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974661172] [2024-06-21 17:18:03,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974661172] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:18:03,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:18:03,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:18:03,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273788819] [2024-06-21 17:18:03,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:18:03,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:18:03,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:18:03,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:18:03,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:18:03,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:18:03,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 52 transitions, 267 flow. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:18:03,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:18:03,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:18:03,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:18:04,397 INFO L124 PetriNetUnfolderBase]: 1417/2162 cut-off events. [2024-06-21 17:18:04,397 INFO L125 PetriNetUnfolderBase]: For 4555/4555 co-relation queries the response was YES. [2024-06-21 17:18:04,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7079 conditions, 2162 events. 1417/2162 cut-off events. For 4555/4555 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 10153 event pairs, 551 based on Foata normal form. 4/2163 useless extension candidates. Maximal degree in co-relation 7056. Up to 2096 conditions per place. [2024-06-21 17:18:04,409 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 66 selfloop transitions, 11 changer transitions 0/81 dead transitions. [2024-06-21 17:18:04,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 81 transitions, 521 flow [2024-06-21 17:18:04,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:18:04,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:18:04,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-21 17:18:04,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4007936507936508 [2024-06-21 17:18:04,411 INFO L175 Difference]: Start difference. First operand has 57 places, 52 transitions, 267 flow. Second operand 6 states and 101 transitions. [2024-06-21 17:18:04,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 81 transitions, 521 flow [2024-06-21 17:18:04,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 81 transitions, 489 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-21 17:18:04,416 INFO L231 Difference]: Finished difference. Result has 61 places, 61 transitions, 339 flow [2024-06-21 17:18:04,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=339, PETRI_PLACES=61, PETRI_TRANSITIONS=61} [2024-06-21 17:18:04,420 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 18 predicate places. [2024-06-21 17:18:04,420 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 61 transitions, 339 flow [2024-06-21 17:18:04,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:18:04,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:18:04,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:18:04,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 17:18:04,421 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:18:04,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:18:04,421 INFO L85 PathProgramCache]: Analyzing trace with hash -86868300, now seen corresponding path program 1 times [2024-06-21 17:18:04,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:18:04,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235162636] [2024-06-21 17:18:04,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:18:04,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:18:04,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:18:06,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:18:06,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:18:06,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235162636] [2024-06-21 17:18:06,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235162636] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:18:06,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:18:06,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:18:06,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002781936] [2024-06-21 17:18:06,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:18:06,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:18:06,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:18:06,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:18:06,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:18:06,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:18:06,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 61 transitions, 339 flow. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:18:06,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:18:06,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:18:06,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:18:07,961 INFO L124 PetriNetUnfolderBase]: 1427/2178 cut-off events. [2024-06-21 17:18:07,961 INFO L125 PetriNetUnfolderBase]: For 5853/5856 co-relation queries the response was YES. [2024-06-21 17:18:07,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7681 conditions, 2178 events. 1427/2178 cut-off events. For 5853/5856 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 10333 event pairs, 496 based on Foata normal form. 8/2182 useless extension candidates. Maximal degree in co-relation 7656. Up to 1997 conditions per place. [2024-06-21 17:18:07,986 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 65 selfloop transitions, 22 changer transitions 0/91 dead transitions. [2024-06-21 17:18:07,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 91 transitions, 627 flow [2024-06-21 17:18:07,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:18:07,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:18:07,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 113 transitions. [2024-06-21 17:18:07,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44841269841269843 [2024-06-21 17:18:07,990 INFO L175 Difference]: Start difference. First operand has 61 places, 61 transitions, 339 flow. Second operand 6 states and 113 transitions. [2024-06-21 17:18:07,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 91 transitions, 627 flow [2024-06-21 17:18:07,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 91 transitions, 621 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-21 17:18:07,997 INFO L231 Difference]: Finished difference. Result has 66 places, 64 transitions, 411 flow [2024-06-21 17:18:07,997 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=333, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=411, PETRI_PLACES=66, PETRI_TRANSITIONS=64} [2024-06-21 17:18:07,998 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 23 predicate places. [2024-06-21 17:18:07,998 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 64 transitions, 411 flow [2024-06-21 17:18:07,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:18:07,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:18:07,999 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:18:07,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 17:18:07,999 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:18:07,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:18:07,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1255350178, now seen corresponding path program 2 times [2024-06-21 17:18:07,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:18:08,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616215305] [2024-06-21 17:18:08,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:18:08,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:18:08,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:18:10,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:18:10,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:18:10,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616215305] [2024-06-21 17:18:10,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616215305] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:18:10,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:18:10,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:18:10,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824190760] [2024-06-21 17:18:10,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:18:10,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:18:10,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:18:10,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:18:10,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:18:10,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:18:10,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 64 transitions, 411 flow. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:18:10,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:18:10,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:18:10,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:18:11,378 INFO L124 PetriNetUnfolderBase]: 1407/2136 cut-off events. [2024-06-21 17:18:11,379 INFO L125 PetriNetUnfolderBase]: For 7168/7168 co-relation queries the response was YES. [2024-06-21 17:18:11,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7874 conditions, 2136 events. 1407/2136 cut-off events. For 7168/7168 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 9986 event pairs, 514 based on Foata normal form. 3/2130 useless extension candidates. Maximal degree in co-relation 7846. Up to 1973 conditions per place. [2024-06-21 17:18:11,388 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 59 selfloop transitions, 23 changer transitions 0/86 dead transitions. [2024-06-21 17:18:11,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 86 transitions, 633 flow [2024-06-21 17:18:11,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:18:11,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:18:11,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-21 17:18:11,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 17:18:11,390 INFO L175 Difference]: Start difference. First operand has 66 places, 64 transitions, 411 flow. Second operand 6 states and 108 transitions. [2024-06-21 17:18:11,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 86 transitions, 633 flow [2024-06-21 17:18:11,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 86 transitions, 600 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 17:18:11,397 INFO L231 Difference]: Finished difference. Result has 69 places, 64 transitions, 433 flow [2024-06-21 17:18:11,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=378, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=433, PETRI_PLACES=69, PETRI_TRANSITIONS=64} [2024-06-21 17:18:11,398 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 26 predicate places. [2024-06-21 17:18:11,398 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 64 transitions, 433 flow [2024-06-21 17:18:11,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:18:11,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:18:11,398 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:18:11,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 17:18:11,399 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:18:11,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:18:11,399 INFO L85 PathProgramCache]: Analyzing trace with hash -800977207, now seen corresponding path program 1 times [2024-06-21 17:18:11,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:18:11,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978840434] [2024-06-21 17:18:11,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:18:11,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:18:11,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:18:13,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:18:13,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:18:13,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978840434] [2024-06-21 17:18:13,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978840434] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:18:13,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:18:13,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:18:13,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427326868] [2024-06-21 17:18:13,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:18:13,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:18:13,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:18:13,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:18:13,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:18:13,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:18:13,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 64 transitions, 433 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:18:13,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:18:13,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:18:13,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:18:15,323 INFO L124 PetriNetUnfolderBase]: 2219/3312 cut-off events. [2024-06-21 17:18:15,323 INFO L125 PetriNetUnfolderBase]: For 12829/12832 co-relation queries the response was YES. [2024-06-21 17:18:15,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12390 conditions, 3312 events. 2219/3312 cut-off events. For 12829/12832 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 16042 event pairs, 572 based on Foata normal form. 22/3330 useless extension candidates. Maximal degree in co-relation 12361. Up to 2314 conditions per place. [2024-06-21 17:18:15,345 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 110 selfloop transitions, 57 changer transitions 0/171 dead transitions. [2024-06-21 17:18:15,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 171 transitions, 1314 flow [2024-06-21 17:18:15,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:18:15,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:18:15,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 215 transitions. [2024-06-21 17:18:15,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4653679653679654 [2024-06-21 17:18:15,347 INFO L175 Difference]: Start difference. First operand has 69 places, 64 transitions, 433 flow. Second operand 11 states and 215 transitions. [2024-06-21 17:18:15,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 171 transitions, 1314 flow [2024-06-21 17:18:15,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 171 transitions, 1179 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 17:18:15,360 INFO L231 Difference]: Finished difference. Result has 80 places, 102 transitions, 776 flow [2024-06-21 17:18:15,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=359, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=776, PETRI_PLACES=80, PETRI_TRANSITIONS=102} [2024-06-21 17:18:15,361 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 37 predicate places. [2024-06-21 17:18:15,361 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 102 transitions, 776 flow [2024-06-21 17:18:15,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:18:15,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:18:15,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:18:15,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 17:18:15,362 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:18:15,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:18:15,362 INFO L85 PathProgramCache]: Analyzing trace with hash 2114800909, now seen corresponding path program 2 times [2024-06-21 17:18:15,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:18:15,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4906345] [2024-06-21 17:18:15,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:18:15,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:18:15,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:18:17,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:18:17,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:18:17,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4906345] [2024-06-21 17:18:17,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4906345] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:18:17,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:18:17,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:18:17,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850280506] [2024-06-21 17:18:17,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:18:17,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:18:17,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:18:17,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:18:17,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:18:17,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:18:17,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 102 transitions, 776 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:18:17,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:18:17,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:18:17,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:18:19,395 INFO L124 PetriNetUnfolderBase]: 2651/3924 cut-off events. [2024-06-21 17:18:19,396 INFO L125 PetriNetUnfolderBase]: For 20880/20885 co-relation queries the response was YES. [2024-06-21 17:18:19,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17583 conditions, 3924 events. 2651/3924 cut-off events. For 20880/20885 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 19322 event pairs, 600 based on Foata normal form. 38/3958 useless extension candidates. Maximal degree in co-relation 17547. Up to 2554 conditions per place. [2024-06-21 17:18:19,422 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 90 selfloop transitions, 76 changer transitions 0/170 dead transitions. [2024-06-21 17:18:19,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 170 transitions, 1486 flow [2024-06-21 17:18:19,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:18:19,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:18:19,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-21 17:18:19,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-21 17:18:19,425 INFO L175 Difference]: Start difference. First operand has 80 places, 102 transitions, 776 flow. Second operand 9 states and 171 transitions. [2024-06-21 17:18:19,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 170 transitions, 1486 flow [2024-06-21 17:18:19,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 170 transitions, 1443 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-21 17:18:19,454 INFO L231 Difference]: Finished difference. Result has 89 places, 121 transitions, 1106 flow [2024-06-21 17:18:19,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=737, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1106, PETRI_PLACES=89, PETRI_TRANSITIONS=121} [2024-06-21 17:18:19,455 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 46 predicate places. [2024-06-21 17:18:19,455 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 121 transitions, 1106 flow [2024-06-21 17:18:19,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:18:19,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:18:19,456 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:18:19,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 17:18:19,456 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:18:19,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:18:19,457 INFO L85 PathProgramCache]: Analyzing trace with hash -260910903, now seen corresponding path program 3 times [2024-06-21 17:18:19,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:18:19,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011444444] [2024-06-21 17:18:19,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:18:19,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:18:19,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:18:21,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:18:21,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:18:21,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011444444] [2024-06-21 17:18:21,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011444444] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:18:21,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:18:21,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:18:21,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870603172] [2024-06-21 17:18:21,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:18:21,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:18:21,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:18:21,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:18:21,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:18:21,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:18:21,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 121 transitions, 1106 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:18:21,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:18:21,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:18:21,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:18:23,108 INFO L124 PetriNetUnfolderBase]: 2641/3906 cut-off events. [2024-06-21 17:18:23,109 INFO L125 PetriNetUnfolderBase]: For 27371/27373 co-relation queries the response was YES. [2024-06-21 17:18:23,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20041 conditions, 3906 events. 2641/3906 cut-off events. For 27371/27373 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 18977 event pairs, 677 based on Foata normal form. 4/3893 useless extension candidates. Maximal degree in co-relation 20001. Up to 3320 conditions per place. [2024-06-21 17:18:23,139 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 139 selfloop transitions, 55 changer transitions 0/198 dead transitions. [2024-06-21 17:18:23,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 198 transitions, 2138 flow [2024-06-21 17:18:23,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:18:23,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:18:23,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-21 17:18:23,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4421768707482993 [2024-06-21 17:18:23,141 INFO L175 Difference]: Start difference. First operand has 89 places, 121 transitions, 1106 flow. Second operand 7 states and 130 transitions. [2024-06-21 17:18:23,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 198 transitions, 2138 flow [2024-06-21 17:18:23,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 198 transitions, 1964 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-21 17:18:23,191 INFO L231 Difference]: Finished difference. Result has 94 places, 162 transitions, 1618 flow [2024-06-21 17:18:23,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=989, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1618, PETRI_PLACES=94, PETRI_TRANSITIONS=162} [2024-06-21 17:18:23,192 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 51 predicate places. [2024-06-21 17:18:23,192 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 162 transitions, 1618 flow [2024-06-21 17:18:23,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:18:23,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:18:23,192 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:18:23,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 17:18:23,193 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:18:23,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:18:23,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1147728213, now seen corresponding path program 4 times [2024-06-21 17:18:23,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:18:23,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245731393] [2024-06-21 17:18:23,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:18:23,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:18:23,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:18:25,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:18:25,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:18:25,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245731393] [2024-06-21 17:18:25,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245731393] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:18:25,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:18:25,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:18:25,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45890314] [2024-06-21 17:18:25,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:18:25,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:18:25,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:18:25,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:18:25,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:18:25,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:18:25,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 162 transitions, 1618 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:18:25,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:18:25,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:18:25,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:18:26,945 INFO L124 PetriNetUnfolderBase]: 2669/3950 cut-off events. [2024-06-21 17:18:26,945 INFO L125 PetriNetUnfolderBase]: For 32807/32809 co-relation queries the response was YES. [2024-06-21 17:18:26,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20915 conditions, 3950 events. 2669/3950 cut-off events. For 32807/32809 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 19323 event pairs, 706 based on Foata normal form. 18/3954 useless extension candidates. Maximal degree in co-relation 20871. Up to 3487 conditions per place. [2024-06-21 17:18:26,971 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 131 selfloop transitions, 72 changer transitions 0/207 dead transitions. [2024-06-21 17:18:26,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 207 transitions, 2294 flow [2024-06-21 17:18:26,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:18:26,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:18:26,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-21 17:18:26,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-21 17:18:26,973 INFO L175 Difference]: Start difference. First operand has 94 places, 162 transitions, 1618 flow. Second operand 8 states and 142 transitions. [2024-06-21 17:18:26,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 207 transitions, 2294 flow [2024-06-21 17:18:27,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 207 transitions, 2242 flow, removed 25 selfloop flow, removed 1 redundant places. [2024-06-21 17:18:27,035 INFO L231 Difference]: Finished difference. Result has 102 places, 174 transitions, 1885 flow [2024-06-21 17:18:27,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1576, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1885, PETRI_PLACES=102, PETRI_TRANSITIONS=174} [2024-06-21 17:18:27,037 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 59 predicate places. [2024-06-21 17:18:27,037 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 174 transitions, 1885 flow [2024-06-21 17:18:27,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:18:27,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:18:27,038 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:18:27,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 17:18:27,038 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:18:27,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:18:27,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1147482135, now seen corresponding path program 1 times [2024-06-21 17:18:27,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:18:27,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294388958] [2024-06-21 17:18:27,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:18:27,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:18:27,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:18:29,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:18:29,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:18:29,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294388958] [2024-06-21 17:18:29,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294388958] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:18:29,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:18:29,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:18:29,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650497732] [2024-06-21 17:18:29,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:18:29,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:18:29,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:18:29,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:18:29,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:18:29,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:18:29,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 174 transitions, 1885 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:18:29,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:18:29,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:18:29,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:18:31,119 INFO L124 PetriNetUnfolderBase]: 2661/3962 cut-off events. [2024-06-21 17:18:31,119 INFO L125 PetriNetUnfolderBase]: For 35055/35057 co-relation queries the response was YES. [2024-06-21 17:18:31,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21517 conditions, 3962 events. 2661/3962 cut-off events. For 35055/35057 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 19568 event pairs, 784 based on Foata normal form. 4/3963 useless extension candidates. Maximal degree in co-relation 21469. Up to 3825 conditions per place. [2024-06-21 17:18:31,146 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 185 selfloop transitions, 13 changer transitions 0/202 dead transitions. [2024-06-21 17:18:31,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 202 transitions, 2379 flow [2024-06-21 17:18:31,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:18:31,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:18:31,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-21 17:18:31,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-21 17:18:31,149 INFO L175 Difference]: Start difference. First operand has 102 places, 174 transitions, 1885 flow. Second operand 7 states and 116 transitions. [2024-06-21 17:18:31,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 202 transitions, 2379 flow [2024-06-21 17:18:31,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 202 transitions, 2217 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-21 17:18:31,217 INFO L231 Difference]: Finished difference. Result has 104 places, 176 transitions, 1778 flow [2024-06-21 17:18:31,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1723, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1778, PETRI_PLACES=104, PETRI_TRANSITIONS=176} [2024-06-21 17:18:31,218 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 61 predicate places. [2024-06-21 17:18:31,218 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 176 transitions, 1778 flow [2024-06-21 17:18:31,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:18:31,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:18:31,219 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:18:31,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 17:18:31,219 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:18:31,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:18:31,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1422109640, now seen corresponding path program 1 times [2024-06-21 17:18:31,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:18:31,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317902010] [2024-06-21 17:18:31,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:18:31,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:18:31,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:18:33,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:18:33,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:18:33,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317902010] [2024-06-21 17:18:33,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317902010] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:18:33,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:18:33,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:18:33,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845768274] [2024-06-21 17:18:33,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:18:33,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:18:33,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:18:33,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:18:33,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:18:33,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:18:33,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 176 transitions, 1778 flow. Second operand has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:18:33,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:18:33,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:18:33,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:18:34,771 INFO L124 PetriNetUnfolderBase]: 2853/4269 cut-off events. [2024-06-21 17:18:34,771 INFO L125 PetriNetUnfolderBase]: For 39122/39131 co-relation queries the response was YES. [2024-06-21 17:18:34,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22775 conditions, 4269 events. 2853/4269 cut-off events. For 39122/39131 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 21654 event pairs, 611 based on Foata normal form. 26/4291 useless extension candidates. Maximal degree in co-relation 22726. Up to 2695 conditions per place. [2024-06-21 17:18:34,797 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 108 selfloop transitions, 125 changer transitions 0/237 dead transitions. [2024-06-21 17:18:34,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 237 transitions, 2701 flow [2024-06-21 17:18:34,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:18:34,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:18:34,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-21 17:18:34,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-21 17:18:34,799 INFO L175 Difference]: Start difference. First operand has 104 places, 176 transitions, 1778 flow. Second operand 8 states and 152 transitions. [2024-06-21 17:18:34,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 237 transitions, 2701 flow [2024-06-21 17:18:34,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 237 transitions, 2666 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-21 17:18:34,868 INFO L231 Difference]: Finished difference. Result has 108 places, 197 transitions, 2299 flow [2024-06-21 17:18:34,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1743, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2299, PETRI_PLACES=108, PETRI_TRANSITIONS=197} [2024-06-21 17:18:34,869 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 65 predicate places. [2024-06-21 17:18:34,869 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 197 transitions, 2299 flow [2024-06-21 17:18:34,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:18:34,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:18:34,870 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:18:34,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 17:18:34,870 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:18:34,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:18:34,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1876005810, now seen corresponding path program 2 times [2024-06-21 17:18:34,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:18:34,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190671316] [2024-06-21 17:18:34,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:18:34,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:18:34,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:18:37,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:18:37,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:18:37,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190671316] [2024-06-21 17:18:37,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190671316] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:18:37,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:18:37,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:18:37,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055431100] [2024-06-21 17:18:37,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:18:37,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:18:37,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:18:37,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:18:37,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:18:37,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:18:37,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 197 transitions, 2299 flow. Second operand has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:18:37,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:18:37,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:18:37,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:18:38,622 INFO L124 PetriNetUnfolderBase]: 2813/4228 cut-off events. [2024-06-21 17:18:38,623 INFO L125 PetriNetUnfolderBase]: For 46019/46032 co-relation queries the response was YES. [2024-06-21 17:18:38,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24158 conditions, 4228 events. 2813/4228 cut-off events. For 46019/46032 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 21594 event pairs, 690 based on Foata normal form. 32/4256 useless extension candidates. Maximal degree in co-relation 24107. Up to 2673 conditions per place. [2024-06-21 17:18:38,647 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 115 selfloop transitions, 137 changer transitions 0/256 dead transitions. [2024-06-21 17:18:38,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 256 transitions, 3121 flow [2024-06-21 17:18:38,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:18:38,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:18:38,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-21 17:18:38,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47354497354497355 [2024-06-21 17:18:38,658 INFO L175 Difference]: Start difference. First operand has 108 places, 197 transitions, 2299 flow. Second operand 9 states and 179 transitions. [2024-06-21 17:18:38,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 256 transitions, 3121 flow [2024-06-21 17:18:38,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 256 transitions, 3001 flow, removed 37 selfloop flow, removed 3 redundant places. [2024-06-21 17:18:38,769 INFO L231 Difference]: Finished difference. Result has 116 places, 202 transitions, 2655 flow [2024-06-21 17:18:38,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2179, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2655, PETRI_PLACES=116, PETRI_TRANSITIONS=202} [2024-06-21 17:18:38,770 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 73 predicate places. [2024-06-21 17:18:38,770 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 202 transitions, 2655 flow [2024-06-21 17:18:38,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:18:38,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:18:38,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:18:38,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 17:18:38,771 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:18:38,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:18:38,772 INFO L85 PathProgramCache]: Analyzing trace with hash 501698214, now seen corresponding path program 3 times [2024-06-21 17:18:38,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:18:38,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293254441] [2024-06-21 17:18:38,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:18:38,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:18:38,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:18:41,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:18:41,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:18:41,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293254441] [2024-06-21 17:18:41,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293254441] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:18:41,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:18:41,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:18:41,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624003137] [2024-06-21 17:18:41,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:18:41,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:18:41,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:18:41,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:18:41,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:18:41,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:18:41,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 202 transitions, 2655 flow. Second operand has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:18:41,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:18:41,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:18:41,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:18:42,600 INFO L124 PetriNetUnfolderBase]: 2803/4202 cut-off events. [2024-06-21 17:18:42,600 INFO L125 PetriNetUnfolderBase]: For 51665/51687 co-relation queries the response was YES. [2024-06-21 17:18:42,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26162 conditions, 4202 events. 2803/4202 cut-off events. For 51665/51687 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 21147 event pairs, 712 based on Foata normal form. 13/4196 useless extension candidates. Maximal degree in co-relation 26107. Up to 3557 conditions per place. [2024-06-21 17:18:42,629 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 176 selfloop transitions, 53 changer transitions 0/233 dead transitions. [2024-06-21 17:18:42,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 233 transitions, 3248 flow [2024-06-21 17:18:42,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:18:42,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:18:42,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-21 17:18:42,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41836734693877553 [2024-06-21 17:18:42,631 INFO L175 Difference]: Start difference. First operand has 116 places, 202 transitions, 2655 flow. Second operand 7 states and 123 transitions. [2024-06-21 17:18:42,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 233 transitions, 3248 flow [2024-06-21 17:18:42,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 233 transitions, 2983 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-21 17:18:42,719 INFO L231 Difference]: Finished difference. Result has 117 places, 205 transitions, 2573 flow [2024-06-21 17:18:42,719 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2398, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2573, PETRI_PLACES=117, PETRI_TRANSITIONS=205} [2024-06-21 17:18:42,719 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 74 predicate places. [2024-06-21 17:18:42,719 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 205 transitions, 2573 flow [2024-06-21 17:18:42,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:18:42,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:18:42,720 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:18:42,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 17:18:42,720 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:18:42,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:18:42,721 INFO L85 PathProgramCache]: Analyzing trace with hash -239323868, now seen corresponding path program 1 times [2024-06-21 17:18:42,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:18:42,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013279683] [2024-06-21 17:18:42,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:18:42,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:18:42,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:18:45,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:18:45,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:18:45,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013279683] [2024-06-21 17:18:45,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013279683] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:18:45,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:18:45,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:18:45,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119157815] [2024-06-21 17:18:45,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:18:45,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:18:45,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:18:45,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:18:45,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:18:45,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:18:45,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 205 transitions, 2573 flow. Second operand has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:18:45,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:18:45,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:18:45,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:18:46,507 INFO L124 PetriNetUnfolderBase]: 2831/4247 cut-off events. [2024-06-21 17:18:46,508 INFO L125 PetriNetUnfolderBase]: For 53847/53856 co-relation queries the response was YES. [2024-06-21 17:18:46,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25926 conditions, 4247 events. 2831/4247 cut-off events. For 53847/53856 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 21687 event pairs, 571 based on Foata normal form. 12/4255 useless extension candidates. Maximal degree in co-relation 25870. Up to 3688 conditions per place. [2024-06-21 17:18:46,532 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 188 selfloop transitions, 50 changer transitions 0/242 dead transitions. [2024-06-21 17:18:46,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 242 transitions, 3285 flow [2024-06-21 17:18:46,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:18:46,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:18:46,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-21 17:18:46,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4387755102040816 [2024-06-21 17:18:46,536 INFO L175 Difference]: Start difference. First operand has 117 places, 205 transitions, 2573 flow. Second operand 7 states and 129 transitions. [2024-06-21 17:18:46,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 242 transitions, 3285 flow [2024-06-21 17:18:46,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 242 transitions, 3225 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-21 17:18:46,613 INFO L231 Difference]: Finished difference. Result has 121 places, 209 transitions, 2680 flow [2024-06-21 17:18:46,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2513, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2680, PETRI_PLACES=121, PETRI_TRANSITIONS=209} [2024-06-21 17:18:46,614 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 78 predicate places. [2024-06-21 17:18:46,614 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 209 transitions, 2680 flow [2024-06-21 17:18:46,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:18:46,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:18:46,615 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:18:46,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 17:18:46,615 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:18:46,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:18:46,616 INFO L85 PathProgramCache]: Analyzing trace with hash 685928818, now seen corresponding path program 2 times [2024-06-21 17:18:46,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:18:46,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742594234] [2024-06-21 17:18:46,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:18:46,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:18:46,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:18:48,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:18:48,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:18:48,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742594234] [2024-06-21 17:18:48,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742594234] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:18:48,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:18:48,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:18:48,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179424453] [2024-06-21 17:18:48,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:18:48,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:18:48,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:18:48,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:18:48,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:18:49,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:18:49,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 209 transitions, 2680 flow. Second operand has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:18:49,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:18:49,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:18:49,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:18:50,393 INFO L124 PetriNetUnfolderBase]: 2818/4221 cut-off events. [2024-06-21 17:18:50,394 INFO L125 PetriNetUnfolderBase]: For 58533/58538 co-relation queries the response was YES. [2024-06-21 17:18:50,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26007 conditions, 4221 events. 2818/4221 cut-off events. For 58533/58538 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 21343 event pairs, 746 based on Foata normal form. 8/4225 useless extension candidates. Maximal degree in co-relation 25949. Up to 3818 conditions per place. [2024-06-21 17:18:50,422 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 179 selfloop transitions, 57 changer transitions 0/240 dead transitions. [2024-06-21 17:18:50,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 240 transitions, 3267 flow [2024-06-21 17:18:50,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:18:50,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:18:50,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-21 17:18:50,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43197278911564624 [2024-06-21 17:18:50,424 INFO L175 Difference]: Start difference. First operand has 121 places, 209 transitions, 2680 flow. Second operand 7 states and 127 transitions. [2024-06-21 17:18:50,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 240 transitions, 3267 flow [2024-06-21 17:18:50,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 240 transitions, 3179 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-21 17:18:50,516 INFO L231 Difference]: Finished difference. Result has 125 places, 209 transitions, 2718 flow [2024-06-21 17:18:50,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2592, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2718, PETRI_PLACES=125, PETRI_TRANSITIONS=209} [2024-06-21 17:18:50,516 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 82 predicate places. [2024-06-21 17:18:50,516 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 209 transitions, 2718 flow [2024-06-21 17:18:50,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:18:50,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:18:50,517 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:18:50,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 17:18:50,517 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:18:50,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:18:50,517 INFO L85 PathProgramCache]: Analyzing trace with hash 804201196, now seen corresponding path program 1 times [2024-06-21 17:18:50,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:18:50,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470504528] [2024-06-21 17:18:50,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:18:50,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:18:50,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:18:53,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:18:53,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:18:53,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470504528] [2024-06-21 17:18:53,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470504528] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:18:53,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:18:53,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:18:53,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360493745] [2024-06-21 17:18:53,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:18:53,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:18:53,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:18:53,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:18:53,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:18:53,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:18:53,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 209 transitions, 2718 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:18:53,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:18:53,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:18:53,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:18:55,260 INFO L124 PetriNetUnfolderBase]: 3218/4879 cut-off events. [2024-06-21 17:18:55,260 INFO L125 PetriNetUnfolderBase]: For 80050/80055 co-relation queries the response was YES. [2024-06-21 17:18:55,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28763 conditions, 4879 events. 3218/4879 cut-off events. For 80050/80055 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 25854 event pairs, 698 based on Foata normal form. 94/4969 useless extension candidates. Maximal degree in co-relation 28703. Up to 2588 conditions per place. [2024-06-21 17:18:55,292 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 122 selfloop transitions, 143 changer transitions 0/269 dead transitions. [2024-06-21 17:18:55,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 269 transitions, 3555 flow [2024-06-21 17:18:55,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:18:55,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:18:55,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-21 17:18:55,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4595238095238095 [2024-06-21 17:18:55,294 INFO L175 Difference]: Start difference. First operand has 125 places, 209 transitions, 2718 flow. Second operand 10 states and 193 transitions. [2024-06-21 17:18:55,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 269 transitions, 3555 flow [2024-06-21 17:18:55,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 269 transitions, 3430 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 17:18:55,387 INFO L231 Difference]: Finished difference. Result has 129 places, 212 transitions, 2955 flow [2024-06-21 17:18:55,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2593, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2955, PETRI_PLACES=129, PETRI_TRANSITIONS=212} [2024-06-21 17:18:55,387 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 86 predicate places. [2024-06-21 17:18:55,387 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 212 transitions, 2955 flow [2024-06-21 17:18:55,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:18:55,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:18:55,387 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:18:55,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 17:18:55,388 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:18:55,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:18:55,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1618941750, now seen corresponding path program 2 times [2024-06-21 17:18:55,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:18:55,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591445014] [2024-06-21 17:18:55,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:18:55,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:18:55,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:18:58,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:18:58,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:18:58,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591445014] [2024-06-21 17:18:58,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591445014] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:18:58,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:18:58,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:18:58,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672778755] [2024-06-21 17:18:58,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:18:58,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:18:58,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:18:58,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:18:58,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:18:58,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:18:58,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 212 transitions, 2955 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:18:58,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:18:58,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:18:58,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:18:59,814 INFO L124 PetriNetUnfolderBase]: 3238/4905 cut-off events. [2024-06-21 17:18:59,814 INFO L125 PetriNetUnfolderBase]: For 75525/75527 co-relation queries the response was YES. [2024-06-21 17:18:59,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30472 conditions, 4905 events. 3238/4905 cut-off events. For 75525/75527 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 25805 event pairs, 850 based on Foata normal form. 4/4889 useless extension candidates. Maximal degree in co-relation 30411. Up to 4256 conditions per place. [2024-06-21 17:18:59,845 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 182 selfloop transitions, 64 changer transitions 0/250 dead transitions. [2024-06-21 17:18:59,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 250 transitions, 3597 flow [2024-06-21 17:18:59,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:18:59,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:18:59,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-21 17:18:59,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-21 17:18:59,847 INFO L175 Difference]: Start difference. First operand has 129 places, 212 transitions, 2955 flow. Second operand 8 states and 141 transitions. [2024-06-21 17:18:59,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 250 transitions, 3597 flow [2024-06-21 17:18:59,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 250 transitions, 3295 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-21 17:18:59,957 INFO L231 Difference]: Finished difference. Result has 129 places, 214 transitions, 2824 flow [2024-06-21 17:18:59,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2653, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2824, PETRI_PLACES=129, PETRI_TRANSITIONS=214} [2024-06-21 17:18:59,958 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 86 predicate places. [2024-06-21 17:18:59,958 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 214 transitions, 2824 flow [2024-06-21 17:18:59,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:18:59,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:18:59,958 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:18:59,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 17:18:59,958 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:18:59,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:18:59,959 INFO L85 PathProgramCache]: Analyzing trace with hash -771099924, now seen corresponding path program 3 times [2024-06-21 17:18:59,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:18:59,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510215727] [2024-06-21 17:18:59,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:18:59,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:18:59,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:19:03,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:19:03,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:19:03,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510215727] [2024-06-21 17:19:03,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510215727] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:19:03,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:19:03,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:19:03,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781809327] [2024-06-21 17:19:03,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:19:03,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:19:03,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:19:03,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:19:03,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:19:03,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:19:03,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 214 transitions, 2824 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:19:03,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:19:03,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:19:03,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:19:04,661 INFO L124 PetriNetUnfolderBase]: 3326/5061 cut-off events. [2024-06-21 17:19:04,661 INFO L125 PetriNetUnfolderBase]: For 80381/80383 co-relation queries the response was YES. [2024-06-21 17:19:04,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30563 conditions, 5061 events. 3326/5061 cut-off events. For 80381/80383 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 27008 event pairs, 891 based on Foata normal form. 18/5065 useless extension candidates. Maximal degree in co-relation 30501. Up to 4424 conditions per place. [2024-06-21 17:19:04,690 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 179 selfloop transitions, 77 changer transitions 0/260 dead transitions. [2024-06-21 17:19:04,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 260 transitions, 3577 flow [2024-06-21 17:19:04,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:19:04,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:19:04,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-21 17:19:04,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-21 17:19:04,692 INFO L175 Difference]: Start difference. First operand has 129 places, 214 transitions, 2824 flow. Second operand 9 states and 163 transitions. [2024-06-21 17:19:04,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 260 transitions, 3577 flow [2024-06-21 17:19:04,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 260 transitions, 3424 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-21 17:19:04,800 INFO L231 Difference]: Finished difference. Result has 132 places, 217 transitions, 2904 flow [2024-06-21 17:19:04,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2673, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2904, PETRI_PLACES=132, PETRI_TRANSITIONS=217} [2024-06-21 17:19:04,800 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 89 predicate places. [2024-06-21 17:19:04,800 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 217 transitions, 2904 flow [2024-06-21 17:19:04,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:19:04,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:19:04,801 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:19:04,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 17:19:04,801 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:19:04,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:19:04,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1076313064, now seen corresponding path program 4 times [2024-06-21 17:19:04,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:19:04,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713214512] [2024-06-21 17:19:04,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:19:04,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:19:04,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:19:07,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:19:07,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:19:07,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713214512] [2024-06-21 17:19:07,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713214512] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:19:07,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:19:07,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:19:07,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583492797] [2024-06-21 17:19:07,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:19:07,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:19:07,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:19:07,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:19:07,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:19:07,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:19:07,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 217 transitions, 2904 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:19:07,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:19:07,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:19:07,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:19:09,176 INFO L124 PetriNetUnfolderBase]: 3318/5041 cut-off events. [2024-06-21 17:19:09,176 INFO L125 PetriNetUnfolderBase]: For 82079/82081 co-relation queries the response was YES. [2024-06-21 17:19:09,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30778 conditions, 5041 events. 3318/5041 cut-off events. For 82079/82081 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 26678 event pairs, 827 based on Foata normal form. 4/5025 useless extension candidates. Maximal degree in co-relation 30715. Up to 4100 conditions per place. [2024-06-21 17:19:09,216 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 186 selfloop transitions, 71 changer transitions 0/261 dead transitions. [2024-06-21 17:19:09,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 261 transitions, 3625 flow [2024-06-21 17:19:09,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:19:09,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:19:09,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 17:19:09,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-21 17:19:09,217 INFO L175 Difference]: Start difference. First operand has 132 places, 217 transitions, 2904 flow. Second operand 8 states and 145 transitions. [2024-06-21 17:19:09,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 261 transitions, 3625 flow [2024-06-21 17:19:09,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 261 transitions, 3417 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-21 17:19:09,347 INFO L231 Difference]: Finished difference. Result has 134 places, 221 transitions, 2940 flow [2024-06-21 17:19:09,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2713, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2940, PETRI_PLACES=134, PETRI_TRANSITIONS=221} [2024-06-21 17:19:09,348 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 91 predicate places. [2024-06-21 17:19:09,348 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 221 transitions, 2940 flow [2024-06-21 17:19:09,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:19:09,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:19:09,348 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:19:09,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 17:19:09,348 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:19:09,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:19:09,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1530721381, now seen corresponding path program 1 times [2024-06-21 17:19:09,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:19:09,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266488623] [2024-06-21 17:19:09,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:19:09,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:19:09,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:19:11,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:19:11,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:19:11,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266488623] [2024-06-21 17:19:11,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266488623] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:19:11,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:19:11,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:19:11,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671821367] [2024-06-21 17:19:11,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:19:11,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:19:11,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:19:11,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:19:11,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:19:11,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:19:11,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 221 transitions, 2940 flow. Second operand has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:19:11,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:19:11,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:19:11,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:19:12,540 INFO L124 PetriNetUnfolderBase]: 3312/5049 cut-off events. [2024-06-21 17:19:12,541 INFO L125 PetriNetUnfolderBase]: For 84731/84733 co-relation queries the response was YES. [2024-06-21 17:19:12,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30895 conditions, 5049 events. 3312/5049 cut-off events. For 84731/84733 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 27112 event pairs, 1028 based on Foata normal form. 2/5048 useless extension candidates. Maximal degree in co-relation 30830. Up to 4918 conditions per place. [2024-06-21 17:19:12,573 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 221 selfloop transitions, 10 changer transitions 0/235 dead transitions. [2024-06-21 17:19:12,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 235 transitions, 3462 flow [2024-06-21 17:19:12,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 17:19:12,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 17:19:12,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 82 transitions. [2024-06-21 17:19:12,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3904761904761905 [2024-06-21 17:19:12,574 INFO L175 Difference]: Start difference. First operand has 134 places, 221 transitions, 2940 flow. Second operand 5 states and 82 transitions. [2024-06-21 17:19:12,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 235 transitions, 3462 flow [2024-06-21 17:19:12,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 235 transitions, 3307 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-21 17:19:12,691 INFO L231 Difference]: Finished difference. Result has 134 places, 224 transitions, 2845 flow [2024-06-21 17:19:12,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2785, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2845, PETRI_PLACES=134, PETRI_TRANSITIONS=224} [2024-06-21 17:19:12,692 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 91 predicate places. [2024-06-21 17:19:12,692 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 224 transitions, 2845 flow [2024-06-21 17:19:12,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:19:12,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:19:12,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:19:12,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 17:19:12,693 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:19:12,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:19:12,693 INFO L85 PathProgramCache]: Analyzing trace with hash -212915271, now seen corresponding path program 1 times [2024-06-21 17:19:12,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:19:12,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915593973] [2024-06-21 17:19:12,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:19:12,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:19:12,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:19:15,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:19:15,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:19:15,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915593973] [2024-06-21 17:19:15,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915593973] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:19:15,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:19:15,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:19:15,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416633970] [2024-06-21 17:19:15,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:19:15,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:19:15,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:19:15,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:19:15,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:19:15,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:19:15,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 224 transitions, 2845 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:19:15,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:19:15,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:19:15,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:19:17,328 INFO L124 PetriNetUnfolderBase]: 4507/6949 cut-off events. [2024-06-21 17:19:17,328 INFO L125 PetriNetUnfolderBase]: For 156556/156565 co-relation queries the response was YES. [2024-06-21 17:19:17,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41556 conditions, 6949 events. 4507/6949 cut-off events. For 156556/156565 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 40364 event pairs, 919 based on Foata normal form. 78/7023 useless extension candidates. Maximal degree in co-relation 41490. Up to 2587 conditions per place. [2024-06-21 17:19:17,369 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 179 selfloop transitions, 126 changer transitions 0/309 dead transitions. [2024-06-21 17:19:17,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 309 transitions, 4121 flow [2024-06-21 17:19:17,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:19:17,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:19:17,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 192 transitions. [2024-06-21 17:19:17,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5079365079365079 [2024-06-21 17:19:17,371 INFO L175 Difference]: Start difference. First operand has 134 places, 224 transitions, 2845 flow. Second operand 9 states and 192 transitions. [2024-06-21 17:19:17,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 309 transitions, 4121 flow [2024-06-21 17:19:17,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 309 transitions, 4083 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-21 17:19:17,518 INFO L231 Difference]: Finished difference. Result has 142 places, 234 transitions, 3341 flow [2024-06-21 17:19:17,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2807, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3341, PETRI_PLACES=142, PETRI_TRANSITIONS=234} [2024-06-21 17:19:17,518 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 99 predicate places. [2024-06-21 17:19:17,518 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 234 transitions, 3341 flow [2024-06-21 17:19:17,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:19:17,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:19:17,519 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:19:17,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 17:19:17,519 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:19:17,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:19:17,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1678834959, now seen corresponding path program 2 times [2024-06-21 17:19:17,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:19:17,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027931503] [2024-06-21 17:19:17,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:19:17,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:19:17,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:19:20,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:19:20,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:19:20,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027931503] [2024-06-21 17:19:20,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027931503] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:19:20,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:19:20,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:19:20,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228834720] [2024-06-21 17:19:20,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:19:20,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:19:20,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:19:20,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:19:20,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:19:20,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:19:20,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 234 transitions, 3341 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:19:20,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:19:20,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:19:20,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:19:22,397 INFO L124 PetriNetUnfolderBase]: 5183/8024 cut-off events. [2024-06-21 17:19:22,398 INFO L125 PetriNetUnfolderBase]: For 208070/208075 co-relation queries the response was YES. [2024-06-21 17:19:22,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49684 conditions, 8024 events. 5183/8024 cut-off events. For 208070/208075 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 48291 event pairs, 1487 based on Foata normal form. 74/8094 useless extension candidates. Maximal degree in co-relation 49615. Up to 4493 conditions per place. [2024-06-21 17:19:22,467 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 160 selfloop transitions, 146 changer transitions 0/310 dead transitions. [2024-06-21 17:19:22,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 310 transitions, 4484 flow [2024-06-21 17:19:22,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:19:22,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:19:22,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 204 transitions. [2024-06-21 17:19:22,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4857142857142857 [2024-06-21 17:19:22,469 INFO L175 Difference]: Start difference. First operand has 142 places, 234 transitions, 3341 flow. Second operand 10 states and 204 transitions. [2024-06-21 17:19:22,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 310 transitions, 4484 flow [2024-06-21 17:19:22,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 310 transitions, 4266 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-21 17:19:22,802 INFO L231 Difference]: Finished difference. Result has 149 places, 241 transitions, 3619 flow [2024-06-21 17:19:22,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3127, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3619, PETRI_PLACES=149, PETRI_TRANSITIONS=241} [2024-06-21 17:19:22,803 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 106 predicate places. [2024-06-21 17:19:22,803 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 241 transitions, 3619 flow [2024-06-21 17:19:22,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:19:22,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:19:22,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:19:22,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 17:19:22,804 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:19:22,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:19:22,804 INFO L85 PathProgramCache]: Analyzing trace with hash 2004052571, now seen corresponding path program 3 times [2024-06-21 17:19:22,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:19:22,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521245434] [2024-06-21 17:19:22,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:19:22,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:19:22,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:19:25,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:19:25,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:19:25,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521245434] [2024-06-21 17:19:25,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521245434] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:19:25,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:19:25,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:19:25,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268237525] [2024-06-21 17:19:25,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:19:25,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:19:25,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:19:25,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:19:25,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:19:25,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:19:25,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 241 transitions, 3619 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:19:25,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:19:25,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:19:25,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:19:27,832 INFO L124 PetriNetUnfolderBase]: 5792/9076 cut-off events. [2024-06-21 17:19:27,832 INFO L125 PetriNetUnfolderBase]: For 247759/247772 co-relation queries the response was YES. [2024-06-21 17:19:27,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56622 conditions, 9076 events. 5792/9076 cut-off events. For 247759/247772 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 57230 event pairs, 1642 based on Foata normal form. 76/9148 useless extension candidates. Maximal degree in co-relation 56550. Up to 5897 conditions per place. [2024-06-21 17:19:27,898 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 174 selfloop transitions, 144 changer transitions 0/322 dead transitions. [2024-06-21 17:19:27,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 322 transitions, 4846 flow [2024-06-21 17:19:27,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:19:27,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:19:27,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 208 transitions. [2024-06-21 17:19:27,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49523809523809526 [2024-06-21 17:19:27,899 INFO L175 Difference]: Start difference. First operand has 149 places, 241 transitions, 3619 flow. Second operand 10 states and 208 transitions. [2024-06-21 17:19:27,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 322 transitions, 4846 flow [2024-06-21 17:19:28,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 322 transitions, 4514 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-06-21 17:19:28,245 INFO L231 Difference]: Finished difference. Result has 153 places, 247 transitions, 3740 flow [2024-06-21 17:19:28,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3287, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3740, PETRI_PLACES=153, PETRI_TRANSITIONS=247} [2024-06-21 17:19:28,246 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 110 predicate places. [2024-06-21 17:19:28,246 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 247 transitions, 3740 flow [2024-06-21 17:19:28,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:19:28,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:19:28,246 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:19:28,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 17:19:28,247 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:19:28,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:19:28,247 INFO L85 PathProgramCache]: Analyzing trace with hash -839780287, now seen corresponding path program 4 times [2024-06-21 17:19:28,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:19:28,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368770432] [2024-06-21 17:19:28,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:19:28,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:19:28,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:19:30,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:19:30,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:19:30,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368770432] [2024-06-21 17:19:30,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368770432] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:19:30,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:19:30,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:19:30,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673732585] [2024-06-21 17:19:30,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:19:30,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:19:30,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:19:30,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:19:30,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:19:30,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:19:30,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 247 transitions, 3740 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:19:30,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:19:30,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:19:30,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:19:33,021 INFO L124 PetriNetUnfolderBase]: 6104/9589 cut-off events. [2024-06-21 17:19:33,021 INFO L125 PetriNetUnfolderBase]: For 264434/264443 co-relation queries the response was YES. [2024-06-21 17:19:33,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58809 conditions, 9589 events. 6104/9589 cut-off events. For 264434/264443 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 61409 event pairs, 2125 based on Foata normal form. 80/9665 useless extension candidates. Maximal degree in co-relation 58735. Up to 7436 conditions per place. [2024-06-21 17:19:33,101 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 163 selfloop transitions, 131 changer transitions 0/298 dead transitions. [2024-06-21 17:19:33,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 298 transitions, 4590 flow [2024-06-21 17:19:33,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:19:33,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:19:33,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-21 17:19:33,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455026455026455 [2024-06-21 17:19:33,102 INFO L175 Difference]: Start difference. First operand has 153 places, 247 transitions, 3740 flow. Second operand 9 states and 172 transitions. [2024-06-21 17:19:33,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 298 transitions, 4590 flow [2024-06-21 17:19:33,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 298 transitions, 4352 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-21 17:19:33,580 INFO L231 Difference]: Finished difference. Result has 156 places, 249 transitions, 3840 flow [2024-06-21 17:19:33,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3504, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3840, PETRI_PLACES=156, PETRI_TRANSITIONS=249} [2024-06-21 17:19:33,581 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 113 predicate places. [2024-06-21 17:19:33,581 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 249 transitions, 3840 flow [2024-06-21 17:19:33,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:19:33,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:19:33,581 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:19:33,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 17:19:33,582 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:19:33,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:19:33,582 INFO L85 PathProgramCache]: Analyzing trace with hash 2004056291, now seen corresponding path program 5 times [2024-06-21 17:19:33,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:19:33,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452759446] [2024-06-21 17:19:33,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:19:33,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:19:33,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:19:36,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:19:36,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:19:36,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452759446] [2024-06-21 17:19:36,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452759446] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:19:36,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:19:36,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:19:36,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063248798] [2024-06-21 17:19:36,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:19:36,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:19:36,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:19:36,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:19:36,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:19:36,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:19:36,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 249 transitions, 3840 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:19:36,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:19:36,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:19:36,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:19:38,855 INFO L124 PetriNetUnfolderBase]: 6233/9831 cut-off events. [2024-06-21 17:19:38,855 INFO L125 PetriNetUnfolderBase]: For 267871/267884 co-relation queries the response was YES. [2024-06-21 17:19:38,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59414 conditions, 9831 events. 6233/9831 cut-off events. For 267871/267884 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 63753 event pairs, 2316 based on Foata normal form. 86/9913 useless extension candidates. Maximal degree in co-relation 59338. Up to 7667 conditions per place. [2024-06-21 17:19:38,935 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 172 selfloop transitions, 141 changer transitions 0/317 dead transitions. [2024-06-21 17:19:38,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 317 transitions, 4855 flow [2024-06-21 17:19:38,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:19:38,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:19:38,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 201 transitions. [2024-06-21 17:19:38,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4785714285714286 [2024-06-21 17:19:38,937 INFO L175 Difference]: Start difference. First operand has 156 places, 249 transitions, 3840 flow. Second operand 10 states and 201 transitions. [2024-06-21 17:19:38,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 317 transitions, 4855 flow [2024-06-21 17:19:39,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 317 transitions, 4567 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-21 17:19:39,353 INFO L231 Difference]: Finished difference. Result has 159 places, 251 transitions, 3912 flow [2024-06-21 17:19:39,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3552, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3912, PETRI_PLACES=159, PETRI_TRANSITIONS=251} [2024-06-21 17:19:39,354 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 116 predicate places. [2024-06-21 17:19:39,354 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 251 transitions, 3912 flow [2024-06-21 17:19:39,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:19:39,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:19:39,355 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:19:39,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 17:19:39,355 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:19:39,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:19:39,356 INFO L85 PathProgramCache]: Analyzing trace with hash -839565085, now seen corresponding path program 1 times [2024-06-21 17:19:39,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:19:39,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910628281] [2024-06-21 17:19:39,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:19:39,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:19:39,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:19:42,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:19:42,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:19:42,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910628281] [2024-06-21 17:19:42,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910628281] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:19:42,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:19:42,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:19:42,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596204127] [2024-06-21 17:19:42,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:19:42,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:19:42,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:19:42,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:19:42,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:19:42,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:19:42,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 251 transitions, 3912 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:19:42,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:19:42,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:19:42,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:19:45,116 INFO L124 PetriNetUnfolderBase]: 6344/10059 cut-off events. [2024-06-21 17:19:45,116 INFO L125 PetriNetUnfolderBase]: For 268573/268582 co-relation queries the response was YES. [2024-06-21 17:19:45,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59784 conditions, 10059 events. 6344/10059 cut-off events. For 268573/268582 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 65816 event pairs, 2068 based on Foata normal form. 60/10115 useless extension candidates. Maximal degree in co-relation 59707. Up to 5962 conditions per place. [2024-06-21 17:19:45,222 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 165 selfloop transitions, 137 changer transitions 0/306 dead transitions. [2024-06-21 17:19:45,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 306 transitions, 4782 flow [2024-06-21 17:19:45,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:19:45,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:19:45,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-21 17:19:45,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4656084656084656 [2024-06-21 17:19:45,223 INFO L175 Difference]: Start difference. First operand has 159 places, 251 transitions, 3912 flow. Second operand 9 states and 176 transitions. [2024-06-21 17:19:45,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 306 transitions, 4782 flow [2024-06-21 17:19:45,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 306 transitions, 4470 flow, removed 21 selfloop flow, removed 8 redundant places. [2024-06-21 17:19:45,722 INFO L231 Difference]: Finished difference. Result has 160 places, 252 transitions, 3920 flow [2024-06-21 17:19:45,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3600, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3920, PETRI_PLACES=160, PETRI_TRANSITIONS=252} [2024-06-21 17:19:45,723 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 117 predicate places. [2024-06-21 17:19:45,724 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 252 transitions, 3920 flow [2024-06-21 17:19:45,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:19:45,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:19:45,724 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:19:45,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 17:19:45,724 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:19:45,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:19:45,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1095699205, now seen corresponding path program 6 times [2024-06-21 17:19:45,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:19:45,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194022410] [2024-06-21 17:19:45,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:19:45,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:19:45,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:19:48,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:19:48,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:19:48,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194022410] [2024-06-21 17:19:48,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194022410] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:19:48,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:19:48,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:19:48,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324985401] [2024-06-21 17:19:48,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:19:48,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:19:48,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:19:48,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:19:48,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:19:48,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:19:48,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 252 transitions, 3920 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:19:48,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:19:48,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:19:48,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:19:50,669 INFO L124 PetriNetUnfolderBase]: 6376/10140 cut-off events. [2024-06-21 17:19:50,669 INFO L125 PetriNetUnfolderBase]: For 261647/261669 co-relation queries the response was YES. [2024-06-21 17:19:50,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60044 conditions, 10140 events. 6376/10140 cut-off events. For 261647/261669 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 66669 event pairs, 2655 based on Foata normal form. 29/10150 useless extension candidates. Maximal degree in co-relation 59966. Up to 9260 conditions per place. [2024-06-21 17:19:50,752 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 233 selfloop transitions, 54 changer transitions 0/291 dead transitions. [2024-06-21 17:19:50,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 291 transitions, 4642 flow [2024-06-21 17:19:50,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:19:50,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:19:50,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-21 17:19:50,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-21 17:19:50,753 INFO L175 Difference]: Start difference. First operand has 160 places, 252 transitions, 3920 flow. Second operand 8 states and 141 transitions. [2024-06-21 17:19:50,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 291 transitions, 4642 flow [2024-06-21 17:19:51,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 291 transitions, 4266 flow, removed 23 selfloop flow, removed 8 redundant places. [2024-06-21 17:19:51,216 INFO L231 Difference]: Finished difference. Result has 160 places, 253 transitions, 3683 flow [2024-06-21 17:19:51,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3544, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3683, PETRI_PLACES=160, PETRI_TRANSITIONS=253} [2024-06-21 17:19:51,217 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 117 predicate places. [2024-06-21 17:19:51,217 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 253 transitions, 3683 flow [2024-06-21 17:19:51,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:19:51,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:19:51,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:19:51,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 17:19:51,218 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:19:51,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:19:51,218 INFO L85 PathProgramCache]: Analyzing trace with hash 1103064247, now seen corresponding path program 2 times [2024-06-21 17:19:51,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:19:51,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289064228] [2024-06-21 17:19:51,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:19:51,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:19:51,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:19:54,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:19:54,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:19:54,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289064228] [2024-06-21 17:19:54,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289064228] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:19:54,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:19:54,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:19:54,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975126831] [2024-06-21 17:19:54,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:19:54,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:19:54,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:19:54,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:19:54,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:19:54,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:19:54,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 253 transitions, 3683 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:19:54,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:19:54,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:19:54,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:19:56,869 INFO L124 PetriNetUnfolderBase]: 6424/10236 cut-off events. [2024-06-21 17:19:56,869 INFO L125 PetriNetUnfolderBase]: For 266688/266710 co-relation queries the response was YES. [2024-06-21 17:19:56,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59248 conditions, 10236 events. 6424/10236 cut-off events. For 266688/266710 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 67629 event pairs, 2655 based on Foata normal form. 21/10238 useless extension candidates. Maximal degree in co-relation 59170. Up to 9238 conditions per place. [2024-06-21 17:19:56,958 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 234 selfloop transitions, 56 changer transitions 0/294 dead transitions. [2024-06-21 17:19:56,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 294 transitions, 4423 flow [2024-06-21 17:19:56,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:19:56,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:19:56,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-21 17:19:56,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-21 17:19:56,960 INFO L175 Difference]: Start difference. First operand has 160 places, 253 transitions, 3683 flow. Second operand 8 states and 143 transitions. [2024-06-21 17:19:56,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 294 transitions, 4423 flow [2024-06-21 17:19:57,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 294 transitions, 4302 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-21 17:19:57,462 INFO L231 Difference]: Finished difference. Result has 162 places, 254 transitions, 3706 flow [2024-06-21 17:19:57,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3562, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3706, PETRI_PLACES=162, PETRI_TRANSITIONS=254} [2024-06-21 17:19:57,463 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 119 predicate places. [2024-06-21 17:19:57,463 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 254 transitions, 3706 flow [2024-06-21 17:19:57,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:19:57,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:19:57,463 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:19:57,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 17:19:57,464 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:19:57,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:19:57,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1361611687, now seen corresponding path program 3 times [2024-06-21 17:19:57,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:19:57,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580155711] [2024-06-21 17:19:57,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:19:57,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:19:57,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:20:00,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:20:00,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:20:00,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580155711] [2024-06-21 17:20:00,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580155711] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:20:00,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:20:00,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:20:00,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255012085] [2024-06-21 17:20:00,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:20:00,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:20:00,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:20:00,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:20:00,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:20:00,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:20:00,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 254 transitions, 3706 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:00,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:20:00,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:20:00,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:20:02,727 INFO L124 PetriNetUnfolderBase]: 6404/10204 cut-off events. [2024-06-21 17:20:02,728 INFO L125 PetriNetUnfolderBase]: For 274070/274092 co-relation queries the response was YES. [2024-06-21 17:20:02,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59097 conditions, 10204 events. 6404/10204 cut-off events. For 274070/274092 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 67040 event pairs, 2596 based on Foata normal form. 21/10206 useless extension candidates. Maximal degree in co-relation 59018. Up to 8414 conditions per place. [2024-06-21 17:20:02,820 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 225 selfloop transitions, 64 changer transitions 0/293 dead transitions. [2024-06-21 17:20:02,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 293 transitions, 4358 flow [2024-06-21 17:20:02,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:20:02,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:20:02,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-21 17:20:02,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-21 17:20:02,822 INFO L175 Difference]: Start difference. First operand has 162 places, 254 transitions, 3706 flow. Second operand 8 states and 141 transitions. [2024-06-21 17:20:02,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 293 transitions, 4358 flow [2024-06-21 17:20:03,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 293 transitions, 4228 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-21 17:20:03,334 INFO L231 Difference]: Finished difference. Result has 163 places, 253 transitions, 3646 flow [2024-06-21 17:20:03,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3514, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3646, PETRI_PLACES=163, PETRI_TRANSITIONS=253} [2024-06-21 17:20:03,334 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 120 predicate places. [2024-06-21 17:20:03,335 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 253 transitions, 3646 flow [2024-06-21 17:20:03,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:03,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:20:03,335 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:20:03,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 17:20:03,335 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:20:03,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:20:03,335 INFO L85 PathProgramCache]: Analyzing trace with hash -342734822, now seen corresponding path program 1 times [2024-06-21 17:20:03,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:20:03,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462355295] [2024-06-21 17:20:03,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:20:03,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:20:03,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:20:06,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:20:06,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:20:06,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462355295] [2024-06-21 17:20:06,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462355295] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:20:06,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:20:06,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:20:06,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023377071] [2024-06-21 17:20:06,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:20:06,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:20:06,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:20:06,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:20:06,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:20:06,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:20:06,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 253 transitions, 3646 flow. Second operand has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:06,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:20:06,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:20:06,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:20:08,479 INFO L124 PetriNetUnfolderBase]: 6413/10219 cut-off events. [2024-06-21 17:20:08,480 INFO L125 PetriNetUnfolderBase]: For 282454/282458 co-relation queries the response was YES. [2024-06-21 17:20:08,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59578 conditions, 10219 events. 6413/10219 cut-off events. For 282454/282458 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 67644 event pairs, 2799 based on Foata normal form. 8/10224 useless extension candidates. Maximal degree in co-relation 59498. Up to 9950 conditions per place. [2024-06-21 17:20:08,584 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 255 selfloop transitions, 23 changer transitions 0/282 dead transitions. [2024-06-21 17:20:08,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 282 transitions, 4368 flow [2024-06-21 17:20:08,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:20:08,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:20:08,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-21 17:20:08,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-21 17:20:08,586 INFO L175 Difference]: Start difference. First operand has 163 places, 253 transitions, 3646 flow. Second operand 7 states and 112 transitions. [2024-06-21 17:20:08,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 282 transitions, 4368 flow [2024-06-21 17:20:09,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 282 transitions, 4223 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-21 17:20:09,202 INFO L231 Difference]: Finished difference. Result has 165 places, 260 transitions, 3668 flow [2024-06-21 17:20:09,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3503, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3668, PETRI_PLACES=165, PETRI_TRANSITIONS=260} [2024-06-21 17:20:09,203 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 122 predicate places. [2024-06-21 17:20:09,203 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 260 transitions, 3668 flow [2024-06-21 17:20:09,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:09,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:20:09,204 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:20:09,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 17:20:09,204 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:20:09,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:20:09,205 INFO L85 PathProgramCache]: Analyzing trace with hash -540444232, now seen corresponding path program 2 times [2024-06-21 17:20:09,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:20:09,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425287538] [2024-06-21 17:20:09,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:20:09,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:20:09,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:20:11,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:20:11,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:20:11,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425287538] [2024-06-21 17:20:11,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425287538] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:20:11,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:20:11,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:20:11,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155426899] [2024-06-21 17:20:11,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:20:11,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:20:11,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:20:11,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:20:11,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:20:11,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:20:11,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 260 transitions, 3668 flow. Second operand has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:11,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:20:11,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:20:11,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:20:14,100 INFO L124 PetriNetUnfolderBase]: 6407/10227 cut-off events. [2024-06-21 17:20:14,100 INFO L125 PetriNetUnfolderBase]: For 290949/290967 co-relation queries the response was YES. [2024-06-21 17:20:14,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59410 conditions, 10227 events. 6407/10227 cut-off events. For 290949/290967 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 67889 event pairs, 2759 based on Foata normal form. 14/10234 useless extension candidates. Maximal degree in co-relation 59329. Up to 9919 conditions per place. [2024-06-21 17:20:14,169 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 246 selfloop transitions, 29 changer transitions 0/279 dead transitions. [2024-06-21 17:20:14,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 279 transitions, 4384 flow [2024-06-21 17:20:14,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:20:14,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:20:14,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 96 transitions. [2024-06-21 17:20:14,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-21 17:20:14,170 INFO L175 Difference]: Start difference. First operand has 165 places, 260 transitions, 3668 flow. Second operand 6 states and 96 transitions. [2024-06-21 17:20:14,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 279 transitions, 4384 flow [2024-06-21 17:20:14,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 279 transitions, 4305 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-21 17:20:14,639 INFO L231 Difference]: Finished difference. Result has 167 places, 263 transitions, 3709 flow [2024-06-21 17:20:14,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3589, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3709, PETRI_PLACES=167, PETRI_TRANSITIONS=263} [2024-06-21 17:20:14,639 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 124 predicate places. [2024-06-21 17:20:14,639 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 263 transitions, 3709 flow [2024-06-21 17:20:14,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:14,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:20:14,640 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:20:14,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 17:20:14,640 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:20:14,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:20:14,640 INFO L85 PathProgramCache]: Analyzing trace with hash -540859942, now seen corresponding path program 3 times [2024-06-21 17:20:14,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:20:14,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229908459] [2024-06-21 17:20:14,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:20:14,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:20:14,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:20:17,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:20:17,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:20:17,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229908459] [2024-06-21 17:20:17,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229908459] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:20:17,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:20:17,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:20:17,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519202772] [2024-06-21 17:20:17,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:20:17,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:20:17,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:20:17,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:20:17,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:20:17,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:20:17,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 263 transitions, 3709 flow. Second operand has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:17,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:20:17,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:20:17,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:20:19,489 INFO L124 PetriNetUnfolderBase]: 6401/10215 cut-off events. [2024-06-21 17:20:19,489 INFO L125 PetriNetUnfolderBase]: For 304014/304020 co-relation queries the response was YES. [2024-06-21 17:20:19,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60242 conditions, 10215 events. 6401/10215 cut-off events. For 304014/304020 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 67786 event pairs, 2789 based on Foata normal form. 8/10220 useless extension candidates. Maximal degree in co-relation 60160. Up to 9928 conditions per place. [2024-06-21 17:20:19,567 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 255 selfloop transitions, 25 changer transitions 0/284 dead transitions. [2024-06-21 17:20:19,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 284 transitions, 4337 flow [2024-06-21 17:20:19,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:20:19,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:20:19,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-21 17:20:19,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4007936507936508 [2024-06-21 17:20:19,568 INFO L175 Difference]: Start difference. First operand has 167 places, 263 transitions, 3709 flow. Second operand 6 states and 101 transitions. [2024-06-21 17:20:19,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 284 transitions, 4337 flow [2024-06-21 17:20:20,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 284 transitions, 4147 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-21 17:20:20,027 INFO L231 Difference]: Finished difference. Result has 168 places, 263 transitions, 3582 flow [2024-06-21 17:20:20,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3519, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3582, PETRI_PLACES=168, PETRI_TRANSITIONS=263} [2024-06-21 17:20:20,027 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 125 predicate places. [2024-06-21 17:20:20,027 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 263 transitions, 3582 flow [2024-06-21 17:20:20,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:20,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:20:20,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:20:20,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 17:20:20,028 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:20:20,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:20:20,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1883575252, now seen corresponding path program 1 times [2024-06-21 17:20:20,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:20:20,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660151700] [2024-06-21 17:20:20,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:20:20,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:20:20,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:20:22,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:20:22,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:20:22,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660151700] [2024-06-21 17:20:22,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660151700] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:20:22,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:20:22,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:20:22,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079124522] [2024-06-21 17:20:22,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:20:22,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:20:22,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:20:22,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:20:22,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:20:22,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:20:22,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 263 transitions, 3582 flow. Second operand has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:22,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:20:22,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:20:22,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:20:24,601 INFO L124 PetriNetUnfolderBase]: 6443/10288 cut-off events. [2024-06-21 17:20:24,601 INFO L125 PetriNetUnfolderBase]: For 320772/320774 co-relation queries the response was YES. [2024-06-21 17:20:24,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60512 conditions, 10288 events. 6443/10288 cut-off events. For 320772/320774 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 68294 event pairs, 2797 based on Foata normal form. 2/10287 useless extension candidates. Maximal degree in co-relation 60431. Up to 9909 conditions per place. [2024-06-21 17:20:24,705 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 271 selfloop transitions, 27 changer transitions 0/302 dead transitions. [2024-06-21 17:20:24,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 302 transitions, 4562 flow [2024-06-21 17:20:24,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:20:24,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:20:24,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-21 17:20:24,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217687074829932 [2024-06-21 17:20:24,707 INFO L175 Difference]: Start difference. First operand has 168 places, 263 transitions, 3582 flow. Second operand 7 states and 124 transitions. [2024-06-21 17:20:24,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 302 transitions, 4562 flow [2024-06-21 17:20:25,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 302 transitions, 4354 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-21 17:20:25,324 INFO L231 Difference]: Finished difference. Result has 169 places, 274 transitions, 3627 flow [2024-06-21 17:20:25,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3378, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3627, PETRI_PLACES=169, PETRI_TRANSITIONS=274} [2024-06-21 17:20:25,324 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 126 predicate places. [2024-06-21 17:20:25,324 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 274 transitions, 3627 flow [2024-06-21 17:20:25,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:25,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:20:25,325 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:20:25,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 17:20:25,325 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:20:25,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:20:25,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1883695408, now seen corresponding path program 1 times [2024-06-21 17:20:25,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:20:25,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523136286] [2024-06-21 17:20:25,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:20:25,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:20:25,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:20:27,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:20:27,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:20:27,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523136286] [2024-06-21 17:20:27,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523136286] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:20:27,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:20:27,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:20:27,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108299941] [2024-06-21 17:20:27,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:20:27,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:20:27,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:20:27,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:20:27,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:20:27,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:20:27,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 274 transitions, 3627 flow. Second operand has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:27,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:20:27,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:20:27,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:20:30,030 INFO L124 PetriNetUnfolderBase]: 6534/10417 cut-off events. [2024-06-21 17:20:30,031 INFO L125 PetriNetUnfolderBase]: For 326574/326576 co-relation queries the response was YES. [2024-06-21 17:20:30,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62460 conditions, 10417 events. 6534/10417 cut-off events. For 326574/326576 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 69220 event pairs, 2863 based on Foata normal form. 6/10420 useless extension candidates. Maximal degree in co-relation 62377. Up to 10088 conditions per place. [2024-06-21 17:20:30,134 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 279 selfloop transitions, 24 changer transitions 0/307 dead transitions. [2024-06-21 17:20:30,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 307 transitions, 4533 flow [2024-06-21 17:20:30,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:20:30,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:20:30,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-21 17:20:30,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37202380952380953 [2024-06-21 17:20:30,135 INFO L175 Difference]: Start difference. First operand has 169 places, 274 transitions, 3627 flow. Second operand 8 states and 125 transitions. [2024-06-21 17:20:30,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 307 transitions, 4533 flow [2024-06-21 17:20:30,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 307 transitions, 4427 flow, removed 48 selfloop flow, removed 2 redundant places. [2024-06-21 17:20:30,738 INFO L231 Difference]: Finished difference. Result has 176 places, 285 transitions, 3769 flow [2024-06-21 17:20:30,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3543, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3769, PETRI_PLACES=176, PETRI_TRANSITIONS=285} [2024-06-21 17:20:30,739 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 133 predicate places. [2024-06-21 17:20:30,739 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 285 transitions, 3769 flow [2024-06-21 17:20:30,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:30,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:20:30,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:20:30,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 17:20:30,739 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:20:30,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:20:30,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1973206850, now seen corresponding path program 2 times [2024-06-21 17:20:30,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:20:30,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703150541] [2024-06-21 17:20:30,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:20:30,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:20:30,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:20:33,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:20:33,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:20:33,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703150541] [2024-06-21 17:20:33,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703150541] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:20:33,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:20:33,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:20:33,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176132748] [2024-06-21 17:20:33,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:20:33,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:20:33,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:20:33,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:20:33,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:20:33,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:20:33,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 285 transitions, 3769 flow. Second operand has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:33,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:20:33,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:20:33,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:20:35,531 INFO L124 PetriNetUnfolderBase]: 6508/10381 cut-off events. [2024-06-21 17:20:35,531 INFO L125 PetriNetUnfolderBase]: For 338451/338453 co-relation queries the response was YES. [2024-06-21 17:20:35,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62432 conditions, 10381 events. 6508/10381 cut-off events. For 338451/338453 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 68929 event pairs, 2862 based on Foata normal form. 6/10384 useless extension candidates. Maximal degree in co-relation 62346. Up to 10069 conditions per place. [2024-06-21 17:20:35,630 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 278 selfloop transitions, 24 changer transitions 0/306 dead transitions. [2024-06-21 17:20:35,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 306 transitions, 4431 flow [2024-06-21 17:20:35,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:20:35,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:20:35,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-21 17:20:35,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36904761904761907 [2024-06-21 17:20:35,631 INFO L175 Difference]: Start difference. First operand has 176 places, 285 transitions, 3769 flow. Second operand 8 states and 124 transitions. [2024-06-21 17:20:35,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 306 transitions, 4431 flow [2024-06-21 17:20:36,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 306 transitions, 4321 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-21 17:20:36,204 INFO L231 Difference]: Finished difference. Result has 180 places, 285 transitions, 3715 flow [2024-06-21 17:20:36,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3659, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3715, PETRI_PLACES=180, PETRI_TRANSITIONS=285} [2024-06-21 17:20:36,204 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 137 predicate places. [2024-06-21 17:20:36,204 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 285 transitions, 3715 flow [2024-06-21 17:20:36,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:36,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:20:36,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:20:36,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 17:20:36,205 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:20:36,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:20:36,205 INFO L85 PathProgramCache]: Analyzing trace with hash -540438280, now seen corresponding path program 2 times [2024-06-21 17:20:36,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:20:36,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165894360] [2024-06-21 17:20:36,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:20:36,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:20:36,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:20:38,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:20:38,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:20:38,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165894360] [2024-06-21 17:20:38,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165894360] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:20:38,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:20:38,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:20:38,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594238880] [2024-06-21 17:20:38,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:20:38,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:20:38,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:20:38,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:20:38,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:20:38,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:20:38,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 285 transitions, 3715 flow. Second operand has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:38,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:20:38,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:20:38,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:20:40,787 INFO L124 PetriNetUnfolderBase]: 6550/10438 cut-off events. [2024-06-21 17:20:40,787 INFO L125 PetriNetUnfolderBase]: For 353458/353463 co-relation queries the response was YES. [2024-06-21 17:20:40,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63186 conditions, 10438 events. 6550/10438 cut-off events. For 353458/353463 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 69115 event pairs, 2814 based on Foata normal form. 4/10438 useless extension candidates. Maximal degree in co-relation 63099. Up to 10017 conditions per place. [2024-06-21 17:20:40,887 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 272 selfloop transitions, 38 changer transitions 0/314 dead transitions. [2024-06-21 17:20:40,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 314 transitions, 4631 flow [2024-06-21 17:20:40,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:20:40,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:20:40,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-21 17:20:40,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4013605442176871 [2024-06-21 17:20:40,889 INFO L175 Difference]: Start difference. First operand has 180 places, 285 transitions, 3715 flow. Second operand 7 states and 118 transitions. [2024-06-21 17:20:40,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 314 transitions, 4631 flow [2024-06-21 17:20:41,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 314 transitions, 4583 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 17:20:41,477 INFO L231 Difference]: Finished difference. Result has 181 places, 291 transitions, 3857 flow [2024-06-21 17:20:41,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3667, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3857, PETRI_PLACES=181, PETRI_TRANSITIONS=291} [2024-06-21 17:20:41,478 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 138 predicate places. [2024-06-21 17:20:41,478 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 291 transitions, 3857 flow [2024-06-21 17:20:41,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:41,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:20:41,479 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:20:41,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 17:20:41,479 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:20:41,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:20:41,479 INFO L85 PathProgramCache]: Analyzing trace with hash -540675430, now seen corresponding path program 3 times [2024-06-21 17:20:41,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:20:41,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917536742] [2024-06-21 17:20:41,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:20:41,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:20:41,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:20:43,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:20:43,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:20:43,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917536742] [2024-06-21 17:20:43,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917536742] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:20:43,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:20:43,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:20:43,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165772609] [2024-06-21 17:20:43,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:20:43,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:20:43,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:20:43,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:20:43,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:20:43,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:20:43,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 291 transitions, 3857 flow. Second operand has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:43,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:20:43,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:20:43,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:20:46,297 INFO L124 PetriNetUnfolderBase]: 6540/10425 cut-off events. [2024-06-21 17:20:46,297 INFO L125 PetriNetUnfolderBase]: For 368886/368888 co-relation queries the response was YES. [2024-06-21 17:20:46,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63558 conditions, 10425 events. 6540/10425 cut-off events. For 368886/368888 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 69021 event pairs, 2808 based on Foata normal form. 6/10428 useless extension candidates. Maximal degree in co-relation 63469. Up to 10014 conditions per place. [2024-06-21 17:20:46,387 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 275 selfloop transitions, 39 changer transitions 0/318 dead transitions. [2024-06-21 17:20:46,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 318 transitions, 4637 flow [2024-06-21 17:20:46,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:20:46,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:20:46,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-21 17:20:46,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-21 17:20:46,388 INFO L175 Difference]: Start difference. First operand has 181 places, 291 transitions, 3857 flow. Second operand 8 states and 132 transitions. [2024-06-21 17:20:46,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 318 transitions, 4637 flow [2024-06-21 17:20:47,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 318 transitions, 4540 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-21 17:20:47,006 INFO L231 Difference]: Finished difference. Result has 185 places, 291 transitions, 3852 flow [2024-06-21 17:20:47,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3760, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3852, PETRI_PLACES=185, PETRI_TRANSITIONS=291} [2024-06-21 17:20:47,006 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 142 predicate places. [2024-06-21 17:20:47,007 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 291 transitions, 3852 flow [2024-06-21 17:20:47,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:47,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:20:47,007 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:20:47,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 17:20:47,007 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:20:47,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:20:47,008 INFO L85 PathProgramCache]: Analyzing trace with hash -540675616, now seen corresponding path program 3 times [2024-06-21 17:20:47,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:20:47,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894834262] [2024-06-21 17:20:47,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:20:47,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:20:47,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:20:49,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:20:49,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:20:49,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894834262] [2024-06-21 17:20:49,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894834262] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:20:49,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:20:49,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:20:49,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388339066] [2024-06-21 17:20:49,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:20:49,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:20:49,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:20:49,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:20:49,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:20:49,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:20:49,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 291 transitions, 3852 flow. Second operand has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:49,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:20:49,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:20:49,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:20:51,927 INFO L124 PetriNetUnfolderBase]: 6514/10389 cut-off events. [2024-06-21 17:20:51,927 INFO L125 PetriNetUnfolderBase]: For 381499/381501 co-relation queries the response was YES. [2024-06-21 17:20:52,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63558 conditions, 10389 events. 6514/10389 cut-off events. For 381499/381501 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 68855 event pairs, 2805 based on Foata normal form. 6/10392 useless extension candidates. Maximal degree in co-relation 63468. Up to 9995 conditions per place. [2024-06-21 17:20:52,249 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 273 selfloop transitions, 40 changer transitions 0/317 dead transitions. [2024-06-21 17:20:52,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 317 transitions, 4552 flow [2024-06-21 17:20:52,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:20:52,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:20:52,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-21 17:20:52,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-21 17:20:52,251 INFO L175 Difference]: Start difference. First operand has 185 places, 291 transitions, 3852 flow. Second operand 8 states and 130 transitions. [2024-06-21 17:20:52,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 317 transitions, 4552 flow [2024-06-21 17:20:52,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 317 transitions, 4428 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-21 17:20:52,838 INFO L231 Difference]: Finished difference. Result has 186 places, 291 transitions, 3827 flow [2024-06-21 17:20:52,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3728, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3827, PETRI_PLACES=186, PETRI_TRANSITIONS=291} [2024-06-21 17:20:52,839 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 143 predicate places. [2024-06-21 17:20:52,839 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 291 transitions, 3827 flow [2024-06-21 17:20:52,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:52,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:20:52,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:20:52,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 17:20:52,839 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:20:52,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:20:52,840 INFO L85 PathProgramCache]: Analyzing trace with hash -540429352, now seen corresponding path program 1 times [2024-06-21 17:20:52,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:20:52,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737415854] [2024-06-21 17:20:52,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:20:52,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:20:52,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:20:56,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:20:56,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:20:56,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737415854] [2024-06-21 17:20:56,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737415854] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:20:56,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:20:56,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:20:56,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440338726] [2024-06-21 17:20:56,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:20:56,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:20:56,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:20:56,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:20:56,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:20:56,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:20:56,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 291 transitions, 3827 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:56,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:20:56,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:20:56,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:20:58,269 INFO L124 PetriNetUnfolderBase]: 6509/10381 cut-off events. [2024-06-21 17:20:58,269 INFO L125 PetriNetUnfolderBase]: For 393631/393633 co-relation queries the response was YES. [2024-06-21 17:20:58,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63830 conditions, 10381 events. 6509/10381 cut-off events. For 393631/393633 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 68712 event pairs, 2856 based on Foata normal form. 2/10380 useless extension candidates. Maximal degree in co-relation 63739. Up to 10121 conditions per place. [2024-06-21 17:20:58,382 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 290 selfloop transitions, 12 changer transitions 0/306 dead transitions. [2024-06-21 17:20:58,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 306 transitions, 4499 flow [2024-06-21 17:20:58,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:20:58,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:20:58,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 92 transitions. [2024-06-21 17:20:58,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36507936507936506 [2024-06-21 17:20:58,384 INFO L175 Difference]: Start difference. First operand has 186 places, 291 transitions, 3827 flow. Second operand 6 states and 92 transitions. [2024-06-21 17:20:58,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 306 transitions, 4499 flow [2024-06-21 17:20:59,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 306 transitions, 4411 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-21 17:20:59,064 INFO L231 Difference]: Finished difference. Result has 184 places, 293 transitions, 3804 flow [2024-06-21 17:20:59,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3739, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3804, PETRI_PLACES=184, PETRI_TRANSITIONS=293} [2024-06-21 17:20:59,065 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 141 predicate places. [2024-06-21 17:20:59,065 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 293 transitions, 3804 flow [2024-06-21 17:20:59,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:59,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:20:59,065 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:20:59,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 17:20:59,066 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:20:59,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:20:59,066 INFO L85 PathProgramCache]: Analyzing trace with hash -162280879, now seen corresponding path program 1 times [2024-06-21 17:20:59,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:20:59,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561573636] [2024-06-21 17:20:59,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:20:59,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:20:59,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:21:01,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:21:01,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:21:01,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561573636] [2024-06-21 17:21:01,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561573636] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:21:01,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:21:01,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:21:01,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650352419] [2024-06-21 17:21:01,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:21:01,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:21:01,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:21:01,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:21:01,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:21:01,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:21:01,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 293 transitions, 3804 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:01,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:21:01,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:21:01,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:21:04,688 INFO L124 PetriNetUnfolderBase]: 6669/10622 cut-off events. [2024-06-21 17:21:04,688 INFO L125 PetriNetUnfolderBase]: For 404892/404907 co-relation queries the response was YES. [2024-06-21 17:21:04,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65393 conditions, 10622 events. 6669/10622 cut-off events. For 404892/404907 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 70515 event pairs, 2707 based on Foata normal form. 30/10648 useless extension candidates. Maximal degree in co-relation 65302. Up to 9997 conditions per place. [2024-06-21 17:21:04,795 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 262 selfloop transitions, 81 changer transitions 4/351 dead transitions. [2024-06-21 17:21:04,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 351 transitions, 4964 flow [2024-06-21 17:21:04,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:21:04,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:21:04,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-21 17:21:04,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-21 17:21:04,796 INFO L175 Difference]: Start difference. First operand has 184 places, 293 transitions, 3804 flow. Second operand 9 states and 154 transitions. [2024-06-21 17:21:04,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 351 transitions, 4964 flow [2024-06-21 17:21:05,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 351 transitions, 4915 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-21 17:21:05,434 INFO L231 Difference]: Finished difference. Result has 190 places, 314 transitions, 4292 flow [2024-06-21 17:21:05,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3755, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4292, PETRI_PLACES=190, PETRI_TRANSITIONS=314} [2024-06-21 17:21:05,436 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 147 predicate places. [2024-06-21 17:21:05,436 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 314 transitions, 4292 flow [2024-06-21 17:21:05,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:05,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:21:05,436 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:21:05,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 17:21:05,437 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:21:05,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:21:05,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1672461663, now seen corresponding path program 2 times [2024-06-21 17:21:05,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:21:05,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175874348] [2024-06-21 17:21:05,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:21:05,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:21:05,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:21:08,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:21:08,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:21:08,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175874348] [2024-06-21 17:21:08,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175874348] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:21:08,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:21:08,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:21:08,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934720152] [2024-06-21 17:21:08,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:21:08,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:21:08,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:21:08,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:21:08,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:21:08,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:21:08,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 314 transitions, 4292 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:08,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:21:08,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:21:08,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:21:11,449 INFO L124 PetriNetUnfolderBase]: 7148/11346 cut-off events. [2024-06-21 17:21:11,449 INFO L125 PetriNetUnfolderBase]: For 451196/451205 co-relation queries the response was YES. [2024-06-21 17:21:11,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72029 conditions, 11346 events. 7148/11346 cut-off events. For 451196/451205 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 75431 event pairs, 2492 based on Foata normal form. 22/11364 useless extension candidates. Maximal degree in co-relation 71936. Up to 9729 conditions per place. [2024-06-21 17:21:11,550 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 246 selfloop transitions, 143 changer transitions 0/393 dead transitions. [2024-06-21 17:21:11,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 393 transitions, 5991 flow [2024-06-21 17:21:11,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:21:11,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:21:11,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-21 17:21:11,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4021164021164021 [2024-06-21 17:21:11,552 INFO L175 Difference]: Start difference. First operand has 190 places, 314 transitions, 4292 flow. Second operand 9 states and 152 transitions. [2024-06-21 17:21:11,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 393 transitions, 5991 flow [2024-06-21 17:21:12,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 393 transitions, 5775 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-21 17:21:12,319 INFO L231 Difference]: Finished difference. Result has 195 places, 359 transitions, 5238 flow [2024-06-21 17:21:12,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4098, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5238, PETRI_PLACES=195, PETRI_TRANSITIONS=359} [2024-06-21 17:21:12,319 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 152 predicate places. [2024-06-21 17:21:12,319 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 359 transitions, 5238 flow [2024-06-21 17:21:12,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:12,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:21:12,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:21:12,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 17:21:12,320 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:21:12,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:21:12,320 INFO L85 PathProgramCache]: Analyzing trace with hash -161963749, now seen corresponding path program 3 times [2024-06-21 17:21:12,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:21:12,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441567477] [2024-06-21 17:21:12,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:21:12,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:21:12,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:21:15,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:21:15,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:21:15,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441567477] [2024-06-21 17:21:15,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441567477] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:21:15,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:21:15,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:21:15,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591839880] [2024-06-21 17:21:15,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:21:15,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:21:15,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:21:15,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:21:15,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:21:15,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:21:15,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 359 transitions, 5238 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:15,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:21:15,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:21:15,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:21:18,528 INFO L124 PetriNetUnfolderBase]: 7100/11286 cut-off events. [2024-06-21 17:21:18,528 INFO L125 PetriNetUnfolderBase]: For 461349/461358 co-relation queries the response was YES. [2024-06-21 17:21:18,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73240 conditions, 11286 events. 7100/11286 cut-off events. For 461349/461358 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 75103 event pairs, 2643 based on Foata normal form. 22/11304 useless extension candidates. Maximal degree in co-relation 73145. Up to 9701 conditions per place. [2024-06-21 17:21:18,622 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 244 selfloop transitions, 145 changer transitions 1/394 dead transitions. [2024-06-21 17:21:18,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 394 transitions, 6247 flow [2024-06-21 17:21:18,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:21:18,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:21:18,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 166 transitions. [2024-06-21 17:21:18,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3952380952380952 [2024-06-21 17:21:18,625 INFO L175 Difference]: Start difference. First operand has 195 places, 359 transitions, 5238 flow. Second operand 10 states and 166 transitions. [2024-06-21 17:21:18,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 394 transitions, 6247 flow [2024-06-21 17:21:19,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 394 transitions, 6159 flow, removed 33 selfloop flow, removed 3 redundant places. [2024-06-21 17:21:19,491 INFO L231 Difference]: Finished difference. Result has 205 places, 364 transitions, 5627 flow [2024-06-21 17:21:19,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5150, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5627, PETRI_PLACES=205, PETRI_TRANSITIONS=364} [2024-06-21 17:21:19,492 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 162 predicate places. [2024-06-21 17:21:19,492 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 364 transitions, 5627 flow [2024-06-21 17:21:19,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:19,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:21:19,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:21:19,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 17:21:19,493 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:21:19,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:21:19,493 INFO L85 PathProgramCache]: Analyzing trace with hash 2026868733, now seen corresponding path program 4 times [2024-06-21 17:21:19,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:21:19,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823031354] [2024-06-21 17:21:19,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:21:19,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:21:19,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:21:22,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:21:22,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:21:22,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823031354] [2024-06-21 17:21:22,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823031354] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:21:22,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:21:22,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:21:22,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650553444] [2024-06-21 17:21:22,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:21:22,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:21:22,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:21:22,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:21:22,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:21:22,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:21:22,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 364 transitions, 5627 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:22,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:21:22,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:21:22,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:21:25,863 INFO L124 PetriNetUnfolderBase]: 7132/11357 cut-off events. [2024-06-21 17:21:25,864 INFO L125 PetriNetUnfolderBase]: For 479025/479040 co-relation queries the response was YES. [2024-06-21 17:21:25,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75713 conditions, 11357 events. 7132/11357 cut-off events. For 479025/479040 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 75783 event pairs, 2588 based on Foata normal form. 22/11375 useless extension candidates. Maximal degree in co-relation 75614. Up to 9084 conditions per place. [2024-06-21 17:21:26,010 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 195 selfloop transitions, 216 changer transitions 1/416 dead transitions. [2024-06-21 17:21:26,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 416 transitions, 6861 flow [2024-06-21 17:21:26,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:21:26,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:21:26,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-21 17:21:26,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4576719576719577 [2024-06-21 17:21:26,011 INFO L175 Difference]: Start difference. First operand has 205 places, 364 transitions, 5627 flow. Second operand 9 states and 173 transitions. [2024-06-21 17:21:26,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 416 transitions, 6861 flow [2024-06-21 17:21:27,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 416 transitions, 6570 flow, removed 57 selfloop flow, removed 6 redundant places. [2024-06-21 17:21:27,085 INFO L231 Difference]: Finished difference. Result has 208 places, 368 transitions, 5883 flow [2024-06-21 17:21:27,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5336, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=212, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5883, PETRI_PLACES=208, PETRI_TRANSITIONS=368} [2024-06-21 17:21:27,085 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 165 predicate places. [2024-06-21 17:21:27,085 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 368 transitions, 5883 flow [2024-06-21 17:21:27,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:27,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:21:27,086 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:21:27,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 17:21:27,086 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:21:27,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:21:27,086 INFO L85 PathProgramCache]: Analyzing trace with hash 426099127, now seen corresponding path program 5 times [2024-06-21 17:21:27,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:21:27,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758678845] [2024-06-21 17:21:27,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:21:27,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:21:27,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:21:29,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:21:29,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:21:29,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758678845] [2024-06-21 17:21:29,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758678845] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:21:29,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:21:29,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:21:29,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145273496] [2024-06-21 17:21:29,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:21:29,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:21:29,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:21:29,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:21:29,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:21:30,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:21:30,009 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 368 transitions, 5883 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:30,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:21:30,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:21:30,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:21:33,045 INFO L124 PetriNetUnfolderBase]: 7356/11691 cut-off events. [2024-06-21 17:21:33,045 INFO L125 PetriNetUnfolderBase]: For 524566/524588 co-relation queries the response was YES. [2024-06-21 17:21:33,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79636 conditions, 11691 events. 7356/11691 cut-off events. For 524566/524588 co-relation queries the response was YES. Maximal size of possible extension queue 525. Compared 78071 event pairs, 1991 based on Foata normal form. 17/11689 useless extension candidates. Maximal degree in co-relation 79537. Up to 8913 conditions per place. [2024-06-21 17:21:33,169 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 183 selfloop transitions, 228 changer transitions 0/415 dead transitions. [2024-06-21 17:21:33,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 415 transitions, 7337 flow [2024-06-21 17:21:33,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:21:33,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:21:33,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-21 17:21:33,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 17:21:33,171 INFO L175 Difference]: Start difference. First operand has 208 places, 368 transitions, 5883 flow. Second operand 8 states and 144 transitions. [2024-06-21 17:21:33,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 415 transitions, 7337 flow [2024-06-21 17:21:34,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 415 transitions, 6996 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 17:21:34,282 INFO L231 Difference]: Finished difference. Result has 212 places, 385 transitions, 6399 flow [2024-06-21 17:21:34,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5542, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=215, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6399, PETRI_PLACES=212, PETRI_TRANSITIONS=385} [2024-06-21 17:21:34,282 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 169 predicate places. [2024-06-21 17:21:34,282 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 385 transitions, 6399 flow [2024-06-21 17:21:34,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:34,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:21:34,283 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:21:34,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 17:21:34,283 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:21:34,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:21:34,283 INFO L85 PathProgramCache]: Analyzing trace with hash 413212117, now seen corresponding path program 6 times [2024-06-21 17:21:34,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:21:34,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870597257] [2024-06-21 17:21:34,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:21:34,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:21:34,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:21:37,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:21:37,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:21:37,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870597257] [2024-06-21 17:21:37,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870597257] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:21:37,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:21:37,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:21:37,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396447094] [2024-06-21 17:21:37,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:21:37,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:21:37,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:21:37,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:21:37,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:21:37,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:21:37,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 385 transitions, 6399 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:37,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:21:37,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:21:37,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:21:40,213 INFO L124 PetriNetUnfolderBase]: 7344/11662 cut-off events. [2024-06-21 17:21:40,214 INFO L125 PetriNetUnfolderBase]: For 551263/551272 co-relation queries the response was YES. [2024-06-21 17:21:40,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82691 conditions, 11662 events. 7344/11662 cut-off events. For 551263/551272 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 77846 event pairs, 2591 based on Foata normal form. 14/11672 useless extension candidates. Maximal degree in co-relation 82589. Up to 9397 conditions per place. [2024-06-21 17:21:40,394 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 214 selfloop transitions, 198 changer transitions 0/416 dead transitions. [2024-06-21 17:21:40,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 416 transitions, 7399 flow [2024-06-21 17:21:40,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:21:40,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:21:40,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-21 17:21:40,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 17:21:40,395 INFO L175 Difference]: Start difference. First operand has 212 places, 385 transitions, 6399 flow. Second operand 8 states and 144 transitions. [2024-06-21 17:21:40,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 416 transitions, 7399 flow [2024-06-21 17:21:41,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 416 transitions, 7137 flow, removed 64 selfloop flow, removed 3 redundant places. [2024-06-21 17:21:41,772 INFO L231 Difference]: Finished difference. Result has 217 places, 385 transitions, 6556 flow [2024-06-21 17:21:41,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6137, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6556, PETRI_PLACES=217, PETRI_TRANSITIONS=385} [2024-06-21 17:21:41,773 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 174 predicate places. [2024-06-21 17:21:41,773 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 385 transitions, 6556 flow [2024-06-21 17:21:41,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:41,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:21:41,774 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:21:41,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 17:21:41,774 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:21:41,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:21:41,775 INFO L85 PathProgramCache]: Analyzing trace with hash 641167333, now seen corresponding path program 1 times [2024-06-21 17:21:41,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:21:41,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479303911] [2024-06-21 17:21:41,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:21:41,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:21:41,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:21:44,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:21:44,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:21:44,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479303911] [2024-06-21 17:21:44,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479303911] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:21:44,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:21:44,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:21:44,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143024765] [2024-06-21 17:21:44,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:21:44,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:21:44,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:21:44,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:21:44,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:21:44,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:21:44,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 385 transitions, 6556 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:44,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:21:44,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:21:44,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:21:47,734 INFO L124 PetriNetUnfolderBase]: 7332/11641 cut-off events. [2024-06-21 17:21:47,734 INFO L125 PetriNetUnfolderBase]: For 569450/569452 co-relation queries the response was YES. [2024-06-21 17:21:47,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82940 conditions, 11641 events. 7332/11641 cut-off events. For 569450/569452 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 77677 event pairs, 2964 based on Foata normal form. 4/11642 useless extension candidates. Maximal degree in co-relation 82837. Up to 11129 conditions per place. [2024-06-21 17:21:47,881 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 367 selfloop transitions, 43 changer transitions 0/414 dead transitions. [2024-06-21 17:21:47,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 414 transitions, 7456 flow [2024-06-21 17:21:47,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:21:47,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:21:47,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-21 17:21:47,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-21 17:21:47,882 INFO L175 Difference]: Start difference. First operand has 217 places, 385 transitions, 6556 flow. Second operand 8 states and 135 transitions. [2024-06-21 17:21:47,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 414 transitions, 7456 flow [2024-06-21 17:21:49,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 414 transitions, 6829 flow, removed 15 selfloop flow, removed 9 redundant places. [2024-06-21 17:21:49,115 INFO L231 Difference]: Finished difference. Result has 216 places, 385 transitions, 6021 flow [2024-06-21 17:21:49,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5929, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6021, PETRI_PLACES=216, PETRI_TRANSITIONS=385} [2024-06-21 17:21:49,116 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 173 predicate places. [2024-06-21 17:21:49,116 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 385 transitions, 6021 flow [2024-06-21 17:21:49,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:49,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:21:49,116 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:21:49,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 17:21:49,116 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:21:49,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:21:49,117 INFO L85 PathProgramCache]: Analyzing trace with hash -1068899355, now seen corresponding path program 1 times [2024-06-21 17:21:49,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:21:49,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55270718] [2024-06-21 17:21:49,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:21:49,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:21:49,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:21:51,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:21:51,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:21:51,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55270718] [2024-06-21 17:21:51,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55270718] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:21:51,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:21:51,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:21:51,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716141163] [2024-06-21 17:21:51,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:21:51,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:21:51,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:21:51,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:21:51,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:21:51,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:21:51,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 385 transitions, 6021 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:51,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:21:51,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:21:51,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:21:55,245 INFO L124 PetriNetUnfolderBase]: 7512/11886 cut-off events. [2024-06-21 17:21:55,245 INFO L125 PetriNetUnfolderBase]: For 550706/550711 co-relation queries the response was YES. [2024-06-21 17:21:55,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82945 conditions, 11886 events. 7512/11886 cut-off events. For 550706/550711 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 79129 event pairs, 2556 based on Foata normal form. 6/11888 useless extension candidates. Maximal degree in co-relation 82841. Up to 9425 conditions per place. [2024-06-21 17:21:55,352 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 222 selfloop transitions, 218 changer transitions 0/444 dead transitions. [2024-06-21 17:21:55,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 444 transitions, 7481 flow [2024-06-21 17:21:55,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:21:55,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:21:55,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-21 17:21:55,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.430952380952381 [2024-06-21 17:21:55,354 INFO L175 Difference]: Start difference. First operand has 216 places, 385 transitions, 6021 flow. Second operand 10 states and 181 transitions. [2024-06-21 17:21:55,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 444 transitions, 7481 flow [2024-06-21 17:21:56,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 444 transitions, 7308 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-21 17:21:56,402 INFO L231 Difference]: Finished difference. Result has 218 places, 396 transitions, 6534 flow [2024-06-21 17:21:56,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5852, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=210, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6534, PETRI_PLACES=218, PETRI_TRANSITIONS=396} [2024-06-21 17:21:56,403 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 175 predicate places. [2024-06-21 17:21:56,403 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 396 transitions, 6534 flow [2024-06-21 17:21:56,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:56,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:21:56,403 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:21:56,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 17:21:56,403 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:21:56,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:21:56,403 INFO L85 PathProgramCache]: Analyzing trace with hash -902926499, now seen corresponding path program 1 times [2024-06-21 17:21:56,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:21:56,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176729118] [2024-06-21 17:21:56,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:21:56,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:21:56,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:21:59,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:21:59,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:21:59,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176729118] [2024-06-21 17:21:59,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176729118] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:21:59,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:21:59,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:21:59,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701667083] [2024-06-21 17:21:59,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:21:59,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:21:59,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:21:59,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:21:59,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:21:59,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:21:59,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 396 transitions, 6534 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:59,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:21:59,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:21:59,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:22:02,699 INFO L124 PetriNetUnfolderBase]: 7720/12166 cut-off events. [2024-06-21 17:22:02,700 INFO L125 PetriNetUnfolderBase]: For 593792/593797 co-relation queries the response was YES. [2024-06-21 17:22:02,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88609 conditions, 12166 events. 7720/12166 cut-off events. For 593792/593797 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 80768 event pairs, 2897 based on Foata normal form. 38/12200 useless extension candidates. Maximal degree in co-relation 88505. Up to 11295 conditions per place. [2024-06-21 17:22:02,842 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 337 selfloop transitions, 108 changer transitions 6/455 dead transitions. [2024-06-21 17:22:02,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 455 transitions, 8132 flow [2024-06-21 17:22:02,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:22:02,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:22:02,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-21 17:22:02,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-06-21 17:22:02,844 INFO L175 Difference]: Start difference. First operand has 218 places, 396 transitions, 6534 flow. Second operand 9 states and 151 transitions. [2024-06-21 17:22:02,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 455 transitions, 8132 flow [2024-06-21 17:22:04,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 455 transitions, 7852 flow, removed 58 selfloop flow, removed 5 redundant places. [2024-06-21 17:22:04,294 INFO L231 Difference]: Finished difference. Result has 224 places, 420 transitions, 7075 flow [2024-06-21 17:22:04,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6278, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7075, PETRI_PLACES=224, PETRI_TRANSITIONS=420} [2024-06-21 17:22:04,294 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 181 predicate places. [2024-06-21 17:22:04,295 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 420 transitions, 7075 flow [2024-06-21 17:22:04,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:04,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:22:04,295 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:22:04,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 17:22:04,295 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:22:04,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:22:04,296 INFO L85 PathProgramCache]: Analyzing trace with hash -183335475, now seen corresponding path program 2 times [2024-06-21 17:22:04,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:22:04,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765817836] [2024-06-21 17:22:04,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:22:04,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:22:04,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:22:07,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:22:07,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:22:07,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765817836] [2024-06-21 17:22:07,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765817836] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:22:07,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:22:07,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:22:07,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411217896] [2024-06-21 17:22:07,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:22:07,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:22:07,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:22:07,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:22:07,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:22:07,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:22:07,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 420 transitions, 7075 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:07,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:22:07,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:22:07,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:22:10,639 INFO L124 PetriNetUnfolderBase]: 7568/11994 cut-off events. [2024-06-21 17:22:10,639 INFO L125 PetriNetUnfolderBase]: For 556202/556215 co-relation queries the response was YES. [2024-06-21 17:22:10,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85359 conditions, 11994 events. 7568/11994 cut-off events. For 556202/556215 co-relation queries the response was YES. Maximal size of possible extension queue 523. Compared 79989 event pairs, 2792 based on Foata normal form. 34/12024 useless extension candidates. Maximal degree in co-relation 85251. Up to 10311 conditions per place. [2024-06-21 17:22:10,760 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 282 selfloop transitions, 170 changer transitions 2/458 dead transitions. [2024-06-21 17:22:10,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 458 transitions, 8431 flow [2024-06-21 17:22:10,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:22:10,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:22:10,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-21 17:22:10,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3976190476190476 [2024-06-21 17:22:10,762 INFO L175 Difference]: Start difference. First operand has 224 places, 420 transitions, 7075 flow. Second operand 10 states and 167 transitions. [2024-06-21 17:22:10,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 458 transitions, 8431 flow [2024-06-21 17:22:11,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 458 transitions, 8234 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-21 17:22:11,930 INFO L231 Difference]: Finished difference. Result has 229 places, 426 transitions, 7382 flow [2024-06-21 17:22:11,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6878, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7382, PETRI_PLACES=229, PETRI_TRANSITIONS=426} [2024-06-21 17:22:11,931 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 186 predicate places. [2024-06-21 17:22:11,931 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 426 transitions, 7382 flow [2024-06-21 17:22:11,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:11,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:22:11,931 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:22:11,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 17:22:11,931 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:22:11,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:22:11,932 INFO L85 PathProgramCache]: Analyzing trace with hash -725557829, now seen corresponding path program 3 times [2024-06-21 17:22:11,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:22:11,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908169501] [2024-06-21 17:22:11,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:22:11,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:22:11,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:22:15,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:22:15,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:22:15,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908169501] [2024-06-21 17:22:15,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908169501] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:22:15,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:22:15,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:22:15,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479544384] [2024-06-21 17:22:15,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:22:15,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:22:15,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:22:15,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:22:15,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:22:15,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:22:15,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 426 transitions, 7382 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:15,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:22:15,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:22:15,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:22:18,849 INFO L124 PetriNetUnfolderBase]: 7496/11890 cut-off events. [2024-06-21 17:22:18,849 INFO L125 PetriNetUnfolderBase]: For 556049/556062 co-relation queries the response was YES. [2024-06-21 17:22:18,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85066 conditions, 11890 events. 7496/11890 cut-off events. For 556049/556062 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 79354 event pairs, 2711 based on Foata normal form. 18/11904 useless extension candidates. Maximal degree in co-relation 84957. Up to 10279 conditions per place. [2024-06-21 17:22:18,981 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 281 selfloop transitions, 164 changer transitions 4/453 dead transitions. [2024-06-21 17:22:18,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 453 transitions, 8444 flow [2024-06-21 17:22:18,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:22:18,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:22:18,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-21 17:22:18,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-21 17:22:18,982 INFO L175 Difference]: Start difference. First operand has 229 places, 426 transitions, 7382 flow. Second operand 9 states and 150 transitions. [2024-06-21 17:22:18,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 453 transitions, 8444 flow [2024-06-21 17:22:20,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 453 transitions, 8223 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-21 17:22:20,351 INFO L231 Difference]: Finished difference. Result has 233 places, 422 transitions, 7411 flow [2024-06-21 17:22:20,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7161, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7411, PETRI_PLACES=233, PETRI_TRANSITIONS=422} [2024-06-21 17:22:20,352 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 190 predicate places. [2024-06-21 17:22:20,352 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 422 transitions, 7411 flow [2024-06-21 17:22:20,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:20,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:22:20,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:22:20,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 17:22:20,353 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:22:20,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:22:20,353 INFO L85 PathProgramCache]: Analyzing trace with hash -725548901, now seen corresponding path program 1 times [2024-06-21 17:22:20,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:22:20,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184940724] [2024-06-21 17:22:20,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:22:20,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:22:20,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:22:24,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:22:24,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:22:24,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184940724] [2024-06-21 17:22:24,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184940724] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:22:24,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:22:24,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:22:24,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858568020] [2024-06-21 17:22:24,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:22:24,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:22:24,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:22:24,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:22:24,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:22:24,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:22:24,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 422 transitions, 7411 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:24,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:22:24,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:22:24,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:22:27,962 INFO L124 PetriNetUnfolderBase]: 7408/11794 cut-off events. [2024-06-21 17:22:27,962 INFO L125 PetriNetUnfolderBase]: For 572451/572457 co-relation queries the response was YES. [2024-06-21 17:22:28,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84380 conditions, 11794 events. 7408/11794 cut-off events. For 572451/572457 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 79075 event pairs, 2973 based on Foata normal form. 8/11799 useless extension candidates. Maximal degree in co-relation 84271. Up to 11371 conditions per place. [2024-06-21 17:22:28,082 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 419 selfloop transitions, 25 changer transitions 0/448 dead transitions. [2024-06-21 17:22:28,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 448 transitions, 8425 flow [2024-06-21 17:22:28,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:22:28,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:22:28,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-21 17:22:28,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36607142857142855 [2024-06-21 17:22:28,084 INFO L175 Difference]: Start difference. First operand has 233 places, 422 transitions, 7411 flow. Second operand 8 states and 123 transitions. [2024-06-21 17:22:28,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 448 transitions, 8425 flow [2024-06-21 17:22:29,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 448 transitions, 8169 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-21 17:22:29,318 INFO L231 Difference]: Finished difference. Result has 235 places, 424 transitions, 7267 flow [2024-06-21 17:22:29,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7155, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7267, PETRI_PLACES=235, PETRI_TRANSITIONS=424} [2024-06-21 17:22:29,318 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 192 predicate places. [2024-06-21 17:22:29,318 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 424 transitions, 7267 flow [2024-06-21 17:22:29,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:29,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:22:29,319 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:22:29,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 17:22:29,319 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:22:29,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:22:29,320 INFO L85 PathProgramCache]: Analyzing trace with hash 2044520671, now seen corresponding path program 2 times [2024-06-21 17:22:29,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:22:29,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345841624] [2024-06-21 17:22:29,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:22:29,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:22:29,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:22:32,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:22:32,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:22:32,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345841624] [2024-06-21 17:22:32,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345841624] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:22:32,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:22:32,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:22:32,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675624647] [2024-06-21 17:22:32,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:22:32,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:22:32,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:22:32,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:22:32,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:22:32,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:22:32,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 424 transitions, 7267 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:32,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:22:32,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:22:32,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:22:35,388 INFO L124 PetriNetUnfolderBase]: 7482/11784 cut-off events. [2024-06-21 17:22:35,389 INFO L125 PetriNetUnfolderBase]: For 610530/610532 co-relation queries the response was YES. [2024-06-21 17:22:35,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85249 conditions, 11784 events. 7482/11784 cut-off events. For 610530/610532 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 77603 event pairs, 2171 based on Foata normal form. 2/11766 useless extension candidates. Maximal degree in co-relation 85139. Up to 8804 conditions per place. [2024-06-21 17:22:35,521 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 192 selfloop transitions, 294 changer transitions 0/490 dead transitions. [2024-06-21 17:22:35,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 490 transitions, 9289 flow [2024-06-21 17:22:35,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:22:35,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:22:35,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-21 17:22:35,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-21 17:22:35,522 INFO L175 Difference]: Start difference. First operand has 235 places, 424 transitions, 7267 flow. Second operand 8 states and 154 transitions. [2024-06-21 17:22:35,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 490 transitions, 9289 flow [2024-06-21 17:22:37,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 490 transitions, 9199 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-21 17:22:37,011 INFO L231 Difference]: Finished difference. Result has 239 places, 450 transitions, 8497 flow [2024-06-21 17:22:37,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7177, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=273, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8497, PETRI_PLACES=239, PETRI_TRANSITIONS=450} [2024-06-21 17:22:37,012 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 196 predicate places. [2024-06-21 17:22:37,012 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 450 transitions, 8497 flow [2024-06-21 17:22:37,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:37,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:22:37,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:22:37,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 17:22:37,013 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:22:37,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:22:37,013 INFO L85 PathProgramCache]: Analyzing trace with hash 550516057, now seen corresponding path program 3 times [2024-06-21 17:22:37,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:22:37,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193119788] [2024-06-21 17:22:37,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:22:37,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:22:37,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:22:39,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:22:39,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:22:39,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193119788] [2024-06-21 17:22:39,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193119788] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:22:39,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:22:39,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:22:39,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605569983] [2024-06-21 17:22:39,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:22:39,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:22:39,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:22:39,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:22:39,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:22:39,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:22:39,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 450 transitions, 8497 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:39,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:22:39,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:22:39,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:22:43,425 INFO L124 PetriNetUnfolderBase]: 7476/11780 cut-off events. [2024-06-21 17:22:43,425 INFO L125 PetriNetUnfolderBase]: For 654976/654978 co-relation queries the response was YES. [2024-06-21 17:22:43,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90135 conditions, 11780 events. 7476/11780 cut-off events. For 654976/654978 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 77701 event pairs, 2175 based on Foata normal form. 2/11762 useless extension candidates. Maximal degree in co-relation 90022. Up to 8803 conditions per place. [2024-06-21 17:22:43,550 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 184 selfloop transitions, 299 changer transitions 0/487 dead transitions. [2024-06-21 17:22:43,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 487 transitions, 10034 flow [2024-06-21 17:22:43,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:22:43,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:22:43,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-21 17:22:43,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-21 17:22:43,552 INFO L175 Difference]: Start difference. First operand has 239 places, 450 transitions, 8497 flow. Second operand 8 states and 149 transitions. [2024-06-21 17:22:43,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 487 transitions, 10034 flow [2024-06-21 17:22:44,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 487 transitions, 9872 flow, removed 80 selfloop flow, removed 1 redundant places. [2024-06-21 17:22:45,006 INFO L231 Difference]: Finished difference. Result has 246 places, 452 transitions, 9018 flow [2024-06-21 17:22:45,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8353, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=297, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9018, PETRI_PLACES=246, PETRI_TRANSITIONS=452} [2024-06-21 17:22:45,007 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 203 predicate places. [2024-06-21 17:22:45,007 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 452 transitions, 9018 flow [2024-06-21 17:22:45,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:45,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:22:45,007 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:22:45,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 17:22:45,008 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:22:45,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:22:45,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1695290933, now seen corresponding path program 4 times [2024-06-21 17:22:45,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:22:45,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795421110] [2024-06-21 17:22:45,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:22:45,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:22:45,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:22:47,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:22:47,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:22:47,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795421110] [2024-06-21 17:22:47,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795421110] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:22:47,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:22:47,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:22:47,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032931264] [2024-06-21 17:22:47,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:22:47,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:22:47,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:22:47,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:22:47,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:22:47,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:22:47,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 452 transitions, 9018 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:47,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:22:47,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:22:47,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:22:51,212 INFO L124 PetriNetUnfolderBase]: 7470/11798 cut-off events. [2024-06-21 17:22:51,212 INFO L125 PetriNetUnfolderBase]: For 676671/676673 co-relation queries the response was YES. [2024-06-21 17:22:51,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91989 conditions, 11798 events. 7470/11798 cut-off events. For 676671/676673 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 78157 event pairs, 2823 based on Foata normal form. 2/11786 useless extension candidates. Maximal degree in co-relation 91873. Up to 10978 conditions per place. [2024-06-21 17:22:51,360 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 362 selfloop transitions, 120 changer transitions 0/486 dead transitions. [2024-06-21 17:22:51,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 486 transitions, 10219 flow [2024-06-21 17:22:51,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:22:51,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:22:51,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-21 17:22:51,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4021164021164021 [2024-06-21 17:22:51,361 INFO L175 Difference]: Start difference. First operand has 246 places, 452 transitions, 9018 flow. Second operand 9 states and 152 transitions. [2024-06-21 17:22:51,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 486 transitions, 10219 flow [2024-06-21 17:22:53,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 486 transitions, 9611 flow, removed 62 selfloop flow, removed 4 redundant places. [2024-06-21 17:22:53,235 INFO L231 Difference]: Finished difference. Result has 252 places, 453 transitions, 8717 flow [2024-06-21 17:22:53,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8412, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8717, PETRI_PLACES=252, PETRI_TRANSITIONS=453} [2024-06-21 17:22:53,236 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 209 predicate places. [2024-06-21 17:22:53,236 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 453 transitions, 8717 flow [2024-06-21 17:22:53,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:53,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:22:53,237 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:22:53,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 17:22:53,237 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:22:53,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:22:53,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1816739677, now seen corresponding path program 4 times [2024-06-21 17:22:53,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:22:53,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100911077] [2024-06-21 17:22:53,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:22:53,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:22:53,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:22:56,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:22:56,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:22:56,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100911077] [2024-06-21 17:22:56,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100911077] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:22:56,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:22:56,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:22:56,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115500113] [2024-06-21 17:22:56,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:22:56,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:22:56,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:22:56,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:22:56,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:22:56,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:22:56,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 453 transitions, 8717 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:56,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:22:56,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:22:56,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:22:59,671 INFO L124 PetriNetUnfolderBase]: 7362/11675 cut-off events. [2024-06-21 17:22:59,672 INFO L125 PetriNetUnfolderBase]: For 680627/680629 co-relation queries the response was YES. [2024-06-21 17:22:59,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88661 conditions, 11675 events. 7362/11675 cut-off events. For 680627/680629 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 77528 event pairs, 2863 based on Foata normal form. 12/11673 useless extension candidates. Maximal degree in co-relation 88543. Up to 10989 conditions per place. [2024-06-21 17:22:59,798 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 368 selfloop transitions, 99 changer transitions 9/480 dead transitions. [2024-06-21 17:22:59,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 480 transitions, 9749 flow [2024-06-21 17:22:59,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:22:59,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:22:59,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-21 17:22:59,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835978835978836 [2024-06-21 17:22:59,800 INFO L175 Difference]: Start difference. First operand has 252 places, 453 transitions, 8717 flow. Second operand 9 states and 145 transitions. [2024-06-21 17:22:59,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 480 transitions, 9749 flow [2024-06-21 17:23:01,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 480 transitions, 9501 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-21 17:23:01,575 INFO L231 Difference]: Finished difference. Result has 255 places, 445 transitions, 8470 flow [2024-06-21 17:23:01,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8469, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8470, PETRI_PLACES=255, PETRI_TRANSITIONS=445} [2024-06-21 17:23:01,576 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 212 predicate places. [2024-06-21 17:23:01,576 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 445 transitions, 8470 flow [2024-06-21 17:23:01,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:23:01,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:23:01,576 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:23:01,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 17:23:01,576 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:23:01,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:23:01,578 INFO L85 PathProgramCache]: Analyzing trace with hash -2123548869, now seen corresponding path program 5 times [2024-06-21 17:23:01,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:23:01,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182406875] [2024-06-21 17:23:01,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:23:01,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:23:01,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:23:04,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:23:04,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:23:04,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182406875] [2024-06-21 17:23:04,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182406875] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:23:04,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:23:04,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:23:04,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822947521] [2024-06-21 17:23:04,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:23:04,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:23:04,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:23:04,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:23:04,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:23:04,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:23:04,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 445 transitions, 8470 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:23:04,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:23:04,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:23:04,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:23:07,490 INFO L124 PetriNetUnfolderBase]: 7459/11762 cut-off events. [2024-06-21 17:23:07,490 INFO L125 PetriNetUnfolderBase]: For 723388/723390 co-relation queries the response was YES. [2024-06-21 17:23:07,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90530 conditions, 11762 events. 7459/11762 cut-off events. For 723388/723390 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 77529 event pairs, 2749 based on Foata normal form. 6/11754 useless extension candidates. Maximal degree in co-relation 90411. Up to 10767 conditions per place. [2024-06-21 17:23:07,643 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 342 selfloop transitions, 151 changer transitions 0/497 dead transitions. [2024-06-21 17:23:07,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 497 transitions, 10245 flow [2024-06-21 17:23:07,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:23:07,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:23:07,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-21 17:23:07,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-06-21 17:23:07,644 INFO L175 Difference]: Start difference. First operand has 255 places, 445 transitions, 8470 flow. Second operand 9 states and 151 transitions. [2024-06-21 17:23:07,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 497 transitions, 10245 flow [2024-06-21 17:23:09,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 497 transitions, 9629 flow, removed 4 selfloop flow, removed 12 redundant places. [2024-06-21 17:23:09,805 INFO L231 Difference]: Finished difference. Result has 254 places, 470 transitions, 8792 flow [2024-06-21 17:23:09,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7862, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8792, PETRI_PLACES=254, PETRI_TRANSITIONS=470} [2024-06-21 17:23:09,806 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 211 predicate places. [2024-06-21 17:23:09,806 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 470 transitions, 8792 flow [2024-06-21 17:23:09,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:23:09,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:23:09,806 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:23:09,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 17:23:09,806 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:23:09,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:23:09,807 INFO L85 PathProgramCache]: Analyzing trace with hash -2123727615, now seen corresponding path program 5 times [2024-06-21 17:23:09,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:23:09,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322308275] [2024-06-21 17:23:09,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:23:09,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:23:09,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:23:12,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:23:12,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:23:12,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322308275] [2024-06-21 17:23:12,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322308275] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:23:12,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:23:12,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:23:12,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026124552] [2024-06-21 17:23:12,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:23:12,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:23:12,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:23:12,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:23:12,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:23:12,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:23:12,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 470 transitions, 8792 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:23:12,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:23:12,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:23:12,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:23:16,119 INFO L124 PetriNetUnfolderBase]: 7441/11739 cut-off events. [2024-06-21 17:23:16,119 INFO L125 PetriNetUnfolderBase]: For 731001/731003 co-relation queries the response was YES. [2024-06-21 17:23:16,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90981 conditions, 11739 events. 7441/11739 cut-off events. For 731001/731003 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 77484 event pairs, 2749 based on Foata normal form. 6/11731 useless extension candidates. Maximal degree in co-relation 90860. Up to 10756 conditions per place. [2024-06-21 17:23:16,240 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 342 selfloop transitions, 151 changer transitions 0/497 dead transitions. [2024-06-21 17:23:16,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 497 transitions, 10064 flow [2024-06-21 17:23:16,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:23:16,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:23:16,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-21 17:23:16,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-06-21 17:23:16,242 INFO L175 Difference]: Start difference. First operand has 254 places, 470 transitions, 8792 flow. Second operand 9 states and 151 transitions. [2024-06-21 17:23:16,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 497 transitions, 10064 flow [2024-06-21 17:23:17,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 497 transitions, 9867 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-21 17:23:17,902 INFO L231 Difference]: Finished difference. Result has 260 places, 470 transitions, 8904 flow [2024-06-21 17:23:17,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8595, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8904, PETRI_PLACES=260, PETRI_TRANSITIONS=470} [2024-06-21 17:23:17,903 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 217 predicate places. [2024-06-21 17:23:17,903 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 470 transitions, 8904 flow [2024-06-21 17:23:17,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:23:17,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:23:17,904 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] [2024-06-21 17:23:17,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 17:23:17,904 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:23:17,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:23:17,904 INFO L85 PathProgramCache]: Analyzing trace with hash -2123964579, now seen corresponding path program 6 times [2024-06-21 17:23:17,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:23:17,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593867451] [2024-06-21 17:23:17,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:23:17,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:23:17,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:23:20,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:23:20,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:23:20,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593867451] [2024-06-21 17:23:20,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593867451] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:23:20,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:23:20,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:23:20,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38314573] [2024-06-21 17:23:20,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:23:20,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:23:20,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:23:20,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:23:20,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:23:20,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:23:20,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 470 transitions, 8904 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:23:20,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:23:20,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:23:20,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:23:24,210 INFO L124 PetriNetUnfolderBase]: 7415/11743 cut-off events. [2024-06-21 17:23:24,210 INFO L125 PetriNetUnfolderBase]: For 742140/742142 co-relation queries the response was YES. [2024-06-21 17:23:24,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90823 conditions, 11743 events. 7415/11743 cut-off events. For 742140/742142 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 77798 event pairs, 2876 based on Foata normal form. 6/11735 useless extension candidates. Maximal degree in co-relation 90701. Up to 11109 conditions per place. [2024-06-21 17:23:24,365 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 387 selfloop transitions, 99 changer transitions 3/493 dead transitions. [2024-06-21 17:23:24,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 493 transitions, 9948 flow [2024-06-21 17:23:24,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:23:24,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:23:24,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-21 17:23:24,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37566137566137564 [2024-06-21 17:23:24,367 INFO L175 Difference]: Start difference. First operand has 260 places, 470 transitions, 8904 flow. Second operand 9 states and 142 transitions. [2024-06-21 17:23:24,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 493 transitions, 9948 flow [2024-06-21 17:23:26,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 493 transitions, 9592 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-21 17:23:26,392 INFO L231 Difference]: Finished difference. Result has 262 places, 468 transitions, 8704 flow [2024-06-21 17:23:26,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8548, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8704, PETRI_PLACES=262, PETRI_TRANSITIONS=468} [2024-06-21 17:23:26,393 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 219 predicate places. [2024-06-21 17:23:26,393 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 468 transitions, 8704 flow [2024-06-21 17:23:26,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:23:26,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:23:26,394 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:23:26,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 17:23:26,394 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:23:26,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:23:26,395 INFO L85 PathProgramCache]: Analyzing trace with hash 398258321, now seen corresponding path program 7 times [2024-06-21 17:23:26,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:23:26,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572349037] [2024-06-21 17:23:26,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:23:26,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:23:26,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:23:29,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:23:29,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:23:29,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572349037] [2024-06-21 17:23:29,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572349037] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:23:29,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:23:29,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:23:29,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206007948] [2024-06-21 17:23:29,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:23:29,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:23:29,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:23:29,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:23:29,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:23:29,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:23:29,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 468 transitions, 8704 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:23:29,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:23:29,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:23:29,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:23:32,275 INFO L124 PetriNetUnfolderBase]: 7349/11623 cut-off events. [2024-06-21 17:23:32,275 INFO L125 PetriNetUnfolderBase]: For 759185/759187 co-relation queries the response was YES. [2024-06-21 17:23:32,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89660 conditions, 11623 events. 7349/11623 cut-off events. For 759185/759187 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 76892 event pairs, 2840 based on Foata normal form. 6/11615 useless extension candidates. Maximal degree in co-relation 89537. Up to 10893 conditions per place. [2024-06-21 17:23:32,432 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 373 selfloop transitions, 118 changer transitions 3/498 dead transitions. [2024-06-21 17:23:32,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 498 transitions, 9784 flow [2024-06-21 17:23:32,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:23:32,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:23:32,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-21 17:23:32,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-21 17:23:32,433 INFO L175 Difference]: Start difference. First operand has 262 places, 468 transitions, 8704 flow. Second operand 8 states and 139 transitions. [2024-06-21 17:23:32,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 498 transitions, 9784 flow [2024-06-21 17:23:34,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 498 transitions, 9545 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-21 17:23:34,770 INFO L231 Difference]: Finished difference. Result has 264 places, 466 transitions, 8676 flow [2024-06-21 17:23:34,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8465, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8676, PETRI_PLACES=264, PETRI_TRANSITIONS=466} [2024-06-21 17:23:34,770 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 221 predicate places. [2024-06-21 17:23:34,771 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 466 transitions, 8676 flow [2024-06-21 17:23:34,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:23:34,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:23:34,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:23:34,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 17:23:34,771 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:23:34,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:23:34,772 INFO L85 PathProgramCache]: Analyzing trace with hash 99610369, now seen corresponding path program 8 times [2024-06-21 17:23:34,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:23:34,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074636030] [2024-06-21 17:23:34,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:23:34,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:23:34,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:23:37,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:23:37,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:23:37,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074636030] [2024-06-21 17:23:37,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074636030] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:23:37,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:23:37,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:23:37,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449018344] [2024-06-21 17:23:37,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:23:37,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:23:37,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:23:37,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:23:37,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:23:37,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:23:37,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 466 transitions, 8676 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:23:37,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:23:37,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:23:37,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:23:41,100 INFO L124 PetriNetUnfolderBase]: 7303/11551 cut-off events. [2024-06-21 17:23:41,100 INFO L125 PetriNetUnfolderBase]: For 782601/782603 co-relation queries the response was YES. [2024-06-21 17:23:41,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89957 conditions, 11551 events. 7303/11551 cut-off events. For 782601/782603 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 76116 event pairs, 1968 based on Foata normal form. 6/11543 useless extension candidates. Maximal degree in co-relation 89833. Up to 8925 conditions per place. [2024-06-21 17:23:41,226 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 190 selfloop transitions, 319 changer transitions 0/513 dead transitions. [2024-06-21 17:23:41,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 513 transitions, 10319 flow [2024-06-21 17:23:41,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:23:41,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:23:41,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-21 17:23:41,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 17:23:41,228 INFO L175 Difference]: Start difference. First operand has 264 places, 466 transitions, 8676 flow. Second operand 9 states and 168 transitions. [2024-06-21 17:23:41,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 513 transitions, 10319 flow [2024-06-21 17:23:42,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 513 transitions, 10027 flow, removed 11 selfloop flow, removed 10 redundant places. [2024-06-21 17:23:43,000 INFO L231 Difference]: Finished difference. Result has 264 places, 474 transitions, 9300 flow [2024-06-21 17:23:43,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8396, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=311, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9300, PETRI_PLACES=264, PETRI_TRANSITIONS=474} [2024-06-21 17:23:43,001 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 221 predicate places. [2024-06-21 17:23:43,001 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 474 transitions, 9300 flow [2024-06-21 17:23:43,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:23:43,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:23:43,001 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:23:43,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 17:23:43,001 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:23:43,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:23:43,002 INFO L85 PathProgramCache]: Analyzing trace with hash 329890103, now seen corresponding path program 9 times [2024-06-21 17:23:43,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:23:43,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241138] [2024-06-21 17:23:43,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:23:43,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:23:43,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:23:45,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:23:45,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:23:45,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241138] [2024-06-21 17:23:45,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241138] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:23:45,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:23:45,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:23:45,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720299005] [2024-06-21 17:23:45,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:23:45,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:23:45,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:23:45,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:23:45,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:23:45,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:23:45,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 474 transitions, 9300 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:23:45,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:23:45,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:23:45,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:23:49,039 INFO L124 PetriNetUnfolderBase]: 7313/11616 cut-off events. [2024-06-21 17:23:49,039 INFO L125 PetriNetUnfolderBase]: For 762829/762851 co-relation queries the response was YES. [2024-06-21 17:23:49,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91754 conditions, 11616 events. 7313/11616 cut-off events. For 762829/762851 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 77038 event pairs, 2060 based on Foata normal form. 11/11608 useless extension candidates. Maximal degree in co-relation 91630. Up to 8927 conditions per place. [2024-06-21 17:23:49,201 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 220 selfloop transitions, 279 changer transitions 0/503 dead transitions. [2024-06-21 17:23:49,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 503 transitions, 10757 flow [2024-06-21 17:23:49,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:23:49,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:23:49,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-21 17:23:49,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-21 17:23:49,203 INFO L175 Difference]: Start difference. First operand has 264 places, 474 transitions, 9300 flow. Second operand 8 states and 139 transitions. [2024-06-21 17:23:49,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 503 transitions, 10757 flow [2024-06-21 17:23:51,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 503 transitions, 10425 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-21 17:23:51,543 INFO L231 Difference]: Finished difference. Result has 268 places, 477 transitions, 9593 flow [2024-06-21 17:23:51,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8969, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=276, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9593, PETRI_PLACES=268, PETRI_TRANSITIONS=477} [2024-06-21 17:23:51,544 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 225 predicate places. [2024-06-21 17:23:51,544 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 477 transitions, 9593 flow [2024-06-21 17:23:51,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:23:51,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:23:51,544 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:23:51,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 17:23:51,545 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:23:51,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:23:51,545 INFO L85 PathProgramCache]: Analyzing trace with hash 324176183, now seen corresponding path program 10 times [2024-06-21 17:23:51,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:23:51,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379770519] [2024-06-21 17:23:51,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:23:51,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:23:51,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:23:54,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:23:54,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:23:54,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379770519] [2024-06-21 17:23:54,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379770519] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:23:54,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:23:54,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:23:54,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333654675] [2024-06-21 17:23:54,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:23:54,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:23:54,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:23:54,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:23:54,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:23:54,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:23:54,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 477 transitions, 9593 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:23:54,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:23:54,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:23:54,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:23:57,815 INFO L124 PetriNetUnfolderBase]: 7297/11586 cut-off events. [2024-06-21 17:23:57,815 INFO L125 PetriNetUnfolderBase]: For 791285/791307 co-relation queries the response was YES. [2024-06-21 17:23:57,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91998 conditions, 11586 events. 7297/11586 cut-off events. For 791285/791307 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 76764 event pairs, 2073 based on Foata normal form. 13/11580 useless extension candidates. Maximal degree in co-relation 91873. Up to 8920 conditions per place. [2024-06-21 17:23:57,966 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 233 selfloop transitions, 266 changer transitions 0/503 dead transitions. [2024-06-21 17:23:57,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 503 transitions, 10883 flow [2024-06-21 17:23:57,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:23:57,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:23:57,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-21 17:23:57,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-21 17:23:57,968 INFO L175 Difference]: Start difference. First operand has 268 places, 477 transitions, 9593 flow. Second operand 8 states and 141 transitions. [2024-06-21 17:23:57,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 503 transitions, 10883 flow [2024-06-21 17:24:00,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 503 transitions, 10452 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-21 17:24:00,362 INFO L231 Difference]: Finished difference. Result has 272 places, 477 transitions, 9702 flow [2024-06-21 17:24:00,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9162, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=266, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9702, PETRI_PLACES=272, PETRI_TRANSITIONS=477} [2024-06-21 17:24:00,363 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 229 predicate places. [2024-06-21 17:24:00,363 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 477 transitions, 9702 flow [2024-06-21 17:24:00,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:24:00,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:24:00,363 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:24:00,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 17:24:00,364 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:24:00,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:24:00,364 INFO L85 PathProgramCache]: Analyzing trace with hash 101810207, now seen corresponding path program 6 times [2024-06-21 17:24:00,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:24:00,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083987145] [2024-06-21 17:24:00,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:24:00,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:24:00,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:24:03,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:24:03,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:24:03,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083987145] [2024-06-21 17:24:03,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083987145] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:24:03,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:24:03,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:24:03,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119973276] [2024-06-21 17:24:03,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:24:03,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:24:03,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:24:03,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:24:03,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:24:03,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:24:03,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 477 transitions, 9702 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:24:03,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:24:03,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:24:03,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:24:06,600 INFO L124 PetriNetUnfolderBase]: 7279/11518 cut-off events. [2024-06-21 17:24:06,600 INFO L125 PetriNetUnfolderBase]: For 815837/815839 co-relation queries the response was YES. [2024-06-21 17:24:06,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91945 conditions, 11518 events. 7279/11518 cut-off events. For 815837/815839 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 75924 event pairs, 1964 based on Foata normal form. 6/11510 useless extension candidates. Maximal degree in co-relation 91819. Up to 8915 conditions per place. [2024-06-21 17:24:06,747 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 190 selfloop transitions, 326 changer transitions 0/520 dead transitions. [2024-06-21 17:24:06,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 520 transitions, 11204 flow [2024-06-21 17:24:06,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:24:06,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:24:06,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-21 17:24:06,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455026455026455 [2024-06-21 17:24:06,748 INFO L175 Difference]: Start difference. First operand has 272 places, 477 transitions, 9702 flow. Second operand 9 states and 172 transitions. [2024-06-21 17:24:06,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 520 transitions, 11204 flow [2024-06-21 17:24:08,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 520 transitions, 10588 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-06-21 17:24:08,627 INFO L231 Difference]: Finished difference. Result has 274 places, 477 transitions, 9754 flow [2024-06-21 17:24:08,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9086, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=326, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9754, PETRI_PLACES=274, PETRI_TRANSITIONS=477} [2024-06-21 17:24:08,628 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 231 predicate places. [2024-06-21 17:24:08,628 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 477 transitions, 9754 flow [2024-06-21 17:24:08,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:24:08,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:24:08,629 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:24:08,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 17:24:08,629 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:24:08,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:24:08,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1591464773, now seen corresponding path program 11 times [2024-06-21 17:24:08,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:24:08,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046616373] [2024-06-21 17:24:08,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:24:08,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:24:08,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:24:11,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:24:11,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:24:11,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046616373] [2024-06-21 17:24:11,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046616373] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:24:11,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:24:11,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:24:11,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897715634] [2024-06-21 17:24:11,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:24:11,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:24:11,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:24:11,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:24:11,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:24:11,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:24:11,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 477 transitions, 9754 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:24:11,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:24:11,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:24:11,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:24:14,891 INFO L124 PetriNetUnfolderBase]: 7235/11493 cut-off events. [2024-06-21 17:24:14,891 INFO L125 PetriNetUnfolderBase]: For 826611/826642 co-relation queries the response was YES. [2024-06-21 17:24:14,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91419 conditions, 11493 events. 7235/11493 cut-off events. For 826611/826642 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 76070 event pairs, 2769 based on Foata normal form. 26/11501 useless extension candidates. Maximal degree in co-relation 91292. Up to 10528 conditions per place. [2024-06-21 17:24:15,045 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 385 selfloop transitions, 113 changer transitions 1/503 dead transitions. [2024-06-21 17:24:15,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 503 transitions, 10976 flow [2024-06-21 17:24:15,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:24:15,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:24:15,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 169 transitions. [2024-06-21 17:24:15,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3658008658008658 [2024-06-21 17:24:15,047 INFO L175 Difference]: Start difference. First operand has 274 places, 477 transitions, 9754 flow. Second operand 11 states and 169 transitions. [2024-06-21 17:24:15,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 503 transitions, 10976 flow [2024-06-21 17:24:17,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 503 transitions, 10191 flow, removed 6 selfloop flow, removed 11 redundant places. [2024-06-21 17:24:17,449 INFO L231 Difference]: Finished difference. Result has 275 places, 478 transitions, 9228 flow [2024-06-21 17:24:17,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8977, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9228, PETRI_PLACES=275, PETRI_TRANSITIONS=478} [2024-06-21 17:24:17,449 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 232 predicate places. [2024-06-21 17:24:17,449 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 478 transitions, 9228 flow [2024-06-21 17:24:17,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:24:17,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:24:17,450 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] [2024-06-21 17:24:17,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 17:24:17,450 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:24:17,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:24:17,450 INFO L85 PathProgramCache]: Analyzing trace with hash 225827319, now seen corresponding path program 12 times [2024-06-21 17:24:17,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:24:17,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202340810] [2024-06-21 17:24:17,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:24:17,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:24:17,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:24:20,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:24:20,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:24:20,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202340810] [2024-06-21 17:24:20,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202340810] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:24:20,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:24:20,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:24:20,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680481756] [2024-06-21 17:24:20,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:24:20,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:24:20,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:24:20,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:24:20,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:24:20,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:24:20,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 478 transitions, 9228 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:24:20,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:24:20,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:24:20,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:24:23,306 INFO L124 PetriNetUnfolderBase]: 6983/11029 cut-off events. [2024-06-21 17:24:23,306 INFO L125 PetriNetUnfolderBase]: For 748802/748813 co-relation queries the response was YES. [2024-06-21 17:24:23,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86398 conditions, 11029 events. 6983/11029 cut-off events. For 748802/748813 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 72224 event pairs, 2432 based on Foata normal form. 11/11036 useless extension candidates. Maximal degree in co-relation 86271. Up to 9121 conditions per place. [2024-06-21 17:24:23,458 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 283 selfloop transitions, 213 changer transitions 6/506 dead transitions. [2024-06-21 17:24:23,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 506 transitions, 10310 flow [2024-06-21 17:24:23,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:24:23,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:24:23,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-21 17:24:23,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-21 17:24:23,460 INFO L175 Difference]: Start difference. First operand has 275 places, 478 transitions, 9228 flow. Second operand 8 states and 141 transitions. [2024-06-21 17:24:23,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 506 transitions, 10310 flow [2024-06-21 17:24:26,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 506 transitions, 9973 flow, removed 45 selfloop flow, removed 11 redundant places. [2024-06-21 17:24:26,126 INFO L231 Difference]: Finished difference. Result has 272 places, 473 transitions, 9229 flow [2024-06-21 17:24:26,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8891, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=213, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9229, PETRI_PLACES=272, PETRI_TRANSITIONS=473} [2024-06-21 17:24:26,127 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 229 predicate places. [2024-06-21 17:24:26,127 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 473 transitions, 9229 flow [2024-06-21 17:24:26,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:24:26,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:24:26,127 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:24:26,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 17:24:26,127 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:24:26,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:24:26,128 INFO L85 PathProgramCache]: Analyzing trace with hash 324185111, now seen corresponding path program 2 times [2024-06-21 17:24:26,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:24:26,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84357274] [2024-06-21 17:24:26,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:24:26,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:24:26,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:24:29,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:24:29,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:24:29,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84357274] [2024-06-21 17:24:29,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84357274] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:24:29,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:24:29,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:24:29,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457935868] [2024-06-21 17:24:29,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:24:29,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:24:29,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:24:29,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:24:29,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:24:29,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:24:29,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 473 transitions, 9229 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:24:29,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:24:29,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:24:29,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:24:32,509 INFO L124 PetriNetUnfolderBase]: 6327/9963 cut-off events. [2024-06-21 17:24:32,509 INFO L125 PetriNetUnfolderBase]: For 760739/760757 co-relation queries the response was YES. [2024-06-21 17:24:32,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82343 conditions, 9963 events. 6327/9963 cut-off events. For 760739/760757 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 63494 event pairs, 2255 based on Foata normal form. 14/9970 useless extension candidates. Maximal degree in co-relation 82223. Up to 9606 conditions per place. [2024-06-21 17:24:32,628 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 456 selfloop transitions, 31 changer transitions 0/491 dead transitions. [2024-06-21 17:24:32,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 491 transitions, 10312 flow [2024-06-21 17:24:32,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:24:32,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:24:32,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 106 transitions. [2024-06-21 17:24:32,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36054421768707484 [2024-06-21 17:24:32,629 INFO L175 Difference]: Start difference. First operand has 272 places, 473 transitions, 9229 flow. Second operand 7 states and 106 transitions. [2024-06-21 17:24:32,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 491 transitions, 10312 flow [2024-06-21 17:24:34,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 491 transitions, 9679 flow, removed 11 selfloop flow, removed 10 redundant places. [2024-06-21 17:24:34,543 INFO L231 Difference]: Finished difference. Result has 269 places, 475 transitions, 8725 flow [2024-06-21 17:24:34,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8596, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=442, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8725, PETRI_PLACES=269, PETRI_TRANSITIONS=475} [2024-06-21 17:24:34,543 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 226 predicate places. [2024-06-21 17:24:34,543 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 475 transitions, 8725 flow [2024-06-21 17:24:34,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:24:34,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:24:34,543 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:24:34,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 17:24:34,544 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:24:34,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:24:34,544 INFO L85 PathProgramCache]: Analyzing trace with hash 338469911, now seen corresponding path program 3 times [2024-06-21 17:24:34,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:24:34,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232479352] [2024-06-21 17:24:34,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:24:34,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:24:34,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:24:38,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:24:38,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:24:38,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232479352] [2024-06-21 17:24:38,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232479352] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:24:38,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:24:38,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:24:38,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67153661] [2024-06-21 17:24:38,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:24:38,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:24:38,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:24:38,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:24:38,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:24:38,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:24:38,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 475 transitions, 8725 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:24:38,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:24:38,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:24:38,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:24:40,990 INFO L124 PetriNetUnfolderBase]: 6322/9956 cut-off events. [2024-06-21 17:24:40,990 INFO L125 PetriNetUnfolderBase]: For 748016/748034 co-relation queries the response was YES. [2024-06-21 17:24:41,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80360 conditions, 9956 events. 6322/9956 cut-off events. For 748016/748034 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 63514 event pairs, 2232 based on Foata normal form. 14/9963 useless extension candidates. Maximal degree in co-relation 80241. Up to 9568 conditions per place. [2024-06-21 17:24:41,135 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 454 selfloop transitions, 38 changer transitions 0/496 dead transitions. [2024-06-21 17:24:41,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 496 transitions, 9994 flow [2024-06-21 17:24:41,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:24:41,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:24:41,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 107 transitions. [2024-06-21 17:24:41,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36394557823129253 [2024-06-21 17:24:41,136 INFO L175 Difference]: Start difference. First operand has 269 places, 475 transitions, 8725 flow. Second operand 7 states and 107 transitions. [2024-06-21 17:24:41,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 496 transitions, 9994 flow [2024-06-21 17:24:43,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 496 transitions, 9881 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-21 17:24:43,048 INFO L231 Difference]: Finished difference. Result has 272 places, 479 transitions, 8830 flow [2024-06-21 17:24:43,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8612, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8830, PETRI_PLACES=272, PETRI_TRANSITIONS=479} [2024-06-21 17:24:43,048 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 229 predicate places. [2024-06-21 17:24:43,048 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 479 transitions, 8830 flow [2024-06-21 17:24:43,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:24:43,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:24:43,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:24:43,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 17:24:43,049 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:24:43,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:24:43,049 INFO L85 PathProgramCache]: Analyzing trace with hash -75312199, now seen corresponding path program 4 times [2024-06-21 17:24:43,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:24:43,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28050988] [2024-06-21 17:24:43,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:24:43,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:24:43,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:24:46,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:24:46,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:24:46,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28050988] [2024-06-21 17:24:46,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28050988] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:24:46,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:24:46,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:24:46,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282215750] [2024-06-21 17:24:46,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:24:46,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:24:46,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:24:46,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:24:46,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:24:46,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:24:46,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 479 transitions, 8830 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:24:46,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:24:46,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:24:46,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:24:49,577 INFO L124 PetriNetUnfolderBase]: 6317/9937 cut-off events. [2024-06-21 17:24:49,577 INFO L125 PetriNetUnfolderBase]: For 769388/769394 co-relation queries the response was YES. [2024-06-21 17:24:49,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80672 conditions, 9937 events. 6317/9937 cut-off events. For 769388/769394 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 63291 event pairs, 2316 based on Foata normal form. 8/9942 useless extension candidates. Maximal degree in co-relation 80551. Up to 9598 conditions per place. [2024-06-21 17:24:49,698 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 468 selfloop transitions, 29 changer transitions 0/501 dead transitions. [2024-06-21 17:24:49,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 501 transitions, 9895 flow [2024-06-21 17:24:49,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:24:49,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:24:49,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-21 17:24:49,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-21 17:24:49,700 INFO L175 Difference]: Start difference. First operand has 272 places, 479 transitions, 8830 flow. Second operand 7 states and 112 transitions. [2024-06-21 17:24:49,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 501 transitions, 9895 flow [2024-06-21 17:24:51,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 501 transitions, 9762 flow, removed 50 selfloop flow, removed 3 redundant places. [2024-06-21 17:24:51,623 INFO L231 Difference]: Finished difference. Result has 276 places, 479 transitions, 8764 flow [2024-06-21 17:24:51,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8697, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8764, PETRI_PLACES=276, PETRI_TRANSITIONS=479} [2024-06-21 17:24:51,624 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 233 predicate places. [2024-06-21 17:24:51,624 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 479 transitions, 8764 flow [2024-06-21 17:24:51,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:24:51,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:24:51,624 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:24:51,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 17:24:51,625 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:24:51,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:24:51,625 INFO L85 PathProgramCache]: Analyzing trace with hash 1931771891, now seen corresponding path program 1 times [2024-06-21 17:24:51,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:24:51,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428567726] [2024-06-21 17:24:51,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:24:51,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:24:51,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:24:54,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:24:54,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:24:54,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428567726] [2024-06-21 17:24:54,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428567726] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:24:54,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:24:54,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:24:54,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914383710] [2024-06-21 17:24:54,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:24:54,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:24:54,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:24:54,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:24:54,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:24:54,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:24:54,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 479 transitions, 8764 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:24:54,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:24:54,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:24:54,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:24:57,571 INFO L124 PetriNetUnfolderBase]: 6397/10064 cut-off events. [2024-06-21 17:24:57,572 INFO L125 PetriNetUnfolderBase]: For 814250/814254 co-relation queries the response was YES. [2024-06-21 17:24:57,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82343 conditions, 10064 events. 6397/10064 cut-off events. For 814250/814254 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 64122 event pairs, 2359 based on Foata normal form. 3/10064 useless extension candidates. Maximal degree in co-relation 82220. Up to 9485 conditions per place. [2024-06-21 17:24:57,699 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 468 selfloop transitions, 48 changer transitions 0/520 dead transitions. [2024-06-21 17:24:57,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 520 transitions, 10146 flow [2024-06-21 17:24:57,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:24:57,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:24:57,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-21 17:24:57,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-21 17:24:57,700 INFO L175 Difference]: Start difference. First operand has 276 places, 479 transitions, 8764 flow. Second operand 8 states and 143 transitions. [2024-06-21 17:24:57,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 520 transitions, 10146 flow [2024-06-21 17:24:59,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 520 transitions, 10080 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-21 17:24:59,404 INFO L231 Difference]: Finished difference. Result has 278 places, 483 transitions, 8911 flow [2024-06-21 17:24:59,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8698, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8911, PETRI_PLACES=278, PETRI_TRANSITIONS=483} [2024-06-21 17:24:59,405 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 235 predicate places. [2024-06-21 17:24:59,405 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 483 transitions, 8911 flow [2024-06-21 17:24:59,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:24:59,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:24:59,406 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:24:59,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 17:24:59,406 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:24:59,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:24:59,407 INFO L85 PathProgramCache]: Analyzing trace with hash 2053160929, now seen corresponding path program 2 times [2024-06-21 17:24:59,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:24:59,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217366209] [2024-06-21 17:24:59,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:24:59,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:24:59,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:25:02,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:25:02,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:25:02,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217366209] [2024-06-21 17:25:02,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217366209] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:25:02,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:25:02,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:25:02,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739790771] [2024-06-21 17:25:02,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:25:02,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:25:02,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:25:02,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:25:02,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:25:02,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:25:02,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 483 transitions, 8911 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:25:02,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:25:02,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:25:02,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:25:05,332 INFO L124 PetriNetUnfolderBase]: 6405/10076 cut-off events. [2024-06-21 17:25:05,333 INFO L125 PetriNetUnfolderBase]: For 839559/839563 co-relation queries the response was YES. [2024-06-21 17:25:05,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83132 conditions, 10076 events. 6405/10076 cut-off events. For 839559/839563 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 64185 event pairs, 2401 based on Foata normal form. 3/10076 useless extension candidates. Maximal degree in co-relation 83008. Up to 9622 conditions per place. [2024-06-21 17:25:05,456 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 463 selfloop transitions, 45 changer transitions 0/512 dead transitions. [2024-06-21 17:25:05,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 512 transitions, 10059 flow [2024-06-21 17:25:05,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:25:05,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:25:05,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-21 17:25:05,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-21 17:25:05,457 INFO L175 Difference]: Start difference. First operand has 278 places, 483 transitions, 8911 flow. Second operand 8 states and 133 transitions. [2024-06-21 17:25:05,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 512 transitions, 10059 flow [2024-06-21 17:25:07,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 512 transitions, 9946 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-21 17:25:07,071 INFO L231 Difference]: Finished difference. Result has 282 places, 485 transitions, 8955 flow [2024-06-21 17:25:07,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8802, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=483, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8955, PETRI_PLACES=282, PETRI_TRANSITIONS=485} [2024-06-21 17:25:07,072 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 239 predicate places. [2024-06-21 17:25:07,072 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 485 transitions, 8955 flow [2024-06-21 17:25:07,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:25:07,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:25:07,073 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:25:07,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 17:25:07,073 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:25:07,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:25:07,073 INFO L85 PathProgramCache]: Analyzing trace with hash -2123718687, now seen corresponding path program 3 times [2024-06-21 17:25:07,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:25:07,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234843255] [2024-06-21 17:25:07,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:25:07,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:25:07,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:25:10,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:25:10,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:25:10,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234843255] [2024-06-21 17:25:10,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234843255] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:25:10,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:25:10,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:25:10,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226671195] [2024-06-21 17:25:10,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:25:10,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:25:10,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:25:10,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:25:10,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:25:10,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:25:10,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 485 transitions, 8955 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:25:10,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:25:10,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:25:10,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:25:13,520 INFO L124 PetriNetUnfolderBase]: 6457/10162 cut-off events. [2024-06-21 17:25:13,520 INFO L125 PetriNetUnfolderBase]: For 889550/889554 co-relation queries the response was YES. [2024-06-21 17:25:13,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84172 conditions, 10162 events. 6457/10162 cut-off events. For 889550/889554 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 65038 event pairs, 2551 based on Foata normal form. 15/10174 useless extension candidates. Maximal degree in co-relation 84046. Up to 9758 conditions per place. [2024-06-21 17:25:13,632 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 484 selfloop transitions, 26 changer transitions 0/514 dead transitions. [2024-06-21 17:25:13,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 514 transitions, 10125 flow [2024-06-21 17:25:13,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:25:13,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:25:13,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-21 17:25:13,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37037037037037035 [2024-06-21 17:25:13,633 INFO L175 Difference]: Start difference. First operand has 282 places, 485 transitions, 8955 flow. Second operand 9 states and 140 transitions. [2024-06-21 17:25:13,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 514 transitions, 10125 flow [2024-06-21 17:25:15,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 514 transitions, 9992 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-21 17:25:15,285 INFO L231 Difference]: Finished difference. Result has 285 places, 487 transitions, 8942 flow [2024-06-21 17:25:15,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8822, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8942, PETRI_PLACES=285, PETRI_TRANSITIONS=487} [2024-06-21 17:25:15,286 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 242 predicate places. [2024-06-21 17:25:15,286 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 487 transitions, 8942 flow [2024-06-21 17:25:15,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:25:15,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:25:15,286 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:25:15,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 17:25:15,286 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:25:15,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:25:15,286 INFO L85 PathProgramCache]: Analyzing trace with hash -2123533989, now seen corresponding path program 1 times [2024-06-21 17:25:15,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:25:15,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604062543] [2024-06-21 17:25:15,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:25:15,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:25:15,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:25:18,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:25:18,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:25:18,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604062543] [2024-06-21 17:25:18,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604062543] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:25:18,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:25:18,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:25:18,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661259096] [2024-06-21 17:25:18,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:25:18,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:25:18,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:25:18,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:25:18,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:25:18,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:25:18,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 487 transitions, 8942 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:25:18,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:25:18,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:25:18,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:25:21,844 INFO L124 PetriNetUnfolderBase]: 6509/10242 cut-off events. [2024-06-21 17:25:21,844 INFO L125 PetriNetUnfolderBase]: For 916044/916048 co-relation queries the response was YES. [2024-06-21 17:25:21,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84929 conditions, 10242 events. 6509/10242 cut-off events. For 916044/916048 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 65595 event pairs, 2559 based on Foata normal form. 15/10254 useless extension candidates. Maximal degree in co-relation 84802. Up to 9838 conditions per place. [2024-06-21 17:25:21,977 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 486 selfloop transitions, 26 changer transitions 0/516 dead transitions. [2024-06-21 17:25:21,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 516 transitions, 10094 flow [2024-06-21 17:25:21,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:25:21,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:25:21,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-21 17:25:21,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37037037037037035 [2024-06-21 17:25:21,978 INFO L175 Difference]: Start difference. First operand has 285 places, 487 transitions, 8942 flow. Second operand 9 states and 140 transitions. [2024-06-21 17:25:21,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 516 transitions, 10094 flow [2024-06-21 17:25:23,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 516 transitions, 10018 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-21 17:25:23,896 INFO L231 Difference]: Finished difference. Result has 289 places, 489 transitions, 8964 flow [2024-06-21 17:25:23,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8866, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=461, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8964, PETRI_PLACES=289, PETRI_TRANSITIONS=489} [2024-06-21 17:25:23,896 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 246 predicate places. [2024-06-21 17:25:23,896 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 489 transitions, 8964 flow [2024-06-21 17:25:23,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:25:23,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:25:23,897 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:25:23,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 17:25:23,897 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:25:23,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:25:23,897 INFO L85 PathProgramCache]: Analyzing trace with hash 101819135, now seen corresponding path program 4 times [2024-06-21 17:25:23,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:25:23,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531005075] [2024-06-21 17:25:23,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:25:23,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:25:23,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:25:27,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:25:27,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:25:27,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531005075] [2024-06-21 17:25:27,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531005075] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:25:27,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:25:27,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:25:27,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024335318] [2024-06-21 17:25:27,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:25:27,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:25:27,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:25:27,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:25:27,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:25:27,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:25:27,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 489 transitions, 8964 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:25:27,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:25:27,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:25:27,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:25:30,173 INFO L124 PetriNetUnfolderBase]: 6476/10189 cut-off events. [2024-06-21 17:25:30,173 INFO L125 PetriNetUnfolderBase]: For 914084/914088 co-relation queries the response was YES. [2024-06-21 17:25:30,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84158 conditions, 10189 events. 6476/10189 cut-off events. For 914084/914088 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 65086 event pairs, 2360 based on Foata normal form. 15/10201 useless extension candidates. Maximal degree in co-relation 84030. Up to 9627 conditions per place. [2024-06-21 17:25:30,310 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 475 selfloop transitions, 46 changer transitions 0/525 dead transitions. [2024-06-21 17:25:30,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 525 transitions, 10128 flow [2024-06-21 17:25:30,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:25:30,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:25:30,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-21 17:25:30,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-06-21 17:25:30,311 INFO L175 Difference]: Start difference. First operand has 289 places, 489 transitions, 8964 flow. Second operand 9 states and 151 transitions. [2024-06-21 17:25:30,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 525 transitions, 10128 flow [2024-06-21 17:25:32,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 525 transitions, 10022 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-21 17:25:32,727 INFO L231 Difference]: Finished difference. Result has 291 places, 489 transitions, 8963 flow [2024-06-21 17:25:32,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8858, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=443, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8963, PETRI_PLACES=291, PETRI_TRANSITIONS=489} [2024-06-21 17:25:32,728 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 248 predicate places. [2024-06-21 17:25:32,728 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 489 transitions, 8963 flow [2024-06-21 17:25:32,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:25:32,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:25:32,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:25:32,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 17:25:32,728 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:25:32,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:25:32,729 INFO L85 PathProgramCache]: Analyzing trace with hash 102003833, now seen corresponding path program 2 times [2024-06-21 17:25:32,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:25:32,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141102664] [2024-06-21 17:25:32,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:25:32,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:25:32,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:25:36,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:25:36,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:25:36,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141102664] [2024-06-21 17:25:36,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141102664] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:25:36,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:25:36,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:25:36,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475135115] [2024-06-21 17:25:36,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:25:36,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:25:36,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:25:36,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:25:36,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:25:36,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:25:36,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 489 transitions, 8963 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:25:36,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:25:36,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:25:36,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:25:39,342 INFO L124 PetriNetUnfolderBase]: 6528/10269 cut-off events. [2024-06-21 17:25:39,343 INFO L125 PetriNetUnfolderBase]: For 940525/940529 co-relation queries the response was YES. [2024-06-21 17:25:39,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85001 conditions, 10269 events. 6528/10269 cut-off events. For 940525/940529 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 65657 event pairs, 2404 based on Foata normal form. 15/10281 useless extension candidates. Maximal degree in co-relation 84872. Up to 9729 conditions per place. [2024-06-21 17:25:39,457 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 476 selfloop transitions, 43 changer transitions 0/523 dead transitions. [2024-06-21 17:25:39,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 523 transitions, 10149 flow [2024-06-21 17:25:39,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:25:39,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:25:39,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-21 17:25:39,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-21 17:25:39,459 INFO L175 Difference]: Start difference. First operand has 291 places, 489 transitions, 8963 flow. Second operand 9 states and 147 transitions. [2024-06-21 17:25:39,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 523 transitions, 10149 flow [2024-06-21 17:25:41,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 523 transitions, 10048 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-21 17:25:41,362 INFO L231 Difference]: Finished difference. Result has 292 places, 491 transitions, 9002 flow [2024-06-21 17:25:41,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8862, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=446, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9002, PETRI_PLACES=292, PETRI_TRANSITIONS=491} [2024-06-21 17:25:41,362 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 249 predicate places. [2024-06-21 17:25:41,362 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 491 transitions, 9002 flow [2024-06-21 17:25:41,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:25:41,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:25:41,363 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:25:41,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 17:25:41,363 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:25:41,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:25:41,363 INFO L85 PathProgramCache]: Analyzing trace with hash 338179193, now seen corresponding path program 3 times [2024-06-21 17:25:41,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:25:41,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212441329] [2024-06-21 17:25:41,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:25:41,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:25:41,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:25:44,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:25:44,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:25:44,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212441329] [2024-06-21 17:25:44,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212441329] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:25:44,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:25:44,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:25:44,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477806356] [2024-06-21 17:25:44,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:25:44,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:25:44,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:25:44,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:25:44,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:25:44,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:25:44,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 491 transitions, 9002 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:25:44,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:25:44,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:25:44,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:25:47,848 INFO L124 PetriNetUnfolderBase]: 6536/10282 cut-off events. [2024-06-21 17:25:47,849 INFO L125 PetriNetUnfolderBase]: For 916951/916958 co-relation queries the response was YES. [2024-06-21 17:25:47,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85225 conditions, 10282 events. 6536/10282 cut-off events. For 916951/916958 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 65718 event pairs, 2385 based on Foata normal form. 5/10283 useless extension candidates. Maximal degree in co-relation 85095. Up to 9851 conditions per place. [2024-06-21 17:25:47,983 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 471 selfloop transitions, 40 changer transitions 0/515 dead transitions. [2024-06-21 17:25:47,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 515 transitions, 10126 flow [2024-06-21 17:25:47,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:25:47,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:25:47,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-21 17:25:47,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37797619047619047 [2024-06-21 17:25:47,985 INFO L175 Difference]: Start difference. First operand has 292 places, 491 transitions, 9002 flow. Second operand 8 states and 127 transitions. [2024-06-21 17:25:47,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 515 transitions, 10126 flow [2024-06-21 17:25:50,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 515 transitions, 10014 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-21 17:25:50,291 INFO L231 Difference]: Finished difference. Result has 293 places, 493 transitions, 9023 flow [2024-06-21 17:25:50,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8894, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9023, PETRI_PLACES=293, PETRI_TRANSITIONS=493} [2024-06-21 17:25:50,292 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 250 predicate places. [2024-06-21 17:25:50,292 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 493 transitions, 9023 flow [2024-06-21 17:25:50,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:25:50,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:25:50,292 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:25:50,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 17:25:50,293 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:25:50,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:25:50,293 INFO L85 PathProgramCache]: Analyzing trace with hash 338475863, now seen corresponding path program 4 times [2024-06-21 17:25:50,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:25:50,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366678201] [2024-06-21 17:25:50,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:25:50,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:25:50,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:25:53,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:25:53,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:25:53,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366678201] [2024-06-21 17:25:53,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366678201] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:25:53,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:25:53,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:25:53,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098012269] [2024-06-21 17:25:53,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:25:53,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:25:53,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:25:53,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:25:53,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:25:53,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:25:53,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 493 transitions, 9023 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:25:53,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:25:53,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:25:53,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:25:56,537 INFO L124 PetriNetUnfolderBase]: 6531/10275 cut-off events. [2024-06-21 17:25:56,537 INFO L125 PetriNetUnfolderBase]: For 913130/913137 co-relation queries the response was YES. [2024-06-21 17:25:56,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84860 conditions, 10275 events. 6531/10275 cut-off events. For 913130/913137 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 65701 event pairs, 2382 based on Foata normal form. 5/10276 useless extension candidates. Maximal degree in co-relation 84729. Up to 9714 conditions per place. [2024-06-21 17:25:56,672 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 471 selfloop transitions, 47 changer transitions 0/522 dead transitions. [2024-06-21 17:25:56,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 522 transitions, 10195 flow [2024-06-21 17:25:56,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:25:56,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:25:56,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-21 17:25:56,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-21 17:25:56,674 INFO L175 Difference]: Start difference. First operand has 293 places, 493 transitions, 9023 flow. Second operand 8 states and 132 transitions. [2024-06-21 17:25:56,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 522 transitions, 10195 flow [2024-06-21 17:25:59,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 522 transitions, 10082 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-21 17:25:59,066 INFO L231 Difference]: Finished difference. Result has 295 places, 495 transitions, 9057 flow [2024-06-21 17:25:59,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8910, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=446, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9057, PETRI_PLACES=295, PETRI_TRANSITIONS=495} [2024-06-21 17:25:59,067 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 252 predicate places. [2024-06-21 17:25:59,067 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 495 transitions, 9057 flow [2024-06-21 17:25:59,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:25:59,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:25:59,067 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:25:59,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 17:25:59,067 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:25:59,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:25:59,068 INFO L85 PathProgramCache]: Analyzing trace with hash -212161944, now seen corresponding path program 1 times [2024-06-21 17:25:59,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:25:59,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008609655] [2024-06-21 17:25:59,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:25:59,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:25:59,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:26:02,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:26:02,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:26:02,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008609655] [2024-06-21 17:26:02,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008609655] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:26:02,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:26:02,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:26:02,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675774670] [2024-06-21 17:26:02,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:26:02,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:26:02,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:26:02,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:26:02,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:26:02,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:26:02,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 495 transitions, 9057 flow. Second operand has 11 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:26:02,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:26:02,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:26:02,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:26:06,397 INFO L124 PetriNetUnfolderBase]: 7099/11188 cut-off events. [2024-06-21 17:26:06,398 INFO L125 PetriNetUnfolderBase]: For 1120955/1120969 co-relation queries the response was YES. [2024-06-21 17:26:06,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93000 conditions, 11188 events. 7099/11188 cut-off events. For 1120955/1120969 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 72490 event pairs, 2373 based on Foata normal form. 58/11236 useless extension candidates. Maximal degree in co-relation 92868. Up to 9841 conditions per place. [2024-06-21 17:26:06,545 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 461 selfloop transitions, 127 changer transitions 0/592 dead transitions. [2024-06-21 17:26:06,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 592 transitions, 11450 flow [2024-06-21 17:26:06,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 17:26:06,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 17:26:06,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 197 transitions. [2024-06-21 17:26:06,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39087301587301587 [2024-06-21 17:26:06,547 INFO L175 Difference]: Start difference. First operand has 295 places, 495 transitions, 9057 flow. Second operand 12 states and 197 transitions. [2024-06-21 17:26:06,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 592 transitions, 11450 flow [2024-06-21 17:26:09,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 592 transitions, 11317 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-21 17:26:09,460 INFO L231 Difference]: Finished difference. Result has 307 places, 539 transitions, 10205 flow [2024-06-21 17:26:09,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8926, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=495, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=393, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=10205, PETRI_PLACES=307, PETRI_TRANSITIONS=539} [2024-06-21 17:26:09,460 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 264 predicate places. [2024-06-21 17:26:09,460 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 539 transitions, 10205 flow [2024-06-21 17:26:09,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:26:09,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:26:09,461 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:26:09,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 17:26:09,461 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:26:09,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:26:09,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1597899138, now seen corresponding path program 2 times [2024-06-21 17:26:09,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:26:09,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910595904] [2024-06-21 17:26:09,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:26:09,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:26:09,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:26:12,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:26:12,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:26:12,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910595904] [2024-06-21 17:26:12,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910595904] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:26:12,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:26:12,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:26:12,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068373644] [2024-06-21 17:26:12,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:26:12,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:26:12,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:26:12,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:26:12,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:26:12,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:26:12,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 539 transitions, 10205 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:26:12,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:26:12,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:26:12,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:26:16,349 INFO L124 PetriNetUnfolderBase]: 7489/11833 cut-off events. [2024-06-21 17:26:16,349 INFO L125 PetriNetUnfolderBase]: For 1252650/1252665 co-relation queries the response was YES. [2024-06-21 17:26:16,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99937 conditions, 11833 events. 7489/11833 cut-off events. For 1252650/1252665 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 77324 event pairs, 2032 based on Foata normal form. 62/11891 useless extension candidates. Maximal degree in co-relation 99798. Up to 9711 conditions per place. [2024-06-21 17:26:16,526 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 446 selfloop transitions, 143 changer transitions 0/593 dead transitions. [2024-06-21 17:26:16,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 593 transitions, 11812 flow [2024-06-21 17:26:16,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:26:16,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:26:16,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 176 transitions. [2024-06-21 17:26:16,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41904761904761906 [2024-06-21 17:26:16,527 INFO L175 Difference]: Start difference. First operand has 307 places, 539 transitions, 10205 flow. Second operand 10 states and 176 transitions. [2024-06-21 17:26:16,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 593 transitions, 11812 flow [2024-06-21 17:26:20,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 593 transitions, 11731 flow, removed 37 selfloop flow, removed 2 redundant places. [2024-06-21 17:26:20,031 INFO L231 Difference]: Finished difference. Result has 316 places, 543 transitions, 10542 flow [2024-06-21 17:26:20,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10125, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10542, PETRI_PLACES=316, PETRI_TRANSITIONS=543} [2024-06-21 17:26:20,031 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 273 predicate places. [2024-06-21 17:26:20,032 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 543 transitions, 10542 flow [2024-06-21 17:26:20,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:26:20,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:26:20,032 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:26:20,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 17:26:20,032 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:26:20,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:26:20,033 INFO L85 PathProgramCache]: Analyzing trace with hash -1333064720, now seen corresponding path program 3 times [2024-06-21 17:26:20,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:26:20,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249968521] [2024-06-21 17:26:20,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:26:20,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:26:20,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:26:23,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:26:23,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:26:23,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249968521] [2024-06-21 17:26:23,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249968521] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:26:23,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:26:23,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:26:23,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533398854] [2024-06-21 17:26:23,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:26:23,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:26:23,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:26:23,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:26:23,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:26:23,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:26:23,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 543 transitions, 10542 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:26:23,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:26:23,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:26:23,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:26:27,631 INFO L124 PetriNetUnfolderBase]: 7701/12149 cut-off events. [2024-06-21 17:26:27,632 INFO L125 PetriNetUnfolderBase]: For 1334484/1334499 co-relation queries the response was YES. [2024-06-21 17:26:27,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102186 conditions, 12149 events. 7701/12149 cut-off events. For 1334484/1334499 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 79749 event pairs, 2932 based on Foata normal form. 78/12223 useless extension candidates. Maximal degree in co-relation 102044. Up to 11073 conditions per place. [2024-06-21 17:26:27,818 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 438 selfloop transitions, 135 changer transitions 8/585 dead transitions. [2024-06-21 17:26:27,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 585 transitions, 11879 flow [2024-06-21 17:26:27,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:26:27,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:26:27,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 169 transitions. [2024-06-21 17:26:27,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4023809523809524 [2024-06-21 17:26:27,819 INFO L175 Difference]: Start difference. First operand has 316 places, 543 transitions, 10542 flow. Second operand 10 states and 169 transitions. [2024-06-21 17:26:27,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 585 transitions, 11879 flow [2024-06-21 17:26:31,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 585 transitions, 11531 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-21 17:26:31,133 INFO L231 Difference]: Finished difference. Result has 320 places, 541 transitions, 10425 flow [2024-06-21 17:26:31,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10194, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10425, PETRI_PLACES=320, PETRI_TRANSITIONS=541} [2024-06-21 17:26:31,134 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 277 predicate places. [2024-06-21 17:26:31,134 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 541 transitions, 10425 flow [2024-06-21 17:26:31,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:26:31,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:26:31,134 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:26:31,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 17:26:31,135 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:26:31,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:26:31,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1332201858, now seen corresponding path program 4 times [2024-06-21 17:26:31,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:26:31,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500377156] [2024-06-21 17:26:31,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:26:31,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:26:31,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:26:34,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:26:34,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:26:34,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500377156] [2024-06-21 17:26:34,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500377156] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:26:34,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:26:34,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:26:34,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262943891] [2024-06-21 17:26:34,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:26:34,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:26:34,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:26:34,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:26:34,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:26:34,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:26:34,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 541 transitions, 10425 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:26:34,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:26:34,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:26:34,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:26:38,639 INFO L124 PetriNetUnfolderBase]: 7849/12413 cut-off events. [2024-06-21 17:26:38,639 INFO L125 PetriNetUnfolderBase]: For 1314467/1314482 co-relation queries the response was YES. [2024-06-21 17:26:38,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102173 conditions, 12413 events. 7849/12413 cut-off events. For 1314467/1314482 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 82103 event pairs, 2982 based on Foata normal form. 70/12479 useless extension candidates. Maximal degree in co-relation 102030. Up to 11025 conditions per place. [2024-06-21 17:26:38,794 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 440 selfloop transitions, 132 changer transitions 21/597 dead transitions. [2024-06-21 17:26:38,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 597 transitions, 11909 flow [2024-06-21 17:26:38,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:26:38,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:26:38,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 176 transitions. [2024-06-21 17:26:38,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41904761904761906 [2024-06-21 17:26:38,796 INFO L175 Difference]: Start difference. First operand has 320 places, 541 transitions, 10425 flow. Second operand 10 states and 176 transitions. [2024-06-21 17:26:38,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 597 transitions, 11909 flow [2024-06-21 17:26:42,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 597 transitions, 11646 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-21 17:26:42,025 INFO L231 Difference]: Finished difference. Result has 324 places, 537 transitions, 10291 flow [2024-06-21 17:26:42,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10162, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=541, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10291, PETRI_PLACES=324, PETRI_TRANSITIONS=537} [2024-06-21 17:26:42,025 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 281 predicate places. [2024-06-21 17:26:42,025 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 537 transitions, 10291 flow [2024-06-21 17:26:42,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:26:42,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:26:42,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:26:42,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 17:26:42,026 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:26:42,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:26:42,026 INFO L85 PathProgramCache]: Analyzing trace with hash -917852096, now seen corresponding path program 5 times [2024-06-21 17:26:42,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:26:42,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748825504] [2024-06-21 17:26:42,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:26:42,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:26:42,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:26:45,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:26:45,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:26:45,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748825504] [2024-06-21 17:26:45,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748825504] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:26:45,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:26:45,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:26:45,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963509162] [2024-06-21 17:26:45,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:26:45,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:26:45,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:26:45,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:26:45,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:26:45,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:26:45,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 537 transitions, 10291 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:26:45,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:26:45,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:26:45,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:26:49,681 INFO L124 PetriNetUnfolderBase]: 7753/12283 cut-off events. [2024-06-21 17:26:49,681 INFO L125 PetriNetUnfolderBase]: For 1367165/1367170 co-relation queries the response was YES. [2024-06-21 17:26:49,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102309 conditions, 12283 events. 7753/12283 cut-off events. For 1367165/1367170 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 81246 event pairs, 2910 based on Foata normal form. 66/12345 useless extension candidates. Maximal degree in co-relation 102164. Up to 10573 conditions per place. [2024-06-21 17:26:49,854 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 392 selfloop transitions, 163 changer transitions 14/573 dead transitions. [2024-06-21 17:26:49,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 573 transitions, 11583 flow [2024-06-21 17:26:49,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:26:49,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:26:49,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 165 transitions. [2024-06-21 17:26:49,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-21 17:26:49,856 INFO L175 Difference]: Start difference. First operand has 324 places, 537 transitions, 10291 flow. Second operand 10 states and 165 transitions. [2024-06-21 17:26:49,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 573 transitions, 11583 flow [2024-06-21 17:26:52,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 573 transitions, 11313 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-21 17:26:52,486 INFO L231 Difference]: Finished difference. Result has 325 places, 529 transitions, 10159 flow [2024-06-21 17:26:52,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10021, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10159, PETRI_PLACES=325, PETRI_TRANSITIONS=529} [2024-06-21 17:26:52,486 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 282 predicate places. [2024-06-21 17:26:52,486 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 529 transitions, 10159 flow [2024-06-21 17:26:52,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:26:52,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:26:52,487 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:26:52,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 17:26:52,487 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:26:52,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:26:52,488 INFO L85 PathProgramCache]: Analyzing trace with hash 159834652, now seen corresponding path program 6 times [2024-06-21 17:26:52,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:26:52,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563293357] [2024-06-21 17:26:52,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:26:52,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:26:52,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:26:55,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:26:55,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:26:55,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563293357] [2024-06-21 17:26:55,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563293357] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:26:55,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:26:55,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:26:55,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248615168] [2024-06-21 17:26:55,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:26:55,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:26:55,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:26:55,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:26:55,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:26:55,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:26:55,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 529 transitions, 10159 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:26:55,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:26:55,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:26:55,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:27:00,485 INFO L124 PetriNetUnfolderBase]: 7645/12151 cut-off events. [2024-06-21 17:27:00,485 INFO L125 PetriNetUnfolderBase]: For 1402761/1402766 co-relation queries the response was YES. [2024-06-21 17:27:00,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101378 conditions, 12151 events. 7645/12151 cut-off events. For 1402761/1402766 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 80702 event pairs, 2952 based on Foata normal form. 66/12213 useless extension candidates. Maximal degree in co-relation 101232. Up to 10585 conditions per place. [2024-06-21 17:27:00,654 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 381 selfloop transitions, 173 changer transitions 9/567 dead transitions. [2024-06-21 17:27:00,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 567 transitions, 11447 flow [2024-06-21 17:27:00,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:27:00,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:27:00,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 180 transitions. [2024-06-21 17:27:00,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38961038961038963 [2024-06-21 17:27:00,655 INFO L175 Difference]: Start difference. First operand has 325 places, 529 transitions, 10159 flow. Second operand 11 states and 180 transitions. [2024-06-21 17:27:00,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 567 transitions, 11447 flow [2024-06-21 17:27:03,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 567 transitions, 11096 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-21 17:27:03,206 INFO L231 Difference]: Finished difference. Result has 327 places, 526 transitions, 10107 flow [2024-06-21 17:27:03,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9808, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10107, PETRI_PLACES=327, PETRI_TRANSITIONS=526} [2024-06-21 17:27:03,207 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 284 predicate places. [2024-06-21 17:27:03,207 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 526 transitions, 10107 flow [2024-06-21 17:27:03,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:27:03,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:27:03,208 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:27:03,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 17:27:03,208 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:27:03,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:27:03,208 INFO L85 PathProgramCache]: Analyzing trace with hash -928903286, now seen corresponding path program 7 times [2024-06-21 17:27:03,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:27:03,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746720624] [2024-06-21 17:27:03,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:27:03,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:27:03,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:27:06,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:27:06,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:27:06,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746720624] [2024-06-21 17:27:06,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746720624] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:27:06,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:27:06,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:27:06,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852260635] [2024-06-21 17:27:06,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:27:06,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:27:06,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:27:06,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:27:06,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:27:06,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:27:06,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 526 transitions, 10107 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:27:06,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:27:06,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:27:06,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:27:11,671 INFO L124 PetriNetUnfolderBase]: 7821/12439 cut-off events. [2024-06-21 17:27:11,671 INFO L125 PetriNetUnfolderBase]: For 1418971/1418976 co-relation queries the response was YES. [2024-06-21 17:27:11,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102486 conditions, 12439 events. 7821/12439 cut-off events. For 1418971/1418976 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 83041 event pairs, 3004 based on Foata normal form. 58/12493 useless extension candidates. Maximal degree in co-relation 102340. Up to 10501 conditions per place. [2024-06-21 17:27:11,823 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 382 selfloop transitions, 154 changer transitions 36/576 dead transitions. [2024-06-21 17:27:11,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 576 transitions, 11519 flow [2024-06-21 17:27:11,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:27:11,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:27:11,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 184 transitions. [2024-06-21 17:27:11,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39826839826839827 [2024-06-21 17:27:11,825 INFO L175 Difference]: Start difference. First operand has 327 places, 526 transitions, 10107 flow. Second operand 11 states and 184 transitions. [2024-06-21 17:27:11,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 576 transitions, 11519 flow [2024-06-21 17:27:14,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 576 transitions, 11164 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-21 17:27:14,551 INFO L231 Difference]: Finished difference. Result has 330 places, 506 transitions, 9623 flow [2024-06-21 17:27:14,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9752, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9623, PETRI_PLACES=330, PETRI_TRANSITIONS=506} [2024-06-21 17:27:14,552 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 287 predicate places. [2024-06-21 17:27:14,552 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 506 transitions, 9623 flow [2024-06-21 17:27:14,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:27:14,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:27:14,552 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:27:14,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 17:27:14,552 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:27:14,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:27:14,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1536345190, now seen corresponding path program 1 times [2024-06-21 17:27:14,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:27:14,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730167136] [2024-06-21 17:27:14,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:27:14,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:27:14,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:27:17,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:27:17,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:27:17,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730167136] [2024-06-21 17:27:17,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730167136] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:27:17,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:27:17,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:27:17,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532274260] [2024-06-21 17:27:17,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:27:17,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:27:17,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:27:17,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:27:17,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:27:17,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:27:17,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 506 transitions, 9623 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:27:17,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:27:17,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:27:17,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand