./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe014_power.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/safe014_power.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 76401ed0 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/safe014_power.opt.i ./goblint.2024-05-21_14-57-05.files/protection/safe014_power.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-76401ed-m [2024-06-20 17:03:25,172 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-20 17:03:25,243 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-20 17:03:25,247 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-20 17:03:25,248 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-20 17:03:25,280 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-20 17:03:25,281 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-20 17:03:25,281 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-20 17:03:25,281 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-20 17:03:25,285 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-20 17:03:25,285 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-20 17:03:25,286 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-20 17:03:25,286 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-20 17:03:25,287 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-20 17:03:25,288 INFO L153 SettingsManager]: * Use SBE=true [2024-06-20 17:03:25,288 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-20 17:03:25,288 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-20 17:03:25,288 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-20 17:03:25,289 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-20 17:03:25,289 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-20 17:03:25,289 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-20 17:03:25,289 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-20 17:03:25,290 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-20 17:03:25,290 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-20 17:03:25,290 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-20 17:03:25,290 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-20 17:03:25,290 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-20 17:03:25,291 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-20 17:03:25,291 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-20 17:03:25,291 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-20 17:03:25,292 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-20 17:03:25,292 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-20 17:03:25,293 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 17:03:25,293 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-20 17:03:25,293 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-20 17:03:25,293 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-20 17:03:25,293 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-20 17:03:25,294 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-20 17:03:25,295 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-20 17:03:25,295 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-20 17:03:25,295 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-20 17:03:25,295 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-20 17:03:25,295 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-20 17:03:25,295 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-20 17:03:25,554 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-20 17:03:25,581 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-20 17:03:25,583 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-20 17:03:25,584 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-20 17:03:25,585 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-20 17:03:25,586 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe014_power.opt.yml/witness.yml [2024-06-20 17:03:25,763 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-20 17:03:25,763 INFO L274 PluginConnector]: CDTParser initialized [2024-06-20 17:03:25,764 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe014_power.opt.i [2024-06-20 17:03:26,822 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-20 17:03:27,051 INFO L384 CDTParser]: Found 1 translation units. [2024-06-20 17:03:27,051 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe014_power.opt.i [2024-06-20 17:03:27,067 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d05e4813d/b4a9ece8032542f1af5cf35745c258ab/FLAG412746ae7 [2024-06-20 17:03:27,081 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d05e4813d/b4a9ece8032542f1af5cf35745c258ab [2024-06-20 17:03:27,082 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-20 17:03:27,083 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-20 17:03:27,085 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-20 17:03:27,085 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-20 17:03:27,089 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-20 17:03:27,090 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 05:03:25" (1/2) ... [2024-06-20 17:03:27,091 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b7fb1bb and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:03:27, skipping insertion in model container [2024-06-20 17:03:27,091 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 05:03:25" (1/2) ... [2024-06-20 17:03:27,092 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@106386b3 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:03:27, skipping insertion in model container [2024-06-20 17:03:27,092 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 05:03:27" (2/2) ... [2024-06-20 17:03:27,093 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b7fb1bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:03:27, skipping insertion in model container [2024-06-20 17:03:27,093 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 05:03:27" (2/2) ... [2024-06-20 17:03:27,093 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-20 17:03:27,196 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-20 17:03:27,197 INFO L97 edCorrectnessWitness]: Location invariant before [L849-L849] ((((((((((((((((((((((((((((((((! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 2) && __unbuffered_p0_EBX <= 127) && ((__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1) || __unbuffered_p0_EBX == 2)))) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1)))) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (((0 <= *__unbuffered_p0_EAX$read_delayed_var && *__unbuffered_p0_EAX$read_delayed_var <= 1) && __unbuffered_p0_EAX$read_delayed_var == & y) && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || y$read_delayed == (_Bool)0) [2024-06-20 17:03:27,197 INFO L97 edCorrectnessWitness]: Location invariant before [L850-L850] ((((((((((((((((((((((((((((((((! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 2) && __unbuffered_p0_EBX <= 127) && ((__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1) || __unbuffered_p0_EBX == 2)))) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1)))) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (((0 <= *__unbuffered_p0_EAX$read_delayed_var && *__unbuffered_p0_EAX$read_delayed_var <= 1) && __unbuffered_p0_EAX$read_delayed_var == & y) && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || y$read_delayed == (_Bool)0) [2024-06-20 17:03:27,197 INFO L97 edCorrectnessWitness]: Location invariant before [L847-L847] ((((((((((((((((((((((((((((((((! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 2) && __unbuffered_p0_EBX <= 127) && ((__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1) || __unbuffered_p0_EBX == 2)))) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1)))) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (((0 <= *__unbuffered_p0_EAX$read_delayed_var && *__unbuffered_p0_EAX$read_delayed_var <= 1) && __unbuffered_p0_EAX$read_delayed_var == & y) && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || y$read_delayed == (_Bool)0) [2024-06-20 17:03:27,197 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-20 17:03:27,198 INFO L106 edCorrectnessWitness]: ghost_update [L845-L845] multithreaded = 1; [2024-06-20 17:03:27,230 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-20 17:03:27,580 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 17:03:27,590 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-20 17:03:27,743 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 17:03:27,787 INFO L206 MainTranslator]: Completed translation [2024-06-20 17:03:27,789 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:03:27 WrapperNode [2024-06-20 17:03:27,789 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-20 17:03:27,790 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-20 17:03:27,790 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-20 17:03:27,791 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-20 17:03:27,795 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:03:27" (1/1) ... [2024-06-20 17:03:27,822 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:03:27" (1/1) ... [2024-06-20 17:03:27,854 INFO L138 Inliner]: procedures = 175, calls = 82, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 254 [2024-06-20 17:03:27,855 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-20 17:03:27,855 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-20 17:03:27,856 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-20 17:03:27,856 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-20 17:03:27,864 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:03:27" (1/1) ... [2024-06-20 17:03:27,864 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:03:27" (1/1) ... [2024-06-20 17:03:27,868 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:03:27" (1/1) ... [2024-06-20 17:03:27,897 INFO L175 MemorySlicer]: Split 40 memory accesses to 2 slices as follows [2, 38]. 95 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 4 writes are split as follows [0, 4]. [2024-06-20 17:03:27,898 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:03:27" (1/1) ... [2024-06-20 17:03:27,898 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:03:27" (1/1) ... [2024-06-20 17:03:27,907 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:03:27" (1/1) ... [2024-06-20 17:03:27,908 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:03:27" (1/1) ... [2024-06-20 17:03:27,910 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:03:27" (1/1) ... [2024-06-20 17:03:27,912 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:03:27" (1/1) ... [2024-06-20 17:03:27,915 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-20 17:03:27,916 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-20 17:03:27,916 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-20 17:03:27,916 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-20 17:03:27,917 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:03:27" (1/1) ... [2024-06-20 17:03:27,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 17:03:27,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-20 17:03:27,937 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) [2024-06-20 17:03:27,968 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 [2024-06-20 17:03:27,981 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-20 17:03:27,981 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-20 17:03:27,981 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-20 17:03:27,982 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-20 17:03:27,982 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-20 17:03:27,982 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-20 17:03:27,982 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-20 17:03:27,982 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-20 17:03:27,982 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-20 17:03:27,982 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-20 17:03:27,983 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-20 17:03:27,983 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-20 17:03:27,983 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-20 17:03:27,983 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-20 17:03:27,984 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-20 17:03:27,984 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-20 17:03:27,985 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-20 17:03:27,986 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-20 17:03:28,123 INFO L244 CfgBuilder]: Building ICFG [2024-06-20 17:03:28,125 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-20 17:03:28,480 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-20 17:03:28,481 INFO L293 CfgBuilder]: Performing block encoding [2024-06-20 17:03:28,771 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-20 17:03:28,771 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-20 17:03:28,771 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 05:03:28 BoogieIcfgContainer [2024-06-20 17:03:28,772 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-20 17:03:28,773 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-20 17:03:28,773 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-20 17:03:28,775 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-20 17:03:28,775 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 05:03:25" (1/4) ... [2024-06-20 17:03:28,776 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70b92662 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 05:03:28, skipping insertion in model container [2024-06-20 17:03:28,776 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.06 05:03:27" (2/4) ... [2024-06-20 17:03:28,776 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70b92662 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 05:03:28, skipping insertion in model container [2024-06-20 17:03:28,776 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:03:27" (3/4) ... [2024-06-20 17:03:28,777 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70b92662 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 05:03:28, skipping insertion in model container [2024-06-20 17:03:28,777 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 05:03:28" (4/4) ... [2024-06-20 17:03:28,778 INFO L112 eAbstractionObserver]: Analyzing ICFG safe014_power.opt.i [2024-06-20 17:03:28,791 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-20 17:03:28,791 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-20 17:03:28,791 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-20 17:03:28,840 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-20 17:03:28,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-20 17:03:28,899 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-20 17:03:28,900 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 17:03:28,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 55 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-20 17:03:28,902 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-20 17:03:28,905 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-20 17:03:28,916 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-20 17:03:28,924 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;@36c791ad, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-20 17:03:28,924 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-20 17:03:28,928 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-20 17:03:28,929 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-20 17:03:28,929 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 17:03:28,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:03:28,929 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-20 17:03:28,930 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)] === [2024-06-20 17:03:28,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:03:28,937 INFO L85 PathProgramCache]: Analyzing trace with hash 766604024, now seen corresponding path program 1 times [2024-06-20 17:03:28,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:03:28,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495475998] [2024-06-20 17:03:28,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:03:28,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:03:29,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:03:30,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:03:30,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:03:30,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495475998] [2024-06-20 17:03:30,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495475998] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:03:30,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:03:30,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-20 17:03:30,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175854715] [2024-06-20 17:03:30,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:03:30,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-20 17:03:30,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:03:30,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-20 17:03:30,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-20 17:03:30,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-20 17:03:30,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 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) [2024-06-20 17:03:30,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:03:30,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-20 17:03:30,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:03:30,998 INFO L124 PetriNetUnfolderBase]: 770/1239 cut-off events. [2024-06-20 17:03:30,998 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-06-20 17:03:31,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2482 conditions, 1239 events. 770/1239 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 5916 event pairs, 479 based on Foata normal form. 1/1209 useless extension candidates. Maximal degree in co-relation 2470. Up to 1178 conditions per place. [2024-06-20 17:03:31,008 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 33 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2024-06-20 17:03:31,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 45 transitions, 179 flow [2024-06-20 17:03:31,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-20 17:03:31,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-20 17:03:31,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 73 transitions. [2024-06-20 17:03:31,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5793650793650794 [2024-06-20 17:03:31,017 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 73 transitions. [2024-06-20 17:03:31,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 45 transitions, 179 flow [2024-06-20 17:03:31,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 45 transitions, 174 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-20 17:03:31,021 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-20 17:03:31,022 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} [2024-06-20 17:03:31,024 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-20 17:03:31,025 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-20 17:03:31,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 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) [2024-06-20 17:03:31,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:03:31,025 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:03:31,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-20 17:03:31,026 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)] === [2024-06-20 17:03:31,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:03:31,026 INFO L85 PathProgramCache]: Analyzing trace with hash -2026897835, now seen corresponding path program 1 times [2024-06-20 17:03:31,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:03:31,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419851849] [2024-06-20 17:03:31,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:03:31,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:03:31,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:03:32,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:03:32,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:03:32,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419851849] [2024-06-20 17:03:32,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419851849] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:03:32,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:03:32,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-20 17:03:32,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21772213] [2024-06-20 17:03:32,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:03:32,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-20 17:03:32,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:03:32,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-20 17:03:32,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-20 17:03:32,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-20 17:03:32,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:03:32,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:03:32,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-20 17:03:32,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:03:33,372 INFO L124 PetriNetUnfolderBase]: 764/1231 cut-off events. [2024-06-20 17:03:33,372 INFO L125 PetriNetUnfolderBase]: For 253/261 co-relation queries the response was YES. [2024-06-20 17:03:33,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2837 conditions, 1231 events. 764/1231 cut-off events. For 253/261 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 5865 event pairs, 369 based on Foata normal form. 6/1234 useless extension candidates. Maximal degree in co-relation 2825. Up to 1150 conditions per place. [2024-06-20 17:03:33,378 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 42 selfloop transitions, 7 changer transitions 0/57 dead transitions. [2024-06-20 17:03:33,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 57 transitions, 254 flow [2024-06-20 17:03:33,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 17:03:33,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 17:03:33,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 96 transitions. [2024-06-20 17:03:33,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-20 17:03:33,380 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 96 transitions. [2024-06-20 17:03:33,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 57 transitions, 254 flow [2024-06-20 17:03:33,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 57 transitions, 250 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-20 17:03:33,382 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-20 17:03:33,382 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} [2024-06-20 17:03:33,382 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-20 17:03:33,383 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-20 17:03:33,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:03:33,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:03:33,383 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:03:33,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-20 17:03:33,383 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)] === [2024-06-20 17:03:33,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:03:33,384 INFO L85 PathProgramCache]: Analyzing trace with hash -366307249, now seen corresponding path program 1 times [2024-06-20 17:03:33,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:03:33,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223395047] [2024-06-20 17:03:33,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:03:33,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:03:33,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:03:35,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:03:35,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:03:35,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223395047] [2024-06-20 17:03:35,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223395047] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:03:35,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:03:35,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 17:03:35,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652975195] [2024-06-20 17:03:35,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:03:35,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:03:35,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:03:35,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:03:35,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:03:35,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 17:03:35,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 138 flow. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:03:35,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:03:35,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 17:03:35,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:03:36,412 INFO L124 PetriNetUnfolderBase]: 969/1526 cut-off events. [2024-06-20 17:03:36,412 INFO L125 PetriNetUnfolderBase]: For 847/863 co-relation queries the response was YES. [2024-06-20 17:03:36,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3915 conditions, 1526 events. 969/1526 cut-off events. For 847/863 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 7199 event pairs, 305 based on Foata normal form. 12/1532 useless extension candidates. Maximal degree in co-relation 3901. Up to 1394 conditions per place. [2024-06-20 17:03:36,419 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 57 selfloop transitions, 12 changer transitions 0/76 dead transitions. [2024-06-20 17:03:36,419 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 76 transitions, 378 flow [2024-06-20 17:03:36,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:03:36,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:03:36,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 132 transitions. [2024-06-20 17:03:36,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-06-20 17:03:36,422 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 6 states and 132 transitions. [2024-06-20 17:03:36,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 76 transitions, 378 flow [2024-06-20 17:03:36,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 76 transitions, 358 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-20 17:03:36,424 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 181 flow [2024-06-20 17:03:36,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=181, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2024-06-20 17:03:36,425 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 7 predicate places. [2024-06-20 17:03:36,425 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 181 flow [2024-06-20 17:03:36,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:03:36,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:03:36,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:03:36,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-20 17:03:36,426 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:03:36,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:03:36,426 INFO L85 PathProgramCache]: Analyzing trace with hash -1879731518, now seen corresponding path program 1 times [2024-06-20 17:03:36,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:03:36,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363916128] [2024-06-20 17:03:36,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:03:36,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:03:36,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:03:37,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:03:37,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:03:37,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363916128] [2024-06-20 17:03:37,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363916128] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:03:37,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:03:37,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 17:03:37,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666344265] [2024-06-20 17:03:37,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:03:37,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:03:37,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:03:37,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:03:37,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:03:37,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:03:37,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 181 flow. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:03:37,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:03:37,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:03:37,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:03:38,441 INFO L124 PetriNetUnfolderBase]: 1120/1739 cut-off events. [2024-06-20 17:03:38,442 INFO L125 PetriNetUnfolderBase]: For 1717/1717 co-relation queries the response was YES. [2024-06-20 17:03:38,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4888 conditions, 1739 events. 1120/1739 cut-off events. For 1717/1717 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 8173 event pairs, 441 based on Foata normal form. 2/1740 useless extension candidates. Maximal degree in co-relation 4871. Up to 1665 conditions per place. [2024-06-20 17:03:38,451 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 52 selfloop transitions, 10 changer transitions 0/67 dead transitions. [2024-06-20 17:03:38,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 67 transitions, 386 flow [2024-06-20 17:03:38,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 17:03:38,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 17:03:38,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 92 transitions. [2024-06-20 17:03:38,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4380952380952381 [2024-06-20 17:03:38,453 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 181 flow. Second operand 5 states and 92 transitions. [2024-06-20 17:03:38,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 67 transitions, 386 flow [2024-06-20 17:03:38,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 67 transitions, 355 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-20 17:03:38,457 INFO L231 Difference]: Finished difference. Result has 53 places, 51 transitions, 228 flow [2024-06-20 17:03:38,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=228, PETRI_PLACES=53, PETRI_TRANSITIONS=51} [2024-06-20 17:03:38,457 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 10 predicate places. [2024-06-20 17:03:38,458 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 51 transitions, 228 flow [2024-06-20 17:03:38,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:03:38,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:03:38,458 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:03:38,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-20 17:03:38,459 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)] === [2024-06-20 17:03:38,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:03:38,459 INFO L85 PathProgramCache]: Analyzing trace with hash 1868979045, now seen corresponding path program 1 times [2024-06-20 17:03:38,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:03:38,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694631076] [2024-06-20 17:03:38,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:03:38,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:03:38,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:03:39,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:03:39,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:03:39,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694631076] [2024-06-20 17:03:39,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694631076] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:03:39,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:03:39,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 17:03:39,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600002023] [2024-06-20 17:03:39,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:03:39,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:03:39,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:03:39,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:03:39,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:03:39,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:03:39,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 51 transitions, 228 flow. Second operand has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:03:39,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:03:39,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:03:39,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:03:40,342 INFO L124 PetriNetUnfolderBase]: 1115/1737 cut-off events. [2024-06-20 17:03:40,343 INFO L125 PetriNetUnfolderBase]: For 2509/2511 co-relation queries the response was YES. [2024-06-20 17:03:40,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5388 conditions, 1737 events. 1115/1737 cut-off events. For 2509/2511 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 8144 event pairs, 457 based on Foata normal form. 4/1741 useless extension candidates. Maximal degree in co-relation 5368. Up to 1660 conditions per place. [2024-06-20 17:03:40,353 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 51 selfloop transitions, 10 changer transitions 0/66 dead transitions. [2024-06-20 17:03:40,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 66 transitions, 389 flow [2024-06-20 17:03:40,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 17:03:40,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 17:03:40,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 90 transitions. [2024-06-20 17:03:40,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-20 17:03:40,357 INFO L175 Difference]: Start difference. First operand has 53 places, 51 transitions, 228 flow. Second operand 5 states and 90 transitions. [2024-06-20 17:03:40,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 66 transitions, 389 flow [2024-06-20 17:03:40,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 66 transitions, 385 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-20 17:03:40,368 INFO L231 Difference]: Finished difference. Result has 57 places, 52 transitions, 257 flow [2024-06-20 17:03:40,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=257, PETRI_PLACES=57, PETRI_TRANSITIONS=52} [2024-06-20 17:03:40,371 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 14 predicate places. [2024-06-20 17:03:40,371 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 52 transitions, 257 flow [2024-06-20 17:03:40,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:03:40,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:03:40,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:03:40,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-20 17:03:40,373 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)] === [2024-06-20 17:03:40,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:03:40,373 INFO L85 PathProgramCache]: Analyzing trace with hash 2096901911, now seen corresponding path program 1 times [2024-06-20 17:03:40,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:03:40,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185575293] [2024-06-20 17:03:40,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:03:40,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:03:40,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:03:42,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:03:42,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:03:42,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185575293] [2024-06-20 17:03:42,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185575293] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:03:42,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:03:42,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:03:42,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113246938] [2024-06-20 17:03:42,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:03:42,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:03:42,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:03:42,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:03:42,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:03:42,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:03:42,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 52 transitions, 257 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:03:42,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:03:42,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:03:42,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:03:43,275 INFO L124 PetriNetUnfolderBase]: 1128/1754 cut-off events. [2024-06-20 17:03:43,276 INFO L125 PetriNetUnfolderBase]: For 3324/3324 co-relation queries the response was YES. [2024-06-20 17:03:43,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5647 conditions, 1754 events. 1128/1754 cut-off events. For 3324/3324 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 8157 event pairs, 421 based on Foata normal form. 2/1755 useless extension candidates. Maximal degree in co-relation 5624. Up to 1609 conditions per place. [2024-06-20 17:03:43,284 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 64 selfloop transitions, 17 changer transitions 0/86 dead transitions. [2024-06-20 17:03:43,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 86 transitions, 537 flow [2024-06-20 17:03:43,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:03:43,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:03:43,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 115 transitions. [2024-06-20 17:03:43,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45634920634920634 [2024-06-20 17:03:43,285 INFO L175 Difference]: Start difference. First operand has 57 places, 52 transitions, 257 flow. Second operand 6 states and 115 transitions. [2024-06-20 17:03:43,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 86 transitions, 537 flow [2024-06-20 17:03:43,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 86 transitions, 525 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-20 17:03:43,291 INFO L231 Difference]: Finished difference. Result has 62 places, 60 transitions, 342 flow [2024-06-20 17:03:43,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=342, PETRI_PLACES=62, PETRI_TRANSITIONS=60} [2024-06-20 17:03:43,294 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 19 predicate places. [2024-06-20 17:03:43,295 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 60 transitions, 342 flow [2024-06-20 17:03:43,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:03:43,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:03:43,295 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:03:43,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-20 17:03:43,295 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)] === [2024-06-20 17:03:43,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:03:43,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1297051273, now seen corresponding path program 2 times [2024-06-20 17:03:43,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:03:43,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088695315] [2024-06-20 17:03:43,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:03:43,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:03:43,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:03:45,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:03:45,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:03:45,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088695315] [2024-06-20 17:03:45,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088695315] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:03:45,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:03:45,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:03:45,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389693352] [2024-06-20 17:03:45,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:03:45,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:03:45,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:03:45,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:03:45,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:03:45,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:03:45,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 60 transitions, 342 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:03:45,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:03:45,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:03:45,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:03:46,117 INFO L124 PetriNetUnfolderBase]: 1123/1742 cut-off events. [2024-06-20 17:03:46,117 INFO L125 PetriNetUnfolderBase]: For 4966/4972 co-relation queries the response was YES. [2024-06-20 17:03:46,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6232 conditions, 1742 events. 1123/1742 cut-off events. For 4966/4972 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 8104 event pairs, 431 based on Foata normal form. 8/1748 useless extension candidates. Maximal degree in co-relation 6206. Up to 1606 conditions per place. [2024-06-20 17:03:46,126 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 59 selfloop transitions, 20 changer transitions 0/84 dead transitions. [2024-06-20 17:03:46,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 84 transitions, 594 flow [2024-06-20 17:03:46,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:03:46,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:03:46,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-20 17:03:46,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-20 17:03:46,128 INFO L175 Difference]: Start difference. First operand has 62 places, 60 transitions, 342 flow. Second operand 6 states and 110 transitions. [2024-06-20 17:03:46,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 84 transitions, 594 flow [2024-06-20 17:03:46,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 84 transitions, 572 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-20 17:03:46,132 INFO L231 Difference]: Finished difference. Result has 66 places, 63 transitions, 390 flow [2024-06-20 17:03:46,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=390, PETRI_PLACES=66, PETRI_TRANSITIONS=63} [2024-06-20 17:03:46,133 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 23 predicate places. [2024-06-20 17:03:46,133 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 63 transitions, 390 flow [2024-06-20 17:03:46,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:03:46,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:03:46,134 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:03:46,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-20 17:03:46,134 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)] === [2024-06-20 17:03:46,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:03:46,134 INFO L85 PathProgramCache]: Analyzing trace with hash -867065970, now seen corresponding path program 1 times [2024-06-20 17:03:46,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:03:46,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217572143] [2024-06-20 17:03:46,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:03:46,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:03:46,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:03:48,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:03:48,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:03:48,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217572143] [2024-06-20 17:03:48,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217572143] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:03:48,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:03:48,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:03:48,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420120247] [2024-06-20 17:03:48,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:03:48,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:03:48,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:03:48,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:03:48,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:03:48,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:03:48,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 63 transitions, 390 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:03:48,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:03:48,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:03:48,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:03:48,951 INFO L124 PetriNetUnfolderBase]: 1227/1927 cut-off events. [2024-06-20 17:03:48,951 INFO L125 PetriNetUnfolderBase]: For 6305/6311 co-relation queries the response was YES. [2024-06-20 17:03:48,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7192 conditions, 1927 events. 1227/1927 cut-off events. For 6305/6311 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 9290 event pairs, 378 based on Foata normal form. 9/1936 useless extension candidates. Maximal degree in co-relation 7164. Up to 1725 conditions per place. [2024-06-20 17:03:48,964 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 92 selfloop transitions, 34 changer transitions 0/131 dead transitions. [2024-06-20 17:03:48,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 131 transitions, 928 flow [2024-06-20 17:03:48,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:03:48,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:03:48,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-20 17:03:48,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-20 17:03:48,967 INFO L175 Difference]: Start difference. First operand has 66 places, 63 transitions, 390 flow. Second operand 9 states and 171 transitions. [2024-06-20 17:03:48,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 131 transitions, 928 flow [2024-06-20 17:03:48,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 131 transitions, 895 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-20 17:03:48,974 INFO L231 Difference]: Finished difference. Result has 75 places, 84 transitions, 603 flow [2024-06-20 17:03:48,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=361, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=603, PETRI_PLACES=75, PETRI_TRANSITIONS=84} [2024-06-20 17:03:48,976 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 32 predicate places. [2024-06-20 17:03:48,976 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 84 transitions, 603 flow [2024-06-20 17:03:48,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:03:48,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:03:48,976 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:03:48,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-20 17:03:48,976 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)] === [2024-06-20 17:03:48,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:03:48,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1474049624, now seen corresponding path program 2 times [2024-06-20 17:03:48,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:03:48,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137674248] [2024-06-20 17:03:48,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:03:48,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:03:48,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:03:51,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:03:51,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:03:51,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137674248] [2024-06-20 17:03:51,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137674248] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:03:51,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:03:51,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:03:51,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570681492] [2024-06-20 17:03:51,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:03:51,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:03:51,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:03:51,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:03:51,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:03:51,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:03:51,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 84 transitions, 603 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:03:51,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:03:51,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:03:51,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:03:52,208 INFO L124 PetriNetUnfolderBase]: 1271/2002 cut-off events. [2024-06-20 17:03:52,208 INFO L125 PetriNetUnfolderBase]: For 9387/9395 co-relation queries the response was YES. [2024-06-20 17:03:52,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8372 conditions, 2002 events. 1271/2002 cut-off events. For 9387/9395 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 9739 event pairs, 355 based on Foata normal form. 11/2013 useless extension candidates. Maximal degree in co-relation 8339. Up to 1749 conditions per place. [2024-06-20 17:03:52,222 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 86 selfloop transitions, 42 changer transitions 0/133 dead transitions. [2024-06-20 17:03:52,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 133 transitions, 1091 flow [2024-06-20 17:03:52,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:03:52,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:03:52,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-20 17:03:52,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-20 17:03:52,224 INFO L175 Difference]: Start difference. First operand has 75 places, 84 transitions, 603 flow. Second operand 8 states and 152 transitions. [2024-06-20 17:03:52,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 133 transitions, 1091 flow [2024-06-20 17:03:52,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 133 transitions, 1057 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-20 17:03:52,233 INFO L231 Difference]: Finished difference. Result has 82 places, 92 transitions, 760 flow [2024-06-20 17:03:52,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=569, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=760, PETRI_PLACES=82, PETRI_TRANSITIONS=92} [2024-06-20 17:03:52,234 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 39 predicate places. [2024-06-20 17:03:52,235 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 92 transitions, 760 flow [2024-06-20 17:03:52,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:03:52,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:03:52,237 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:03:52,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-20 17:03:52,237 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)] === [2024-06-20 17:03:52,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:03:52,238 INFO L85 PathProgramCache]: Analyzing trace with hash -1902610090, now seen corresponding path program 1 times [2024-06-20 17:03:52,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:03:52,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390790566] [2024-06-20 17:03:52,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:03:52,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:03:52,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:03:53,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:03:53,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:03:53,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390790566] [2024-06-20 17:03:53,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390790566] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:03:53,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:03:53,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:03:53,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393281570] [2024-06-20 17:03:53,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:03:53,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:03:53,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:03:53,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:03:53,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:03:54,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:03:54,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 92 transitions, 760 flow. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:03:54,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:03:54,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:03:54,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:03:54,937 INFO L124 PetriNetUnfolderBase]: 1284/2016 cut-off events. [2024-06-20 17:03:54,937 INFO L125 PetriNetUnfolderBase]: For 12515/12523 co-relation queries the response was YES. [2024-06-20 17:03:54,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9331 conditions, 2016 events. 1284/2016 cut-off events. For 12515/12523 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 9700 event pairs, 391 based on Foata normal form. 10/2025 useless extension candidates. Maximal degree in co-relation 9295. Up to 1823 conditions per place. [2024-06-20 17:03:54,946 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 93 selfloop transitions, 23 changer transitions 0/121 dead transitions. [2024-06-20 17:03:54,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 121 transitions, 1126 flow [2024-06-20 17:03:54,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:03:54,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:03:54,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 115 transitions. [2024-06-20 17:03:54,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45634920634920634 [2024-06-20 17:03:54,948 INFO L175 Difference]: Start difference. First operand has 82 places, 92 transitions, 760 flow. Second operand 6 states and 115 transitions. [2024-06-20 17:03:54,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 121 transitions, 1126 flow [2024-06-20 17:03:54,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 121 transitions, 1061 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-20 17:03:54,962 INFO L231 Difference]: Finished difference. Result has 84 places, 95 transitions, 770 flow [2024-06-20 17:03:54,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=695, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=770, PETRI_PLACES=84, PETRI_TRANSITIONS=95} [2024-06-20 17:03:54,963 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 41 predicate places. [2024-06-20 17:03:54,964 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 95 transitions, 770 flow [2024-06-20 17:03:54,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:03:54,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:03:54,964 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:03:54,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-20 17:03:54,965 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)] === [2024-06-20 17:03:54,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:03:54,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1474044974, now seen corresponding path program 3 times [2024-06-20 17:03:54,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:03:54,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000961425] [2024-06-20 17:03:54,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:03:54,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:03:54,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:03:56,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:03:56,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:03:56,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000961425] [2024-06-20 17:03:56,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000961425] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:03:56,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:03:56,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:03:56,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431218166] [2024-06-20 17:03:56,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:03:56,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:03:56,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:03:56,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:03:56,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:03:56,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:03:56,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 95 transitions, 770 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:03:56,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:03:56,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:03:56,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:03:57,966 INFO L124 PetriNetUnfolderBase]: 1297/2038 cut-off events. [2024-06-20 17:03:57,967 INFO L125 PetriNetUnfolderBase]: For 13392/13394 co-relation queries the response was YES. [2024-06-20 17:03:57,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9452 conditions, 2038 events. 1297/2038 cut-off events. For 13392/13394 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 9817 event pairs, 391 based on Foata normal form. 2/2038 useless extension candidates. Maximal degree in co-relation 9414. Up to 1688 conditions per place. [2024-06-20 17:03:57,985 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 97 selfloop transitions, 43 changer transitions 0/145 dead transitions. [2024-06-20 17:03:57,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 145 transitions, 1367 flow [2024-06-20 17:03:57,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:03:57,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:03:57,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-20 17:03:57,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-20 17:03:57,987 INFO L175 Difference]: Start difference. First operand has 84 places, 95 transitions, 770 flow. Second operand 7 states and 133 transitions. [2024-06-20 17:03:57,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 145 transitions, 1367 flow [2024-06-20 17:03:57,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 145 transitions, 1328 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-20 17:03:58,001 INFO L231 Difference]: Finished difference. Result has 90 places, 115 transitions, 1089 flow [2024-06-20 17:03:58,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=737, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1089, PETRI_PLACES=90, PETRI_TRANSITIONS=115} [2024-06-20 17:03:58,002 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 47 predicate places. [2024-06-20 17:03:58,002 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 115 transitions, 1089 flow [2024-06-20 17:03:58,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:03:58,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:03:58,002 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:03:58,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-20 17:03:58,003 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)] === [2024-06-20 17:03:58,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:03:58,003 INFO L85 PathProgramCache]: Analyzing trace with hash -1553875900, now seen corresponding path program 2 times [2024-06-20 17:03:58,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:03:58,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725546344] [2024-06-20 17:03:58,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:03:58,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:03:58,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:03:59,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:03:59,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:03:59,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725546344] [2024-06-20 17:03:59,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725546344] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:03:59,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:03:59,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:03:59,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926968522] [2024-06-20 17:03:59,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:03:59,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:03:59,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:03:59,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:03:59,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:03:59,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:03:59,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 115 transitions, 1089 flow. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:03:59,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:03:59,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:03:59,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:04:00,714 INFO L124 PetriNetUnfolderBase]: 1292/2040 cut-off events. [2024-06-20 17:04:00,714 INFO L125 PetriNetUnfolderBase]: For 16597/16629 co-relation queries the response was YES. [2024-06-20 17:04:00,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10134 conditions, 2040 events. 1292/2040 cut-off events. For 16597/16629 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 9958 event pairs, 398 based on Foata normal form. 34/2074 useless extension candidates. Maximal degree in co-relation 10093. Up to 1837 conditions per place. [2024-06-20 17:04:00,751 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 109 selfloop transitions, 23 changer transitions 0/137 dead transitions. [2024-06-20 17:04:00,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 137 transitions, 1429 flow [2024-06-20 17:04:00,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:04:00,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:04:00,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-20 17:04:00,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-20 17:04:00,754 INFO L175 Difference]: Start difference. First operand has 90 places, 115 transitions, 1089 flow. Second operand 6 states and 108 transitions. [2024-06-20 17:04:00,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 137 transitions, 1429 flow [2024-06-20 17:04:00,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 137 transitions, 1391 flow, removed 14 selfloop flow, removed 2 redundant places. [2024-06-20 17:04:00,768 INFO L231 Difference]: Finished difference. Result has 94 places, 116 transitions, 1115 flow [2024-06-20 17:04:00,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1051, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1115, PETRI_PLACES=94, PETRI_TRANSITIONS=116} [2024-06-20 17:04:00,769 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 51 predicate places. [2024-06-20 17:04:00,769 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 116 transitions, 1115 flow [2024-06-20 17:04:00,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:04:00,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:04:00,769 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:04:00,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-20 17:04:00,769 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)] === [2024-06-20 17:04:00,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:04:00,770 INFO L85 PathProgramCache]: Analyzing trace with hash 779819504, now seen corresponding path program 4 times [2024-06-20 17:04:00,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:04:00,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264232258] [2024-06-20 17:04:00,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:04:00,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:04:00,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:04:02,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:04:02,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:04:02,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264232258] [2024-06-20 17:04:02,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264232258] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:04:02,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:04:02,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:04:02,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222392327] [2024-06-20 17:04:02,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:04:02,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:04:02,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:04:02,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:04:02,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:04:02,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:04:02,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 116 transitions, 1115 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:04:02,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:04:02,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:04:02,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:04:03,765 INFO L124 PetriNetUnfolderBase]: 1287/2009 cut-off events. [2024-06-20 17:04:03,765 INFO L125 PetriNetUnfolderBase]: For 18225/18233 co-relation queries the response was YES. [2024-06-20 17:04:03,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10250 conditions, 2009 events. 1287/2009 cut-off events. For 18225/18233 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 9524 event pairs, 421 based on Foata normal form. 4/2008 useless extension candidates. Maximal degree in co-relation 10207. Up to 1682 conditions per place. [2024-06-20 17:04:03,775 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 92 selfloop transitions, 48 changer transitions 0/145 dead transitions. [2024-06-20 17:04:03,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 145 transitions, 1551 flow [2024-06-20 17:04:03,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:04:03,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:04:03,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-20 17:04:03,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43537414965986393 [2024-06-20 17:04:03,781 INFO L175 Difference]: Start difference. First operand has 94 places, 116 transitions, 1115 flow. Second operand 7 states and 128 transitions. [2024-06-20 17:04:03,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 145 transitions, 1551 flow [2024-06-20 17:04:03,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 145 transitions, 1520 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-20 17:04:03,795 INFO L231 Difference]: Finished difference. Result has 98 places, 119 transitions, 1226 flow [2024-06-20 17:04:03,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1084, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1226, PETRI_PLACES=98, PETRI_TRANSITIONS=119} [2024-06-20 17:04:03,795 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 55 predicate places. [2024-06-20 17:04:03,795 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 119 transitions, 1226 flow [2024-06-20 17:04:03,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:04:03,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:04:03,796 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:04:03,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-20 17:04:03,796 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)] === [2024-06-20 17:04:03,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:04:03,796 INFO L85 PathProgramCache]: Analyzing trace with hash 792577988, now seen corresponding path program 1 times [2024-06-20 17:04:03,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:04:03,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361437037] [2024-06-20 17:04:03,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:04:03,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:04:03,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:04:04,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:04:04,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:04:04,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361437037] [2024-06-20 17:04:04,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361437037] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:04:04,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:04:04,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:04:04,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726766621] [2024-06-20 17:04:04,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:04:04,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:04:04,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:04:04,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:04:04,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:04:04,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:04:04,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 119 transitions, 1226 flow. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:04:04,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:04:04,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:04:04,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:04:05,703 INFO L124 PetriNetUnfolderBase]: 1279/2014 cut-off events. [2024-06-20 17:04:05,703 INFO L125 PetriNetUnfolderBase]: For 20701/20707 co-relation queries the response was YES. [2024-06-20 17:04:05,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10579 conditions, 2014 events. 1279/2014 cut-off events. For 20701/20707 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 9687 event pairs, 380 based on Foata normal form. 8/2022 useless extension candidates. Maximal degree in co-relation 10534. Up to 1878 conditions per place. [2024-06-20 17:04:05,714 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 124 selfloop transitions, 12 changer transitions 0/141 dead transitions. [2024-06-20 17:04:05,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 141 transitions, 1574 flow [2024-06-20 17:04:05,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:04:05,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:04:05,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-20 17:04:05,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-20 17:04:05,716 INFO L175 Difference]: Start difference. First operand has 98 places, 119 transitions, 1226 flow. Second operand 6 states and 106 transitions. [2024-06-20 17:04:05,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 141 transitions, 1574 flow [2024-06-20 17:04:05,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 141 transitions, 1492 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-20 17:04:05,735 INFO L231 Difference]: Finished difference. Result has 100 places, 121 transitions, 1199 flow [2024-06-20 17:04:05,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1144, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1199, PETRI_PLACES=100, PETRI_TRANSITIONS=121} [2024-06-20 17:04:05,735 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 57 predicate places. [2024-06-20 17:04:05,735 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 121 transitions, 1199 flow [2024-06-20 17:04:05,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:04:05,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:04:05,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:04:05,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-20 17:04:05,736 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)] === [2024-06-20 17:04:05,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:04:05,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1549103301, now seen corresponding path program 1 times [2024-06-20 17:04:05,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:04:05,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160736100] [2024-06-20 17:04:05,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:04:05,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:04:05,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:04:07,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:04:07,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:04:07,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160736100] [2024-06-20 17:04:07,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160736100] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:04:07,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:04:07,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:04:07,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251512732] [2024-06-20 17:04:07,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:04:07,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:04:07,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:04:07,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:04:07,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:04:07,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:04:07,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 121 transitions, 1199 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:04:07,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:04:07,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:04:07,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:04:08,802 INFO L124 PetriNetUnfolderBase]: 1263/1994 cut-off events. [2024-06-20 17:04:08,803 INFO L125 PetriNetUnfolderBase]: For 22030/22038 co-relation queries the response was YES. [2024-06-20 17:04:08,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10443 conditions, 1994 events. 1263/1994 cut-off events. For 22030/22038 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 9608 event pairs, 371 based on Foata normal form. 14/2008 useless extension candidates. Maximal degree in co-relation 10396. Up to 1745 conditions per place. [2024-06-20 17:04:08,816 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 98 selfloop transitions, 56 changer transitions 0/159 dead transitions. [2024-06-20 17:04:08,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 159 transitions, 1631 flow [2024-06-20 17:04:08,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:04:08,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:04:08,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-20 17:04:08,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-20 17:04:08,818 INFO L175 Difference]: Start difference. First operand has 100 places, 121 transitions, 1199 flow. Second operand 8 states and 150 transitions. [2024-06-20 17:04:08,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 159 transitions, 1631 flow [2024-06-20 17:04:08,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 159 transitions, 1572 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-20 17:04:08,836 INFO L231 Difference]: Finished difference. Result has 104 places, 121 transitions, 1272 flow [2024-06-20 17:04:08,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1140, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1272, PETRI_PLACES=104, PETRI_TRANSITIONS=121} [2024-06-20 17:04:08,837 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 61 predicate places. [2024-06-20 17:04:08,837 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 121 transitions, 1272 flow [2024-06-20 17:04:08,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:04:08,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:04:08,838 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:04:08,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-20 17:04:08,838 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)] === [2024-06-20 17:04:08,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:04:08,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1549247451, now seen corresponding path program 2 times [2024-06-20 17:04:08,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:04:08,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575262974] [2024-06-20 17:04:08,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:04:08,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:04:08,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:04:11,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:04:11,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:04:11,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575262974] [2024-06-20 17:04:11,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575262974] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:04:11,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:04:11,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:04:11,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336903885] [2024-06-20 17:04:11,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:04:11,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:04:11,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:04:11,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:04:11,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:04:11,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:04:11,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 121 transitions, 1272 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:04:11,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:04:11,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:04:11,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:04:12,340 INFO L124 PetriNetUnfolderBase]: 1276/2013 cut-off events. [2024-06-20 17:04:12,341 INFO L125 PetriNetUnfolderBase]: For 24558/24560 co-relation queries the response was YES. [2024-06-20 17:04:12,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10809 conditions, 2013 events. 1276/2013 cut-off events. For 24558/24560 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 9759 event pairs, 388 based on Foata normal form. 2/2013 useless extension candidates. Maximal degree in co-relation 10761. Up to 1666 conditions per place. [2024-06-20 17:04:12,352 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 104 selfloop transitions, 49 changer transitions 0/158 dead transitions. [2024-06-20 17:04:12,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 158 transitions, 1766 flow [2024-06-20 17:04:12,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:04:12,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:04:12,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-20 17:04:12,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-20 17:04:12,354 INFO L175 Difference]: Start difference. First operand has 104 places, 121 transitions, 1272 flow. Second operand 8 states and 149 transitions. [2024-06-20 17:04:12,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 158 transitions, 1766 flow [2024-06-20 17:04:12,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 158 transitions, 1638 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-20 17:04:12,402 INFO L231 Difference]: Finished difference. Result has 105 places, 124 transitions, 1288 flow [2024-06-20 17:04:12,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1150, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1288, PETRI_PLACES=105, PETRI_TRANSITIONS=124} [2024-06-20 17:04:12,402 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 62 predicate places. [2024-06-20 17:04:12,402 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 124 transitions, 1288 flow [2024-06-20 17:04:12,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:04:12,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:04:12,403 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:04:12,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-20 17:04:12,403 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)] === [2024-06-20 17:04:12,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:04:12,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1148630557, now seen corresponding path program 3 times [2024-06-20 17:04:12,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:04:12,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727281350] [2024-06-20 17:04:12,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:04:12,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:04:12,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:04:14,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:04:14,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:04:14,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727281350] [2024-06-20 17:04:14,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727281350] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:04:14,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:04:14,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:04:14,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045549972] [2024-06-20 17:04:14,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:04:14,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:04:14,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:04:14,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:04:14,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:04:14,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:04:14,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 124 transitions, 1288 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:04:14,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:04:14,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:04:14,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:04:15,228 INFO L124 PetriNetUnfolderBase]: 1307/2073 cut-off events. [2024-06-20 17:04:15,228 INFO L125 PetriNetUnfolderBase]: For 25008/25010 co-relation queries the response was YES. [2024-06-20 17:04:15,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11030 conditions, 2073 events. 1307/2073 cut-off events. For 25008/25010 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 10142 event pairs, 388 based on Foata normal form. 2/2074 useless extension candidates. Maximal degree in co-relation 10981. Up to 1699 conditions per place. [2024-06-20 17:04:15,240 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 104 selfloop transitions, 52 changer transitions 0/161 dead transitions. [2024-06-20 17:04:15,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 161 transitions, 1880 flow [2024-06-20 17:04:15,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:04:15,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:04:15,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-20 17:04:15,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45918367346938777 [2024-06-20 17:04:15,244 INFO L175 Difference]: Start difference. First operand has 105 places, 124 transitions, 1288 flow. Second operand 7 states and 135 transitions. [2024-06-20 17:04:15,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 161 transitions, 1880 flow [2024-06-20 17:04:15,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 161 transitions, 1756 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-20 17:04:15,267 INFO L231 Difference]: Finished difference. Result has 106 places, 130 transitions, 1352 flow [2024-06-20 17:04:15,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1176, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1352, PETRI_PLACES=106, PETRI_TRANSITIONS=130} [2024-06-20 17:04:15,268 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 63 predicate places. [2024-06-20 17:04:15,268 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 130 transitions, 1352 flow [2024-06-20 17:04:15,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:04:15,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:04:15,268 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:04:15,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-20 17:04:15,268 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)] === [2024-06-20 17:04:15,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:04:15,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1595397763, now seen corresponding path program 4 times [2024-06-20 17:04:15,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:04:15,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414952849] [2024-06-20 17:04:15,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:04:15,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:04:15,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:04:17,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:04:17,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:04:17,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414952849] [2024-06-20 17:04:17,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414952849] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:04:17,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:04:17,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:04:17,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59107856] [2024-06-20 17:04:17,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:04:17,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:04:17,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:04:17,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:04:17,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:04:17,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:04:17,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 130 transitions, 1352 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:04:17,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:04:17,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:04:17,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:04:18,738 INFO L124 PetriNetUnfolderBase]: 1302/2048 cut-off events. [2024-06-20 17:04:18,738 INFO L125 PetriNetUnfolderBase]: For 27302/27310 co-relation queries the response was YES. [2024-06-20 17:04:18,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11055 conditions, 2048 events. 1302/2048 cut-off events. For 27302/27310 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 9863 event pairs, 427 based on Foata normal form. 4/2047 useless extension candidates. Maximal degree in co-relation 11005. Up to 1694 conditions per place. [2024-06-20 17:04:18,751 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 99 selfloop transitions, 57 changer transitions 0/161 dead transitions. [2024-06-20 17:04:18,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 161 transitions, 1814 flow [2024-06-20 17:04:18,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:04:18,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:04:18,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-20 17:04:18,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-20 17:04:18,753 INFO L175 Difference]: Start difference. First operand has 106 places, 130 transitions, 1352 flow. Second operand 8 states and 144 transitions. [2024-06-20 17:04:18,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 161 transitions, 1814 flow [2024-06-20 17:04:18,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 161 transitions, 1741 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-20 17:04:18,777 INFO L231 Difference]: Finished difference. Result has 111 places, 130 transitions, 1401 flow [2024-06-20 17:04:18,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1279, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1401, PETRI_PLACES=111, PETRI_TRANSITIONS=130} [2024-06-20 17:04:18,778 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 68 predicate places. [2024-06-20 17:04:18,778 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 130 transitions, 1401 flow [2024-06-20 17:04:18,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:04:18,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:04:18,779 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:04:18,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-20 17:04:18,779 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)] === [2024-06-20 17:04:18,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:04:18,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1200161713, now seen corresponding path program 5 times [2024-06-20 17:04:18,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:04:18,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219870108] [2024-06-20 17:04:18,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:04:18,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:04:18,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:04:20,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:04:20,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:04:20,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219870108] [2024-06-20 17:04:20,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219870108] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:04:20,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:04:20,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:04:20,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639155306] [2024-06-20 17:04:20,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:04:20,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:04:20,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:04:20,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:04:20,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:04:20,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:04:20,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 130 transitions, 1401 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:04:20,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:04:20,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:04:20,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:04:21,669 INFO L124 PetriNetUnfolderBase]: 1297/2060 cut-off events. [2024-06-20 17:04:21,669 INFO L125 PetriNetUnfolderBase]: For 30482/30508 co-relation queries the response was YES. [2024-06-20 17:04:21,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11199 conditions, 2060 events. 1297/2060 cut-off events. For 30482/30508 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 10093 event pairs, 422 based on Foata normal form. 15/2074 useless extension candidates. Maximal degree in co-relation 11148. Up to 1689 conditions per place. [2024-06-20 17:04:21,681 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 98 selfloop transitions, 52 changer transitions 0/155 dead transitions. [2024-06-20 17:04:21,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 155 transitions, 1782 flow [2024-06-20 17:04:21,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:04:21,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:04:21,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-20 17:04:21,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-20 17:04:21,683 INFO L175 Difference]: Start difference. First operand has 111 places, 130 transitions, 1401 flow. Second operand 7 states and 126 transitions. [2024-06-20 17:04:21,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 155 transitions, 1782 flow [2024-06-20 17:04:21,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 155 transitions, 1652 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-20 17:04:21,710 INFO L231 Difference]: Finished difference. Result has 112 places, 131 transitions, 1396 flow [2024-06-20 17:04:21,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1275, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1396, PETRI_PLACES=112, PETRI_TRANSITIONS=131} [2024-06-20 17:04:21,710 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 69 predicate places. [2024-06-20 17:04:21,710 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 131 transitions, 1396 flow [2024-06-20 17:04:21,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:04:21,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:04:21,711 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:04:21,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-20 17:04:21,711 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)] === [2024-06-20 17:04:21,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:04:21,711 INFO L85 PathProgramCache]: Analyzing trace with hash -1684019893, now seen corresponding path program 1 times [2024-06-20 17:04:21,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:04:21,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602125419] [2024-06-20 17:04:21,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:04:21,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:04:21,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:04:24,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:04:24,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:04:24,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602125419] [2024-06-20 17:04:24,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602125419] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:04:24,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:04:24,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:04:24,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641616232] [2024-06-20 17:04:24,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:04:24,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:04:24,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:04:24,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:04:24,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:04:24,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:04:24,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 131 transitions, 1396 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:04:24,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:04:24,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:04:24,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:04:25,071 INFO L124 PetriNetUnfolderBase]: 1516/2415 cut-off events. [2024-06-20 17:04:25,072 INFO L125 PetriNetUnfolderBase]: For 38314/38322 co-relation queries the response was YES. [2024-06-20 17:04:25,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13302 conditions, 2415 events. 1516/2415 cut-off events. For 38314/38322 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 12362 event pairs, 278 based on Foata normal form. 14/2429 useless extension candidates. Maximal degree in co-relation 13250. Up to 1747 conditions per place. [2024-06-20 17:04:25,085 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 124 selfloop transitions, 59 changer transitions 0/188 dead transitions. [2024-06-20 17:04:25,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 188 transitions, 2070 flow [2024-06-20 17:04:25,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:04:25,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:04:25,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-20 17:04:25,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603174603174603 [2024-06-20 17:04:25,088 INFO L175 Difference]: Start difference. First operand has 112 places, 131 transitions, 1396 flow. Second operand 9 states and 174 transitions. [2024-06-20 17:04:25,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 188 transitions, 2070 flow [2024-06-20 17:04:25,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 188 transitions, 1987 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-20 17:04:25,117 INFO L231 Difference]: Finished difference. Result has 118 places, 138 transitions, 1542 flow [2024-06-20 17:04:25,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1313, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1542, PETRI_PLACES=118, PETRI_TRANSITIONS=138} [2024-06-20 17:04:25,117 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 75 predicate places. [2024-06-20 17:04:25,117 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 138 transitions, 1542 flow [2024-06-20 17:04:25,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:04:25,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:04:25,118 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:04:25,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-20 17:04:25,118 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)] === [2024-06-20 17:04:25,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:04:25,119 INFO L85 PathProgramCache]: Analyzing trace with hash 1960331901, now seen corresponding path program 2 times [2024-06-20 17:04:25,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:04:25,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341102500] [2024-06-20 17:04:25,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:04:25,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:04:25,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:04:27,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:04:27,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:04:27,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341102500] [2024-06-20 17:04:27,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341102500] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:04:27,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:04:27,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:04:27,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417290738] [2024-06-20 17:04:27,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:04:27,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:04:27,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:04:27,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:04:27,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:04:27,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:04:27,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 138 transitions, 1542 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:04:27,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:04:27,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:04:27,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:04:28,466 INFO L124 PetriNetUnfolderBase]: 1503/2396 cut-off events. [2024-06-20 17:04:28,466 INFO L125 PetriNetUnfolderBase]: For 42220/42228 co-relation queries the response was YES. [2024-06-20 17:04:28,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13628 conditions, 2396 events. 1503/2396 cut-off events. For 42220/42228 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 12291 event pairs, 375 based on Foata normal form. 14/2410 useless extension candidates. Maximal degree in co-relation 13573. Up to 2089 conditions per place. [2024-06-20 17:04:28,480 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 120 selfloop transitions, 59 changer transitions 0/184 dead transitions. [2024-06-20 17:04:28,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 184 transitions, 2072 flow [2024-06-20 17:04:28,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:04:28,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:04:28,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-20 17:04:28,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4417989417989418 [2024-06-20 17:04:28,482 INFO L175 Difference]: Start difference. First operand has 118 places, 138 transitions, 1542 flow. Second operand 9 states and 167 transitions. [2024-06-20 17:04:28,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 184 transitions, 2072 flow [2024-06-20 17:04:28,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 184 transitions, 1967 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-20 17:04:28,519 INFO L231 Difference]: Finished difference. Result has 122 places, 141 transitions, 1618 flow [2024-06-20 17:04:28,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1441, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1618, PETRI_PLACES=122, PETRI_TRANSITIONS=141} [2024-06-20 17:04:28,520 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 79 predicate places. [2024-06-20 17:04:28,520 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 141 transitions, 1618 flow [2024-06-20 17:04:28,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:04:28,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:04:28,520 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:04:28,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-20 17:04:28,521 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)] === [2024-06-20 17:04:28,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:04:28,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1244110237, now seen corresponding path program 3 times [2024-06-20 17:04:28,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:04:28,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819651746] [2024-06-20 17:04:28,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:04:28,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:04:28,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:04:30,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:04:30,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:04:30,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819651746] [2024-06-20 17:04:30,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819651746] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:04:30,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:04:30,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:04:30,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334796356] [2024-06-20 17:04:30,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:04:30,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:04:30,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:04:30,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:04:30,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:04:30,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:04:30,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 141 transitions, 1618 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:04:30,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:04:30,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:04:30,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:04:32,032 INFO L124 PetriNetUnfolderBase]: 1523/2422 cut-off events. [2024-06-20 17:04:32,032 INFO L125 PetriNetUnfolderBase]: For 46718/46720 co-relation queries the response was YES. [2024-06-20 17:04:32,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14125 conditions, 2422 events. 1523/2422 cut-off events. For 46718/46720 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 12401 event pairs, 392 based on Foata normal form. 4/2424 useless extension candidates. Maximal degree in co-relation 14068. Up to 2029 conditions per place. [2024-06-20 17:04:32,046 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 113 selfloop transitions, 58 changer transitions 0/176 dead transitions. [2024-06-20 17:04:32,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 176 transitions, 2086 flow [2024-06-20 17:04:32,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:04:32,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:04:32,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-20 17:04:32,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-20 17:04:32,048 INFO L175 Difference]: Start difference. First operand has 122 places, 141 transitions, 1618 flow. Second operand 8 states and 147 transitions. [2024-06-20 17:04:32,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 176 transitions, 2086 flow [2024-06-20 17:04:32,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 176 transitions, 1945 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-20 17:04:32,089 INFO L231 Difference]: Finished difference. Result has 123 places, 143 transitions, 1638 flow [2024-06-20 17:04:32,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1477, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1638, PETRI_PLACES=123, PETRI_TRANSITIONS=143} [2024-06-20 17:04:32,089 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 80 predicate places. [2024-06-20 17:04:32,089 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 143 transitions, 1638 flow [2024-06-20 17:04:32,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:04:32,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:04:32,090 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:04:32,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-20 17:04:32,090 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:04:32,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:04:32,091 INFO L85 PathProgramCache]: Analyzing trace with hash 782211883, now seen corresponding path program 1 times [2024-06-20 17:04:32,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:04:32,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252069737] [2024-06-20 17:04:32,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:04:32,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:04:32,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:04:34,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:04:34,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:04:34,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252069737] [2024-06-20 17:04:34,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252069737] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:04:34,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:04:34,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:04:34,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149168808] [2024-06-20 17:04:34,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:04:34,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:04:34,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:04:34,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:04:34,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:04:34,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:04:34,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 143 transitions, 1638 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:04:34,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:04:34,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:04:34,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:04:35,134 INFO L124 PetriNetUnfolderBase]: 1543/2459 cut-off events. [2024-06-20 17:04:35,134 INFO L125 PetriNetUnfolderBase]: For 50829/50837 co-relation queries the response was YES. [2024-06-20 17:04:35,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14492 conditions, 2459 events. 1543/2459 cut-off events. For 50829/50837 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 12649 event pairs, 379 based on Foata normal form. 12/2470 useless extension candidates. Maximal degree in co-relation 14434. Up to 2218 conditions per place. [2024-06-20 17:04:35,148 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 144 selfloop transitions, 26 changer transitions 0/175 dead transitions. [2024-06-20 17:04:35,148 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 175 transitions, 2092 flow [2024-06-20 17:04:35,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:04:35,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:04:35,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-20 17:04:35,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4387755102040816 [2024-06-20 17:04:35,151 INFO L175 Difference]: Start difference. First operand has 123 places, 143 transitions, 1638 flow. Second operand 7 states and 129 transitions. [2024-06-20 17:04:35,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 175 transitions, 2092 flow [2024-06-20 17:04:35,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 175 transitions, 1949 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-20 17:04:35,195 INFO L231 Difference]: Finished difference. Result has 124 places, 145 transitions, 1582 flow [2024-06-20 17:04:35,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1495, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1582, PETRI_PLACES=124, PETRI_TRANSITIONS=145} [2024-06-20 17:04:35,195 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 81 predicate places. [2024-06-20 17:04:35,195 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 145 transitions, 1582 flow [2024-06-20 17:04:35,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:04:35,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:04:35,196 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:04:35,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-20 17:04:35,196 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)] === [2024-06-20 17:04:35,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:04:35,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1367483771, now seen corresponding path program 4 times [2024-06-20 17:04:35,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:04:35,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729957147] [2024-06-20 17:04:35,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:04:35,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:04:35,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:04:37,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:04:37,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:04:37,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729957147] [2024-06-20 17:04:37,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729957147] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:04:37,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:04:37,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:04:37,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370645820] [2024-06-20 17:04:37,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:04:37,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:04:37,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:04:37,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:04:37,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:04:37,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:04:37,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 145 transitions, 1582 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:04:37,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:04:37,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:04:37,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:04:38,704 INFO L124 PetriNetUnfolderBase]: 1535/2423 cut-off events. [2024-06-20 17:04:38,704 INFO L125 PetriNetUnfolderBase]: For 53724/53732 co-relation queries the response was YES. [2024-06-20 17:04:38,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14339 conditions, 2423 events. 1535/2423 cut-off events. For 53724/53732 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 12254 event pairs, 432 based on Foata normal form. 6/2423 useless extension candidates. Maximal degree in co-relation 14280. Up to 2049 conditions per place. [2024-06-20 17:04:38,719 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 112 selfloop transitions, 60 changer transitions 0/177 dead transitions. [2024-06-20 17:04:38,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 177 transitions, 2050 flow [2024-06-20 17:04:38,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:04:38,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:04:38,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-20 17:04:38,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-20 17:04:38,723 INFO L175 Difference]: Start difference. First operand has 124 places, 145 transitions, 1582 flow. Second operand 8 states and 142 transitions. [2024-06-20 17:04:38,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 177 transitions, 2050 flow [2024-06-20 17:04:38,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 177 transitions, 1981 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-20 17:04:38,769 INFO L231 Difference]: Finished difference. Result has 127 places, 147 transitions, 1684 flow [2024-06-20 17:04:38,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1513, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1684, PETRI_PLACES=127, PETRI_TRANSITIONS=147} [2024-06-20 17:04:38,770 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 84 predicate places. [2024-06-20 17:04:38,770 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 147 transitions, 1684 flow [2024-06-20 17:04:38,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:04:38,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:04:38,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:04:38,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-20 17:04:38,771 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)] === [2024-06-20 17:04:38,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:04:38,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1449700739, now seen corresponding path program 2 times [2024-06-20 17:04:38,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:04:38,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315683840] [2024-06-20 17:04:38,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:04:38,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:04:38,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:04:40,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:04:40,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:04:40,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315683840] [2024-06-20 17:04:40,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315683840] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:04:40,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:04:40,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:04:40,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197777740] [2024-06-20 17:04:40,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:04:40,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:04:40,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:04:40,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:04:40,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:04:40,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:04:40,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 147 transitions, 1684 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:04:40,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:04:40,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:04:40,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:04:41,669 INFO L124 PetriNetUnfolderBase]: 1555/2485 cut-off events. [2024-06-20 17:04:41,670 INFO L125 PetriNetUnfolderBase]: For 59145/59177 co-relation queries the response was YES. [2024-06-20 17:04:41,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14913 conditions, 2485 events. 1555/2485 cut-off events. For 59145/59177 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 12885 event pairs, 397 based on Foata normal form. 36/2521 useless extension candidates. Maximal degree in co-relation 14853. Up to 2238 conditions per place. [2024-06-20 17:04:41,686 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 146 selfloop transitions, 25 changer transitions 0/176 dead transitions. [2024-06-20 17:04:41,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 176 transitions, 2138 flow [2024-06-20 17:04:41,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:04:41,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:04:41,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-20 17:04:41,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217687074829932 [2024-06-20 17:04:41,688 INFO L175 Difference]: Start difference. First operand has 127 places, 147 transitions, 1684 flow. Second operand 7 states and 124 transitions. [2024-06-20 17:04:41,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 176 transitions, 2138 flow [2024-06-20 17:04:41,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 176 transitions, 1985 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-20 17:04:41,740 INFO L231 Difference]: Finished difference. Result has 128 places, 149 transitions, 1622 flow [2024-06-20 17:04:41,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1531, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1622, PETRI_PLACES=128, PETRI_TRANSITIONS=149} [2024-06-20 17:04:41,740 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 85 predicate places. [2024-06-20 17:04:41,741 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 149 transitions, 1622 flow [2024-06-20 17:04:41,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:04:41,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:04:41,741 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:04:41,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-20 17:04:41,741 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)] === [2024-06-20 17:04:41,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:04:41,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1976037209, now seen corresponding path program 3 times [2024-06-20 17:04:41,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:04:41,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923028348] [2024-06-20 17:04:41,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:04:41,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:04:41,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:04:43,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:04:43,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:04:43,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923028348] [2024-06-20 17:04:43,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923028348] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:04:43,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:04:43,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:04:43,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071890496] [2024-06-20 17:04:43,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:04:43,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:04:43,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:04:43,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:04:43,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:04:43,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:04:43,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 149 transitions, 1622 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:04:43,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:04:43,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:04:43,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:04:44,498 INFO L124 PetriNetUnfolderBase]: 1547/2473 cut-off events. [2024-06-20 17:04:44,498 INFO L125 PetriNetUnfolderBase]: For 60828/60860 co-relation queries the response was YES. [2024-06-20 17:04:44,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14744 conditions, 2473 events. 1547/2473 cut-off events. For 60828/60860 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 12821 event pairs, 359 based on Foata normal form. 36/2509 useless extension candidates. Maximal degree in co-relation 14683. Up to 2154 conditions per place. [2024-06-20 17:04:44,516 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 144 selfloop transitions, 30 changer transitions 0/179 dead transitions. [2024-06-20 17:04:44,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 179 transitions, 2088 flow [2024-06-20 17:04:44,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:04:44,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:04:44,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-20 17:04:44,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42517006802721086 [2024-06-20 17:04:44,518 INFO L175 Difference]: Start difference. First operand has 128 places, 149 transitions, 1622 flow. Second operand 7 states and 125 transitions. [2024-06-20 17:04:44,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 179 transitions, 2088 flow [2024-06-20 17:04:44,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 179 transitions, 2015 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-20 17:04:44,569 INFO L231 Difference]: Finished difference. Result has 130 places, 151 transitions, 1654 flow [2024-06-20 17:04:44,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1549, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1654, PETRI_PLACES=130, PETRI_TRANSITIONS=151} [2024-06-20 17:04:44,570 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 87 predicate places. [2024-06-20 17:04:44,570 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 151 transitions, 1654 flow [2024-06-20 17:04:44,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:04:44,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:04:44,572 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:04:44,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-20 17:04:44,573 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:04:44,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:04:44,573 INFO L85 PathProgramCache]: Analyzing trace with hash 988220760, now seen corresponding path program 1 times [2024-06-20 17:04:44,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:04:44,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603754767] [2024-06-20 17:04:44,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:04:44,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:04:44,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:04:45,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:04:45,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:04:45,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603754767] [2024-06-20 17:04:45,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603754767] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:04:45,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:04:45,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:04:45,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322964929] [2024-06-20 17:04:45,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:04:45,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:04:45,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:04:45,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:04:45,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:04:45,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 17:04:45,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 151 transitions, 1654 flow. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:04:45,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:04:45,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 17:04:45,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:04:46,500 INFO L124 PetriNetUnfolderBase]: 1448/2356 cut-off events. [2024-06-20 17:04:46,500 INFO L125 PetriNetUnfolderBase]: For 62316/62332 co-relation queries the response was YES. [2024-06-20 17:04:46,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14306 conditions, 2356 events. 1448/2356 cut-off events. For 62316/62332 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 12434 event pairs, 385 based on Foata normal form. 15/2369 useless extension candidates. Maximal degree in co-relation 14244. Up to 2154 conditions per place. [2024-06-20 17:04:46,513 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 137 selfloop transitions, 10 changer transitions 0/164 dead transitions. [2024-06-20 17:04:46,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 164 transitions, 1994 flow [2024-06-20 17:04:46,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 17:04:46,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 17:04:46,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 89 transitions. [2024-06-20 17:04:46,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4238095238095238 [2024-06-20 17:04:46,515 INFO L175 Difference]: Start difference. First operand has 130 places, 151 transitions, 1654 flow. Second operand 5 states and 89 transitions. [2024-06-20 17:04:46,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 164 transitions, 1994 flow [2024-06-20 17:04:46,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 164 transitions, 1907 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-20 17:04:46,562 INFO L231 Difference]: Finished difference. Result has 130 places, 154 transitions, 1617 flow [2024-06-20 17:04:46,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1567, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1617, PETRI_PLACES=130, PETRI_TRANSITIONS=154} [2024-06-20 17:04:46,563 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 87 predicate places. [2024-06-20 17:04:46,563 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 154 transitions, 1617 flow [2024-06-20 17:04:46,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:04:46,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:04:46,564 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:04:46,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-20 17:04:46,564 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)] === [2024-06-20 17:04:46,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:04:46,564 INFO L85 PathProgramCache]: Analyzing trace with hash -894584386, now seen corresponding path program 1 times [2024-06-20 17:04:46,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:04:46,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160640181] [2024-06-20 17:04:46,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:04:46,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:04:46,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:04:48,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:04:48,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:04:48,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160640181] [2024-06-20 17:04:48,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160640181] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:04:48,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:04:48,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:04:48,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368719255] [2024-06-20 17:04:48,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:04:48,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:04:48,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:04:48,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:04:48,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:04:48,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:04:48,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 154 transitions, 1617 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:04:48,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:04:48,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:04:48,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:04:50,088 INFO L124 PetriNetUnfolderBase]: 1612/2580 cut-off events. [2024-06-20 17:04:50,088 INFO L125 PetriNetUnfolderBase]: For 71959/71967 co-relation queries the response was YES. [2024-06-20 17:04:50,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15563 conditions, 2580 events. 1612/2580 cut-off events. For 71959/71967 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 13374 event pairs, 274 based on Foata normal form. 26/2606 useless extension candidates. Maximal degree in co-relation 15500. Up to 1835 conditions per place. [2024-06-20 17:04:50,104 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 139 selfloop transitions, 63 changer transitions 0/207 dead transitions. [2024-06-20 17:04:50,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 207 transitions, 2317 flow [2024-06-20 17:04:50,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:04:50,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:04:50,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-20 17:04:50,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46296296296296297 [2024-06-20 17:04:50,106 INFO L175 Difference]: Start difference. First operand has 130 places, 154 transitions, 1617 flow. Second operand 9 states and 175 transitions. [2024-06-20 17:04:50,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 207 transitions, 2317 flow [2024-06-20 17:04:50,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 207 transitions, 2289 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-20 17:04:50,164 INFO L231 Difference]: Finished difference. Result has 136 places, 156 transitions, 1753 flow [2024-06-20 17:04:50,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1589, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1753, PETRI_PLACES=136, PETRI_TRANSITIONS=156} [2024-06-20 17:04:50,165 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 93 predicate places. [2024-06-20 17:04:50,165 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 156 transitions, 1753 flow [2024-06-20 17:04:50,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:04:50,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:04:50,165 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:04:50,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-20 17:04:50,166 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)] === [2024-06-20 17:04:50,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:04:50,166 INFO L85 PathProgramCache]: Analyzing trace with hash -805870756, now seen corresponding path program 2 times [2024-06-20 17:04:50,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:04:50,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049635601] [2024-06-20 17:04:50,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:04:50,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:04:50,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:04:52,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:04:52,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:04:52,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049635601] [2024-06-20 17:04:52,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049635601] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:04:52,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:04:52,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:04:52,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360925186] [2024-06-20 17:04:52,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:04:52,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:04:52,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:04:52,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:04:52,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:04:52,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:04:52,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 156 transitions, 1753 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:04:52,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:04:52,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:04:52,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:04:53,535 INFO L124 PetriNetUnfolderBase]: 1566/2510 cut-off events. [2024-06-20 17:04:53,535 INFO L125 PetriNetUnfolderBase]: For 70467/70475 co-relation queries the response was YES. [2024-06-20 17:04:53,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15077 conditions, 2510 events. 1566/2510 cut-off events. For 70467/70475 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 12957 event pairs, 356 based on Foata normal form. 32/2542 useless extension candidates. Maximal degree in co-relation 15013. Up to 2079 conditions per place. [2024-06-20 17:04:53,551 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 140 selfloop transitions, 58 changer transitions 0/203 dead transitions. [2024-06-20 17:04:53,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 203 transitions, 2312 flow [2024-06-20 17:04:53,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:04:53,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:04:53,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-20 17:04:53,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-20 17:04:53,553 INFO L175 Difference]: Start difference. First operand has 136 places, 156 transitions, 1753 flow. Second operand 9 states and 169 transitions. [2024-06-20 17:04:53,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 203 transitions, 2312 flow [2024-06-20 17:04:53,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 203 transitions, 2188 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-20 17:04:53,616 INFO L231 Difference]: Finished difference. Result has 139 places, 157 transitions, 1778 flow [2024-06-20 17:04:53,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1634, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1778, PETRI_PLACES=139, PETRI_TRANSITIONS=157} [2024-06-20 17:04:53,617 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 96 predicate places. [2024-06-20 17:04:53,617 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 157 transitions, 1778 flow [2024-06-20 17:04:53,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:04:53,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:04:53,618 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:04:53,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-20 17:04:53,618 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)] === [2024-06-20 17:04:53,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:04:53,618 INFO L85 PathProgramCache]: Analyzing trace with hash 22047344, now seen corresponding path program 3 times [2024-06-20 17:04:53,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:04:53,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67030769] [2024-06-20 17:04:53,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:04:53,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:04:53,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:04:56,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:04:56,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:04:56,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67030769] [2024-06-20 17:04:56,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67030769] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:04:56,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:04:56,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:04:56,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257513122] [2024-06-20 17:04:56,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:04:56,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:04:56,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:04:56,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:04:56,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:04:56,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:04:56,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 157 transitions, 1778 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:04:56,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:04:56,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:04:56,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:04:57,779 INFO L124 PetriNetUnfolderBase]: 1634/2632 cut-off events. [2024-06-20 17:04:57,780 INFO L125 PetriNetUnfolderBase]: For 73127/73129 co-relation queries the response was YES. [2024-06-20 17:04:57,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15671 conditions, 2632 events. 1634/2632 cut-off events. For 73127/73129 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 13877 event pairs, 393 based on Foata normal form. 16/2646 useless extension candidates. Maximal degree in co-relation 15606. Up to 2137 conditions per place. [2024-06-20 17:04:57,795 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 137 selfloop transitions, 57 changer transitions 0/199 dead transitions. [2024-06-20 17:04:57,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 199 transitions, 2318 flow [2024-06-20 17:04:57,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:04:57,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:04:57,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-20 17:04:57,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-20 17:04:57,797 INFO L175 Difference]: Start difference. First operand has 139 places, 157 transitions, 1778 flow. Second operand 9 states and 165 transitions. [2024-06-20 17:04:57,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 199 transitions, 2318 flow [2024-06-20 17:04:57,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 199 transitions, 2206 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-20 17:04:57,866 INFO L231 Difference]: Finished difference. Result has 141 places, 158 transitions, 1815 flow [2024-06-20 17:04:57,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1666, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1815, PETRI_PLACES=141, PETRI_TRANSITIONS=158} [2024-06-20 17:04:57,867 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 98 predicate places. [2024-06-20 17:04:57,867 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 158 transitions, 1815 flow [2024-06-20 17:04:57,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:04:57,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:04:57,868 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:04:57,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-20 17:04:57,868 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)] === [2024-06-20 17:04:57,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:04:57,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1526959652, now seen corresponding path program 4 times [2024-06-20 17:04:57,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:04:57,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174256917] [2024-06-20 17:04:57,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:04:57,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:04:57,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:05:00,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:05:00,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:05:00,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174256917] [2024-06-20 17:05:00,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174256917] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:05:00,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:05:00,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:05:00,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269752928] [2024-06-20 17:05:00,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:05:00,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:05:00,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:05:00,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:05:00,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:05:00,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:05:00,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 158 transitions, 1815 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:05:00,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:05:00,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:05:00,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:05:01,683 INFO L124 PetriNetUnfolderBase]: 1682/2716 cut-off events. [2024-06-20 17:05:01,683 INFO L125 PetriNetUnfolderBase]: For 77209/77211 co-relation queries the response was YES. [2024-06-20 17:05:01,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16265 conditions, 2716 events. 1682/2716 cut-off events. For 77209/77211 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 14491 event pairs, 387 based on Foata normal form. 12/2726 useless extension candidates. Maximal degree in co-relation 16199. Up to 2115 conditions per place. [2024-06-20 17:05:01,701 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 143 selfloop transitions, 60 changer transitions 0/208 dead transitions. [2024-06-20 17:05:01,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 208 transitions, 2403 flow [2024-06-20 17:05:01,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:05:01,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:05:01,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 183 transitions. [2024-06-20 17:05:01,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4357142857142857 [2024-06-20 17:05:01,703 INFO L175 Difference]: Start difference. First operand has 141 places, 158 transitions, 1815 flow. Second operand 10 states and 183 transitions. [2024-06-20 17:05:01,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 208 transitions, 2403 flow [2024-06-20 17:05:01,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 208 transitions, 2272 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-20 17:05:01,777 INFO L231 Difference]: Finished difference. Result has 144 places, 159 transitions, 1840 flow [2024-06-20 17:05:01,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1684, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1840, PETRI_PLACES=144, PETRI_TRANSITIONS=159} [2024-06-20 17:05:01,777 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 101 predicate places. [2024-06-20 17:05:01,777 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 159 transitions, 1840 flow [2024-06-20 17:05:01,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:05:01,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:05:01,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:05:01,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-20 17:05:01,778 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)] === [2024-06-20 17:05:01,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:05:01,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1521449402, now seen corresponding path program 5 times [2024-06-20 17:05:01,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:05:01,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353250402] [2024-06-20 17:05:01,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:05:01,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:05:01,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:05:03,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:05:03,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:05:03,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353250402] [2024-06-20 17:05:03,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353250402] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:05:03,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:05:03,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:05:03,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651662756] [2024-06-20 17:05:03,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:05:03,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:05:03,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:05:03,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:05:03,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:05:03,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:05:03,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 159 transitions, 1840 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:05:03,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:05:03,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:05:03,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:05:05,213 INFO L124 PetriNetUnfolderBase]: 1750/2847 cut-off events. [2024-06-20 17:05:05,213 INFO L125 PetriNetUnfolderBase]: For 84112/84114 co-relation queries the response was YES. [2024-06-20 17:05:05,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16896 conditions, 2847 events. 1750/2847 cut-off events. For 84112/84114 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 15561 event pairs, 423 based on Foata normal form. 16/2862 useless extension candidates. Maximal degree in co-relation 16829. Up to 2337 conditions per place. [2024-06-20 17:05:05,231 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 137 selfloop transitions, 54 changer transitions 0/196 dead transitions. [2024-06-20 17:05:05,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 196 transitions, 2364 flow [2024-06-20 17:05:05,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:05:05,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:05:05,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-20 17:05:05,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-20 17:05:05,233 INFO L175 Difference]: Start difference. First operand has 144 places, 159 transitions, 1840 flow. Second operand 8 states and 149 transitions. [2024-06-20 17:05:05,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 196 transitions, 2364 flow [2024-06-20 17:05:05,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 196 transitions, 2222 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-20 17:05:05,306 INFO L231 Difference]: Finished difference. Result has 144 places, 160 transitions, 1845 flow [2024-06-20 17:05:05,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1698, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1845, PETRI_PLACES=144, PETRI_TRANSITIONS=160} [2024-06-20 17:05:05,307 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 101 predicate places. [2024-06-20 17:05:05,307 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 160 transitions, 1845 flow [2024-06-20 17:05:05,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:05:05,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:05:05,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:05:05,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-20 17:05:05,307 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:05:05,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:05:05,308 INFO L85 PathProgramCache]: Analyzing trace with hash -81561476, now seen corresponding path program 1 times [2024-06-20 17:05:05,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:05:05,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849727160] [2024-06-20 17:05:05,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:05:05,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:05:05,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:05:07,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:05:07,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:05:07,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849727160] [2024-06-20 17:05:07,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849727160] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:05:07,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:05:07,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:05:07,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863049373] [2024-06-20 17:05:07,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:05:07,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:05:07,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:05:07,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:05:07,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:05:07,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:05:07,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 160 transitions, 1845 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:05:07,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:05:07,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:05:07,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:05:08,945 INFO L124 PetriNetUnfolderBase]: 1894/3103 cut-off events. [2024-06-20 17:05:08,946 INFO L125 PetriNetUnfolderBase]: For 97347/97349 co-relation queries the response was YES. [2024-06-20 17:05:08,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18612 conditions, 3103 events. 1894/3103 cut-off events. For 97347/97349 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 17489 event pairs, 447 based on Foata normal form. 12/3114 useless extension candidates. Maximal degree in co-relation 18544. Up to 2091 conditions per place. [2024-06-20 17:05:08,965 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 139 selfloop transitions, 59 changer transitions 0/203 dead transitions. [2024-06-20 17:05:08,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 203 transitions, 2555 flow [2024-06-20 17:05:08,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:05:08,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:05:08,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-20 17:05:08,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45535714285714285 [2024-06-20 17:05:08,967 INFO L175 Difference]: Start difference. First operand has 144 places, 160 transitions, 1845 flow. Second operand 8 states and 153 transitions. [2024-06-20 17:05:08,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 203 transitions, 2555 flow [2024-06-20 17:05:09,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 203 transitions, 2426 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-20 17:05:09,058 INFO L231 Difference]: Finished difference. Result has 146 places, 162 transitions, 1906 flow [2024-06-20 17:05:09,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1716, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1906, PETRI_PLACES=146, PETRI_TRANSITIONS=162} [2024-06-20 17:05:09,059 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 103 predicate places. [2024-06-20 17:05:09,059 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 162 transitions, 1906 flow [2024-06-20 17:05:09,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:05:09,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:05:09,059 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:05:09,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-20 17:05:09,059 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:05:09,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:05:09,060 INFO L85 PathProgramCache]: Analyzing trace with hash 126113948, now seen corresponding path program 6 times [2024-06-20 17:05:09,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:05:09,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728384243] [2024-06-20 17:05:09,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:05:09,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:05:09,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:05:11,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:05:11,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:05:11,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728384243] [2024-06-20 17:05:11,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728384243] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:05:11,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:05:11,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:05:11,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091031112] [2024-06-20 17:05:11,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:05:11,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:05:11,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:05:11,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:05:11,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:05:11,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:05:11,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 162 transitions, 1906 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:05:11,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:05:11,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:05:11,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:05:13,163 INFO L124 PetriNetUnfolderBase]: 1866/3029 cut-off events. [2024-06-20 17:05:13,164 INFO L125 PetriNetUnfolderBase]: For 96065/96073 co-relation queries the response was YES. [2024-06-20 17:05:13,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17920 conditions, 3029 events. 1866/3029 cut-off events. For 96065/96073 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 16872 event pairs, 486 based on Foata normal form. 18/3042 useless extension candidates. Maximal degree in co-relation 17851. Up to 2537 conditions per place. [2024-06-20 17:05:13,258 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 136 selfloop transitions, 59 changer transitions 0/200 dead transitions. [2024-06-20 17:05:13,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 200 transitions, 2414 flow [2024-06-20 17:05:13,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:05:13,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:05:13,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-20 17:05:13,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-20 17:05:13,260 INFO L175 Difference]: Start difference. First operand has 146 places, 162 transitions, 1906 flow. Second operand 9 states and 160 transitions. [2024-06-20 17:05:13,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 200 transitions, 2414 flow [2024-06-20 17:05:13,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 200 transitions, 2306 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-20 17:05:13,352 INFO L231 Difference]: Finished difference. Result has 151 places, 162 transitions, 1923 flow [2024-06-20 17:05:13,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1798, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1923, PETRI_PLACES=151, PETRI_TRANSITIONS=162} [2024-06-20 17:05:13,353 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 108 predicate places. [2024-06-20 17:05:13,353 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 162 transitions, 1923 flow [2024-06-20 17:05:13,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:05:13,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:05:13,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:05:13,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-20 17:05:13,353 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:05:13,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:05:13,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1990835950, now seen corresponding path program 7 times [2024-06-20 17:05:13,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:05:13,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299162266] [2024-06-20 17:05:13,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:05:13,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:05:13,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:05:15,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:05:15,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:05:15,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299162266] [2024-06-20 17:05:15,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299162266] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:05:15,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:05:15,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:05:15,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180596913] [2024-06-20 17:05:15,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:05:15,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:05:15,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:05:15,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:05:15,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:05:15,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:05:15,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 162 transitions, 1923 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:05:15,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:05:15,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:05:15,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:05:16,568 INFO L124 PetriNetUnfolderBase]: 1934/3188 cut-off events. [2024-06-20 17:05:16,571 INFO L125 PetriNetUnfolderBase]: For 100344/100370 co-relation queries the response was YES. [2024-06-20 17:05:16,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18632 conditions, 3188 events. 1934/3188 cut-off events. For 100344/100370 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 18290 event pairs, 505 based on Foata normal form. 29/3216 useless extension candidates. Maximal degree in co-relation 18561. Up to 2653 conditions per place. [2024-06-20 17:05:16,590 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 138 selfloop transitions, 53 changer transitions 0/196 dead transitions. [2024-06-20 17:05:16,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 196 transitions, 2443 flow [2024-06-20 17:05:16,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:05:16,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:05:16,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-20 17:05:16,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-20 17:05:16,611 INFO L175 Difference]: Start difference. First operand has 151 places, 162 transitions, 1923 flow. Second operand 8 states and 144 transitions. [2024-06-20 17:05:16,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 196 transitions, 2443 flow [2024-06-20 17:05:16,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 196 transitions, 2320 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-20 17:05:16,710 INFO L231 Difference]: Finished difference. Result has 152 places, 163 transitions, 1949 flow [2024-06-20 17:05:16,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1800, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1949, PETRI_PLACES=152, PETRI_TRANSITIONS=163} [2024-06-20 17:05:16,711 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 109 predicate places. [2024-06-20 17:05:16,711 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 163 transitions, 1949 flow [2024-06-20 17:05:16,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:05:16,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:05:16,711 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:05:16,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-20 17:05:16,712 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:05:16,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:05:16,712 INFO L85 PathProgramCache]: Analyzing trace with hash 125966078, now seen corresponding path program 8 times [2024-06-20 17:05:16,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:05:16,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227080826] [2024-06-20 17:05:16,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:05:16,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:05:16,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:05:19,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:05:19,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:05:19,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227080826] [2024-06-20 17:05:19,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227080826] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:05:19,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:05:19,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:05:19,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383886748] [2024-06-20 17:05:19,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:05:19,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:05:19,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:05:19,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:05:19,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:05:19,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:05:19,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 163 transitions, 1949 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:05:19,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:05:19,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:05:19,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:05:20,945 INFO L124 PetriNetUnfolderBase]: 1954/3209 cut-off events. [2024-06-20 17:05:20,945 INFO L125 PetriNetUnfolderBase]: For 101684/101692 co-relation queries the response was YES. [2024-06-20 17:05:20,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18745 conditions, 3209 events. 1954/3209 cut-off events. For 101684/101692 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 18359 event pairs, 502 based on Foata normal form. 14/3218 useless extension candidates. Maximal degree in co-relation 18673. Up to 2587 conditions per place. [2024-06-20 17:05:20,962 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 143 selfloop transitions, 62 changer transitions 0/210 dead transitions. [2024-06-20 17:05:20,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 210 transitions, 2541 flow [2024-06-20 17:05:20,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:05:20,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:05:20,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 178 transitions. [2024-06-20 17:05:20,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4238095238095238 [2024-06-20 17:05:20,964 INFO L175 Difference]: Start difference. First operand has 152 places, 163 transitions, 1949 flow. Second operand 10 states and 178 transitions. [2024-06-20 17:05:20,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 210 transitions, 2541 flow [2024-06-20 17:05:21,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 210 transitions, 2410 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-20 17:05:21,054 INFO L231 Difference]: Finished difference. Result has 156 places, 164 transitions, 1986 flow [2024-06-20 17:05:21,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1818, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1986, PETRI_PLACES=156, PETRI_TRANSITIONS=164} [2024-06-20 17:05:21,054 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 113 predicate places. [2024-06-20 17:05:21,055 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 164 transitions, 1986 flow [2024-06-20 17:05:21,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:05:21,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:05:21,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:05:21,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-20 17:05:21,055 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:05:21,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:05:21,056 INFO L85 PathProgramCache]: Analyzing trace with hash -2047415634, now seen corresponding path program 2 times [2024-06-20 17:05:21,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:05:21,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841774012] [2024-06-20 17:05:21,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:05:21,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:05:21,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:05:23,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:05:23,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:05:23,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841774012] [2024-06-20 17:05:23,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841774012] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:05:23,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:05:23,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:05:23,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255011497] [2024-06-20 17:05:23,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:05:23,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:05:23,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:05:23,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:05:23,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:05:23,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:05:23,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 164 transitions, 1986 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:05:23,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:05:23,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:05:23,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:05:24,492 INFO L124 PetriNetUnfolderBase]: 2002/3324 cut-off events. [2024-06-20 17:05:24,493 INFO L125 PetriNetUnfolderBase]: For 107281/107307 co-relation queries the response was YES. [2024-06-20 17:05:24,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19228 conditions, 3324 events. 2002/3324 cut-off events. For 107281/107307 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 19417 event pairs, 515 based on Foata normal form. 25/3348 useless extension candidates. Maximal degree in co-relation 19155. Up to 2671 conditions per place. [2024-06-20 17:05:24,515 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 141 selfloop transitions, 55 changer transitions 0/201 dead transitions. [2024-06-20 17:05:24,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 201 transitions, 2532 flow [2024-06-20 17:05:24,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:05:24,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:05:24,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-20 17:05:24,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-20 17:05:24,517 INFO L175 Difference]: Start difference. First operand has 156 places, 164 transitions, 1986 flow. Second operand 8 states and 147 transitions. [2024-06-20 17:05:24,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 201 transitions, 2532 flow [2024-06-20 17:05:24,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 201 transitions, 2378 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-20 17:05:24,606 INFO L231 Difference]: Finished difference. Result has 156 places, 165 transitions, 1988 flow [2024-06-20 17:05:24,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1832, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1988, PETRI_PLACES=156, PETRI_TRANSITIONS=165} [2024-06-20 17:05:24,608 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 113 predicate places. [2024-06-20 17:05:24,608 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 165 transitions, 1988 flow [2024-06-20 17:05:24,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:05:24,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:05:24,608 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:05:24,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-20 17:05:24,609 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:05:24,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:05:24,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1127610132, now seen corresponding path program 3 times [2024-06-20 17:05:24,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:05:24,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338869540] [2024-06-20 17:05:24,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:05:24,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:05:24,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:05:26,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:05:26,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:05:26,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338869540] [2024-06-20 17:05:26,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338869540] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:05:26,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:05:26,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:05:26,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153728830] [2024-06-20 17:05:26,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:05:26,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:05:26,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:05:26,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:05:26,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:05:26,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:05:26,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 165 transitions, 1988 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:05:26,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:05:26,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:05:26,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:05:28,034 INFO L124 PetriNetUnfolderBase]: 1982/3292 cut-off events. [2024-06-20 17:05:28,034 INFO L125 PetriNetUnfolderBase]: For 102978/103004 co-relation queries the response was YES. [2024-06-20 17:05:28,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18552 conditions, 3292 events. 1982/3292 cut-off events. For 102978/103004 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 19150 event pairs, 450 based on Foata normal form. 25/3316 useless extension candidates. Maximal degree in co-relation 18478. Up to 1939 conditions per place. [2024-06-20 17:05:28,056 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 132 selfloop transitions, 64 changer transitions 0/201 dead transitions. [2024-06-20 17:05:28,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 201 transitions, 2426 flow [2024-06-20 17:05:28,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:05:28,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:05:28,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-20 17:05:28,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-20 17:05:28,058 INFO L175 Difference]: Start difference. First operand has 156 places, 165 transitions, 1988 flow. Second operand 8 states and 146 transitions. [2024-06-20 17:05:28,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 201 transitions, 2426 flow [2024-06-20 17:05:28,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 201 transitions, 2284 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-20 17:05:28,172 INFO L231 Difference]: Finished difference. Result has 157 places, 164 transitions, 1906 flow [2024-06-20 17:05:28,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1774, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1906, PETRI_PLACES=157, PETRI_TRANSITIONS=164} [2024-06-20 17:05:28,173 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 114 predicate places. [2024-06-20 17:05:28,173 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 164 transitions, 1906 flow [2024-06-20 17:05:28,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:05:28,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:05:28,173 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:05:28,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-20 17:05:28,174 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)] === [2024-06-20 17:05:28,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:05:28,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1801850170, now seen corresponding path program 1 times [2024-06-20 17:05:28,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:05:28,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931113630] [2024-06-20 17:05:28,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:05:28,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:05:28,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:05:29,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:05:29,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:05:29,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931113630] [2024-06-20 17:05:29,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931113630] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:05:29,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:05:29,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:05:29,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914923087] [2024-06-20 17:05:29,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:05:29,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:05:29,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:05:29,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:05:29,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:05:29,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:05:29,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 164 transitions, 1906 flow. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:05:29,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:05:29,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:05:29,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:05:30,385 INFO L124 PetriNetUnfolderBase]: 1987/3294 cut-off events. [2024-06-20 17:05:30,385 INFO L125 PetriNetUnfolderBase]: For 98857/98859 co-relation queries the response was YES. [2024-06-20 17:05:30,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18645 conditions, 3294 events. 1987/3294 cut-off events. For 98857/98859 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 19213 event pairs, 489 based on Foata normal form. 1/3294 useless extension candidates. Maximal degree in co-relation 18570. Up to 3084 conditions per place. [2024-06-20 17:05:30,409 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 164 selfloop transitions, 21 changer transitions 0/190 dead transitions. [2024-06-20 17:05:30,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 190 transitions, 2590 flow [2024-06-20 17:05:30,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:05:30,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:05:30,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 104 transitions. [2024-06-20 17:05:30,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-20 17:05:30,411 INFO L175 Difference]: Start difference. First operand has 157 places, 164 transitions, 1906 flow. Second operand 6 states and 104 transitions. [2024-06-20 17:05:30,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 190 transitions, 2590 flow [2024-06-20 17:05:30,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 190 transitions, 2391 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-20 17:05:30,516 INFO L231 Difference]: Finished difference. Result has 157 places, 173 transitions, 1897 flow [2024-06-20 17:05:30,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1707, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1897, PETRI_PLACES=157, PETRI_TRANSITIONS=173} [2024-06-20 17:05:30,517 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 114 predicate places. [2024-06-20 17:05:30,517 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 173 transitions, 1897 flow [2024-06-20 17:05:30,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:05:30,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:05:30,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:05:30,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-20 17:05:30,518 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)] === [2024-06-20 17:05:30,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:05:30,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1943729318, now seen corresponding path program 2 times [2024-06-20 17:05:30,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:05:30,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80387884] [2024-06-20 17:05:30,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:05:30,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:05:30,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:05:31,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:05:31,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:05:31,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80387884] [2024-06-20 17:05:31,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80387884] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:05:31,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:05:31,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:05:31,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791173594] [2024-06-20 17:05:31,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:05:31,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:05:31,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:05:31,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:05:31,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:05:31,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:05:31,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 173 transitions, 1897 flow. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:05:31,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:05:31,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:05:31,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:05:32,689 INFO L124 PetriNetUnfolderBase]: 1992/3307 cut-off events. [2024-06-20 17:05:32,689 INFO L125 PetriNetUnfolderBase]: For 101236/101238 co-relation queries the response was YES. [2024-06-20 17:05:32,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18522 conditions, 3307 events. 1992/3307 cut-off events. For 101236/101238 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 19428 event pairs, 484 based on Foata normal form. 1/3308 useless extension candidates. Maximal degree in co-relation 18446. Up to 3100 conditions per place. [2024-06-20 17:05:32,712 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 172 selfloop transitions, 19 changer transitions 0/196 dead transitions. [2024-06-20 17:05:32,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 196 transitions, 2452 flow [2024-06-20 17:05:32,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:05:32,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:05:32,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-20 17:05:32,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4246031746031746 [2024-06-20 17:05:32,714 INFO L175 Difference]: Start difference. First operand has 157 places, 173 transitions, 1897 flow. Second operand 6 states and 107 transitions. [2024-06-20 17:05:32,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 196 transitions, 2452 flow [2024-06-20 17:05:32,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 196 transitions, 2362 flow, removed 44 selfloop flow, removed 1 redundant places. [2024-06-20 17:05:32,831 INFO L231 Difference]: Finished difference. Result has 163 places, 176 transitions, 1910 flow [2024-06-20 17:05:32,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1813, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1910, PETRI_PLACES=163, PETRI_TRANSITIONS=176} [2024-06-20 17:05:32,832 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 120 predicate places. [2024-06-20 17:05:32,832 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 176 transitions, 1910 flow [2024-06-20 17:05:32,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:05:32,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:05:32,832 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:05:32,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-20 17:05:32,833 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)] === [2024-06-20 17:05:32,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:05:32,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1943737254, now seen corresponding path program 1 times [2024-06-20 17:05:32,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:05:32,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283844259] [2024-06-20 17:05:32,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:05:32,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:05:32,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:05:34,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:05:34,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:05:34,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283844259] [2024-06-20 17:05:34,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283844259] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:05:34,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:05:34,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:05:34,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335025487] [2024-06-20 17:05:34,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:05:34,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:05:34,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:05:34,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:05:34,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:05:34,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 17:05:34,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 176 transitions, 1910 flow. Second operand has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:05:34,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:05:34,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 17:05:34,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:05:35,614 INFO L124 PetriNetUnfolderBase]: 1858/3127 cut-off events. [2024-06-20 17:05:35,615 INFO L125 PetriNetUnfolderBase]: For 103395/103411 co-relation queries the response was YES. [2024-06-20 17:05:35,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17610 conditions, 3127 events. 1858/3127 cut-off events. For 103395/103411 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 18618 event pairs, 459 based on Foata normal form. 15/3116 useless extension candidates. Maximal degree in co-relation 17530. Up to 2883 conditions per place. [2024-06-20 17:05:35,636 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 160 selfloop transitions, 13 changer transitions 0/190 dead transitions. [2024-06-20 17:05:35,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 190 transitions, 2308 flow [2024-06-20 17:05:35,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:05:35,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:05:35,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-20 17:05:35,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4007936507936508 [2024-06-20 17:05:35,638 INFO L175 Difference]: Start difference. First operand has 163 places, 176 transitions, 1910 flow. Second operand 6 states and 101 transitions. [2024-06-20 17:05:35,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 190 transitions, 2308 flow [2024-06-20 17:05:35,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 190 transitions, 2274 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-20 17:05:35,748 INFO L231 Difference]: Finished difference. Result has 165 places, 179 transitions, 1936 flow [2024-06-20 17:05:35,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1876, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1936, PETRI_PLACES=165, PETRI_TRANSITIONS=179} [2024-06-20 17:05:35,749 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 122 predicate places. [2024-06-20 17:05:35,749 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 179 transitions, 1936 flow [2024-06-20 17:05:35,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:05:35,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:05:35,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:05:35,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-20 17:05:35,749 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)] === [2024-06-20 17:05:35,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:05:35,750 INFO L85 PathProgramCache]: Analyzing trace with hash -591215533, now seen corresponding path program 1 times [2024-06-20 17:05:35,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:05:35,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88260782] [2024-06-20 17:05:35,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:05:35,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:05:35,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:05:37,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:05:37,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:05:37,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88260782] [2024-06-20 17:05:37,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88260782] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:05:37,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:05:37,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:05:37,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820852849] [2024-06-20 17:05:37,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:05:37,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:05:37,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:05:37,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:05:37,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:05:37,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 17:05:37,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 179 transitions, 1936 flow. Second operand has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:05:37,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:05:37,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 17:05:37,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:05:38,682 INFO L124 PetriNetUnfolderBase]: 1883/3164 cut-off events. [2024-06-20 17:05:38,682 INFO L125 PetriNetUnfolderBase]: For 107011/107027 co-relation queries the response was YES. [2024-06-20 17:05:38,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18100 conditions, 3164 events. 1883/3164 cut-off events. For 107011/107027 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 18734 event pairs, 445 based on Foata normal form. 16/3154 useless extension candidates. Maximal degree in co-relation 18019. Up to 2842 conditions per place. [2024-06-20 17:05:38,706 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 151 selfloop transitions, 38 changer transitions 0/206 dead transitions. [2024-06-20 17:05:38,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 206 transitions, 2447 flow [2024-06-20 17:05:38,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:05:38,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:05:38,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-20 17:05:38,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41836734693877553 [2024-06-20 17:05:38,716 INFO L175 Difference]: Start difference. First operand has 165 places, 179 transitions, 1936 flow. Second operand 7 states and 123 transitions. [2024-06-20 17:05:38,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 206 transitions, 2447 flow [2024-06-20 17:05:38,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 206 transitions, 2409 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-20 17:05:38,846 INFO L231 Difference]: Finished difference. Result has 168 places, 187 transitions, 2071 flow [2024-06-20 17:05:38,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1898, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2071, PETRI_PLACES=168, PETRI_TRANSITIONS=187} [2024-06-20 17:05:38,847 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 125 predicate places. [2024-06-20 17:05:38,847 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 187 transitions, 2071 flow [2024-06-20 17:05:38,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:05:38,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:05:38,848 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:05:38,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-20 17:05:38,848 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)] === [2024-06-20 17:05:38,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:05:38,848 INFO L85 PathProgramCache]: Analyzing trace with hash 126299637, now seen corresponding path program 2 times [2024-06-20 17:05:38,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:05:38,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883811142] [2024-06-20 17:05:38,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:05:38,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:05:38,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:05:41,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:05:41,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:05:41,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883811142] [2024-06-20 17:05:41,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883811142] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:05:41,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:05:41,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:05:41,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895492079] [2024-06-20 17:05:41,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:05:41,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:05:41,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:05:41,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:05:41,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:05:41,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 17:05:41,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 187 transitions, 2071 flow. Second operand has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:05:41,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:05:41,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 17:05:41,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:05:42,405 INFO L124 PetriNetUnfolderBase]: 1891/3164 cut-off events. [2024-06-20 17:05:42,405 INFO L125 PetriNetUnfolderBase]: For 112419/112433 co-relation queries the response was YES. [2024-06-20 17:05:42,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18627 conditions, 3164 events. 1891/3164 cut-off events. For 112419/112433 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 18684 event pairs, 457 based on Foata normal form. 15/3148 useless extension candidates. Maximal degree in co-relation 18545. Up to 2840 conditions per place. [2024-06-20 17:05:42,428 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 145 selfloop transitions, 43 changer transitions 0/205 dead transitions. [2024-06-20 17:05:42,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 205 transitions, 2621 flow [2024-06-20 17:05:42,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:05:42,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:05:42,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 104 transitions. [2024-06-20 17:05:42,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-20 17:05:42,430 INFO L175 Difference]: Start difference. First operand has 168 places, 187 transitions, 2071 flow. Second operand 6 states and 104 transitions. [2024-06-20 17:05:42,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 205 transitions, 2621 flow [2024-06-20 17:05:42,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 205 transitions, 2555 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-20 17:05:42,553 INFO L231 Difference]: Finished difference. Result has 171 places, 193 transitions, 2163 flow [2024-06-20 17:05:42,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2005, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2163, PETRI_PLACES=171, PETRI_TRANSITIONS=193} [2024-06-20 17:05:42,553 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 128 predicate places. [2024-06-20 17:05:42,553 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 193 transitions, 2163 flow [2024-06-20 17:05:42,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:05:42,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:05:42,554 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:05:42,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-20 17:05:42,554 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)] === [2024-06-20 17:05:42,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:05:42,554 INFO L85 PathProgramCache]: Analyzing trace with hash 792624467, now seen corresponding path program 3 times [2024-06-20 17:05:42,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:05:42,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076161076] [2024-06-20 17:05:42,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:05:42,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:05:42,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:05:44,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:05:44,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:05:44,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076161076] [2024-06-20 17:05:44,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076161076] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:05:44,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:05:44,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:05:44,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149615467] [2024-06-20 17:05:44,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:05:44,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:05:44,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:05:44,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:05:44,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:05:44,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 17:05:44,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 193 transitions, 2163 flow. Second operand has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:05:44,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:05:44,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 17:05:44,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:05:45,571 INFO L124 PetriNetUnfolderBase]: 1899/3188 cut-off events. [2024-06-20 17:05:45,571 INFO L125 PetriNetUnfolderBase]: For 118903/118914 co-relation queries the response was YES. [2024-06-20 17:05:45,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19135 conditions, 3188 events. 1899/3188 cut-off events. For 118903/118914 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 18886 event pairs, 448 based on Foata normal form. 11/3173 useless extension candidates. Maximal degree in co-relation 19052. Up to 2849 conditions per place. [2024-06-20 17:05:45,595 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 158 selfloop transitions, 41 changer transitions 0/216 dead transitions. [2024-06-20 17:05:45,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 216 transitions, 2725 flow [2024-06-20 17:05:45,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:05:45,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:05:45,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-20 17:05:45,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217687074829932 [2024-06-20 17:05:45,597 INFO L175 Difference]: Start difference. First operand has 171 places, 193 transitions, 2163 flow. Second operand 7 states and 124 transitions. [2024-06-20 17:05:45,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 216 transitions, 2725 flow [2024-06-20 17:05:45,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 216 transitions, 2655 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-06-20 17:05:45,732 INFO L231 Difference]: Finished difference. Result has 177 places, 195 transitions, 2222 flow [2024-06-20 17:05:45,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2093, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2222, PETRI_PLACES=177, PETRI_TRANSITIONS=195} [2024-06-20 17:05:45,733 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 134 predicate places. [2024-06-20 17:05:45,734 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 195 transitions, 2222 flow [2024-06-20 17:05:45,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:05:45,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:05:45,734 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:05:45,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-20 17:05:45,734 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)] === [2024-06-20 17:05:45,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:05:45,735 INFO L85 PathProgramCache]: Analyzing trace with hash 314936413, now seen corresponding path program 1 times [2024-06-20 17:05:45,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:05:45,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772297322] [2024-06-20 17:05:45,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:05:45,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:05:45,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:05:47,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:05:47,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:05:47,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772297322] [2024-06-20 17:05:47,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772297322] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:05:47,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:05:47,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:05:47,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109988213] [2024-06-20 17:05:47,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:05:47,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:05:47,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:05:47,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:05:47,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:05:47,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:05:47,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 195 transitions, 2222 flow. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:05:47,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:05:47,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:05:47,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:05:48,145 INFO L124 PetriNetUnfolderBase]: 2031/3370 cut-off events. [2024-06-20 17:05:48,146 INFO L125 PetriNetUnfolderBase]: For 124187/124193 co-relation queries the response was YES. [2024-06-20 17:05:48,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20290 conditions, 3370 events. 2031/3370 cut-off events. For 124187/124193 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 19725 event pairs, 488 based on Foata normal form. 5/3375 useless extension candidates. Maximal degree in co-relation 20204. Up to 3146 conditions per place. [2024-06-20 17:05:48,167 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 184 selfloop transitions, 25 changer transitions 0/214 dead transitions. [2024-06-20 17:05:48,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 214 transitions, 2811 flow [2024-06-20 17:05:48,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:05:48,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:05:48,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 103 transitions. [2024-06-20 17:05:48,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4087301587301587 [2024-06-20 17:05:48,168 INFO L175 Difference]: Start difference. First operand has 177 places, 195 transitions, 2222 flow. Second operand 6 states and 103 transitions. [2024-06-20 17:05:48,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 214 transitions, 2811 flow [2024-06-20 17:05:48,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 214 transitions, 2721 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-20 17:05:48,316 INFO L231 Difference]: Finished difference. Result has 178 places, 198 transitions, 2229 flow [2024-06-20 17:05:48,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2132, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2229, PETRI_PLACES=178, PETRI_TRANSITIONS=198} [2024-06-20 17:05:48,317 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 135 predicate places. [2024-06-20 17:05:48,317 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 198 transitions, 2229 flow [2024-06-20 17:05:48,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:05:48,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:05:48,317 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:05:48,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-20 17:05:48,318 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)] === [2024-06-20 17:05:48,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:05:48,318 INFO L85 PathProgramCache]: Analyzing trace with hash -21366027, now seen corresponding path program 1 times [2024-06-20 17:05:48,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:05:48,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382370722] [2024-06-20 17:05:48,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:05:48,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:05:48,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:05:49,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:05:49,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:05:49,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382370722] [2024-06-20 17:05:49,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382370722] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:05:49,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:05:49,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:05:49,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899025187] [2024-06-20 17:05:49,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:05:49,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:05:49,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:05:49,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:05:49,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:05:49,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:05:49,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 198 transitions, 2229 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:05:49,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:05:49,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:05:49,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:05:50,799 INFO L124 PetriNetUnfolderBase]: 2036/3371 cut-off events. [2024-06-20 17:05:50,799 INFO L125 PetriNetUnfolderBase]: For 128818/128820 co-relation queries the response was YES. [2024-06-20 17:05:50,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20375 conditions, 3371 events. 2036/3371 cut-off events. For 128818/128820 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 19656 event pairs, 488 based on Foata normal form. 1/3371 useless extension candidates. Maximal degree in co-relation 20288. Up to 3150 conditions per place. [2024-06-20 17:05:50,823 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 183 selfloop transitions, 30 changer transitions 0/218 dead transitions. [2024-06-20 17:05:50,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 218 transitions, 2835 flow [2024-06-20 17:05:50,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:05:50,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:05:50,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-20 17:05:50,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.391156462585034 [2024-06-20 17:05:50,825 INFO L175 Difference]: Start difference. First operand has 178 places, 198 transitions, 2229 flow. Second operand 7 states and 115 transitions. [2024-06-20 17:05:50,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 218 transitions, 2835 flow [2024-06-20 17:05:50,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 218 transitions, 2751 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-20 17:05:50,984 INFO L231 Difference]: Finished difference. Result has 181 places, 201 transitions, 2263 flow [2024-06-20 17:05:50,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2145, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2263, PETRI_PLACES=181, PETRI_TRANSITIONS=201} [2024-06-20 17:05:50,984 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 138 predicate places. [2024-06-20 17:05:50,985 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 201 transitions, 2263 flow [2024-06-20 17:05:50,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:05:50,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:05:50,985 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:05:50,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-20 17:05:50,985 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)] === [2024-06-20 17:05:50,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:05:50,986 INFO L85 PathProgramCache]: Analyzing trace with hash 970528679, now seen corresponding path program 2 times [2024-06-20 17:05:50,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:05:50,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436368515] [2024-06-20 17:05:50,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:05:50,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:05:50,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:05:52,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:05:52,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:05:52,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436368515] [2024-06-20 17:05:52,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436368515] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:05:52,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:05:52,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:05:52,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278251897] [2024-06-20 17:05:52,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:05:52,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:05:52,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:05:52,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:05:52,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:05:52,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:05:52,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 201 transitions, 2263 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:05:52,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:05:52,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:05:52,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:05:53,927 INFO L124 PetriNetUnfolderBase]: 2033/3368 cut-off events. [2024-06-20 17:05:53,927 INFO L125 PetriNetUnfolderBase]: For 132628/132630 co-relation queries the response was YES. [2024-06-20 17:05:53,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20609 conditions, 3368 events. 2033/3368 cut-off events. For 132628/132630 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 19602 event pairs, 487 based on Foata normal form. 1/3368 useless extension candidates. Maximal degree in co-relation 20522. Up to 3150 conditions per place. [2024-06-20 17:05:53,952 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 186 selfloop transitions, 27 changer transitions 0/218 dead transitions. [2024-06-20 17:05:53,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 218 transitions, 2825 flow [2024-06-20 17:05:53,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:05:53,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:05:53,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-20 17:05:53,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.391156462585034 [2024-06-20 17:05:53,953 INFO L175 Difference]: Start difference. First operand has 181 places, 201 transitions, 2263 flow. Second operand 7 states and 115 transitions. [2024-06-20 17:05:53,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 218 transitions, 2825 flow [2024-06-20 17:05:54,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 218 transitions, 2729 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-20 17:05:54,116 INFO L231 Difference]: Finished difference. Result has 183 places, 201 transitions, 2227 flow [2024-06-20 17:05:54,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2167, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2227, PETRI_PLACES=183, PETRI_TRANSITIONS=201} [2024-06-20 17:05:54,116 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 140 predicate places. [2024-06-20 17:05:54,116 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 201 transitions, 2227 flow [2024-06-20 17:05:54,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:05:54,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:05:54,118 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:05:54,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-20 17:05:54,119 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)] === [2024-06-20 17:05:54,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:05:54,119 INFO L85 PathProgramCache]: Analyzing trace with hash 163604913, now seen corresponding path program 3 times [2024-06-20 17:05:54,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:05:54,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758977945] [2024-06-20 17:05:54,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:05:54,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:05:54,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:05:55,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:05:55,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:05:55,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758977945] [2024-06-20 17:05:55,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758977945] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:05:55,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:05:55,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:05:55,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27498373] [2024-06-20 17:05:55,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:05:55,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:05:55,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:05:55,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:05:55,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:05:55,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:05:55,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 201 transitions, 2227 flow. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:05:55,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:05:55,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:05:55,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:05:56,440 INFO L124 PetriNetUnfolderBase]: 2030/3368 cut-off events. [2024-06-20 17:05:56,440 INFO L125 PetriNetUnfolderBase]: For 136562/136564 co-relation queries the response was YES. [2024-06-20 17:05:56,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20619 conditions, 3368 events. 2030/3368 cut-off events. For 136562/136564 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 19623 event pairs, 480 based on Foata normal form. 1/3369 useless extension candidates. Maximal degree in co-relation 20531. Up to 3156 conditions per place. [2024-06-20 17:05:56,465 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 196 selfloop transitions, 19 changer transitions 0/220 dead transitions. [2024-06-20 17:05:56,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 220 transitions, 2711 flow [2024-06-20 17:05:56,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:05:56,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:05:56,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-20 17:05:56,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-20 17:05:56,467 INFO L175 Difference]: Start difference. First operand has 183 places, 201 transitions, 2227 flow. Second operand 6 states and 106 transitions. [2024-06-20 17:05:56,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 220 transitions, 2711 flow [2024-06-20 17:05:56,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 220 transitions, 2607 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-20 17:05:56,625 INFO L231 Difference]: Finished difference. Result has 182 places, 201 transitions, 2171 flow [2024-06-20 17:05:56,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2123, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2171, PETRI_PLACES=182, PETRI_TRANSITIONS=201} [2024-06-20 17:05:56,625 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 139 predicate places. [2024-06-20 17:05:56,626 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 201 transitions, 2171 flow [2024-06-20 17:05:56,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:05:56,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:05:56,626 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:05:56,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-20 17:05:56,626 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)] === [2024-06-20 17:05:56,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:05:56,627 INFO L85 PathProgramCache]: Analyzing trace with hash 126305589, now seen corresponding path program 2 times [2024-06-20 17:05:56,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:05:56,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424956219] [2024-06-20 17:05:56,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:05:56,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:05:56,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:05:58,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:05:58,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:05:58,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424956219] [2024-06-20 17:05:58,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424956219] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:05:58,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:05:58,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:05:58,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407643148] [2024-06-20 17:05:58,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:05:58,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:05:58,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:05:58,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:05:58,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:05:58,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:05:58,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 201 transitions, 2171 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:05:58,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:05:58,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:05:58,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:05:59,259 INFO L124 PetriNetUnfolderBase]: 2043/3388 cut-off events. [2024-06-20 17:05:59,259 INFO L125 PetriNetUnfolderBase]: For 142698/142700 co-relation queries the response was YES. [2024-06-20 17:05:59,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20853 conditions, 3388 events. 2043/3388 cut-off events. For 142698/142700 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 19813 event pairs, 481 based on Foata normal form. 1/3389 useless extension candidates. Maximal degree in co-relation 20765. Up to 3155 conditions per place. [2024-06-20 17:05:59,285 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 194 selfloop transitions, 26 changer transitions 0/225 dead transitions. [2024-06-20 17:05:59,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 225 transitions, 2865 flow [2024-06-20 17:05:59,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:05:59,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:05:59,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-20 17:05:59,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3979591836734694 [2024-06-20 17:05:59,287 INFO L175 Difference]: Start difference. First operand has 182 places, 201 transitions, 2171 flow. Second operand 7 states and 117 transitions. [2024-06-20 17:05:59,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 225 transitions, 2865 flow [2024-06-20 17:05:59,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 225 transitions, 2819 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-20 17:05:59,508 INFO L231 Difference]: Finished difference. Result has 184 places, 207 transitions, 2291 flow [2024-06-20 17:05:59,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2127, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2291, PETRI_PLACES=184, PETRI_TRANSITIONS=207} [2024-06-20 17:05:59,508 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 141 predicate places. [2024-06-20 17:05:59,508 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 207 transitions, 2291 flow [2024-06-20 17:05:59,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:05:59,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:05:59,509 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:05:59,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-20 17:05:59,509 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)] === [2024-06-20 17:05:59,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:05:59,510 INFO L85 PathProgramCache]: Analyzing trace with hash 126068439, now seen corresponding path program 3 times [2024-06-20 17:05:59,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:05:59,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925121654] [2024-06-20 17:05:59,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:05:59,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:05:59,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:06:01,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:06:01,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:06:01,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925121654] [2024-06-20 17:06:01,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925121654] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:06:01,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:06:01,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:06:01,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972250389] [2024-06-20 17:06:01,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:06:01,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:06:01,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:06:01,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:06:01,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:06:01,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:06:01,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 207 transitions, 2291 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:06:01,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:06:01,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:06:01,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:06:01,910 INFO L124 PetriNetUnfolderBase]: 2040/3384 cut-off events. [2024-06-20 17:06:01,910 INFO L125 PetriNetUnfolderBase]: For 143572/143574 co-relation queries the response was YES. [2024-06-20 17:06:01,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21171 conditions, 3384 events. 2040/3384 cut-off events. For 143572/143574 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 19737 event pairs, 480 based on Foata normal form. 1/3385 useless extension candidates. Maximal degree in co-relation 21082. Up to 3167 conditions per place. [2024-06-20 17:06:01,945 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 203 selfloop transitions, 22 changer transitions 0/230 dead transitions. [2024-06-20 17:06:01,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 230 transitions, 2857 flow [2024-06-20 17:06:01,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:06:01,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:06:01,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-20 17:06:01,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4013605442176871 [2024-06-20 17:06:01,947 INFO L175 Difference]: Start difference. First operand has 184 places, 207 transitions, 2291 flow. Second operand 7 states and 118 transitions. [2024-06-20 17:06:01,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 230 transitions, 2857 flow [2024-06-20 17:06:02,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 230 transitions, 2779 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-06-20 17:06:02,136 INFO L231 Difference]: Finished difference. Result has 188 places, 210 transitions, 2329 flow [2024-06-20 17:06:02,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2215, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2329, PETRI_PLACES=188, PETRI_TRANSITIONS=210} [2024-06-20 17:06:02,137 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 145 predicate places. [2024-06-20 17:06:02,137 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 210 transitions, 2329 flow [2024-06-20 17:06:02,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:06:02,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:06:02,138 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:06:02,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-20 17:06:02,138 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)] === [2024-06-20 17:06:02,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:06:02,138 INFO L85 PathProgramCache]: Analyzing trace with hash 126314517, now seen corresponding path program 1 times [2024-06-20 17:06:02,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:06:02,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963751138] [2024-06-20 17:06:02,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:06:02,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:06:02,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:06:04,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:06:04,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:06:04,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963751138] [2024-06-20 17:06:04,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963751138] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:06:04,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:06:04,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:06:04,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943765413] [2024-06-20 17:06:04,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:06:04,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:06:04,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:06:04,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:06:04,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:06:04,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 17:06:04,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 210 transitions, 2329 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:06:04,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:06:04,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 17:06:04,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:06:05,141 INFO L124 PetriNetUnfolderBase]: 1903/3200 cut-off events. [2024-06-20 17:06:05,142 INFO L125 PetriNetUnfolderBase]: For 149209/149220 co-relation queries the response was YES. [2024-06-20 17:06:05,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20464 conditions, 3200 events. 1903/3200 cut-off events. For 149209/149220 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 19002 event pairs, 455 based on Foata normal form. 11/3185 useless extension candidates. Maximal degree in co-relation 20373. Up to 2932 conditions per place. [2024-06-20 17:06:05,165 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 193 selfloop transitions, 15 changer transitions 0/225 dead transitions. [2024-06-20 17:06:05,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 225 transitions, 2813 flow [2024-06-20 17:06:05,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:06:05,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:06:05,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-20 17:06:05,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3877551020408163 [2024-06-20 17:06:05,166 INFO L175 Difference]: Start difference. First operand has 188 places, 210 transitions, 2329 flow. Second operand 7 states and 114 transitions. [2024-06-20 17:06:05,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 225 transitions, 2813 flow [2024-06-20 17:06:05,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 225 transitions, 2727 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-20 17:06:05,370 INFO L231 Difference]: Finished difference. Result has 190 places, 212 transitions, 2316 flow [2024-06-20 17:06:05,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2243, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2316, PETRI_PLACES=190, PETRI_TRANSITIONS=212} [2024-06-20 17:06:05,371 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 147 predicate places. [2024-06-20 17:06:05,371 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 212 transitions, 2316 flow [2024-06-20 17:06:05,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:06:05,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:06:05,371 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:06:05,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-20 17:06:05,371 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)] === [2024-06-20 17:06:05,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:06:05,372 INFO L85 PathProgramCache]: Analyzing trace with hash -30730749, now seen corresponding path program 1 times [2024-06-20 17:06:05,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:06:05,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168107942] [2024-06-20 17:06:05,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:06:05,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:06:05,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:06:07,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:06:07,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:06:07,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168107942] [2024-06-20 17:06:07,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168107942] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:06:07,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:06:07,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:06:07,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247637561] [2024-06-20 17:06:07,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:06:07,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:06:07,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:06:07,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:06:07,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:06:07,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:06:07,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 212 transitions, 2316 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:06:07,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:06:07,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:06:07,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:06:08,883 INFO L124 PetriNetUnfolderBase]: 2048/3397 cut-off events. [2024-06-20 17:06:08,884 INFO L125 PetriNetUnfolderBase]: For 154852/154858 co-relation queries the response was YES. [2024-06-20 17:06:08,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21585 conditions, 3397 events. 2048/3397 cut-off events. For 154852/154858 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 19876 event pairs, 475 based on Foata normal form. 7/3403 useless extension candidates. Maximal degree in co-relation 21493. Up to 3042 conditions per place. [2024-06-20 17:06:08,909 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 194 selfloop transitions, 50 changer transitions 0/249 dead transitions. [2024-06-20 17:06:08,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 249 transitions, 3260 flow [2024-06-20 17:06:08,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:06:08,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:06:08,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-20 17:06:08,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43537414965986393 [2024-06-20 17:06:08,911 INFO L175 Difference]: Start difference. First operand has 190 places, 212 transitions, 2316 flow. Second operand 7 states and 128 transitions. [2024-06-20 17:06:08,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 249 transitions, 3260 flow [2024-06-20 17:06:09,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 249 transitions, 3201 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-20 17:06:09,111 INFO L231 Difference]: Finished difference. Result has 194 places, 221 transitions, 2566 flow [2024-06-20 17:06:09,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2257, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2566, PETRI_PLACES=194, PETRI_TRANSITIONS=221} [2024-06-20 17:06:09,111 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 151 predicate places. [2024-06-20 17:06:09,111 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 221 transitions, 2566 flow [2024-06-20 17:06:09,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:06:09,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:06:09,112 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:06:09,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-20 17:06:09,112 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)] === [2024-06-20 17:06:09,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:06:09,112 INFO L85 PathProgramCache]: Analyzing trace with hash -30581019, now seen corresponding path program 2 times [2024-06-20 17:06:09,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:06:09,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544200431] [2024-06-20 17:06:09,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:06:09,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:06:09,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:06:11,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:06:11,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:06:11,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544200431] [2024-06-20 17:06:11,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544200431] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:06:11,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:06:11,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:06:11,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553776047] [2024-06-20 17:06:11,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:06:11,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:06:11,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:06:11,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:06:11,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:06:11,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:06:11,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 221 transitions, 2566 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:06:11,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:06:11,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:06:11,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:06:12,334 INFO L124 PetriNetUnfolderBase]: 2071/3433 cut-off events. [2024-06-20 17:06:12,335 INFO L125 PetriNetUnfolderBase]: For 164638/164640 co-relation queries the response was YES. [2024-06-20 17:06:12,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22648 conditions, 3433 events. 2071/3433 cut-off events. For 164638/164640 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 20076 event pairs, 465 based on Foata normal form. 1/3434 useless extension candidates. Maximal degree in co-relation 22553. Up to 3126 conditions per place. [2024-06-20 17:06:12,361 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 197 selfloop transitions, 53 changer transitions 0/255 dead transitions. [2024-06-20 17:06:12,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 255 transitions, 3419 flow [2024-06-20 17:06:12,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:06:12,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:06:12,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-20 17:06:12,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-20 17:06:12,363 INFO L175 Difference]: Start difference. First operand has 194 places, 221 transitions, 2566 flow. Second operand 8 states and 134 transitions. [2024-06-20 17:06:12,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 255 transitions, 3419 flow [2024-06-20 17:06:12,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 255 transitions, 3311 flow, removed 43 selfloop flow, removed 2 redundant places. [2024-06-20 17:06:12,655 INFO L231 Difference]: Finished difference. Result has 201 places, 233 transitions, 2801 flow [2024-06-20 17:06:12,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2474, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2801, PETRI_PLACES=201, PETRI_TRANSITIONS=233} [2024-06-20 17:06:12,655 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 158 predicate places. [2024-06-20 17:06:12,655 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 233 transitions, 2801 flow [2024-06-20 17:06:12,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:06:12,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:06:12,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:06:12,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-20 17:06:12,656 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)] === [2024-06-20 17:06:12,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:06:12,656 INFO L85 PathProgramCache]: Analyzing trace with hash -25008893, now seen corresponding path program 1 times [2024-06-20 17:06:12,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:06:12,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472847825] [2024-06-20 17:06:12,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:06:12,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:06:12,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:06:15,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:06:15,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:06:15,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472847825] [2024-06-20 17:06:15,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472847825] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:06:15,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:06:15,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:06:15,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91369989] [2024-06-20 17:06:15,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:06:15,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:06:15,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:06:15,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:06:15,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:06:15,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 17:06:15,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 233 transitions, 2801 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:06:15,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:06:15,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 17:06:15,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:06:16,379 INFO L124 PetriNetUnfolderBase]: 1961/3280 cut-off events. [2024-06-20 17:06:16,380 INFO L125 PetriNetUnfolderBase]: For 170725/170736 co-relation queries the response was YES. [2024-06-20 17:06:16,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22041 conditions, 3280 events. 1961/3280 cut-off events. For 170725/170736 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 19397 event pairs, 439 based on Foata normal form. 11/3265 useless extension candidates. Maximal degree in co-relation 21943. Up to 2925 conditions per place. [2024-06-20 17:06:16,409 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 193 selfloop transitions, 41 changer transitions 0/256 dead transitions. [2024-06-20 17:06:16,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 256 transitions, 3359 flow [2024-06-20 17:06:16,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:06:16,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:06:16,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-20 17:06:16,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-20 17:06:16,413 INFO L175 Difference]: Start difference. First operand has 201 places, 233 transitions, 2801 flow. Second operand 8 states and 136 transitions. [2024-06-20 17:06:16,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 256 transitions, 3359 flow [2024-06-20 17:06:16,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 256 transitions, 3215 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-20 17:06:16,666 INFO L231 Difference]: Finished difference. Result has 204 places, 236 transitions, 2787 flow [2024-06-20 17:06:16,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2657, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2787, PETRI_PLACES=204, PETRI_TRANSITIONS=236} [2024-06-20 17:06:16,667 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 161 predicate places. [2024-06-20 17:06:16,667 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 236 transitions, 2787 flow [2024-06-20 17:06:16,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:06:16,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:06:16,668 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:06:16,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-20 17:06:16,668 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)] === [2024-06-20 17:06:16,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:06:16,668 INFO L85 PathProgramCache]: Analyzing trace with hash 358353115, now seen corresponding path program 3 times [2024-06-20 17:06:16,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:06:16,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027720966] [2024-06-20 17:06:16,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:06:16,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:06:16,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:06:18,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:06:18,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:06:18,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027720966] [2024-06-20 17:06:18,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027720966] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:06:18,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:06:18,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:06:18,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497169985] [2024-06-20 17:06:18,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:06:18,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:06:18,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:06:18,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:06:18,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:06:18,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:06:18,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 236 transitions, 2787 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:06:18,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:06:18,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:06:18,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:06:19,951 INFO L124 PetriNetUnfolderBase]: 2086/3447 cut-off events. [2024-06-20 17:06:19,952 INFO L125 PetriNetUnfolderBase]: For 177021/177033 co-relation queries the response was YES. [2024-06-20 17:06:19,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23169 conditions, 3447 events. 2086/3447 cut-off events. For 177021/177033 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 20133 event pairs, 487 based on Foata normal form. 13/3458 useless extension candidates. Maximal degree in co-relation 23070. Up to 3087 conditions per place. [2024-06-20 17:06:19,981 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 200 selfloop transitions, 62 changer transitions 0/267 dead transitions. [2024-06-20 17:06:19,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 267 transitions, 3837 flow [2024-06-20 17:06:19,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:06:19,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:06:19,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-20 17:06:19,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217687074829932 [2024-06-20 17:06:19,983 INFO L175 Difference]: Start difference. First operand has 204 places, 236 transitions, 2787 flow. Second operand 7 states and 124 transitions. [2024-06-20 17:06:19,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 267 transitions, 3837 flow [2024-06-20 17:06:20,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 267 transitions, 3729 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-20 17:06:20,240 INFO L231 Difference]: Finished difference. Result has 205 places, 242 transitions, 2951 flow [2024-06-20 17:06:20,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2679, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2951, PETRI_PLACES=205, PETRI_TRANSITIONS=242} [2024-06-20 17:06:20,241 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 162 predicate places. [2024-06-20 17:06:20,241 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 242 transitions, 2951 flow [2024-06-20 17:06:20,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:06:20,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:06:20,241 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:06:20,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-20 17:06:20,241 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)] === [2024-06-20 17:06:20,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:06:20,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1165707365, now seen corresponding path program 4 times [2024-06-20 17:06:20,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:06:20,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705347493] [2024-06-20 17:06:20,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:06:20,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:06:20,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:06:22,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:06:22,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:06:22,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705347493] [2024-06-20 17:06:22,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705347493] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:06:22,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:06:22,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:06:22,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127170573] [2024-06-20 17:06:22,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:06:22,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:06:22,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:06:22,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:06:22,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:06:22,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:06:22,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 242 transitions, 2951 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:06:22,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:06:22,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:06:22,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:06:23,246 INFO L124 PetriNetUnfolderBase]: 2091/3458 cut-off events. [2024-06-20 17:06:23,247 INFO L125 PetriNetUnfolderBase]: For 184055/184067 co-relation queries the response was YES. [2024-06-20 17:06:23,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23462 conditions, 3458 events. 2091/3458 cut-off events. For 184055/184067 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 20215 event pairs, 488 based on Foata normal form. 13/3469 useless extension candidates. Maximal degree in co-relation 23362. Up to 3091 conditions per place. [2024-06-20 17:06:23,277 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 195 selfloop transitions, 65 changer transitions 0/265 dead transitions. [2024-06-20 17:06:23,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 265 transitions, 3819 flow [2024-06-20 17:06:23,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:06:23,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:06:23,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-20 17:06:23,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-20 17:06:23,279 INFO L175 Difference]: Start difference. First operand has 205 places, 242 transitions, 2951 flow. Second operand 7 states and 119 transitions. [2024-06-20 17:06:23,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 265 transitions, 3819 flow [2024-06-20 17:06:23,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 265 transitions, 3685 flow, removed 46 selfloop flow, removed 3 redundant places. [2024-06-20 17:06:23,544 INFO L231 Difference]: Finished difference. Result has 209 places, 245 transitions, 3029 flow [2024-06-20 17:06:23,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2833, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3029, PETRI_PLACES=209, PETRI_TRANSITIONS=245} [2024-06-20 17:06:23,545 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 166 predicate places. [2024-06-20 17:06:23,545 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 245 transitions, 3029 flow [2024-06-20 17:06:23,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:06:23,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:06:23,545 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:06:23,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-20 17:06:23,545 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)] === [2024-06-20 17:06:23,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:06:23,546 INFO L85 PathProgramCache]: Analyzing trace with hash 147551835, now seen corresponding path program 5 times [2024-06-20 17:06:23,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:06:23,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597189119] [2024-06-20 17:06:23,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:06:23,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:06:23,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:06:25,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:06:25,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:06:25,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597189119] [2024-06-20 17:06:25,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597189119] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:06:25,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:06:25,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:06:25,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904394546] [2024-06-20 17:06:25,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:06:25,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:06:25,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:06:25,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:06:25,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:06:25,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:06:25,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 245 transitions, 3029 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:06:25,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:06:25,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:06:25,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:06:26,828 INFO L124 PetriNetUnfolderBase]: 2096/3468 cut-off events. [2024-06-20 17:06:26,829 INFO L125 PetriNetUnfolderBase]: For 188698/188704 co-relation queries the response was YES. [2024-06-20 17:06:26,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23643 conditions, 3468 events. 2096/3468 cut-off events. For 188698/188704 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 20254 event pairs, 485 based on Foata normal form. 2/3469 useless extension candidates. Maximal degree in co-relation 23541. Up to 3005 conditions per place. [2024-06-20 17:06:26,859 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 171 selfloop transitions, 98 changer transitions 0/274 dead transitions. [2024-06-20 17:06:26,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 274 transitions, 3914 flow [2024-06-20 17:06:26,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:06:26,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:06:26,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-20 17:06:26,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445578231292517 [2024-06-20 17:06:26,860 INFO L175 Difference]: Start difference. First operand has 209 places, 245 transitions, 3029 flow. Second operand 7 states and 131 transitions. [2024-06-20 17:06:26,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 274 transitions, 3914 flow [2024-06-20 17:06:27,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 274 transitions, 3724 flow, removed 42 selfloop flow, removed 4 redundant places. [2024-06-20 17:06:27,151 INFO L231 Difference]: Finished difference. Result has 213 places, 248 transitions, 3153 flow [2024-06-20 17:06:27,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2847, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3153, PETRI_PLACES=213, PETRI_TRANSITIONS=248} [2024-06-20 17:06:27,152 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 170 predicate places. [2024-06-20 17:06:27,152 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 248 transitions, 3153 flow [2024-06-20 17:06:27,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:06:27,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:06:27,152 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:06:27,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-20 17:06:27,152 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)] === [2024-06-20 17:06:27,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:06:27,153 INFO L85 PathProgramCache]: Analyzing trace with hash -392571739, now seen corresponding path program 6 times [2024-06-20 17:06:27,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:06:27,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658152674] [2024-06-20 17:06:27,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:06:27,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:06:27,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:06:29,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:06:29,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:06:29,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658152674] [2024-06-20 17:06:29,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658152674] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:06:29,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:06:29,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:06:29,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789490263] [2024-06-20 17:06:29,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:06:29,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:06:29,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:06:29,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:06:29,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:06:29,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:06:29,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 248 transitions, 3153 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:06:29,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:06:29,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:06:29,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:06:31,111 INFO L124 PetriNetUnfolderBase]: 2093/3466 cut-off events. [2024-06-20 17:06:31,112 INFO L125 PetriNetUnfolderBase]: For 192873/192875 co-relation queries the response was YES. [2024-06-20 17:06:31,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23852 conditions, 3466 events. 2093/3466 cut-off events. For 192873/192875 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 20247 event pairs, 467 based on Foata normal form. 1/3467 useless extension candidates. Maximal degree in co-relation 23748. Up to 3003 conditions per place. [2024-06-20 17:06:31,138 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 178 selfloop transitions, 98 changer transitions 0/281 dead transitions. [2024-06-20 17:06:31,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 281 transitions, 3907 flow [2024-06-20 17:06:31,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:06:31,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:06:31,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-20 17:06:31,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-20 17:06:31,140 INFO L175 Difference]: Start difference. First operand has 213 places, 248 transitions, 3153 flow. Second operand 8 states and 150 transitions. [2024-06-20 17:06:31,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 281 transitions, 3907 flow [2024-06-20 17:06:31,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 281 transitions, 3678 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-20 17:06:31,414 INFO L231 Difference]: Finished difference. Result has 215 places, 248 transitions, 3158 flow [2024-06-20 17:06:31,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2924, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3158, PETRI_PLACES=215, PETRI_TRANSITIONS=248} [2024-06-20 17:06:31,418 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 172 predicate places. [2024-06-20 17:06:31,419 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 248 transitions, 3158 flow [2024-06-20 17:06:31,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:06:31,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:06:31,419 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:06:31,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-20 17:06:31,419 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)] === [2024-06-20 17:06:31,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:06:31,421 INFO L85 PathProgramCache]: Analyzing trace with hash -379663773, now seen corresponding path program 2 times [2024-06-20 17:06:31,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:06:31,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338708510] [2024-06-20 17:06:31,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:06:31,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:06:31,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:06:33,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:06:33,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:06:33,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338708510] [2024-06-20 17:06:33,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338708510] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:06:33,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:06:33,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:06:33,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271457316] [2024-06-20 17:06:33,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:06:33,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:06:33,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:06:33,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:06:33,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:06:33,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 17:06:33,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 248 transitions, 3158 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:06:33,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:06:33,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 17:06:33,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:06:34,908 INFO L124 PetriNetUnfolderBase]: 1985/3310 cut-off events. [2024-06-20 17:06:34,908 INFO L125 PetriNetUnfolderBase]: For 204694/204716 co-relation queries the response was YES. [2024-06-20 17:06:34,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23458 conditions, 3310 events. 1985/3310 cut-off events. For 204694/204716 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 19588 event pairs, 453 based on Foata normal form. 15/3293 useless extension candidates. Maximal degree in co-relation 23353. Up to 2933 conditions per place. [2024-06-20 17:06:34,935 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 189 selfloop transitions, 52 changer transitions 0/267 dead transitions. [2024-06-20 17:06:34,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 267 transitions, 3870 flow [2024-06-20 17:06:34,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:06:34,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:06:34,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-20 17:06:34,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4013605442176871 [2024-06-20 17:06:34,937 INFO L175 Difference]: Start difference. First operand has 215 places, 248 transitions, 3158 flow. Second operand 7 states and 118 transitions. [2024-06-20 17:06:34,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 267 transitions, 3870 flow [2024-06-20 17:06:35,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 267 transitions, 3713 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-20 17:06:35,250 INFO L231 Difference]: Finished difference. Result has 216 places, 254 transitions, 3203 flow [2024-06-20 17:06:35,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3003, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3203, PETRI_PLACES=216, PETRI_TRANSITIONS=254} [2024-06-20 17:06:35,251 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 173 predicate places. [2024-06-20 17:06:35,251 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 254 transitions, 3203 flow [2024-06-20 17:06:35,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:06:35,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:06:35,252 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:06:35,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-20 17:06:35,252 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)] === [2024-06-20 17:06:35,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:06:35,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1198443543, now seen corresponding path program 3 times [2024-06-20 17:06:35,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:06:35,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897070921] [2024-06-20 17:06:35,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:06:35,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:06:35,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:06:37,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:06:37,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:06:37,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897070921] [2024-06-20 17:06:37,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897070921] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:06:37,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:06:37,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:06:37,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125170588] [2024-06-20 17:06:37,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:06:37,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:06:37,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:06:37,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:06:37,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:06:37,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 17:06:37,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 254 transitions, 3203 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:06:37,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:06:37,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 17:06:37,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:06:38,637 INFO L124 PetriNetUnfolderBase]: 1980/3315 cut-off events. [2024-06-20 17:06:38,637 INFO L125 PetriNetUnfolderBase]: For 202549/202568 co-relation queries the response was YES. [2024-06-20 17:06:38,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23538 conditions, 3315 events. 1980/3315 cut-off events. For 202549/202568 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 19686 event pairs, 443 based on Foata normal form. 11/3299 useless extension candidates. Maximal degree in co-relation 23432. Up to 2937 conditions per place. [2024-06-20 17:06:38,666 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 202 selfloop transitions, 45 changer transitions 0/273 dead transitions. [2024-06-20 17:06:38,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 273 transitions, 3749 flow [2024-06-20 17:06:38,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:06:38,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:06:38,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-20 17:06:38,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41836734693877553 [2024-06-20 17:06:38,668 INFO L175 Difference]: Start difference. First operand has 216 places, 254 transitions, 3203 flow. Second operand 7 states and 123 transitions. [2024-06-20 17:06:38,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 273 transitions, 3749 flow [2024-06-20 17:06:38,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 273 transitions, 3638 flow, removed 31 selfloop flow, removed 3 redundant places. [2024-06-20 17:06:38,993 INFO L231 Difference]: Finished difference. Result has 220 places, 254 transitions, 3192 flow [2024-06-20 17:06:38,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3092, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3192, PETRI_PLACES=220, PETRI_TRANSITIONS=254} [2024-06-20 17:06:38,995 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 177 predicate places. [2024-06-20 17:06:38,995 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 254 transitions, 3192 flow [2024-06-20 17:06:38,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:06:38,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:06:38,996 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:06:38,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-20 17:06:38,996 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)] === [2024-06-20 17:06:38,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:06:38,996 INFO L85 PathProgramCache]: Analyzing trace with hash -379676793, now seen corresponding path program 4 times [2024-06-20 17:06:38,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:06:38,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60128539] [2024-06-20 17:06:38,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:06:38,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:06:39,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:06:41,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:06:41,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:06:41,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60128539] [2024-06-20 17:06:41,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60128539] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:06:41,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:06:41,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:06:41,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281664358] [2024-06-20 17:06:41,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:06:41,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:06:41,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:06:41,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:06:41,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:06:41,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 17:06:41,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 254 transitions, 3192 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:06:41,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:06:41,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 17:06:41,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:06:42,826 INFO L124 PetriNetUnfolderBase]: 1975/3295 cut-off events. [2024-06-20 17:06:42,826 INFO L125 PetriNetUnfolderBase]: For 205988/206010 co-relation queries the response was YES. [2024-06-20 17:06:42,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23507 conditions, 3295 events. 1975/3295 cut-off events. For 205988/206010 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 19455 event pairs, 452 based on Foata normal form. 18/3282 useless extension candidates. Maximal degree in co-relation 23399. Up to 2935 conditions per place. [2024-06-20 17:06:42,854 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 197 selfloop transitions, 46 changer transitions 0/269 dead transitions. [2024-06-20 17:06:42,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 269 transitions, 3758 flow [2024-06-20 17:06:42,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:06:42,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:06:42,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-20 17:06:42,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-20 17:06:42,856 INFO L175 Difference]: Start difference. First operand has 220 places, 254 transitions, 3192 flow. Second operand 7 states and 116 transitions. [2024-06-20 17:06:42,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 269 transitions, 3758 flow [2024-06-20 17:06:43,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 269 transitions, 3660 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-20 17:06:43,093 INFO L231 Difference]: Finished difference. Result has 221 places, 257 transitions, 3246 flow [2024-06-20 17:06:43,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3094, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3246, PETRI_PLACES=221, PETRI_TRANSITIONS=257} [2024-06-20 17:06:43,094 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 178 predicate places. [2024-06-20 17:06:43,094 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 257 transitions, 3246 flow [2024-06-20 17:06:43,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:06:43,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:06:43,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:06:43,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-20 17:06:43,094 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)] === [2024-06-20 17:06:43,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:06:43,095 INFO L85 PathProgramCache]: Analyzing trace with hash 366069976, now seen corresponding path program 1 times [2024-06-20 17:06:43,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:06:43,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472604347] [2024-06-20 17:06:43,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:06:43,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:06:43,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:06:44,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:06:44,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:06:44,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472604347] [2024-06-20 17:06:44,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472604347] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:06:44,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:06:44,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:06:44,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236606756] [2024-06-20 17:06:44,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:06:44,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:06:44,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:06:44,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:06:44,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:06:44,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:06:44,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 257 transitions, 3246 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:06:44,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:06:44,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:06:44,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:06:45,751 INFO L124 PetriNetUnfolderBase]: 2112/3496 cut-off events. [2024-06-20 17:06:45,752 INFO L125 PetriNetUnfolderBase]: For 211829/211835 co-relation queries the response was YES. [2024-06-20 17:06:45,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24820 conditions, 3496 events. 2112/3496 cut-off events. For 211829/211835 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 20530 event pairs, 484 based on Foata normal form. 5/3501 useless extension candidates. Maximal degree in co-relation 24711. Up to 3259 conditions per place. [2024-06-20 17:06:45,784 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 243 selfloop transitions, 28 changer transitions 0/276 dead transitions. [2024-06-20 17:06:45,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 276 transitions, 3876 flow [2024-06-20 17:06:45,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:06:45,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:06:45,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-20 17:06:45,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3877551020408163 [2024-06-20 17:06:45,786 INFO L175 Difference]: Start difference. First operand has 221 places, 257 transitions, 3246 flow. Second operand 7 states and 114 transitions. [2024-06-20 17:06:45,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 276 transitions, 3876 flow [2024-06-20 17:06:46,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 276 transitions, 3746 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-20 17:06:46,266 INFO L231 Difference]: Finished difference. Result has 223 places, 260 transitions, 3228 flow [2024-06-20 17:06:46,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3116, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3228, PETRI_PLACES=223, PETRI_TRANSITIONS=260} [2024-06-20 17:06:46,267 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 180 predicate places. [2024-06-20 17:06:46,267 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 260 transitions, 3228 flow [2024-06-20 17:06:46,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:06:46,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:06:46,267 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:06:46,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-20 17:06:46,267 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)] === [2024-06-20 17:06:46,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:06:46,268 INFO L85 PathProgramCache]: Analyzing trace with hash -662345298, now seen corresponding path program 2 times [2024-06-20 17:06:46,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:06:46,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406411931] [2024-06-20 17:06:46,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:06:46,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:06:46,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:06:47,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:06:47,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:06:47,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406411931] [2024-06-20 17:06:47,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406411931] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:06:47,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:06:47,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:06:47,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066539493] [2024-06-20 17:06:47,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:06:47,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:06:47,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:06:47,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:06:47,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:06:47,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:06:47,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 260 transitions, 3228 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:06:47,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:06:47,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:06:47,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:06:49,179 INFO L124 PetriNetUnfolderBase]: 2117/3498 cut-off events. [2024-06-20 17:06:49,179 INFO L125 PetriNetUnfolderBase]: For 217683/217685 co-relation queries the response was YES. [2024-06-20 17:06:49,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25142 conditions, 3498 events. 2117/3498 cut-off events. For 217683/217685 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 20479 event pairs, 484 based on Foata normal form. 1/3498 useless extension candidates. Maximal degree in co-relation 25032. Up to 3259 conditions per place. [2024-06-20 17:06:49,210 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 244 selfloop transitions, 36 changer transitions 0/285 dead transitions. [2024-06-20 17:06:49,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 285 transitions, 4056 flow [2024-06-20 17:06:49,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:06:49,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:06:49,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-20 17:06:49,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37037037037037035 [2024-06-20 17:06:49,212 INFO L175 Difference]: Start difference. First operand has 223 places, 260 transitions, 3228 flow. Second operand 9 states and 140 transitions. [2024-06-20 17:06:49,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 285 transitions, 4056 flow [2024-06-20 17:06:49,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 285 transitions, 3966 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-20 17:06:49,649 INFO L231 Difference]: Finished difference. Result has 227 places, 266 transitions, 3322 flow [2024-06-20 17:06:49,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3138, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3322, PETRI_PLACES=227, PETRI_TRANSITIONS=266} [2024-06-20 17:06:49,651 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 184 predicate places. [2024-06-20 17:06:49,651 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 266 transitions, 3322 flow [2024-06-20 17:06:49,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:06:49,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:06:49,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:06:49,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-20 17:06:49,651 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)] === [2024-06-20 17:06:49,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:06:49,652 INFO L85 PathProgramCache]: Analyzing trace with hash 369789046, now seen corresponding path program 3 times [2024-06-20 17:06:49,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:06:49,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858066441] [2024-06-20 17:06:49,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:06:49,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:06:49,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:06:51,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:06:51,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:06:51,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858066441] [2024-06-20 17:06:51,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858066441] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:06:51,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:06:51,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:06:51,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970970586] [2024-06-20 17:06:51,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:06:51,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:06:51,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:06:51,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:06:51,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:06:51,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:06:51,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 266 transitions, 3322 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:06:51,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:06:51,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:06:51,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:06:53,024 INFO L124 PetriNetUnfolderBase]: 2114/3494 cut-off events. [2024-06-20 17:06:53,024 INFO L125 PetriNetUnfolderBase]: For 224269/224271 co-relation queries the response was YES. [2024-06-20 17:06:53,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25434 conditions, 3494 events. 2114/3494 cut-off events. For 224269/224271 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 20445 event pairs, 484 based on Foata normal form. 1/3494 useless extension candidates. Maximal degree in co-relation 25323. Up to 3262 conditions per place. [2024-06-20 17:06:53,054 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 248 selfloop transitions, 30 changer transitions 0/283 dead transitions. [2024-06-20 17:06:53,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 283 transitions, 3924 flow [2024-06-20 17:06:53,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:06:53,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:06:53,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-20 17:06:53,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-20 17:06:53,056 INFO L175 Difference]: Start difference. First operand has 227 places, 266 transitions, 3322 flow. Second operand 8 states and 126 transitions. [2024-06-20 17:06:53,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 283 transitions, 3924 flow [2024-06-20 17:06:53,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 283 transitions, 3784 flow, removed 43 selfloop flow, removed 6 redundant places. [2024-06-20 17:06:53,431 INFO L231 Difference]: Finished difference. Result has 229 places, 266 transitions, 3248 flow [2024-06-20 17:06:53,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3182, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3248, PETRI_PLACES=229, PETRI_TRANSITIONS=266} [2024-06-20 17:06:53,432 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 186 predicate places. [2024-06-20 17:06:53,432 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 266 transitions, 3248 flow [2024-06-20 17:06:53,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:06:53,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:06:53,432 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:06:53,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-20 17:06:53,432 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)] === [2024-06-20 17:06:53,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:06:53,433 INFO L85 PathProgramCache]: Analyzing trace with hash 369794843, now seen corresponding path program 1 times [2024-06-20 17:06:53,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:06:53,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925736924] [2024-06-20 17:06:53,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:06:53,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:06:53,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:06:55,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:06:55,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:06:55,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925736924] [2024-06-20 17:06:55,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925736924] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:06:55,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:06:55,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:06:55,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580585064] [2024-06-20 17:06:55,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:06:55,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:06:55,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:06:55,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:06:55,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:06:55,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:06:55,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 266 transitions, 3248 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:06:55,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:06:55,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:06:55,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:06:56,770 INFO L124 PetriNetUnfolderBase]: 2119/3500 cut-off events. [2024-06-20 17:06:56,771 INFO L125 PetriNetUnfolderBase]: For 229866/229868 co-relation queries the response was YES. [2024-06-20 17:06:56,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25384 conditions, 3500 events. 2119/3500 cut-off events. For 229866/229868 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 20454 event pairs, 484 based on Foata normal form. 1/3500 useless extension candidates. Maximal degree in co-relation 25272. Up to 3266 conditions per place. [2024-06-20 17:06:56,802 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 248 selfloop transitions, 33 changer transitions 0/286 dead transitions. [2024-06-20 17:06:56,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 286 transitions, 3922 flow [2024-06-20 17:06:56,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:06:56,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:06:56,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-20 17:06:56,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-20 17:06:56,804 INFO L175 Difference]: Start difference. First operand has 229 places, 266 transitions, 3248 flow. Second operand 8 states and 126 transitions. [2024-06-20 17:06:56,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 286 transitions, 3922 flow [2024-06-20 17:06:57,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 286 transitions, 3854 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-20 17:06:57,254 INFO L231 Difference]: Finished difference. Result has 230 places, 269 transitions, 3324 flow [2024-06-20 17:06:57,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3180, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3324, PETRI_PLACES=230, PETRI_TRANSITIONS=269} [2024-06-20 17:06:57,272 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 187 predicate places. [2024-06-20 17:06:57,272 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 269 transitions, 3324 flow [2024-06-20 17:06:57,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:06:57,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:06:57,272 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:06:57,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-20 17:06:57,273 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)] === [2024-06-20 17:06:57,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:06:57,273 INFO L85 PathProgramCache]: Analyzing trace with hash -379225371, now seen corresponding path program 2 times [2024-06-20 17:06:57,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:06:57,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456989581] [2024-06-20 17:06:57,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:06:57,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:06:57,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:06:59,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:06:59,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:06:59,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456989581] [2024-06-20 17:06:59,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456989581] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:06:59,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:06:59,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:06:59,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527015783] [2024-06-20 17:06:59,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:06:59,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:06:59,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:06:59,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:06:59,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:06:59,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:06:59,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 269 transitions, 3324 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:06:59,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:06:59,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:06:59,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:07:00,529 INFO L124 PetriNetUnfolderBase]: 2132/3523 cut-off events. [2024-06-20 17:07:00,529 INFO L125 PetriNetUnfolderBase]: For 238381/238383 co-relation queries the response was YES. [2024-06-20 17:07:00,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25918 conditions, 3523 events. 2132/3523 cut-off events. For 238381/238383 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 20626 event pairs, 476 based on Foata normal form. 1/3524 useless extension candidates. Maximal degree in co-relation 25805. Up to 3260 conditions per place. [2024-06-20 17:07:00,558 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 255 selfloop transitions, 35 changer transitions 0/295 dead transitions. [2024-06-20 17:07:00,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 295 transitions, 4360 flow [2024-06-20 17:07:00,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:07:00,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:07:00,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-20 17:07:00,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-20 17:07:00,560 INFO L175 Difference]: Start difference. First operand has 230 places, 269 transitions, 3324 flow. Second operand 8 states and 132 transitions. [2024-06-20 17:07:00,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 295 transitions, 4360 flow [2024-06-20 17:07:00,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 295 transitions, 4238 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-20 17:07:00,976 INFO L231 Difference]: Finished difference. Result has 233 places, 275 transitions, 3419 flow [2024-06-20 17:07:00,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3202, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3419, PETRI_PLACES=233, PETRI_TRANSITIONS=275} [2024-06-20 17:07:00,976 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 190 predicate places. [2024-06-20 17:07:00,977 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 275 transitions, 3419 flow [2024-06-20 17:07:00,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:07:00,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:07:00,977 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:07:00,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-20 17:07:00,977 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)] === [2024-06-20 17:07:00,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:07:00,982 INFO L85 PathProgramCache]: Analyzing trace with hash -386844148, now seen corresponding path program 4 times [2024-06-20 17:07:00,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:07:00,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7540622] [2024-06-20 17:07:00,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:07:00,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:07:00,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:07:02,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:07:02,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:07:02,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7540622] [2024-06-20 17:07:02,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7540622] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:07:02,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:07:02,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:07:02,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050499755] [2024-06-20 17:07:02,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:07:02,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:07:02,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:07:02,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:07:02,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:07:02,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:07:02,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 275 transitions, 3419 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:07:02,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:07:02,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:07:02,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:07:03,768 INFO L124 PetriNetUnfolderBase]: 2137/3530 cut-off events. [2024-06-20 17:07:03,768 INFO L125 PetriNetUnfolderBase]: For 247778/247780 co-relation queries the response was YES. [2024-06-20 17:07:03,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26412 conditions, 3530 events. 2137/3530 cut-off events. For 247778/247780 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 20690 event pairs, 476 based on Foata normal form. 1/3531 useless extension candidates. Maximal degree in co-relation 26297. Up to 3288 conditions per place. [2024-06-20 17:07:03,802 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 259 selfloop transitions, 31 changer transitions 0/295 dead transitions. [2024-06-20 17:07:03,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 295 transitions, 4215 flow [2024-06-20 17:07:03,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:07:03,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:07:03,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-20 17:07:03,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3979591836734694 [2024-06-20 17:07:03,804 INFO L175 Difference]: Start difference. First operand has 233 places, 275 transitions, 3419 flow. Second operand 7 states and 117 transitions. [2024-06-20 17:07:03,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 295 transitions, 4215 flow [2024-06-20 17:07:04,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 295 transitions, 4100 flow, removed 40 selfloop flow, removed 4 redundant places. [2024-06-20 17:07:04,208 INFO L231 Difference]: Finished difference. Result has 236 places, 278 transitions, 3417 flow [2024-06-20 17:07:04,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3307, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3417, PETRI_PLACES=236, PETRI_TRANSITIONS=278} [2024-06-20 17:07:04,208 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 193 predicate places. [2024-06-20 17:07:04,208 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 278 transitions, 3417 flow [2024-06-20 17:07:04,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:07:04,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:07:04,209 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:07:04,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-20 17:07:04,209 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)] === [2024-06-20 17:07:04,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:07:04,209 INFO L85 PathProgramCache]: Analyzing trace with hash -386849728, now seen corresponding path program 5 times [2024-06-20 17:07:04,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:07:04,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342384614] [2024-06-20 17:07:04,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:07:04,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:07:04,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:07:05,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:07:05,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:07:05,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342384614] [2024-06-20 17:07:05,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342384614] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:07:05,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:07:05,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:07:05,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653969086] [2024-06-20 17:07:05,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:07:05,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:07:05,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:07:05,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:07:05,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:07:05,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:07:05,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 278 transitions, 3417 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:07:05,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:07:05,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:07:05,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:07:06,930 INFO L124 PetriNetUnfolderBase]: 2134/3526 cut-off events. [2024-06-20 17:07:06,930 INFO L125 PetriNetUnfolderBase]: For 252558/252560 co-relation queries the response was YES. [2024-06-20 17:07:06,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26416 conditions, 3526 events. 2134/3526 cut-off events. For 252558/252560 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 20665 event pairs, 476 based on Foata normal form. 1/3527 useless extension candidates. Maximal degree in co-relation 26299. Up to 3299 conditions per place. [2024-06-20 17:07:06,961 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 271 selfloop transitions, 22 changer transitions 0/298 dead transitions. [2024-06-20 17:07:06,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 298 transitions, 4059 flow [2024-06-20 17:07:06,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:07:06,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:07:06,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-20 17:07:06,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4013605442176871 [2024-06-20 17:07:06,963 INFO L175 Difference]: Start difference. First operand has 236 places, 278 transitions, 3417 flow. Second operand 7 states and 118 transitions. [2024-06-20 17:07:06,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 298 transitions, 4059 flow [2024-06-20 17:07:07,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 298 transitions, 3982 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-20 17:07:07,384 INFO L231 Difference]: Finished difference. Result has 239 places, 278 transitions, 3390 flow [2024-06-20 17:07:07,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3340, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3390, PETRI_PLACES=239, PETRI_TRANSITIONS=278} [2024-06-20 17:07:07,384 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 196 predicate places. [2024-06-20 17:07:07,384 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 278 transitions, 3390 flow [2024-06-20 17:07:07,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:07:07,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:07:07,385 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:07:07,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-20 17:07:07,385 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)] === [2024-06-20 17:07:07,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:07:07,385 INFO L85 PathProgramCache]: Analyzing trace with hash -379492281, now seen corresponding path program 3 times [2024-06-20 17:07:07,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:07:07,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63685675] [2024-06-20 17:07:07,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:07:07,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:07:07,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:07:09,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:07:09,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:07:09,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63685675] [2024-06-20 17:07:09,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63685675] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:07:09,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:07:09,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:07:09,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92556926] [2024-06-20 17:07:09,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:07:09,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:07:09,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:07:09,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:07:09,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:07:09,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:07:09,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 278 transitions, 3390 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:07:09,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:07:09,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:07:09,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:07:10,551 INFO L124 PetriNetUnfolderBase]: 2139/3535 cut-off events. [2024-06-20 17:07:10,551 INFO L125 PetriNetUnfolderBase]: For 259814/259816 co-relation queries the response was YES. [2024-06-20 17:07:10,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26585 conditions, 3535 events. 2139/3535 cut-off events. For 259814/259816 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 20753 event pairs, 476 based on Foata normal form. 1/3536 useless extension candidates. Maximal degree in co-relation 26467. Up to 3289 conditions per place. [2024-06-20 17:07:10,583 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 259 selfloop transitions, 34 changer transitions 0/298 dead transitions. [2024-06-20 17:07:10,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 298 transitions, 4098 flow [2024-06-20 17:07:10,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:07:10,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:07:10,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-20 17:07:10,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-20 17:07:10,584 INFO L175 Difference]: Start difference. First operand has 239 places, 278 transitions, 3390 flow. Second operand 8 states and 128 transitions. [2024-06-20 17:07:10,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 298 transitions, 4098 flow [2024-06-20 17:07:11,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 298 transitions, 4019 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-20 17:07:11,092 INFO L231 Difference]: Finished difference. Result has 240 places, 281 transitions, 3467 flow [2024-06-20 17:07:11,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3311, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3467, PETRI_PLACES=240, PETRI_TRANSITIONS=281} [2024-06-20 17:07:11,092 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 197 predicate places. [2024-06-20 17:07:11,092 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 281 transitions, 3467 flow [2024-06-20 17:07:11,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:07:11,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:07:11,093 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:07:11,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-20 17:07:11,093 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)] === [2024-06-20 17:07:11,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:07:11,093 INFO L85 PathProgramCache]: Analyzing trace with hash -386843931, now seen corresponding path program 4 times [2024-06-20 17:07:11,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:07:11,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652040382] [2024-06-20 17:07:11,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:07:11,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:07:11,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:07:13,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:07:13,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:07:13,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652040382] [2024-06-20 17:07:13,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652040382] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:07:13,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:07:13,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:07:13,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491384325] [2024-06-20 17:07:13,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:07:13,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:07:13,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:07:13,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:07:13,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:07:13,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:07:13,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 281 transitions, 3467 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:07:13,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:07:13,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:07:13,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:07:14,668 INFO L124 PetriNetUnfolderBase]: 2136/3527 cut-off events. [2024-06-20 17:07:14,669 INFO L125 PetriNetUnfolderBase]: For 265825/265827 co-relation queries the response was YES. [2024-06-20 17:07:14,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26663 conditions, 3527 events. 2136/3527 cut-off events. For 265825/265827 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 20598 event pairs, 476 based on Foata normal form. 1/3528 useless extension candidates. Maximal degree in co-relation 26544. Up to 3299 conditions per place. [2024-06-20 17:07:14,697 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 275 selfloop transitions, 25 changer transitions 0/305 dead transitions. [2024-06-20 17:07:14,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 305 transitions, 4207 flow [2024-06-20 17:07:14,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:07:14,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:07:14,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-20 17:07:14,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-20 17:07:14,699 INFO L175 Difference]: Start difference. First operand has 240 places, 281 transitions, 3467 flow. Second operand 8 states and 130 transitions. [2024-06-20 17:07:14,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 305 transitions, 4207 flow [2024-06-20 17:07:15,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 305 transitions, 4079 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-20 17:07:15,194 INFO L231 Difference]: Finished difference. Result has 242 places, 284 transitions, 3483 flow [2024-06-20 17:07:15,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3339, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3483, PETRI_PLACES=242, PETRI_TRANSITIONS=284} [2024-06-20 17:07:15,195 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 199 predicate places. [2024-06-20 17:07:15,195 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 284 transitions, 3483 flow [2024-06-20 17:07:15,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:07:15,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:07:15,195 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:07:15,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-20 17:07:15,196 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)] === [2024-06-20 17:07:15,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:07:15,196 INFO L85 PathProgramCache]: Analyzing trace with hash -957419046, now seen corresponding path program 1 times [2024-06-20 17:07:15,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:07:15,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626019010] [2024-06-20 17:07:15,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:07:15,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:07:15,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:07:17,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:07:17,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:07:17,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626019010] [2024-06-20 17:07:17,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626019010] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:07:17,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:07:17,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:07:17,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518779052] [2024-06-20 17:07:17,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:07:17,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:07:17,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:07:17,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:07:17,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:07:17,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:07:17,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 284 transitions, 3483 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:07:17,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:07:17,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:07:17,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:07:19,022 INFO L124 PetriNetUnfolderBase]: 2149/3550 cut-off events. [2024-06-20 17:07:19,023 INFO L125 PetriNetUnfolderBase]: For 275852/275858 co-relation queries the response was YES. [2024-06-20 17:07:19,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27018 conditions, 3550 events. 2149/3550 cut-off events. For 275852/275858 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 20780 event pairs, 457 based on Foata normal form. 7/3557 useless extension candidates. Maximal degree in co-relation 26898. Up to 3176 conditions per place. [2024-06-20 17:07:19,058 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 253 selfloop transitions, 71 changer transitions 0/329 dead transitions. [2024-06-20 17:07:19,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 329 transitions, 4505 flow [2024-06-20 17:07:19,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:07:19,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:07:19,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-20 17:07:19,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-20 17:07:19,060 INFO L175 Difference]: Start difference. First operand has 242 places, 284 transitions, 3483 flow. Second operand 9 states and 161 transitions. [2024-06-20 17:07:19,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 329 transitions, 4505 flow [2024-06-20 17:07:19,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 329 transitions, 4389 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-20 17:07:19,525 INFO L231 Difference]: Finished difference. Result has 246 places, 290 transitions, 3672 flow [2024-06-20 17:07:19,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3367, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3672, PETRI_PLACES=246, PETRI_TRANSITIONS=290} [2024-06-20 17:07:19,526 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 203 predicate places. [2024-06-20 17:07:19,526 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 290 transitions, 3672 flow [2024-06-20 17:07:19,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:07:19,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:07:19,526 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:07:19,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-20 17:07:19,526 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)] === [2024-06-20 17:07:19,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:07:19,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1954981508, now seen corresponding path program 1 times [2024-06-20 17:07:19,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:07:19,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984540957] [2024-06-20 17:07:19,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:07:19,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:07:19,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:07:22,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:07:22,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:07:22,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984540957] [2024-06-20 17:07:22,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984540957] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:07:22,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:07:22,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:07:22,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534488443] [2024-06-20 17:07:22,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:07:22,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:07:22,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:07:22,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:07:22,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:07:22,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:07:22,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 290 transitions, 3672 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:07:22,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:07:22,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:07:22,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:07:23,490 INFO L124 PetriNetUnfolderBase]: 2170/3582 cut-off events. [2024-06-20 17:07:23,490 INFO L125 PetriNetUnfolderBase]: For 292665/292671 co-relation queries the response was YES. [2024-06-20 17:07:23,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28130 conditions, 3582 events. 2170/3582 cut-off events. For 292665/292671 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 21028 event pairs, 472 based on Foata normal form. 7/3588 useless extension candidates. Maximal degree in co-relation 28008. Up to 3199 conditions per place. [2024-06-20 17:07:23,597 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 248 selfloop transitions, 73 changer transitions 0/326 dead transitions. [2024-06-20 17:07:23,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 326 transitions, 4826 flow [2024-06-20 17:07:23,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:07:23,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:07:23,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-20 17:07:23,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43537414965986393 [2024-06-20 17:07:23,607 INFO L175 Difference]: Start difference. First operand has 246 places, 290 transitions, 3672 flow. Second operand 7 states and 128 transitions. [2024-06-20 17:07:23,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 326 transitions, 4826 flow [2024-06-20 17:07:24,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 326 transitions, 4686 flow, removed 44 selfloop flow, removed 4 redundant places. [2024-06-20 17:07:24,063 INFO L231 Difference]: Finished difference. Result has 249 places, 299 transitions, 3844 flow [2024-06-20 17:07:24,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3532, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3844, PETRI_PLACES=249, PETRI_TRANSITIONS=299} [2024-06-20 17:07:24,064 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 206 predicate places. [2024-06-20 17:07:24,064 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 299 transitions, 3844 flow [2024-06-20 17:07:24,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:07:24,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:07:24,065 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:07:24,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-20 17:07:24,065 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)] === [2024-06-20 17:07:24,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:07:24,066 INFO L85 PathProgramCache]: Analyzing trace with hash -952950396, now seen corresponding path program 2 times [2024-06-20 17:07:24,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:07:24,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821247835] [2024-06-20 17:07:24,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:07:24,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:07:24,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:07:26,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:07:26,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:07:26,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821247835] [2024-06-20 17:07:26,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821247835] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:07:26,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:07:26,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:07:26,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438002847] [2024-06-20 17:07:26,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:07:26,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:07:26,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:07:26,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:07:26,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:07:26,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:07:26,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 299 transitions, 3844 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:07:26,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:07:26,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:07:26,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:07:28,089 INFO L124 PetriNetUnfolderBase]: 2183/3595 cut-off events. [2024-06-20 17:07:28,090 INFO L125 PetriNetUnfolderBase]: For 303904/303906 co-relation queries the response was YES. [2024-06-20 17:07:28,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28620 conditions, 3595 events. 2183/3595 cut-off events. For 303904/303906 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 21001 event pairs, 483 based on Foata normal form. 1/3594 useless extension candidates. Maximal degree in co-relation 28496. Up to 2955 conditions per place. [2024-06-20 17:07:28,128 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 206 selfloop transitions, 128 changer transitions 0/339 dead transitions. [2024-06-20 17:07:28,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 339 transitions, 5134 flow [2024-06-20 17:07:28,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:07:28,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:07:28,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-20 17:07:28,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-20 17:07:28,130 INFO L175 Difference]: Start difference. First operand has 249 places, 299 transitions, 3844 flow. Second operand 8 states and 147 transitions. [2024-06-20 17:07:28,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 339 transitions, 5134 flow [2024-06-20 17:07:28,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 339 transitions, 5008 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-20 17:07:28,604 INFO L231 Difference]: Finished difference. Result has 256 places, 308 transitions, 4313 flow [2024-06-20 17:07:28,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3718, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4313, PETRI_PLACES=256, PETRI_TRANSITIONS=308} [2024-06-20 17:07:28,605 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 213 predicate places. [2024-06-20 17:07:28,605 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 308 transitions, 4313 flow [2024-06-20 17:07:28,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:07:28,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:07:28,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:07:28,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-20 17:07:28,605 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)] === [2024-06-20 17:07:28,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:07:28,606 INFO L85 PathProgramCache]: Analyzing trace with hash -952651866, now seen corresponding path program 3 times [2024-06-20 17:07:28,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:07:28,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028506421] [2024-06-20 17:07:28,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:07:28,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:07:28,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:07:31,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:07:31,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:07:31,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028506421] [2024-06-20 17:07:31,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028506421] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:07:31,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:07:31,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:07:31,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132118523] [2024-06-20 17:07:31,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:07:31,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:07:31,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:07:31,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:07:31,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:07:31,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:07:31,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 308 transitions, 4313 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:07:31,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:07:31,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:07:31,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:07:32,675 INFO L124 PetriNetUnfolderBase]: 2188/3604 cut-off events. [2024-06-20 17:07:32,675 INFO L125 PetriNetUnfolderBase]: For 318904/318906 co-relation queries the response was YES. [2024-06-20 17:07:32,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29834 conditions, 3604 events. 2188/3604 cut-off events. For 318904/318906 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 21141 event pairs, 480 based on Foata normal form. 1/3603 useless extension candidates. Maximal degree in co-relation 29707. Up to 2959 conditions per place. [2024-06-20 17:07:32,714 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 202 selfloop transitions, 131 changer transitions 0/338 dead transitions. [2024-06-20 17:07:32,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 338 transitions, 5469 flow [2024-06-20 17:07:32,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:07:32,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:07:32,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-20 17:07:32,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-20 17:07:32,715 INFO L175 Difference]: Start difference. First operand has 256 places, 308 transitions, 4313 flow. Second operand 8 states and 143 transitions. [2024-06-20 17:07:32,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 338 transitions, 5469 flow [2024-06-20 17:07:33,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 338 transitions, 5272 flow, removed 68 selfloop flow, removed 3 redundant places. [2024-06-20 17:07:33,406 INFO L231 Difference]: Finished difference. Result has 261 places, 311 transitions, 4476 flow [2024-06-20 17:07:33,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4138, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4476, PETRI_PLACES=261, PETRI_TRANSITIONS=311} [2024-06-20 17:07:33,406 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 218 predicate places. [2024-06-20 17:07:33,406 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 311 transitions, 4476 flow [2024-06-20 17:07:33,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:07:33,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:07:33,407 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:07:33,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-20 17:07:33,407 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)] === [2024-06-20 17:07:33,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:07:33,407 INFO L85 PathProgramCache]: Analyzing trace with hash -952651680, now seen corresponding path program 2 times [2024-06-20 17:07:33,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:07:33,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887762553] [2024-06-20 17:07:33,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:07:33,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:07:33,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:07:35,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:07:35,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:07:35,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887762553] [2024-06-20 17:07:35,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887762553] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:07:35,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:07:35,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:07:35,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470074828] [2024-06-20 17:07:35,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:07:35,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:07:35,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:07:35,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:07:35,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:07:35,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:07:35,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 311 transitions, 4476 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:07:35,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:07:35,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:07:35,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:07:37,366 INFO L124 PetriNetUnfolderBase]: 2193/3620 cut-off events. [2024-06-20 17:07:37,367 INFO L125 PetriNetUnfolderBase]: For 322555/322561 co-relation queries the response was YES. [2024-06-20 17:07:37,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29578 conditions, 3620 events. 2193/3620 cut-off events. For 322555/322561 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 21287 event pairs, 472 based on Foata normal form. 7/3626 useless extension candidates. Maximal degree in co-relation 29449. Up to 3230 conditions per place. [2024-06-20 17:07:37,404 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 259 selfloop transitions, 77 changer transitions 0/341 dead transitions. [2024-06-20 17:07:37,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 341 transitions, 5428 flow [2024-06-20 17:07:37,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:07:37,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:07:37,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-20 17:07:37,406 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-20 17:07:37,406 INFO L175 Difference]: Start difference. First operand has 261 places, 311 transitions, 4476 flow. Second operand 8 states and 139 transitions. [2024-06-20 17:07:37,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 341 transitions, 5428 flow [2024-06-20 17:07:38,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 341 transitions, 5151 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-20 17:07:38,123 INFO L231 Difference]: Finished difference. Result has 264 places, 314 transitions, 4417 flow [2024-06-20 17:07:38,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4203, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4417, PETRI_PLACES=264, PETRI_TRANSITIONS=314} [2024-06-20 17:07:38,123 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 221 predicate places. [2024-06-20 17:07:38,123 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 314 transitions, 4417 flow [2024-06-20 17:07:38,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:07:38,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:07:38,124 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:07:38,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-20 17:07:38,124 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)] === [2024-06-20 17:07:38,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:07:38,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1399765516, now seen corresponding path program 1 times [2024-06-20 17:07:38,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:07:38,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759466277] [2024-06-20 17:07:38,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:07:38,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:07:38,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:07:40,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:07:40,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:07:40,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759466277] [2024-06-20 17:07:40,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759466277] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:07:40,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:07:40,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:07:40,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628870638] [2024-06-20 17:07:40,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:07:40,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:07:40,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:07:40,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:07:40,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:07:40,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:07:40,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 314 transitions, 4417 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:07:40,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:07:40,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:07:40,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:07:41,740 INFO L124 PetriNetUnfolderBase]: 2198/3625 cut-off events. [2024-06-20 17:07:41,740 INFO L125 PetriNetUnfolderBase]: For 329728/329734 co-relation queries the response was YES. [2024-06-20 17:07:41,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29578 conditions, 3625 events. 2198/3625 cut-off events. For 329728/329734 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 21264 event pairs, 471 based on Foata normal form. 7/3631 useless extension candidates. Maximal degree in co-relation 29448. Up to 3234 conditions per place. [2024-06-20 17:07:41,779 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 259 selfloop transitions, 80 changer transitions 0/344 dead transitions. [2024-06-20 17:07:41,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 344 transitions, 5397 flow [2024-06-20 17:07:41,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:07:41,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:07:41,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-20 17:07:41,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-20 17:07:41,781 INFO L175 Difference]: Start difference. First operand has 264 places, 314 transitions, 4417 flow. Second operand 8 states and 139 transitions. [2024-06-20 17:07:41,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 344 transitions, 5397 flow [2024-06-20 17:07:42,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 344 transitions, 5219 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-20 17:07:42,578 INFO L231 Difference]: Finished difference. Result has 266 places, 317 transitions, 4489 flow [2024-06-20 17:07:42,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4239, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4489, PETRI_PLACES=266, PETRI_TRANSITIONS=317} [2024-06-20 17:07:42,578 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 223 predicate places. [2024-06-20 17:07:42,579 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 317 transitions, 4489 flow [2024-06-20 17:07:42,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:07:42,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:07:42,579 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:07:42,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-20 17:07:42,579 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)] === [2024-06-20 17:07:42,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:07:42,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1395123886, now seen corresponding path program 2 times [2024-06-20 17:07:42,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:07:42,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698636083] [2024-06-20 17:07:42,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:07:42,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:07:42,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:07:45,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:07:45,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:07:45,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698636083] [2024-06-20 17:07:45,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698636083] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:07:45,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:07:45,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:07:45,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352325090] [2024-06-20 17:07:45,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:07:45,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:07:45,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:07:45,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:07:45,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:07:45,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:07:45,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 317 transitions, 4489 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:07:45,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:07:45,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:07:45,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:07:46,339 INFO L124 PetriNetUnfolderBase]: 2208/3637 cut-off events. [2024-06-20 17:07:46,340 INFO L125 PetriNetUnfolderBase]: For 341211/341213 co-relation queries the response was YES. [2024-06-20 17:07:46,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30067 conditions, 3637 events. 2208/3637 cut-off events. For 341211/341213 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 21281 event pairs, 460 based on Foata normal form. 2/3639 useless extension candidates. Maximal degree in co-relation 29936. Up to 3310 conditions per place. [2024-06-20 17:07:46,380 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 282 selfloop transitions, 57 changer transitions 0/344 dead transitions. [2024-06-20 17:07:46,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 344 transitions, 5493 flow [2024-06-20 17:07:46,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:07:46,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:07:46,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-20 17:07:46,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-20 17:07:46,382 INFO L175 Difference]: Start difference. First operand has 266 places, 317 transitions, 4489 flow. Second operand 9 states and 147 transitions. [2024-06-20 17:07:46,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 344 transitions, 5493 flow [2024-06-20 17:07:47,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 344 transitions, 5263 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-20 17:07:47,167 INFO L231 Difference]: Finished difference. Result has 269 places, 321 transitions, 4496 flow [2024-06-20 17:07:47,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4261, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4496, PETRI_PLACES=269, PETRI_TRANSITIONS=321} [2024-06-20 17:07:47,167 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 226 predicate places. [2024-06-20 17:07:47,167 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 321 transitions, 4496 flow [2024-06-20 17:07:47,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:07:47,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:07:47,168 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:07:47,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-20 17:07:47,168 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)] === [2024-06-20 17:07:47,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:07:47,168 INFO L85 PathProgramCache]: Analyzing trace with hash 2132470334, now seen corresponding path program 3 times [2024-06-20 17:07:47,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:07:47,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337992780] [2024-06-20 17:07:47,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:07:47,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:07:47,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:07:49,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:07:49,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:07:49,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337992780] [2024-06-20 17:07:49,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337992780] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:07:49,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:07:49,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:07:49,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811921123] [2024-06-20 17:07:49,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:07:49,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:07:49,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:07:49,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:07:49,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:07:49,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:07:49,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 321 transitions, 4496 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:07:49,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:07:49,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:07:49,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:07:50,967 INFO L124 PetriNetUnfolderBase]: 2239/3688 cut-off events. [2024-06-20 17:07:50,967 INFO L125 PetriNetUnfolderBase]: For 356813/356815 co-relation queries the response was YES. [2024-06-20 17:07:50,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31005 conditions, 3688 events. 2239/3688 cut-off events. For 356813/356815 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 21636 event pairs, 462 based on Foata normal form. 2/3690 useless extension candidates. Maximal degree in co-relation 30873. Up to 3316 conditions per place. [2024-06-20 17:07:51,005 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 287 selfloop transitions, 64 changer transitions 0/356 dead transitions. [2024-06-20 17:07:51,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 356 transitions, 5785 flow [2024-06-20 17:07:51,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:07:51,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:07:51,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-20 17:07:51,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-06-20 17:07:51,008 INFO L175 Difference]: Start difference. First operand has 269 places, 321 transitions, 4496 flow. Second operand 9 states and 151 transitions. [2024-06-20 17:07:51,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 356 transitions, 5785 flow [2024-06-20 17:07:51,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 356 transitions, 5582 flow, removed 48 selfloop flow, removed 7 redundant places. [2024-06-20 17:07:51,792 INFO L231 Difference]: Finished difference. Result has 272 places, 332 transitions, 4681 flow [2024-06-20 17:07:51,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4293, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4681, PETRI_PLACES=272, PETRI_TRANSITIONS=332} [2024-06-20 17:07:51,792 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 229 predicate places. [2024-06-20 17:07:51,792 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 332 transitions, 4681 flow [2024-06-20 17:07:51,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:07:51,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:07:51,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:07:51,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-20 17:07:51,793 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)] === [2024-06-20 17:07:51,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:07:51,793 INFO L85 PathProgramCache]: Analyzing trace with hash 2132232998, now seen corresponding path program 3 times [2024-06-20 17:07:51,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:07:51,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766839080] [2024-06-20 17:07:51,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:07:51,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:07:51,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:07:54,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:07:54,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:07:54,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766839080] [2024-06-20 17:07:54,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766839080] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:07:54,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:07:54,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:07:54,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879537578] [2024-06-20 17:07:54,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:07:54,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:07:54,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:07:54,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:07:54,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:07:54,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:07:54,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 332 transitions, 4681 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:07:54,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:07:54,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:07:54,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:07:55,762 INFO L124 PetriNetUnfolderBase]: 2236/3684 cut-off events. [2024-06-20 17:07:55,762 INFO L125 PetriNetUnfolderBase]: For 363058/363060 co-relation queries the response was YES. [2024-06-20 17:07:55,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31467 conditions, 3684 events. 2236/3684 cut-off events. For 363058/363060 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 21638 event pairs, 462 based on Foata normal form. 1/3685 useless extension candidates. Maximal degree in co-relation 31333. Up to 3358 conditions per place. [2024-06-20 17:07:55,801 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 295 selfloop transitions, 53 changer transitions 0/353 dead transitions. [2024-06-20 17:07:55,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 353 transitions, 5447 flow [2024-06-20 17:07:55,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:07:55,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:07:55,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-20 17:07:55,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-20 17:07:55,803 INFO L175 Difference]: Start difference. First operand has 272 places, 332 transitions, 4681 flow. Second operand 8 states and 133 transitions. [2024-06-20 17:07:55,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 353 transitions, 5447 flow [2024-06-20 17:07:56,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 353 transitions, 5245 flow, removed 71 selfloop flow, removed 5 redundant places. [2024-06-20 17:07:56,570 INFO L231 Difference]: Finished difference. Result has 275 places, 332 transitions, 4599 flow [2024-06-20 17:07:56,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4479, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4599, PETRI_PLACES=275, PETRI_TRANSITIONS=332} [2024-06-20 17:07:56,570 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 232 predicate places. [2024-06-20 17:07:56,571 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 332 transitions, 4599 flow [2024-06-20 17:07:56,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:07:56,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:07:56,571 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:07:56,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-20 17:07:56,571 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)] === [2024-06-20 17:07:56,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:07:56,572 INFO L85 PathProgramCache]: Analyzing trace with hash -775520346, now seen corresponding path program 4 times [2024-06-20 17:07:56,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:07:56,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847197157] [2024-06-20 17:07:56,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:07:56,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:07:56,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:07:59,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:07:59,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:07:59,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847197157] [2024-06-20 17:07:59,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847197157] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:07:59,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:07:59,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:07:59,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465049663] [2024-06-20 17:07:59,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:07:59,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:07:59,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:07:59,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:07:59,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:07:59,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:07:59,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 332 transitions, 4599 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:07:59,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:07:59,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:07:59,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:08:00,902 INFO L124 PetriNetUnfolderBase]: 2249/3706 cut-off events. [2024-06-20 17:08:00,903 INFO L125 PetriNetUnfolderBase]: For 375047/375049 co-relation queries the response was YES. [2024-06-20 17:08:00,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31744 conditions, 3706 events. 2249/3706 cut-off events. For 375047/375049 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 21783 event pairs, 460 based on Foata normal form. 1/3707 useless extension candidates. Maximal degree in co-relation 31608. Up to 3367 conditions per place. [2024-06-20 17:08:00,947 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 298 selfloop transitions, 58 changer transitions 0/361 dead transitions. [2024-06-20 17:08:00,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 361 transitions, 5669 flow [2024-06-20 17:08:00,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:08:00,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:08:00,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-20 17:08:00,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3862433862433862 [2024-06-20 17:08:00,949 INFO L175 Difference]: Start difference. First operand has 275 places, 332 transitions, 4599 flow. Second operand 9 states and 146 transitions. [2024-06-20 17:08:00,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 361 transitions, 5669 flow [2024-06-20 17:08:01,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 361 transitions, 5563 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-20 17:08:01,789 INFO L231 Difference]: Finished difference. Result has 278 places, 338 transitions, 4774 flow [2024-06-20 17:08:01,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4493, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4774, PETRI_PLACES=278, PETRI_TRANSITIONS=338} [2024-06-20 17:08:01,789 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 235 predicate places. [2024-06-20 17:08:01,789 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 338 transitions, 4774 flow [2024-06-20 17:08:01,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:08:01,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:08:01,790 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:08:01,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-20 17:08:01,790 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)] === [2024-06-20 17:08:01,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:08:01,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1222387918, now seen corresponding path program 1 times [2024-06-20 17:08:01,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:08:01,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545989724] [2024-06-20 17:08:01,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:08:01,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:08:01,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:08:04,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:08:04,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:08:04,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545989724] [2024-06-20 17:08:04,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545989724] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:08:04,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:08:04,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:08:04,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623287770] [2024-06-20 17:08:04,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:08:04,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:08:04,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:08:04,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:08:04,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:08:04,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 17:08:04,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 338 transitions, 4774 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:08:04,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:08:04,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 17:08:04,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:08:05,861 INFO L124 PetriNetUnfolderBase]: 2153/3587 cut-off events. [2024-06-20 17:08:05,861 INFO L125 PetriNetUnfolderBase]: For 409988/410013 co-relation queries the response was YES. [2024-06-20 17:08:05,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31506 conditions, 3587 events. 2153/3587 cut-off events. For 409988/410013 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 21453 event pairs, 442 based on Foata normal form. 24/3585 useless extension candidates. Maximal degree in co-relation 31368. Up to 3124 conditions per place. [2024-06-20 17:08:05,904 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 285 selfloop transitions, 45 changer transitions 0/364 dead transitions. [2024-06-20 17:08:05,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 364 transitions, 5558 flow [2024-06-20 17:08:05,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:08:05,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:08:05,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-20 17:08:05,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-06-20 17:08:05,913 INFO L175 Difference]: Start difference. First operand has 278 places, 338 transitions, 4774 flow. Second operand 9 states and 151 transitions. [2024-06-20 17:08:05,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 364 transitions, 5558 flow [2024-06-20 17:08:06,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 364 transitions, 5397 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-20 17:08:06,740 INFO L231 Difference]: Finished difference. Result has 281 places, 339 transitions, 4736 flow [2024-06-20 17:08:06,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4613, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4736, PETRI_PLACES=281, PETRI_TRANSITIONS=339} [2024-06-20 17:08:06,741 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 238 predicate places. [2024-06-20 17:08:06,741 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 339 transitions, 4736 flow [2024-06-20 17:08:06,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:08:06,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:08:06,741 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:08:06,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-20 17:08:06,741 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)] === [2024-06-20 17:08:06,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:08:06,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1776252500, now seen corresponding path program 5 times [2024-06-20 17:08:06,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:08:06,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723508320] [2024-06-20 17:08:06,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:08:06,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:08:06,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:08:09,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:08:09,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:08:09,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723508320] [2024-06-20 17:08:09,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723508320] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:08:09,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:08:09,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:08:09,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769869168] [2024-06-20 17:08:09,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:08:09,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:08:09,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:08:09,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:08:09,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:08:09,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:08:09,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 339 transitions, 4736 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:08:09,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:08:09,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:08:09,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:08:10,812 INFO L124 PetriNetUnfolderBase]: 2290/3748 cut-off events. [2024-06-20 17:08:10,812 INFO L125 PetriNetUnfolderBase]: For 398085/398091 co-relation queries the response was YES. [2024-06-20 17:08:10,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32586 conditions, 3748 events. 2290/3748 cut-off events. For 398085/398091 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 21975 event pairs, 550 based on Foata normal form. 2/3744 useless extension candidates. Maximal degree in co-relation 32447. Up to 3098 conditions per place. [2024-06-20 17:08:10,858 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 219 selfloop transitions, 149 changer transitions 0/373 dead transitions. [2024-06-20 17:08:10,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 373 transitions, 6220 flow [2024-06-20 17:08:10,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:08:10,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:08:10,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-20 17:08:10,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-20 17:08:10,860 INFO L175 Difference]: Start difference. First operand has 281 places, 339 transitions, 4736 flow. Second operand 8 states and 143 transitions. [2024-06-20 17:08:10,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 373 transitions, 6220 flow [2024-06-20 17:08:11,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 373 transitions, 6123 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-20 17:08:11,793 INFO L231 Difference]: Finished difference. Result has 282 places, 345 transitions, 5149 flow [2024-06-20 17:08:11,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4639, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5149, PETRI_PLACES=282, PETRI_TRANSITIONS=345} [2024-06-20 17:08:11,793 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 239 predicate places. [2024-06-20 17:08:11,793 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 345 transitions, 5149 flow [2024-06-20 17:08:11,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:08:11,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:08:11,794 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:08:11,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-20 17:08:11,794 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)] === [2024-06-20 17:08:11,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:08:11,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1775953598, now seen corresponding path program 4 times [2024-06-20 17:08:11,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:08:11,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946276111] [2024-06-20 17:08:11,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:08:11,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:08:11,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:08:14,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:08:14,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:08:14,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946276111] [2024-06-20 17:08:14,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946276111] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:08:14,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:08:14,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:08:14,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089004482] [2024-06-20 17:08:14,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:08:14,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:08:14,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:08:14,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:08:14,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:08:14,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:08:14,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 345 transitions, 5149 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:08:14,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:08:14,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:08:14,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:08:15,476 INFO L124 PetriNetUnfolderBase]: 2295/3767 cut-off events. [2024-06-20 17:08:15,476 INFO L125 PetriNetUnfolderBase]: For 408746/408758 co-relation queries the response was YES. [2024-06-20 17:08:15,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33097 conditions, 3767 events. 2295/3767 cut-off events. For 408746/408758 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 22148 event pairs, 494 based on Foata normal form. 13/3778 useless extension candidates. Maximal degree in co-relation 32957. Up to 3376 conditions per place. [2024-06-20 17:08:15,517 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 284 selfloop transitions, 83 changer transitions 0/372 dead transitions. [2024-06-20 17:08:15,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 372 transitions, 6211 flow [2024-06-20 17:08:15,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:08:15,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:08:15,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-20 17:08:15,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-20 17:08:15,518 INFO L175 Difference]: Start difference. First operand has 282 places, 345 transitions, 5149 flow. Second operand 8 states and 134 transitions. [2024-06-20 17:08:15,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 372 transitions, 6211 flow [2024-06-20 17:08:16,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 372 transitions, 5937 flow, removed 63 selfloop flow, removed 5 redundant places. [2024-06-20 17:08:16,511 INFO L231 Difference]: Finished difference. Result has 285 places, 348 transitions, 5151 flow [2024-06-20 17:08:16,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4879, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5151, PETRI_PLACES=285, PETRI_TRANSITIONS=348} [2024-06-20 17:08:16,512 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 242 predicate places. [2024-06-20 17:08:16,512 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 348 transitions, 5151 flow [2024-06-20 17:08:16,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:08:16,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:08:16,512 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:08:16,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-20 17:08:16,513 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)] === [2024-06-20 17:08:16,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:08:16,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1988103554, now seen corresponding path program 4 times [2024-06-20 17:08:16,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:08:16,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709319347] [2024-06-20 17:08:16,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:08:16,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:08:16,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:08:18,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:08:18,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:08:18,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709319347] [2024-06-20 17:08:18,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709319347] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:08:18,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:08:18,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:08:18,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796284642] [2024-06-20 17:08:18,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:08:18,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:08:18,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:08:18,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:08:18,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:08:18,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:08:18,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 348 transitions, 5151 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:08:18,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:08:18,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:08:18,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:08:20,259 INFO L124 PetriNetUnfolderBase]: 2300/3795 cut-off events. [2024-06-20 17:08:20,259 INFO L125 PetriNetUnfolderBase]: For 415730/415754 co-relation queries the response was YES. [2024-06-20 17:08:20,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33237 conditions, 3795 events. 2300/3795 cut-off events. For 415730/415754 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 22471 event pairs, 498 based on Foata normal form. 25/3820 useless extension candidates. Maximal degree in co-relation 33096. Up to 3385 conditions per place. [2024-06-20 17:08:20,300 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 293 selfloop transitions, 77 changer transitions 0/375 dead transitions. [2024-06-20 17:08:20,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 375 transitions, 6350 flow [2024-06-20 17:08:20,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:08:20,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:08:20,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-20 17:08:20,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41836734693877553 [2024-06-20 17:08:20,301 INFO L175 Difference]: Start difference. First operand has 285 places, 348 transitions, 5151 flow. Second operand 7 states and 123 transitions. [2024-06-20 17:08:20,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 375 transitions, 6350 flow [2024-06-20 17:08:21,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 375 transitions, 6092 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-06-20 17:08:21,182 INFO L231 Difference]: Finished difference. Result has 286 places, 351 transitions, 5120 flow [2024-06-20 17:08:21,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4899, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5120, PETRI_PLACES=286, PETRI_TRANSITIONS=351} [2024-06-20 17:08:21,182 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 243 predicate places. [2024-06-20 17:08:21,182 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 351 transitions, 5120 flow [2024-06-20 17:08:21,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:08:21,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:08:21,183 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:08:21,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-20 17:08:21,183 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)] === [2024-06-20 17:08:21,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:08:21,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1604378112, now seen corresponding path program 6 times [2024-06-20 17:08:21,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:08:21,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562407319] [2024-06-20 17:08:21,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:08:21,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:08:21,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:08:23,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:08:23,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:08:23,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562407319] [2024-06-20 17:08:23,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562407319] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:08:23,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:08:23,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:08:23,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50086548] [2024-06-20 17:08:23,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:08:23,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:08:23,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:08:23,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:08:23,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:08:23,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:08:23,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 351 transitions, 5120 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:08:23,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:08:23,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:08:23,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:08:25,261 INFO L124 PetriNetUnfolderBase]: 2305/3763 cut-off events. [2024-06-20 17:08:25,261 INFO L125 PetriNetUnfolderBase]: For 426203/426209 co-relation queries the response was YES. [2024-06-20 17:08:25,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33293 conditions, 3763 events. 2305/3763 cut-off events. For 426203/426209 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 22022 event pairs, 542 based on Foata normal form. 2/3759 useless extension candidates. Maximal degree in co-relation 33151. Up to 3113 conditions per place. [2024-06-20 17:08:25,302 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 221 selfloop transitions, 152 changer transitions 0/378 dead transitions. [2024-06-20 17:08:25,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 378 transitions, 6496 flow [2024-06-20 17:08:25,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:08:25,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:08:25,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-20 17:08:25,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-20 17:08:25,304 INFO L175 Difference]: Start difference. First operand has 286 places, 351 transitions, 5120 flow. Second operand 8 states and 140 transitions. [2024-06-20 17:08:25,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 378 transitions, 6496 flow [2024-06-20 17:08:26,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 378 transitions, 6194 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-20 17:08:26,505 INFO L231 Difference]: Finished difference. Result has 287 places, 354 transitions, 5208 flow [2024-06-20 17:08:26,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4818, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5208, PETRI_PLACES=287, PETRI_TRANSITIONS=354} [2024-06-20 17:08:26,506 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 244 predicate places. [2024-06-20 17:08:26,506 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 354 transitions, 5208 flow [2024-06-20 17:08:26,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:08:26,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:08:26,507 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:08:26,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-20 17:08:26,507 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)] === [2024-06-20 17:08:26,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:08:26,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1267565550, now seen corresponding path program 5 times [2024-06-20 17:08:26,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:08:26,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164965152] [2024-06-20 17:08:26,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:08:26,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:08:26,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:08:29,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:08:29,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:08:29,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164965152] [2024-06-20 17:08:29,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164965152] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:08:29,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:08:29,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:08:29,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087222718] [2024-06-20 17:08:29,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:08:29,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:08:29,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:08:29,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:08:29,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:08:29,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:08:29,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 354 transitions, 5208 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:08:29,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:08:29,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:08:29,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:08:30,964 INFO L124 PetriNetUnfolderBase]: 2310/3804 cut-off events. [2024-06-20 17:08:30,965 INFO L125 PetriNetUnfolderBase]: For 433451/433463 co-relation queries the response was YES. [2024-06-20 17:08:30,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33621 conditions, 3804 events. 2310/3804 cut-off events. For 433451/433463 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 22488 event pairs, 501 based on Foata normal form. 13/3815 useless extension candidates. Maximal degree in co-relation 33480. Up to 3398 conditions per place. [2024-06-20 17:08:31,008 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 290 selfloop transitions, 86 changer transitions 0/381 dead transitions. [2024-06-20 17:08:31,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 381 transitions, 6252 flow [2024-06-20 17:08:31,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:08:31,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:08:31,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-20 17:08:31,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-20 17:08:31,009 INFO L175 Difference]: Start difference. First operand has 287 places, 354 transitions, 5208 flow. Second operand 8 states and 134 transitions. [2024-06-20 17:08:31,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 381 transitions, 6252 flow [2024-06-20 17:08:32,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 381 transitions, 5901 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-20 17:08:32,139 INFO L231 Difference]: Finished difference. Result has 290 places, 357 transitions, 5091 flow [2024-06-20 17:08:32,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4861, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5091, PETRI_PLACES=290, PETRI_TRANSITIONS=357} [2024-06-20 17:08:32,139 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 247 predicate places. [2024-06-20 17:08:32,139 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 357 transitions, 5091 flow [2024-06-20 17:08:32,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:08:32,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:08:32,140 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:08:32,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-20 17:08:32,140 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)] === [2024-06-20 17:08:32,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:08:32,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1664944824, now seen corresponding path program 6 times [2024-06-20 17:08:32,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:08:32,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622272135] [2024-06-20 17:08:32,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:08:32,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:08:32,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:08:34,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:08:34,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:08:34,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622272135] [2024-06-20 17:08:34,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622272135] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:08:34,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:08:34,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:08:34,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862750724] [2024-06-20 17:08:34,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:08:34,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:08:34,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:08:34,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:08:34,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:08:34,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:08:34,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 357 transitions, 5091 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:08:34,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:08:34,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:08:34,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:08:35,781 INFO L124 PetriNetUnfolderBase]: 2315/3814 cut-off events. [2024-06-20 17:08:35,781 INFO L125 PetriNetUnfolderBase]: For 442342/442366 co-relation queries the response was YES. [2024-06-20 17:08:35,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33539 conditions, 3814 events. 2315/3814 cut-off events. For 442342/442366 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 22586 event pairs, 492 based on Foata normal form. 25/3839 useless extension candidates. Maximal degree in co-relation 33397. Up to 3404 conditions per place. [2024-06-20 17:08:35,823 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 292 selfloop transitions, 82 changer transitions 0/379 dead transitions. [2024-06-20 17:08:35,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 379 transitions, 6121 flow [2024-06-20 17:08:35,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:08:35,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:08:35,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-20 17:08:35,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4013605442176871 [2024-06-20 17:08:35,825 INFO L175 Difference]: Start difference. First operand has 290 places, 357 transitions, 5091 flow. Second operand 7 states and 118 transitions. [2024-06-20 17:08:35,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 379 transitions, 6121 flow [2024-06-20 17:08:36,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 379 transitions, 5987 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-20 17:08:36,783 INFO L231 Difference]: Finished difference. Result has 292 places, 360 transitions, 5185 flow [2024-06-20 17:08:36,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4960, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5185, PETRI_PLACES=292, PETRI_TRANSITIONS=360} [2024-06-20 17:08:36,784 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 249 predicate places. [2024-06-20 17:08:36,784 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 360 transitions, 5185 flow [2024-06-20 17:08:36,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:08:36,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:08:36,784 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:08:36,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-20 17:08:36,784 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:08:36,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:08:36,785 INFO L85 PathProgramCache]: Analyzing trace with hash 941947130, now seen corresponding path program 7 times [2024-06-20 17:08:36,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:08:36,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498461205] [2024-06-20 17:08:36,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:08:36,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:08:36,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:08:39,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:08:39,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:08:39,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498461205] [2024-06-20 17:08:39,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498461205] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:08:39,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:08:39,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:08:39,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613800935] [2024-06-20 17:08:39,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:08:39,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:08:39,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:08:39,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:08:39,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:08:39,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:08:39,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 360 transitions, 5185 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:08:39,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:08:39,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:08:39,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:08:40,892 INFO L124 PetriNetUnfolderBase]: 2312/3808 cut-off events. [2024-06-20 17:08:40,892 INFO L125 PetriNetUnfolderBase]: For 448035/448047 co-relation queries the response was YES. [2024-06-20 17:08:40,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33523 conditions, 3808 events. 2312/3808 cut-off events. For 448035/448047 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 22531 event pairs, 498 based on Foata normal form. 13/3819 useless extension candidates. Maximal degree in co-relation 33379. Up to 3401 conditions per place. [2024-06-20 17:08:40,945 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 287 selfloop transitions, 89 changer transitions 0/381 dead transitions. [2024-06-20 17:08:40,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 381 transitions, 6335 flow [2024-06-20 17:08:40,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:08:40,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:08:40,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-20 17:08:40,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-20 17:08:40,947 INFO L175 Difference]: Start difference. First operand has 292 places, 360 transitions, 5185 flow. Second operand 8 states and 132 transitions. [2024-06-20 17:08:40,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 381 transitions, 6335 flow [2024-06-20 17:08:42,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 381 transitions, 6195 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-20 17:08:42,191 INFO L231 Difference]: Finished difference. Result has 296 places, 360 transitions, 5229 flow [2024-06-20 17:08:42,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5045, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5229, PETRI_PLACES=296, PETRI_TRANSITIONS=360} [2024-06-20 17:08:42,191 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 253 predicate places. [2024-06-20 17:08:42,191 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 360 transitions, 5229 flow [2024-06-20 17:08:42,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:08:42,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:08:42,192 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:08:42,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-20 17:08:42,192 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:08:42,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:08:42,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1421274848, now seen corresponding path program 5 times [2024-06-20 17:08:42,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:08:42,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670329863] [2024-06-20 17:08:42,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:08:42,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:08:42,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:08:45,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:08:45,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:08:45,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670329863] [2024-06-20 17:08:45,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670329863] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:08:45,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:08:45,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:08:45,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402524081] [2024-06-20 17:08:45,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:08:45,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:08:45,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:08:45,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:08:45,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:08:45,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:08:45,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 360 transitions, 5229 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:08:45,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:08:45,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:08:45,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:08:46,372 INFO L124 PetriNetUnfolderBase]: 2317/3810 cut-off events. [2024-06-20 17:08:46,372 INFO L125 PetriNetUnfolderBase]: For 457759/457761 co-relation queries the response was YES. [2024-06-20 17:08:46,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33787 conditions, 3810 events. 2317/3810 cut-off events. For 457759/457761 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 22452 event pairs, 491 based on Foata normal form. 1/3810 useless extension candidates. Maximal degree in co-relation 33642. Up to 3548 conditions per place. [2024-06-20 17:08:46,418 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 342 selfloop transitions, 33 changer transitions 0/380 dead transitions. [2024-06-20 17:08:46,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 380 transitions, 6125 flow [2024-06-20 17:08:46,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:08:46,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:08:46,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-20 17:08:46,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-20 17:08:46,421 INFO L175 Difference]: Start difference. First operand has 296 places, 360 transitions, 5229 flow. Second operand 8 states and 126 transitions. [2024-06-20 17:08:46,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 380 transitions, 6125 flow [2024-06-20 17:08:47,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 380 transitions, 5935 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-20 17:08:47,572 INFO L231 Difference]: Finished difference. Result has 299 places, 363 transitions, 5217 flow [2024-06-20 17:08:47,572 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5039, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5217, PETRI_PLACES=299, PETRI_TRANSITIONS=363} [2024-06-20 17:08:47,572 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 256 predicate places. [2024-06-20 17:08:47,572 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 363 transitions, 5217 flow [2024-06-20 17:08:47,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:08:47,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:08:47,573 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:08:47,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-20 17:08:47,573 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:08:47,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:08:47,573 INFO L85 PathProgramCache]: Analyzing trace with hash 2121277536, now seen corresponding path program 8 times [2024-06-20 17:08:47,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:08:47,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500304295] [2024-06-20 17:08:47,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:08:47,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:08:47,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:08:50,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:08:50,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:08:50,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500304295] [2024-06-20 17:08:50,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500304295] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:08:50,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:08:50,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:08:50,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787259443] [2024-06-20 17:08:50,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:08:50,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:08:50,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:08:50,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:08:50,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:08:50,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:08:50,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 363 transitions, 5217 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:08:50,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:08:50,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:08:50,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:08:52,252 INFO L124 PetriNetUnfolderBase]: 2314/3805 cut-off events. [2024-06-20 17:08:52,252 INFO L125 PetriNetUnfolderBase]: For 466243/466255 co-relation queries the response was YES. [2024-06-20 17:08:52,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33716 conditions, 3805 events. 2314/3805 cut-off events. For 466243/466255 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 22450 event pairs, 492 based on Foata normal form. 13/3816 useless extension candidates. Maximal degree in co-relation 33570. Up to 3405 conditions per place. [2024-06-20 17:08:52,292 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 290 selfloop transitions, 90 changer transitions 0/385 dead transitions. [2024-06-20 17:08:52,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 385 transitions, 6213 flow [2024-06-20 17:08:52,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:08:52,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:08:52,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 155 transitions. [2024-06-20 17:08:52,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36904761904761907 [2024-06-20 17:08:52,294 INFO L175 Difference]: Start difference. First operand has 299 places, 363 transitions, 5217 flow. Second operand 10 states and 155 transitions. [2024-06-20 17:08:52,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 385 transitions, 6213 flow [2024-06-20 17:08:53,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 385 transitions, 6045 flow, removed 53 selfloop flow, removed 6 redundant places. [2024-06-20 17:08:53,489 INFO L231 Difference]: Finished difference. Result has 303 places, 363 transitions, 5235 flow [2024-06-20 17:08:53,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5049, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5235, PETRI_PLACES=303, PETRI_TRANSITIONS=363} [2024-06-20 17:08:53,489 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 260 predicate places. [2024-06-20 17:08:53,489 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 363 transitions, 5235 flow [2024-06-20 17:08:53,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:08:53,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:08:53,490 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:08:53,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-20 17:08:53,490 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:08:53,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:08:53,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1421690930, now seen corresponding path program 7 times [2024-06-20 17:08:53,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:08:53,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454218061] [2024-06-20 17:08:53,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:08:53,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:08:53,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:08:55,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:08:55,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:08:55,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454218061] [2024-06-20 17:08:55,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454218061] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:08:55,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:08:55,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:08:55,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544326088] [2024-06-20 17:08:55,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:08:55,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:08:55,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:08:55,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:08:55,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:08:55,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:08:55,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 363 transitions, 5235 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:08:55,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:08:55,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:08:55,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:08:57,747 INFO L124 PetriNetUnfolderBase]: 2319/3798 cut-off events. [2024-06-20 17:08:57,747 INFO L125 PetriNetUnfolderBase]: For 477306/477312 co-relation queries the response was YES. [2024-06-20 17:08:57,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33970 conditions, 3798 events. 2319/3798 cut-off events. For 477306/477312 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 22320 event pairs, 553 based on Foata normal form. 2/3794 useless extension candidates. Maximal degree in co-relation 33823. Up to 3128 conditions per place. [2024-06-20 17:08:57,785 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 218 selfloop transitions, 162 changer transitions 0/385 dead transitions. [2024-06-20 17:08:57,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 385 transitions, 6476 flow [2024-06-20 17:08:57,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:08:57,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:08:57,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-20 17:08:57,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-20 17:08:57,787 INFO L175 Difference]: Start difference. First operand has 303 places, 363 transitions, 5235 flow. Second operand 8 states and 134 transitions. [2024-06-20 17:08:57,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 385 transitions, 6476 flow [2024-06-20 17:08:58,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 385 transitions, 6220 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-20 17:08:58,904 INFO L231 Difference]: Finished difference. Result has 301 places, 366 transitions, 5392 flow [2024-06-20 17:08:58,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4979, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5392, PETRI_PLACES=301, PETRI_TRANSITIONS=366} [2024-06-20 17:08:58,904 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 258 predicate places. [2024-06-20 17:08:58,905 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 366 transitions, 5392 flow [2024-06-20 17:08:58,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:08:58,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:08:58,905 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:08:58,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-20 17:08:58,905 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:08:58,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:08:58,905 INFO L85 PathProgramCache]: Analyzing trace with hash -1421690558, now seen corresponding path program 6 times [2024-06-20 17:08:58,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:08:58,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972252651] [2024-06-20 17:08:58,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:08:58,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:08:58,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:09:00,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:09:00,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:09:00,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972252651] [2024-06-20 17:09:00,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972252651] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:09:00,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:09:00,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:09:00,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546802184] [2024-06-20 17:09:00,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:09:00,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:09:00,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:09:00,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:09:00,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:09:01,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:09:01,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 366 transitions, 5392 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:09:01,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:09:01,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:09:01,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:09:02,581 INFO L124 PetriNetUnfolderBase]: 2324/3821 cut-off events. [2024-06-20 17:09:02,581 INFO L125 PetriNetUnfolderBase]: For 486894/486906 co-relation queries the response was YES. [2024-06-20 17:09:02,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34420 conditions, 3821 events. 2324/3821 cut-off events. For 486894/486906 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 22586 event pairs, 503 based on Foata normal form. 13/3832 useless extension candidates. Maximal degree in co-relation 34273. Up to 3416 conditions per place. [2024-06-20 17:09:02,620 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 292 selfloop transitions, 92 changer transitions 0/389 dead transitions. [2024-06-20 17:09:02,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 389 transitions, 6502 flow [2024-06-20 17:09:02,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:09:02,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:09:02,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-20 17:09:02,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-20 17:09:02,622 INFO L175 Difference]: Start difference. First operand has 301 places, 366 transitions, 5392 flow. Second operand 8 states and 130 transitions. [2024-06-20 17:09:02,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 389 transitions, 6502 flow [2024-06-20 17:09:04,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 389 transitions, 6178 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-20 17:09:04,036 INFO L231 Difference]: Finished difference. Result has 304 places, 369 transitions, 5370 flow [2024-06-20 17:09:04,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5068, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5370, PETRI_PLACES=304, PETRI_TRANSITIONS=369} [2024-06-20 17:09:04,037 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 261 predicate places. [2024-06-20 17:09:04,037 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 369 transitions, 5370 flow [2024-06-20 17:09:04,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:09:04,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:09:04,038 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:09:04,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-20 17:09:04,038 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:09:04,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:09:04,038 INFO L85 PathProgramCache]: Analyzing trace with hash 285813134, now seen corresponding path program 7 times [2024-06-20 17:09:04,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:09:04,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91741625] [2024-06-20 17:09:04,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:09:04,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:09:04,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:09:07,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:09:07,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:09:07,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91741625] [2024-06-20 17:09:07,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91741625] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:09:07,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:09:07,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:09:07,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443840510] [2024-06-20 17:09:07,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:09:07,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:09:07,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:09:07,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:09:07,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:09:07,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:09:07,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 369 transitions, 5370 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:09:07,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:09:07,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:09:07,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:09:08,333 INFO L124 PetriNetUnfolderBase]: 2382/3911 cut-off events. [2024-06-20 17:09:08,334 INFO L125 PetriNetUnfolderBase]: For 521564/521570 co-relation queries the response was YES. [2024-06-20 17:09:08,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36161 conditions, 3911 events. 2382/3911 cut-off events. For 521564/521570 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 23083 event pairs, 492 based on Foata normal form. 2/3912 useless extension candidates. Maximal degree in co-relation 36013. Up to 3299 conditions per place. [2024-06-20 17:09:08,379 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 270 selfloop transitions, 129 changer transitions 0/404 dead transitions. [2024-06-20 17:09:08,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 404 transitions, 7181 flow [2024-06-20 17:09:08,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:09:08,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:09:08,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-20 17:09:08,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-20 17:09:08,381 INFO L175 Difference]: Start difference. First operand has 304 places, 369 transitions, 5370 flow. Second operand 8 states and 139 transitions. [2024-06-20 17:09:08,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 404 transitions, 7181 flow [2024-06-20 17:09:09,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 404 transitions, 6901 flow, removed 50 selfloop flow, removed 6 redundant places. [2024-06-20 17:09:09,688 INFO L231 Difference]: Finished difference. Result has 308 places, 383 transitions, 5808 flow [2024-06-20 17:09:09,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5090, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5808, PETRI_PLACES=308, PETRI_TRANSITIONS=383} [2024-06-20 17:09:09,689 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 265 predicate places. [2024-06-20 17:09:09,689 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 383 transitions, 5808 flow [2024-06-20 17:09:09,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:09:09,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:09:09,689 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:09:09,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-20 17:09:09,689 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:09:09,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:09:09,690 INFO L85 PathProgramCache]: Analyzing trace with hash 285605744, now seen corresponding path program 8 times [2024-06-20 17:09:09,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:09:09,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541516393] [2024-06-20 17:09:09,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:09:09,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:09:09,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:09:12,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:09:12,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:09:12,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541516393] [2024-06-20 17:09:12,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541516393] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:09:12,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:09:12,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:09:12,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237271772] [2024-06-20 17:09:12,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:09:12,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:09:12,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:09:12,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:09:12,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:09:12,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:09:12,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 383 transitions, 5808 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:09:12,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:09:12,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:09:12,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:09:14,008 INFO L124 PetriNetUnfolderBase]: 2395/3929 cut-off events. [2024-06-20 17:09:14,009 INFO L125 PetriNetUnfolderBase]: For 541520/541526 co-relation queries the response was YES. [2024-06-20 17:09:14,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37441 conditions, 3929 events. 2395/3929 cut-off events. For 541520/541526 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 23204 event pairs, 485 based on Foata normal form. 2/3930 useless extension candidates. Maximal degree in co-relation 37290. Up to 3294 conditions per place. [2024-06-20 17:09:14,051 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 278 selfloop transitions, 130 changer transitions 0/413 dead transitions. [2024-06-20 17:09:14,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 413 transitions, 7548 flow [2024-06-20 17:09:14,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:09:14,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:09:14,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-20 17:09:14,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-20 17:09:14,053 INFO L175 Difference]: Start difference. First operand has 308 places, 383 transitions, 5808 flow. Second operand 8 states and 139 transitions. [2024-06-20 17:09:14,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 413 transitions, 7548 flow [2024-06-20 17:09:15,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 413 transitions, 7270 flow, removed 88 selfloop flow, removed 3 redundant places. [2024-06-20 17:09:15,365 INFO L231 Difference]: Finished difference. Result has 314 places, 391 transitions, 6029 flow [2024-06-20 17:09:15,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5544, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6029, PETRI_PLACES=314, PETRI_TRANSITIONS=391} [2024-06-20 17:09:15,366 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 271 predicate places. [2024-06-20 17:09:15,366 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 391 transitions, 6029 flow [2024-06-20 17:09:15,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:09:15,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:09:15,367 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:09:15,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-20 17:09:15,367 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:09:15,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:09:15,367 INFO L85 PathProgramCache]: Analyzing trace with hash 1570128862, now seen corresponding path program 9 times [2024-06-20 17:09:15,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:09:15,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52195803] [2024-06-20 17:09:15,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:09:15,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:09:15,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:09:18,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:09:18,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:09:18,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52195803] [2024-06-20 17:09:18,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52195803] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:09:18,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:09:18,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:09:18,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153201843] [2024-06-20 17:09:18,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:09:18,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:09:18,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:09:18,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:09:18,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:09:18,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:09:18,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 391 transitions, 6029 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:09:18,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:09:18,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:09:18,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:09:19,918 INFO L124 PetriNetUnfolderBase]: 2389/3913 cut-off events. [2024-06-20 17:09:19,919 INFO L125 PetriNetUnfolderBase]: For 548234/548236 co-relation queries the response was YES. [2024-06-20 17:09:19,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37220 conditions, 3913 events. 2389/3913 cut-off events. For 548234/548236 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 23072 event pairs, 466 based on Foata normal form. 2/3915 useless extension candidates. Maximal degree in co-relation 37066. Up to 3333 conditions per place. [2024-06-20 17:09:19,961 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 300 selfloop transitions, 118 changer transitions 0/423 dead transitions. [2024-06-20 17:09:19,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 423 transitions, 7377 flow [2024-06-20 17:09:19,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:09:19,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:09:19,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-20 17:09:19,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-20 17:09:19,963 INFO L175 Difference]: Start difference. First operand has 314 places, 391 transitions, 6029 flow. Second operand 9 states and 161 transitions. [2024-06-20 17:09:19,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 423 transitions, 7377 flow [2024-06-20 17:09:21,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 423 transitions, 7000 flow, removed 110 selfloop flow, removed 4 redundant places. [2024-06-20 17:09:21,332 INFO L231 Difference]: Finished difference. Result has 319 places, 391 transitions, 5900 flow [2024-06-20 17:09:21,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5652, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5900, PETRI_PLACES=319, PETRI_TRANSITIONS=391} [2024-06-20 17:09:21,332 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 276 predicate places. [2024-06-20 17:09:21,332 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 391 transitions, 5900 flow [2024-06-20 17:09:21,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:09:21,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:09:21,333 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:09:21,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-20 17:09:21,333 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:09:21,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:09:21,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1689427216, now seen corresponding path program 9 times [2024-06-20 17:09:21,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:09:21,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620391795] [2024-06-20 17:09:21,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:09:21,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:09:21,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:09:23,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:09:23,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:09:23,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620391795] [2024-06-20 17:09:23,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620391795] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:09:23,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:09:23,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:09:23,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335063370] [2024-06-20 17:09:23,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:09:23,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:09:23,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:09:23,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:09:23,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:09:23,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:09:23,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 391 transitions, 5900 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:09:23,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:09:23,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:09:23,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:09:24,932 INFO L124 PetriNetUnfolderBase]: 2386/3907 cut-off events. [2024-06-20 17:09:24,932 INFO L125 PetriNetUnfolderBase]: For 550694/550700 co-relation queries the response was YES. [2024-06-20 17:09:24,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37231 conditions, 3907 events. 2386/3907 cut-off events. For 550694/550700 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 22967 event pairs, 483 based on Foata normal form. 2/3908 useless extension candidates. Maximal degree in co-relation 37075. Up to 3418 conditions per place. [2024-06-20 17:09:24,982 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 310 selfloop transitions, 101 changer transitions 0/416 dead transitions. [2024-06-20 17:09:24,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 416 transitions, 6976 flow [2024-06-20 17:09:24,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:09:24,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:09:24,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-20 17:09:24,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4421768707482993 [2024-06-20 17:09:24,984 INFO L175 Difference]: Start difference. First operand has 319 places, 391 transitions, 5900 flow. Second operand 7 states and 130 transitions. [2024-06-20 17:09:24,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 416 transitions, 6976 flow [2024-06-20 17:09:26,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 416 transitions, 6686 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-20 17:09:26,484 INFO L231 Difference]: Finished difference. Result has 317 places, 391 transitions, 5822 flow [2024-06-20 17:09:26,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5610, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5822, PETRI_PLACES=317, PETRI_TRANSITIONS=391} [2024-06-20 17:09:26,485 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 274 predicate places. [2024-06-20 17:09:26,485 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 391 transitions, 5822 flow [2024-06-20 17:09:26,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:09:26,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:09:26,485 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:09:26,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-20 17:09:26,486 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:09:26,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:09:26,486 INFO L85 PathProgramCache]: Analyzing trace with hash 279557024, now seen corresponding path program 10 times [2024-06-20 17:09:26,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:09:26,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913604241] [2024-06-20 17:09:26,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:09:26,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:09:26,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:09:29,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:09:29,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:09:29,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913604241] [2024-06-20 17:09:29,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913604241] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:09:29,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:09:29,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:09:29,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739277263] [2024-06-20 17:09:29,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:09:29,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:09:29,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:09:29,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:09:29,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:09:29,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:09:29,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 391 transitions, 5822 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:09:29,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:09:29,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:09:29,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:09:30,414 INFO L124 PetriNetUnfolderBase]: 2383/3911 cut-off events. [2024-06-20 17:09:30,415 INFO L125 PetriNetUnfolderBase]: For 556746/556748 co-relation queries the response was YES. [2024-06-20 17:09:30,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37072 conditions, 3911 events. 2383/3911 cut-off events. For 556746/556748 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 23107 event pairs, 475 based on Foata normal form. 1/3912 useless extension candidates. Maximal degree in co-relation 36916. Up to 3649 conditions per place. [2024-06-20 17:09:30,464 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 385 selfloop transitions, 25 changer transitions 0/415 dead transitions. [2024-06-20 17:09:30,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 415 transitions, 6814 flow [2024-06-20 17:09:30,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:09:30,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:09:30,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-20 17:09:30,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-20 17:09:30,465 INFO L175 Difference]: Start difference. First operand has 317 places, 391 transitions, 5822 flow. Second operand 8 states and 130 transitions. [2024-06-20 17:09:30,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 415 transitions, 6814 flow [2024-06-20 17:09:32,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 415 transitions, 6550 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-20 17:09:32,009 INFO L231 Difference]: Finished difference. Result has 317 places, 394 transitions, 5734 flow [2024-06-20 17:09:32,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5558, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5734, PETRI_PLACES=317, PETRI_TRANSITIONS=394} [2024-06-20 17:09:32,009 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 274 predicate places. [2024-06-20 17:09:32,009 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 394 transitions, 5734 flow [2024-06-20 17:09:32,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:09:32,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:09:32,010 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:09:32,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-20 17:09:32,010 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:09:32,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:09:32,010 INFO L85 PathProgramCache]: Analyzing trace with hash 892311224, now seen corresponding path program 11 times [2024-06-20 17:09:32,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:09:32,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375598725] [2024-06-20 17:09:32,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:09:32,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:09:32,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:09:34,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:09:34,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:09:34,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375598725] [2024-06-20 17:09:34,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375598725] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:09:34,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:09:34,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:09:34,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024563810] [2024-06-20 17:09:34,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:09:34,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:09:34,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:09:34,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:09:34,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:09:34,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:09:34,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 394 transitions, 5734 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:09:34,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:09:34,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:09:34,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:09:35,932 INFO L124 PetriNetUnfolderBase]: 2388/3916 cut-off events. [2024-06-20 17:09:35,932 INFO L125 PetriNetUnfolderBase]: For 557378/557384 co-relation queries the response was YES. [2024-06-20 17:09:35,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36978 conditions, 3916 events. 2388/3916 cut-off events. For 557378/557384 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 23105 event pairs, 483 based on Foata normal form. 2/3917 useless extension candidates. Maximal degree in co-relation 36822. Up to 3418 conditions per place. [2024-06-20 17:09:35,982 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 314 selfloop transitions, 104 changer transitions 0/423 dead transitions. [2024-06-20 17:09:35,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 423 transitions, 6946 flow [2024-06-20 17:09:35,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:09:35,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:09:35,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-20 17:09:35,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-20 17:09:35,983 INFO L175 Difference]: Start difference. First operand has 317 places, 394 transitions, 5734 flow. Second operand 8 states and 142 transitions. [2024-06-20 17:09:35,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 423 transitions, 6946 flow [2024-06-20 17:09:37,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 423 transitions, 6798 flow, removed 51 selfloop flow, removed 6 redundant places. [2024-06-20 17:09:37,358 INFO L231 Difference]: Finished difference. Result has 319 places, 397 transitions, 5924 flow [2024-06-20 17:09:37,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5586, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5924, PETRI_PLACES=319, PETRI_TRANSITIONS=397} [2024-06-20 17:09:37,359 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 276 predicate places. [2024-06-20 17:09:37,359 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 397 transitions, 5924 flow [2024-06-20 17:09:37,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:09:37,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:09:37,359 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:09:37,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-20 17:09:37,360 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:09:37,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:09:37,360 INFO L85 PathProgramCache]: Analyzing trace with hash 715179332, now seen corresponding path program 8 times [2024-06-20 17:09:37,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:09:37,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084936209] [2024-06-20 17:09:37,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:09:37,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:09:37,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:09:39,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:09:39,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:09:39,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084936209] [2024-06-20 17:09:39,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084936209] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:09:39,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:09:39,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:09:39,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223652360] [2024-06-20 17:09:39,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:09:39,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:09:39,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:09:39,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:09:39,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:09:39,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:09:39,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 397 transitions, 5924 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:09:39,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:09:39,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:09:39,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:09:41,774 INFO L124 PetriNetUnfolderBase]: 2393/3921 cut-off events. [2024-06-20 17:09:41,774 INFO L125 PetriNetUnfolderBase]: For 569675/569677 co-relation queries the response was YES. [2024-06-20 17:09:41,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37414 conditions, 3921 events. 2393/3921 cut-off events. For 569675/569677 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 23074 event pairs, 465 based on Foata normal form. 1/3922 useless extension candidates. Maximal degree in co-relation 37257. Up to 3334 conditions per place. [2024-06-20 17:09:41,814 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 308 selfloop transitions, 125 changer transitions 0/438 dead transitions. [2024-06-20 17:09:41,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 438 transitions, 7153 flow [2024-06-20 17:09:41,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:09:41,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:09:41,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-20 17:09:41,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4417989417989418 [2024-06-20 17:09:41,815 INFO L175 Difference]: Start difference. First operand has 319 places, 397 transitions, 5924 flow. Second operand 9 states and 167 transitions. [2024-06-20 17:09:41,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 438 transitions, 7153 flow [2024-06-20 17:09:43,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 438 transitions, 6795 flow, removed 77 selfloop flow, removed 6 redundant places. [2024-06-20 17:09:43,845 INFO L231 Difference]: Finished difference. Result has 323 places, 400 transitions, 5969 flow [2024-06-20 17:09:43,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5566, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5969, PETRI_PLACES=323, PETRI_TRANSITIONS=400} [2024-06-20 17:09:43,846 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 280 predicate places. [2024-06-20 17:09:43,846 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 400 transitions, 5969 flow [2024-06-20 17:09:43,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:09:43,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:09:43,847 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:09:43,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-20 17:09:43,847 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:09:43,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:09:43,847 INFO L85 PathProgramCache]: Analyzing trace with hash 279141128, now seen corresponding path program 10 times [2024-06-20 17:09:43,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:09:43,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89932179] [2024-06-20 17:09:43,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:09:43,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:09:43,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:09:46,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:09:46,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:09:46,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89932179] [2024-06-20 17:09:46,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89932179] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:09:46,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:09:46,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:09:46,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545503528] [2024-06-20 17:09:46,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:09:46,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:09:46,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:09:46,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:09:46,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:09:46,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:09:46,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 400 transitions, 5969 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:09:46,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:09:46,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:09:46,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:09:47,897 INFO L124 PetriNetUnfolderBase]: 2390/3919 cut-off events. [2024-06-20 17:09:47,897 INFO L125 PetriNetUnfolderBase]: For 575076/575078 co-relation queries the response was YES. [2024-06-20 17:09:47,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37536 conditions, 3919 events. 2390/3919 cut-off events. For 575076/575078 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 23147 event pairs, 465 based on Foata normal form. 1/3920 useless extension candidates. Maximal degree in co-relation 37377. Up to 3425 conditions per place. [2024-06-20 17:09:47,944 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 324 selfloop transitions, 103 changer transitions 0/432 dead transitions. [2024-06-20 17:09:47,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 432 transitions, 6913 flow [2024-06-20 17:09:47,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:09:47,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:09:47,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-20 17:09:47,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-20 17:09:47,946 INFO L175 Difference]: Start difference. First operand has 323 places, 400 transitions, 5969 flow. Second operand 8 states and 149 transitions. [2024-06-20 17:09:47,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 432 transitions, 6913 flow [2024-06-20 17:09:49,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 432 transitions, 6657 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-20 17:09:49,834 INFO L231 Difference]: Finished difference. Result has 323 places, 400 transitions, 5955 flow [2024-06-20 17:09:49,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5713, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5955, PETRI_PLACES=323, PETRI_TRANSITIONS=400} [2024-06-20 17:09:49,835 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 280 predicate places. [2024-06-20 17:09:49,835 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 400 transitions, 5955 flow [2024-06-20 17:09:49,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:09:49,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:09:49,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:09:49,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-20 17:09:49,836 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:09:49,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:09:49,837 INFO L85 PathProgramCache]: Analyzing trace with hash 892310852, now seen corresponding path program 9 times [2024-06-20 17:09:49,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:09:49,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184940622] [2024-06-20 17:09:49,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:09:49,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:09:49,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:09:52,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:09:52,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:09:52,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184940622] [2024-06-20 17:09:52,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184940622] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:09:52,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:09:52,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:09:52,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288514427] [2024-06-20 17:09:52,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:09:52,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:09:52,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:09:52,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:09:52,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:09:52,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:09:52,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 400 transitions, 5955 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:09:52,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:09:52,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:09:52,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:09:53,805 INFO L124 PetriNetUnfolderBase]: 2387/3919 cut-off events. [2024-06-20 17:09:53,805 INFO L125 PetriNetUnfolderBase]: For 566579/566585 co-relation queries the response was YES. [2024-06-20 17:09:53,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37371 conditions, 3919 events. 2387/3919 cut-off events. For 566579/566585 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 23158 event pairs, 485 based on Foata normal form. 2/3920 useless extension candidates. Maximal degree in co-relation 37211. Up to 3330 conditions per place. [2024-06-20 17:09:53,863 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 299 selfloop transitions, 126 changer transitions 0/430 dead transitions. [2024-06-20 17:09:53,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 430 transitions, 7079 flow [2024-06-20 17:09:53,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:09:53,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:09:53,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-20 17:09:53,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-20 17:09:53,867 INFO L175 Difference]: Start difference. First operand has 323 places, 400 transitions, 5955 flow. Second operand 8 states and 147 transitions. [2024-06-20 17:09:53,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 430 transitions, 7079 flow [2024-06-20 17:09:55,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 430 transitions, 6712 flow, removed 35 selfloop flow, removed 11 redundant places. [2024-06-20 17:09:55,903 INFO L231 Difference]: Finished difference. Result has 320 places, 400 transitions, 5856 flow [2024-06-20 17:09:55,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5594, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5856, PETRI_PLACES=320, PETRI_TRANSITIONS=400} [2024-06-20 17:09:55,904 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 277 predicate places. [2024-06-20 17:09:55,904 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 400 transitions, 5856 flow [2024-06-20 17:09:55,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:09:55,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:09:55,904 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] [2024-06-20 17:09:55,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-20 17:09:55,904 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:09:55,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:09:55,905 INFO L85 PathProgramCache]: Analyzing trace with hash 38166690, now seen corresponding path program 12 times [2024-06-20 17:09:55,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:09:55,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868914140] [2024-06-20 17:09:55,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:09:55,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:09:55,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:09:58,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:09:58,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:09:58,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868914140] [2024-06-20 17:09:58,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868914140] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:09:58,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:09:58,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:09:58,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418574141] [2024-06-20 17:09:58,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:09:58,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:09:58,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:09:58,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:09:58,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:09:58,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:09:58,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 400 transitions, 5856 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:09:58,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:09:58,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:09:58,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:09:59,699 INFO L124 PetriNetUnfolderBase]: 2381/3909 cut-off events. [2024-06-20 17:09:59,699 INFO L125 PetriNetUnfolderBase]: For 542218/542220 co-relation queries the response was YES. [2024-06-20 17:09:59,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36725 conditions, 3909 events. 2381/3909 cut-off events. For 542218/542220 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 23114 event pairs, 465 based on Foata normal form. 2/3911 useless extension candidates. Maximal degree in co-relation 36567. Up to 3399 conditions per place. [2024-06-20 17:09:59,749 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 323 selfloop transitions, 109 changer transitions 0/437 dead transitions. [2024-06-20 17:09:59,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 437 transitions, 6958 flow [2024-06-20 17:09:59,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:09:59,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:09:59,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-20 17:09:59,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-20 17:09:59,761 INFO L175 Difference]: Start difference. First operand has 320 places, 400 transitions, 5856 flow. Second operand 9 states and 162 transitions. [2024-06-20 17:09:59,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 437 transitions, 6958 flow [2024-06-20 17:10:01,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 437 transitions, 6686 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-20 17:10:01,535 INFO L231 Difference]: Finished difference. Result has 321 places, 404 transitions, 5971 flow [2024-06-20 17:10:01,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5584, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5971, PETRI_PLACES=321, PETRI_TRANSITIONS=404} [2024-06-20 17:10:01,542 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 278 predicate places. [2024-06-20 17:10:01,542 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 404 transitions, 5971 flow [2024-06-20 17:10:01,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:10:01,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:10:01,543 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] [2024-06-20 17:10:01,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-20 17:10:01,543 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:10:01,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:10:01,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1114923092, now seen corresponding path program 2 times [2024-06-20 17:10:01,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:10:01,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124318387] [2024-06-20 17:10:01,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:10:01,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:10:01,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:10:05,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:10:05,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:10:05,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124318387] [2024-06-20 17:10:05,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124318387] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:10:05,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:10:05,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:10:05,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557929130] [2024-06-20 17:10:05,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:10:05,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:10:05,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:10:05,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:10:05,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:10:05,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 17:10:05,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 404 transitions, 5971 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:10:05,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:10:05,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 17:10:05,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:10:06,225 INFO L124 PetriNetUnfolderBase]: 2298/3791 cut-off events. [2024-06-20 17:10:06,225 INFO L125 PetriNetUnfolderBase]: For 596613/596627 co-relation queries the response was YES. [2024-06-20 17:10:06,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36490 conditions, 3791 events. 2298/3791 cut-off events. For 596613/596627 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 22614 event pairs, 455 based on Foata normal form. 25/3785 useless extension candidates. Maximal degree in co-relation 36331. Up to 3293 conditions per place. [2024-06-20 17:10:06,271 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 320 selfloop transitions, 55 changer transitions 0/423 dead transitions. [2024-06-20 17:10:06,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 423 transitions, 6857 flow [2024-06-20 17:10:06,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:10:06,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:10:06,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-20 17:10:06,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-20 17:10:06,273 INFO L175 Difference]: Start difference. First operand has 321 places, 404 transitions, 5971 flow. Second operand 8 states and 132 transitions. [2024-06-20 17:10:06,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 423 transitions, 6857 flow [2024-06-20 17:10:07,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 423 transitions, 6540 flow, removed 56 selfloop flow, removed 7 redundant places. [2024-06-20 17:10:07,849 INFO L231 Difference]: Finished difference. Result has 322 places, 405 transitions, 5800 flow [2024-06-20 17:10:07,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5654, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5800, PETRI_PLACES=322, PETRI_TRANSITIONS=405} [2024-06-20 17:10:07,851 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 279 predicate places. [2024-06-20 17:10:07,851 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 405 transitions, 5800 flow [2024-06-20 17:10:07,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:10:07,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:10:07,851 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:10:07,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-20 17:10:07,852 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:10:07,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:10:07,852 INFO L85 PathProgramCache]: Analyzing trace with hash 715425782, now seen corresponding path program 3 times [2024-06-20 17:10:07,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:10:07,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758880039] [2024-06-20 17:10:07,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:10:07,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:10:07,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:10:10,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:10:10,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:10:10,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758880039] [2024-06-20 17:10:10,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758880039] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:10:10,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:10:10,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:10:10,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168253913] [2024-06-20 17:10:10,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:10:10,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:10:10,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:10:10,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:10:10,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:10:10,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 17:10:10,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 405 transitions, 5800 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:10:10,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:10:10,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 17:10:10,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:10:12,143 INFO L124 PetriNetUnfolderBase]: 2317/3850 cut-off events. [2024-06-20 17:10:12,143 INFO L125 PetriNetUnfolderBase]: For 601719/601738 co-relation queries the response was YES. [2024-06-20 17:10:12,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36721 conditions, 3850 events. 2317/3850 cut-off events. For 601719/601738 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 23179 event pairs, 453 based on Foata normal form. 19/3843 useless extension candidates. Maximal degree in co-relation 36561. Up to 3276 conditions per place. [2024-06-20 17:10:12,187 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 330 selfloop transitions, 55 changer transitions 0/433 dead transitions. [2024-06-20 17:10:12,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 433 transitions, 6892 flow [2024-06-20 17:10:12,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:10:12,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:10:12,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-20 17:10:12,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4021164021164021 [2024-06-20 17:10:12,189 INFO L175 Difference]: Start difference. First operand has 322 places, 405 transitions, 5800 flow. Second operand 9 states and 152 transitions. [2024-06-20 17:10:12,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 433 transitions, 6892 flow [2024-06-20 17:10:14,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 433 transitions, 6778 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-20 17:10:14,080 INFO L231 Difference]: Finished difference. Result has 325 places, 406 transitions, 5836 flow [2024-06-20 17:10:14,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5686, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5836, PETRI_PLACES=325, PETRI_TRANSITIONS=406} [2024-06-20 17:10:14,080 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 282 predicate places. [2024-06-20 17:10:14,080 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 406 transitions, 5836 flow [2024-06-20 17:10:14,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:10:14,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:10:14,081 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:10:14,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-20 17:10:14,081 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:10:14,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:10:14,081 INFO L85 PathProgramCache]: Analyzing trace with hash 1129207892, now seen corresponding path program 4 times [2024-06-20 17:10:14,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:10:14,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430479259] [2024-06-20 17:10:14,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:10:14,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:10:14,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:10:18,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:10:18,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:10:18,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430479259] [2024-06-20 17:10:18,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430479259] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:10:18,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:10:18,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:10:18,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911458688] [2024-06-20 17:10:18,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:10:18,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:10:18,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:10:18,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:10:18,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:10:18,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 17:10:18,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 406 transitions, 5836 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:10:18,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:10:18,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 17:10:18,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:10:19,721 INFO L124 PetriNetUnfolderBase]: 2375/3938 cut-off events. [2024-06-20 17:10:19,721 INFO L125 PetriNetUnfolderBase]: For 635344/635391 co-relation queries the response was YES. [2024-06-20 17:10:19,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38178 conditions, 3938 events. 2375/3938 cut-off events. For 635344/635391 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 23760 event pairs, 471 based on Foata normal form. 21/3931 useless extension candidates. Maximal degree in co-relation 38017. Up to 3398 conditions per place. [2024-06-20 17:10:19,775 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 356 selfloop transitions, 26 changer transitions 0/430 dead transitions. [2024-06-20 17:10:19,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 430 transitions, 6994 flow [2024-06-20 17:10:19,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:10:19,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:10:19,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-20 17:10:19,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-20 17:10:19,776 INFO L175 Difference]: Start difference. First operand has 325 places, 406 transitions, 5836 flow. Second operand 8 states and 135 transitions. [2024-06-20 17:10:19,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 430 transitions, 6994 flow [2024-06-20 17:10:21,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 430 transitions, 6868 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-20 17:10:21,856 INFO L231 Difference]: Finished difference. Result has 326 places, 408 transitions, 5834 flow [2024-06-20 17:10:21,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5716, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5834, PETRI_PLACES=326, PETRI_TRANSITIONS=408} [2024-06-20 17:10:21,857 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 283 predicate places. [2024-06-20 17:10:21,857 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 408 transitions, 5834 flow [2024-06-20 17:10:21,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:10:21,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:10:21,857 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:10:21,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-20 17:10:21,858 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:10:21,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:10:21,858 INFO L85 PathProgramCache]: Analyzing trace with hash 727447892, now seen corresponding path program 5 times [2024-06-20 17:10:21,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:10:21,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374366216] [2024-06-20 17:10:21,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:10:21,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:10:21,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:10:24,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:10:24,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:10:24,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374366216] [2024-06-20 17:10:24,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374366216] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:10:24,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:10:24,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:10:24,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290372915] [2024-06-20 17:10:24,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:10:24,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:10:24,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:10:24,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:10:24,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:10:24,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 17:10:24,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 408 transitions, 5834 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:10:24,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:10:24,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 17:10:24,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:10:25,867 INFO L124 PetriNetUnfolderBase]: 2354/3893 cut-off events. [2024-06-20 17:10:25,868 INFO L125 PetriNetUnfolderBase]: For 598067/598117 co-relation queries the response was YES. [2024-06-20 17:10:25,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36695 conditions, 3893 events. 2354/3893 cut-off events. For 598067/598117 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 23405 event pairs, 467 based on Foata normal form. 25/3887 useless extension candidates. Maximal degree in co-relation 36533. Up to 3390 conditions per place. [2024-06-20 17:10:25,915 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 318 selfloop transitions, 59 changer transitions 0/425 dead transitions. [2024-06-20 17:10:25,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 425 transitions, 6664 flow [2024-06-20 17:10:25,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:10:25,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:10:25,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-20 17:10:25,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-20 17:10:25,917 INFO L175 Difference]: Start difference. First operand has 326 places, 408 transitions, 5834 flow. Second operand 8 states and 132 transitions. [2024-06-20 17:10:25,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 425 transitions, 6664 flow [2024-06-20 17:10:28,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 425 transitions, 6617 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-20 17:10:28,178 INFO L231 Difference]: Finished difference. Result has 330 places, 408 transitions, 5910 flow [2024-06-20 17:10:28,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5787, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5910, PETRI_PLACES=330, PETRI_TRANSITIONS=408} [2024-06-20 17:10:28,178 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 287 predicate places. [2024-06-20 17:10:28,178 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 408 transitions, 5910 flow [2024-06-20 17:10:28,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:10:28,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:10:28,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:10:28,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-20 17:10:28,179 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:10:28,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:10:28,179 INFO L85 PathProgramCache]: Analyzing trace with hash 44229076, now seen corresponding path program 1 times [2024-06-20 17:10:28,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:10:28,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455495989] [2024-06-20 17:10:28,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:10:28,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:10:28,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:10:29,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:10:29,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:10:29,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455495989] [2024-06-20 17:10:29,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455495989] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:10:29,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:10:29,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:10:29,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747307470] [2024-06-20 17:10:29,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:10:29,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:10:29,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:10:29,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:10:29,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:10:29,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:10:29,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 408 transitions, 5910 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:10:29,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:10:29,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:10:29,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:10:31,231 INFO L124 PetriNetUnfolderBase]: 2507/4106 cut-off events. [2024-06-20 17:10:31,232 INFO L125 PetriNetUnfolderBase]: For 579533/579539 co-relation queries the response was YES. [2024-06-20 17:10:31,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38141 conditions, 4106 events. 2507/4106 cut-off events. For 579533/579539 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 24465 event pairs, 464 based on Foata normal form. 6/4112 useless extension candidates. Maximal degree in co-relation 37977. Up to 3799 conditions per place. [2024-06-20 17:10:31,281 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 400 selfloop transitions, 30 changer transitions 0/435 dead transitions. [2024-06-20 17:10:31,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 435 transitions, 7114 flow [2024-06-20 17:10:31,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:10:31,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:10:31,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-20 17:10:31,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40816326530612246 [2024-06-20 17:10:31,283 INFO L175 Difference]: Start difference. First operand has 330 places, 408 transitions, 5910 flow. Second operand 7 states and 120 transitions. [2024-06-20 17:10:31,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 435 transitions, 7114 flow [2024-06-20 17:10:32,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 435 transitions, 6981 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-20 17:10:32,710 INFO L231 Difference]: Finished difference. Result has 330 places, 412 transitions, 5934 flow [2024-06-20 17:10:32,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5777, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5934, PETRI_PLACES=330, PETRI_TRANSITIONS=412} [2024-06-20 17:10:32,711 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 287 predicate places. [2024-06-20 17:10:32,711 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 412 transitions, 5934 flow [2024-06-20 17:10:32,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:10:32,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:10:32,712 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:10:32,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-20 17:10:32,712 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:10:32,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:10:32,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1192784538, now seen corresponding path program 2 times [2024-06-20 17:10:32,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:10:32,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470536556] [2024-06-20 17:10:32,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:10:32,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:10:32,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:10:34,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:10:34,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:10:34,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470536556] [2024-06-20 17:10:34,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470536556] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:10:34,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:10:34,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:10:34,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448330672] [2024-06-20 17:10:34,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:10:34,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:10:34,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:10:34,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:10:34,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:10:34,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:10:34,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 412 transitions, 5934 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:10:34,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:10:34,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:10:34,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:10:35,790 INFO L124 PetriNetUnfolderBase]: 2515/4128 cut-off events. [2024-06-20 17:10:35,790 INFO L125 PetriNetUnfolderBase]: For 589454/589460 co-relation queries the response was YES. [2024-06-20 17:10:35,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38275 conditions, 4128 events. 2515/4128 cut-off events. For 589454/589460 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 24713 event pairs, 502 based on Foata normal form. 6/4134 useless extension candidates. Maximal degree in co-relation 38110. Up to 3848 conditions per place. [2024-06-20 17:10:35,840 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 399 selfloop transitions, 27 changer transitions 0/431 dead transitions. [2024-06-20 17:10:35,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 431 transitions, 6880 flow [2024-06-20 17:10:35,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:10:35,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:10:35,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-20 17:10:35,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3877551020408163 [2024-06-20 17:10:35,842 INFO L175 Difference]: Start difference. First operand has 330 places, 412 transitions, 5934 flow. Second operand 7 states and 114 transitions. [2024-06-20 17:10:35,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 431 transitions, 6880 flow [2024-06-20 17:10:37,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 431 transitions, 6776 flow, removed 38 selfloop flow, removed 3 redundant places. [2024-06-20 17:10:37,670 INFO L231 Difference]: Finished difference. Result has 334 places, 414 transitions, 5941 flow [2024-06-20 17:10:37,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5848, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=385, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5941, PETRI_PLACES=334, PETRI_TRANSITIONS=414} [2024-06-20 17:10:37,670 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 291 predicate places. [2024-06-20 17:10:37,670 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 414 transitions, 5941 flow [2024-06-20 17:10:37,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:10:37,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:10:37,671 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:10:37,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-20 17:10:37,671 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:10:37,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:10:37,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1192789498, now seen corresponding path program 1 times [2024-06-20 17:10:37,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:10:37,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640852082] [2024-06-20 17:10:37,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:10:37,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:10:37,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:10:39,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:10:39,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:10:39,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640852082] [2024-06-20 17:10:39,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640852082] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:10:39,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:10:39,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:10:39,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270659518] [2024-06-20 17:10:39,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:10:39,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:10:39,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:10:39,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:10:39,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:10:39,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:10:39,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 414 transitions, 5941 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:10:39,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:10:39,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:10:39,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:10:41,049 INFO L124 PetriNetUnfolderBase]: 2520/4129 cut-off events. [2024-06-20 17:10:41,049 INFO L125 PetriNetUnfolderBase]: For 595400/595406 co-relation queries the response was YES. [2024-06-20 17:10:41,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38367 conditions, 4129 events. 2520/4129 cut-off events. For 595400/595406 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 24663 event pairs, 501 based on Foata normal form. 5/4134 useless extension candidates. Maximal degree in co-relation 38200. Up to 3855 conditions per place. [2024-06-20 17:10:41,101 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 398 selfloop transitions, 31 changer transitions 0/434 dead transitions. [2024-06-20 17:10:41,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 434 transitions, 6905 flow [2024-06-20 17:10:41,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:10:41,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:10:41,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-20 17:10:41,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-20 17:10:41,103 INFO L175 Difference]: Start difference. First operand has 334 places, 414 transitions, 5941 flow. Second operand 8 states and 126 transitions. [2024-06-20 17:10:41,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 434 transitions, 6905 flow [2024-06-20 17:10:42,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 434 transitions, 6832 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-20 17:10:42,751 INFO L231 Difference]: Finished difference. Result has 337 places, 417 transitions, 6002 flow [2024-06-20 17:10:42,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5868, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6002, PETRI_PLACES=337, PETRI_TRANSITIONS=417} [2024-06-20 17:10:42,751 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 294 predicate places. [2024-06-20 17:10:42,751 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 417 transitions, 6002 flow [2024-06-20 17:10:42,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:10:42,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:10:42,752 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:10:42,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-20 17:10:42,752 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:10:42,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:10:42,752 INFO L85 PathProgramCache]: Analyzing trace with hash 941956058, now seen corresponding path program 3 times [2024-06-20 17:10:42,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:10:42,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742450331] [2024-06-20 17:10:42,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:10:42,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:10:42,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:10:44,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:10:44,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:10:44,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742450331] [2024-06-20 17:10:44,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742450331] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:10:44,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:10:44,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:10:44,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663227877] [2024-06-20 17:10:44,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:10:44,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:10:44,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:10:44,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:10:44,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:10:44,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:10:44,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 417 transitions, 6002 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:10:44,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:10:44,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:10:44,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:10:46,390 INFO L124 PetriNetUnfolderBase]: 2528/4138 cut-off events. [2024-06-20 17:10:46,390 INFO L125 PetriNetUnfolderBase]: For 610972/610974 co-relation queries the response was YES. [2024-06-20 17:10:46,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38812 conditions, 4138 events. 2528/4138 cut-off events. For 610972/610974 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 24665 event pairs, 501 based on Foata normal form. 2/4139 useless extension candidates. Maximal degree in co-relation 38644. Up to 3867 conditions per place. [2024-06-20 17:10:46,442 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 403 selfloop transitions, 29 changer transitions 0/437 dead transitions. [2024-06-20 17:10:46,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 437 transitions, 6948 flow [2024-06-20 17:10:46,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:10:46,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:10:46,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-20 17:10:46,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-20 17:10:46,444 INFO L175 Difference]: Start difference. First operand has 337 places, 417 transitions, 6002 flow. Second operand 8 states and 126 transitions. [2024-06-20 17:10:46,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 437 transitions, 6948 flow [2024-06-20 17:10:48,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 437 transitions, 6836 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-20 17:10:48,451 INFO L231 Difference]: Finished difference. Result has 339 places, 419 transitions, 5991 flow [2024-06-20 17:10:48,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5890, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5991, PETRI_PLACES=339, PETRI_TRANSITIONS=419} [2024-06-20 17:10:48,452 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 296 predicate places. [2024-06-20 17:10:48,452 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 419 transitions, 5991 flow [2024-06-20 17:10:48,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:10:48,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:10:48,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:10:48,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-20 17:10:48,453 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:10:48,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:10:48,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1421439706, now seen corresponding path program 2 times [2024-06-20 17:10:48,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:10:48,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116697169] [2024-06-20 17:10:48,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:10:48,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:10:48,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:10:50,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:10:50,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:10:50,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116697169] [2024-06-20 17:10:50,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116697169] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:10:50,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:10:50,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:10:50,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874017400] [2024-06-20 17:10:50,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:10:50,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:10:50,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:10:50,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:10:50,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:10:50,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:10:50,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 419 transitions, 5991 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:10:50,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:10:50,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:10:50,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:10:52,510 INFO L124 PetriNetUnfolderBase]: 2533/4145 cut-off events. [2024-06-20 17:10:52,510 INFO L125 PetriNetUnfolderBase]: For 617352/617354 co-relation queries the response was YES. [2024-06-20 17:10:52,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38969 conditions, 4145 events. 2533/4145 cut-off events. For 617352/617354 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 24727 event pairs, 501 based on Foata normal form. 1/4145 useless extension candidates. Maximal degree in co-relation 38800. Up to 3874 conditions per place. [2024-06-20 17:10:52,554 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 402 selfloop transitions, 33 changer transitions 0/440 dead transitions. [2024-06-20 17:10:52,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 440 transitions, 6975 flow [2024-06-20 17:10:52,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:10:52,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:10:52,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 138 transitions. [2024-06-20 17:10:52,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36507936507936506 [2024-06-20 17:10:52,556 INFO L175 Difference]: Start difference. First operand has 339 places, 419 transitions, 5991 flow. Second operand 9 states and 138 transitions. [2024-06-20 17:10:52,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 440 transitions, 6975 flow [2024-06-20 17:10:54,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 440 transitions, 6894 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-20 17:10:54,559 INFO L231 Difference]: Finished difference. Result has 342 places, 422 transitions, 6054 flow [2024-06-20 17:10:54,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5910, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=386, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6054, PETRI_PLACES=342, PETRI_TRANSITIONS=422} [2024-06-20 17:10:54,560 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 299 predicate places. [2024-06-20 17:10:54,560 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 422 transitions, 6054 flow [2024-06-20 17:10:54,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:10:54,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:10:54,560 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:10:54,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-20 17:10:54,560 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:10:54,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:10:54,561 INFO L85 PathProgramCache]: Analyzing trace with hash 48993776, now seen corresponding path program 3 times [2024-06-20 17:10:54,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:10:54,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558226020] [2024-06-20 17:10:54,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:10:54,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:10:54,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:10:57,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:10:57,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:10:57,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558226020] [2024-06-20 17:10:57,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558226020] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:10:57,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:10:57,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:10:57,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990942029] [2024-06-20 17:10:57,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:10:57,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:10:57,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:10:57,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:10:57,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:10:57,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:10:57,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 422 transitions, 6054 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:10:57,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:10:57,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:10:57,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:10:58,845 INFO L124 PetriNetUnfolderBase]: 2538/4152 cut-off events. [2024-06-20 17:10:58,845 INFO L125 PetriNetUnfolderBase]: For 628768/628770 co-relation queries the response was YES. [2024-06-20 17:10:58,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39405 conditions, 4152 events. 2538/4152 cut-off events. For 628768/628770 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 24753 event pairs, 501 based on Foata normal form. 1/4152 useless extension candidates. Maximal degree in co-relation 39235. Up to 3875 conditions per place. [2024-06-20 17:10:58,897 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 400 selfloop transitions, 39 changer transitions 0/444 dead transitions. [2024-06-20 17:10:58,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 444 transitions, 7054 flow [2024-06-20 17:10:58,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:10:58,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:10:58,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 151 transitions. [2024-06-20 17:10:58,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3595238095238095 [2024-06-20 17:10:58,899 INFO L175 Difference]: Start difference. First operand has 342 places, 422 transitions, 6054 flow. Second operand 10 states and 151 transitions. [2024-06-20 17:10:58,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 444 transitions, 7054 flow [2024-06-20 17:11:00,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 444 transitions, 6932 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-20 17:11:00,886 INFO L231 Difference]: Finished difference. Result has 345 places, 425 transitions, 6094 flow [2024-06-20 17:11:00,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5932, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6094, PETRI_PLACES=345, PETRI_TRANSITIONS=425} [2024-06-20 17:11:00,886 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 302 predicate places. [2024-06-20 17:11:00,887 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 425 transitions, 6094 flow [2024-06-20 17:11:00,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:11:00,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:11:00,887 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:11:00,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-20 17:11:00,887 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:11:00,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:11:00,887 INFO L85 PathProgramCache]: Analyzing trace with hash -1421259968, now seen corresponding path program 1 times [2024-06-20 17:11:00,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:11:00,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291589395] [2024-06-20 17:11:00,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:11:00,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:11:00,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:11:03,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:11:03,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:11:03,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291589395] [2024-06-20 17:11:03,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291589395] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:11:03,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:11:03,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:11:03,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094508060] [2024-06-20 17:11:03,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:11:03,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:11:03,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:11:03,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:11:03,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:11:03,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:11:03,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 425 transitions, 6094 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:11:03,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:11:03,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:11:03,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:11:04,619 INFO L124 PetriNetUnfolderBase]: 2546/4163 cut-off events. [2024-06-20 17:11:04,619 INFO L125 PetriNetUnfolderBase]: For 648201/648203 co-relation queries the response was YES. [2024-06-20 17:11:04,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39984 conditions, 4163 events. 2546/4163 cut-off events. For 648201/648203 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 24851 event pairs, 502 based on Foata normal form. 2/4164 useless extension candidates. Maximal degree in co-relation 39813. Up to 3887 conditions per place. [2024-06-20 17:11:04,674 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 406 selfloop transitions, 35 changer transitions 0/446 dead transitions. [2024-06-20 17:11:04,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 446 transitions, 7130 flow [2024-06-20 17:11:04,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:11:04,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:11:04,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 138 transitions. [2024-06-20 17:11:04,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36507936507936506 [2024-06-20 17:11:04,676 INFO L175 Difference]: Start difference. First operand has 345 places, 425 transitions, 6094 flow. Second operand 9 states and 138 transitions. [2024-06-20 17:11:04,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 446 transitions, 7130 flow [2024-06-20 17:11:06,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 446 transitions, 6990 flow, removed 33 selfloop flow, removed 8 redundant places. [2024-06-20 17:11:06,551 INFO L231 Difference]: Finished difference. Result has 346 places, 427 transitions, 6137 flow [2024-06-20 17:11:06,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5954, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6137, PETRI_PLACES=346, PETRI_TRANSITIONS=427} [2024-06-20 17:11:06,551 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 303 predicate places. [2024-06-20 17:11:06,552 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 427 transitions, 6137 flow [2024-06-20 17:11:06,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:11:06,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:11:06,552 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] [2024-06-20 17:11:06,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-20 17:11:06,552 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:11:06,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:11:06,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1421260216, now seen corresponding path program 4 times [2024-06-20 17:11:06,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:11:06,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538383501] [2024-06-20 17:11:06,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:11:06,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:11:06,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:11:08,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:11:08,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:11:08,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538383501] [2024-06-20 17:11:08,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538383501] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:11:08,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:11:08,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:11:08,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713073332] [2024-06-20 17:11:08,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:11:08,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:11:08,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:11:08,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:11:08,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:11:08,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:11:08,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 427 transitions, 6137 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:11:08,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:11:08,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:11:08,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:11:10,426 INFO L124 PetriNetUnfolderBase]: 2543/4164 cut-off events. [2024-06-20 17:11:10,427 INFO L125 PetriNetUnfolderBase]: For 650331/650333 co-relation queries the response was YES. [2024-06-20 17:11:10,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39987 conditions, 4164 events. 2543/4164 cut-off events. For 650331/650333 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 24901 event pairs, 503 based on Foata normal form. 1/4164 useless extension candidates. Maximal degree in co-relation 39815. Up to 3874 conditions per place. [2024-06-20 17:11:10,474 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 397 selfloop transitions, 47 changer transitions 0/449 dead transitions. [2024-06-20 17:11:10,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 449 transitions, 7155 flow [2024-06-20 17:11:10,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:11:10,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:11:10,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 152 transitions. [2024-06-20 17:11:10,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3619047619047619 [2024-06-20 17:11:10,475 INFO L175 Difference]: Start difference. First operand has 346 places, 427 transitions, 6137 flow. Second operand 10 states and 152 transitions. [2024-06-20 17:11:10,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 449 transitions, 7155 flow [2024-06-20 17:11:12,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 449 transitions, 6988 flow, removed 50 selfloop flow, removed 7 redundant places. [2024-06-20 17:11:12,460 INFO L231 Difference]: Finished difference. Result has 349 places, 430 transitions, 6156 flow [2024-06-20 17:11:12,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5970, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6156, PETRI_PLACES=349, PETRI_TRANSITIONS=430} [2024-06-20 17:11:12,460 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 306 predicate places. [2024-06-20 17:11:12,460 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 430 transitions, 6156 flow [2024-06-20 17:11:12,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:11:12,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:11:12,461 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] [2024-06-20 17:11:12,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-20 17:11:12,461 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:11:12,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:11:12,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1689418288, now seen corresponding path program 4 times [2024-06-20 17:11:12,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:11:12,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923544621] [2024-06-20 17:11:12,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:11:12,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:11:12,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:11:14,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:11:14,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:11:14,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923544621] [2024-06-20 17:11:14,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923544621] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:11:14,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:11:14,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:11:14,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219434096] [2024-06-20 17:11:14,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:11:14,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:11:14,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:11:14,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:11:14,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:11:14,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:11:14,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 430 transitions, 6156 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:11:14,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:11:14,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:11:14,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:11:15,760 INFO L124 PetriNetUnfolderBase]: 2538/4157 cut-off events. [2024-06-20 17:11:15,760 INFO L125 PetriNetUnfolderBase]: For 653408/653410 co-relation queries the response was YES. [2024-06-20 17:11:15,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39943 conditions, 4157 events. 2538/4157 cut-off events. For 653408/653410 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 24821 event pairs, 457 based on Foata normal form. 2/4159 useless extension candidates. Maximal degree in co-relation 39770. Up to 3869 conditions per place. [2024-06-20 17:11:15,808 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 427 selfloop transitions, 23 changer transitions 0/455 dead transitions. [2024-06-20 17:11:15,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 455 transitions, 7126 flow [2024-06-20 17:11:15,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:11:15,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:11:15,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-20 17:11:15,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41836734693877553 [2024-06-20 17:11:15,810 INFO L175 Difference]: Start difference. First operand has 349 places, 430 transitions, 6156 flow. Second operand 7 states and 123 transitions. [2024-06-20 17:11:15,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 455 transitions, 7126 flow [2024-06-20 17:11:17,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 455 transitions, 6942 flow, removed 47 selfloop flow, removed 8 redundant places. [2024-06-20 17:11:17,735 INFO L231 Difference]: Finished difference. Result has 348 places, 430 transitions, 6026 flow [2024-06-20 17:11:17,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5972, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6026, PETRI_PLACES=348, PETRI_TRANSITIONS=430} [2024-06-20 17:11:17,735 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 305 predicate places. [2024-06-20 17:11:17,736 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 430 transitions, 6026 flow [2024-06-20 17:11:17,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:11:17,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:11:17,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:11:17,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-20 17:11:17,736 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:11:17,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:11:17,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1129213844, now seen corresponding path program 2 times [2024-06-20 17:11:17,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:11:17,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699199089] [2024-06-20 17:11:17,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:11:17,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:11:17,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:11:20,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:11:20,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:11:20,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699199089] [2024-06-20 17:11:20,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699199089] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:11:20,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:11:20,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:11:20,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750786719] [2024-06-20 17:11:20,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:11:20,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:11:20,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:11:20,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:11:20,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:11:20,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:11:20,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 430 transitions, 6026 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:11:20,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:11:20,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:11:20,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:11:21,819 INFO L124 PetriNetUnfolderBase]: 2592/4247 cut-off events. [2024-06-20 17:11:21,819 INFO L125 PetriNetUnfolderBase]: For 705417/705419 co-relation queries the response was YES. [2024-06-20 17:11:21,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41727 conditions, 4247 events. 2592/4247 cut-off events. For 705417/705419 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 25402 event pairs, 499 based on Foata normal form. 2/4249 useless extension candidates. Maximal degree in co-relation 41553. Up to 3849 conditions per place. [2024-06-20 17:11:21,876 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 409 selfloop transitions, 45 changer transitions 0/459 dead transitions. [2024-06-20 17:11:21,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 459 transitions, 7684 flow [2024-06-20 17:11:21,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:11:21,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:11:21,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-20 17:11:21,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3915343915343915 [2024-06-20 17:11:21,878 INFO L175 Difference]: Start difference. First operand has 348 places, 430 transitions, 6026 flow. Second operand 9 states and 148 transitions. [2024-06-20 17:11:21,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 459 transitions, 7684 flow [2024-06-20 17:11:24,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 459 transitions, 7624 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-20 17:11:24,387 INFO L231 Difference]: Finished difference. Result has 351 places, 433 transitions, 6213 flow [2024-06-20 17:11:24,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5966, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=386, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6213, PETRI_PLACES=351, PETRI_TRANSITIONS=433} [2024-06-20 17:11:24,387 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 308 predicate places. [2024-06-20 17:11:24,387 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 433 transitions, 6213 flow [2024-06-20 17:11:24,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:11:24,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:11:24,388 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:11:24,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-20 17:11:24,388 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:11:24,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:11:24,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1128917174, now seen corresponding path program 3 times [2024-06-20 17:11:24,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:11:24,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859636911] [2024-06-20 17:11:24,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:11:24,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:11:24,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:11:27,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:11:27,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:11:27,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859636911] [2024-06-20 17:11:27,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859636911] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:11:27,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:11:27,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:11:27,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213704577] [2024-06-20 17:11:27,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:11:27,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:11:27,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:11:27,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:11:27,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:11:27,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:11:27,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 433 transitions, 6213 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:11:27,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:11:27,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:11:27,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:11:28,718 INFO L124 PetriNetUnfolderBase]: 2600/4255 cut-off events. [2024-06-20 17:11:28,719 INFO L125 PetriNetUnfolderBase]: For 733014/733016 co-relation queries the response was YES. [2024-06-20 17:11:28,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42221 conditions, 4255 events. 2600/4255 cut-off events. For 733014/733016 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 25482 event pairs, 501 based on Foata normal form. 2/4257 useless extension candidates. Maximal degree in co-relation 42046. Up to 3942 conditions per place. [2024-06-20 17:11:28,774 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 404 selfloop transitions, 47 changer transitions 0/456 dead transitions. [2024-06-20 17:11:28,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 456 transitions, 7497 flow [2024-06-20 17:11:28,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:11:28,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:11:28,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 155 transitions. [2024-06-20 17:11:28,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36904761904761907 [2024-06-20 17:11:28,776 INFO L175 Difference]: Start difference. First operand has 351 places, 433 transitions, 6213 flow. Second operand 10 states and 155 transitions. [2024-06-20 17:11:28,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 456 transitions, 7497 flow [2024-06-20 17:11:31,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 456 transitions, 7332 flow, removed 57 selfloop flow, removed 5 redundant places. [2024-06-20 17:11:31,010 INFO L231 Difference]: Finished difference. Result has 356 places, 435 transitions, 6266 flow [2024-06-20 17:11:31,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6052, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=386, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6266, PETRI_PLACES=356, PETRI_TRANSITIONS=435} [2024-06-20 17:11:31,012 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 313 predicate places. [2024-06-20 17:11:31,012 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 435 transitions, 6266 flow [2024-06-20 17:11:31,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:11:31,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:11:31,012 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:11:31,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-20 17:11:31,013 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:11:31,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:11:31,014 INFO L85 PathProgramCache]: Analyzing trace with hash 892741566, now seen corresponding path program 5 times [2024-06-20 17:11:31,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:11:31,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154227432] [2024-06-20 17:11:31,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:11:31,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:11:31,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:11:33,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:11:33,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:11:33,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154227432] [2024-06-20 17:11:33,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154227432] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:11:33,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:11:33,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:11:33,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826223450] [2024-06-20 17:11:33,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:11:33,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:11:33,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:11:33,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:11:33,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:11:33,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:11:33,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 435 transitions, 6266 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:11:33,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:11:33,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:11:33,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:11:34,824 INFO L124 PetriNetUnfolderBase]: 2605/4262 cut-off events. [2024-06-20 17:11:34,825 INFO L125 PetriNetUnfolderBase]: For 736314/736316 co-relation queries the response was YES. [2024-06-20 17:11:34,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42324 conditions, 4262 events. 2605/4262 cut-off events. For 736314/736316 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 25567 event pairs, 507 based on Foata normal form. 1/4263 useless extension candidates. Maximal degree in co-relation 42147. Up to 3956 conditions per place. [2024-06-20 17:11:34,877 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 404 selfloop transitions, 48 changer transitions 0/457 dead transitions. [2024-06-20 17:11:34,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 457 transitions, 7496 flow [2024-06-20 17:11:34,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:11:34,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:11:34,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-20 17:11:34,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3783068783068783 [2024-06-20 17:11:34,879 INFO L175 Difference]: Start difference. First operand has 356 places, 435 transitions, 6266 flow. Second operand 9 states and 143 transitions. [2024-06-20 17:11:34,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 457 transitions, 7496 flow [2024-06-20 17:11:37,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 457 transitions, 7294 flow, removed 52 selfloop flow, removed 8 redundant places. [2024-06-20 17:11:37,470 INFO L231 Difference]: Finished difference. Result has 357 places, 438 transitions, 6229 flow [2024-06-20 17:11:37,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6070, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6229, PETRI_PLACES=357, PETRI_TRANSITIONS=438} [2024-06-20 17:11:37,471 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 314 predicate places. [2024-06-20 17:11:37,471 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 438 transitions, 6229 flow [2024-06-20 17:11:37,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:11:37,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:11:37,471 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:11:37,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-20 17:11:37,472 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:11:37,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:11:37,472 INFO L85 PathProgramCache]: Analyzing trace with hash 279392166, now seen corresponding path program 6 times [2024-06-20 17:11:37,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:11:37,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300584167] [2024-06-20 17:11:37,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:11:37,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:11:37,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:11:39,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:11:39,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:11:39,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300584167] [2024-06-20 17:11:39,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300584167] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:11:39,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:11:39,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:11:39,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390956138] [2024-06-20 17:11:39,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:11:39,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:11:39,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:11:39,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:11:39,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:11:39,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:11:39,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 438 transitions, 6229 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:11:39,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:11:39,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:11:39,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:11:41,051 INFO L124 PetriNetUnfolderBase]: 2602/4260 cut-off events. [2024-06-20 17:11:41,063 INFO L125 PetriNetUnfolderBase]: For 739210/739212 co-relation queries the response was YES. [2024-06-20 17:11:41,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42089 conditions, 4260 events. 2602/4260 cut-off events. For 739210/739212 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 25563 event pairs, 507 based on Foata normal form. 1/4261 useless extension candidates. Maximal degree in co-relation 41911. Up to 3988 conditions per place. [2024-06-20 17:11:41,120 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 429 selfloop transitions, 25 changer transitions 0/459 dead transitions. [2024-06-20 17:11:41,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 459 transitions, 7195 flow [2024-06-20 17:11:41,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:11:41,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:11:41,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-20 17:11:41,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-20 17:11:41,122 INFO L175 Difference]: Start difference. First operand has 357 places, 438 transitions, 6229 flow. Second operand 8 states and 130 transitions. [2024-06-20 17:11:41,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 459 transitions, 7195 flow [2024-06-20 17:11:43,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 459 transitions, 7062 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-20 17:11:43,343 INFO L231 Difference]: Finished difference. Result has 359 places, 438 transitions, 6152 flow [2024-06-20 17:11:43,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6096, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6152, PETRI_PLACES=359, PETRI_TRANSITIONS=438} [2024-06-20 17:11:43,344 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 316 predicate places. [2024-06-20 17:11:43,344 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 438 transitions, 6152 flow [2024-06-20 17:11:43,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:11:43,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:11:43,344 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:11:43,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-20 17:11:43,344 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:11:43,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:11:43,345 INFO L85 PathProgramCache]: Analyzing trace with hash 279571904, now seen corresponding path program 4 times [2024-06-20 17:11:43,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:11:43,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584126465] [2024-06-20 17:11:43,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:11:43,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:11:43,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:11:45,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:11:45,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:11:45,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584126465] [2024-06-20 17:11:45,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584126465] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:11:45,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:11:45,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:11:45,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849653658] [2024-06-20 17:11:45,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:11:45,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:11:45,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:11:45,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:11:45,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:11:45,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:11:45,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 438 transitions, 6152 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:11:45,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:11:45,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:11:45,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:11:47,564 INFO L124 PetriNetUnfolderBase]: 2597/4247 cut-off events. [2024-06-20 17:11:47,564 INFO L125 PetriNetUnfolderBase]: For 738624/738626 co-relation queries the response was YES. [2024-06-20 17:11:47,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41772 conditions, 4247 events. 2597/4247 cut-off events. For 738624/738626 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 25314 event pairs, 506 based on Foata normal form. 2/4249 useless extension candidates. Maximal degree in co-relation 41593. Up to 3975 conditions per place. [2024-06-20 17:11:47,613 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 431 selfloop transitions, 27 changer transitions 0/463 dead transitions. [2024-06-20 17:11:47,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 463 transitions, 7244 flow [2024-06-20 17:11:47,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:11:47,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:11:47,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-20 17:11:47,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37566137566137564 [2024-06-20 17:11:47,614 INFO L175 Difference]: Start difference. First operand has 359 places, 438 transitions, 6152 flow. Second operand 9 states and 142 transitions. [2024-06-20 17:11:47,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 463 transitions, 7244 flow [2024-06-20 17:11:50,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 463 transitions, 7153 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-20 17:11:50,329 INFO L231 Difference]: Finished difference. Result has 360 places, 440 transitions, 6238 flow [2024-06-20 17:11:50,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6061, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6238, PETRI_PLACES=360, PETRI_TRANSITIONS=440} [2024-06-20 17:11:50,330 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 317 predicate places. [2024-06-20 17:11:50,330 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 440 transitions, 6238 flow [2024-06-20 17:11:50,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:11:50,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:11:50,330 INFO 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] [2024-06-20 17:11:50,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-20 17:11:50,330 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:11:50,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:11:50,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1155593531, now seen corresponding path program 1 times [2024-06-20 17:11:50,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:11:50,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640391391] [2024-06-20 17:11:50,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:11:50,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:11:50,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:11:52,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:11:52,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:11:52,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640391391] [2024-06-20 17:11:52,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640391391] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:11:52,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:11:52,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:11:52,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697272519] [2024-06-20 17:11:52,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:11:52,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:11:52,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:11:52,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:11:52,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:11:52,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:11:52,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 440 transitions, 6238 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:11:52,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:11:52,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:11:52,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:11:54,374 INFO L124 PetriNetUnfolderBase]: 2605/4272 cut-off events. [2024-06-20 17:11:54,374 INFO L125 PetriNetUnfolderBase]: For 751774/751780 co-relation queries the response was YES. [2024-06-20 17:11:54,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42105 conditions, 4272 events. 2605/4272 cut-off events. For 751774/751780 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 25522 event pairs, 383 based on Foata normal form. 8/4280 useless extension candidates. Maximal degree in co-relation 41925. Up to 3853 conditions per place. [2024-06-20 17:11:54,430 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 430 selfloop transitions, 44 changer transitions 0/479 dead transitions. [2024-06-20 17:11:54,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 479 transitions, 7356 flow [2024-06-20 17:11:54,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:11:54,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:11:54,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-20 17:11:54,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-20 17:11:54,432 INFO L175 Difference]: Start difference. First operand has 360 places, 440 transitions, 6238 flow. Second operand 9 states and 155 transitions. [2024-06-20 17:11:54,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 479 transitions, 7356 flow [2024-06-20 17:11:56,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 479 transitions, 7197 flow, removed 54 selfloop flow, removed 7 redundant places. [2024-06-20 17:11:56,912 INFO L231 Difference]: Finished difference. Result has 362 places, 442 transitions, 6240 flow [2024-06-20 17:11:56,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6079, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6240, PETRI_PLACES=362, PETRI_TRANSITIONS=442} [2024-06-20 17:11:56,913 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 319 predicate places. [2024-06-20 17:11:56,913 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 442 transitions, 6240 flow [2024-06-20 17:11:56,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:11:56,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:11:56,913 INFO 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] [2024-06-20 17:11:56,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-20 17:11:56,913 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:11:56,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:11:56,923 INFO L85 PathProgramCache]: Analyzing trace with hash 1421290811, now seen corresponding path program 2 times [2024-06-20 17:11:56,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:11:56,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562185352] [2024-06-20 17:11:56,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:11:56,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:11:56,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:11:59,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:11:59,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:11:59,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562185352] [2024-06-20 17:11:59,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562185352] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:11:59,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:11:59,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:11:59,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460846712] [2024-06-20 17:11:59,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:11:59,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:11:59,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:11:59,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:11:59,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:11:59,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:11:59,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 442 transitions, 6240 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:11:59,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:11:59,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:11:59,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:12:01,377 INFO L124 PetriNetUnfolderBase]: 2631/4312 cut-off events. [2024-06-20 17:12:01,378 INFO L125 PetriNetUnfolderBase]: For 761792/761798 co-relation queries the response was YES. [2024-06-20 17:12:01,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42585 conditions, 4312 events. 2631/4312 cut-off events. For 761792/761798 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 25847 event pairs, 488 based on Foata normal form. 8/4320 useless extension candidates. Maximal degree in co-relation 42404. Up to 3953 conditions per place. [2024-06-20 17:12:01,428 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 431 selfloop transitions, 48 changer transitions 0/484 dead transitions. [2024-06-20 17:12:01,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 484 transitions, 7522 flow [2024-06-20 17:12:01,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:12:01,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:12:01,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-20 17:12:01,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-20 17:12:01,430 INFO L175 Difference]: Start difference. First operand has 362 places, 442 transitions, 6240 flow. Second operand 9 states and 150 transitions. [2024-06-20 17:12:01,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 484 transitions, 7522 flow [2024-06-20 17:12:04,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 484 transitions, 7242 flow, removed 37 selfloop flow, removed 9 redundant places. [2024-06-20 17:12:04,723 INFO L231 Difference]: Finished difference. Result has 363 places, 452 transitions, 6306 flow [2024-06-20 17:12:04,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5987, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6306, PETRI_PLACES=363, PETRI_TRANSITIONS=452} [2024-06-20 17:12:04,723 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 320 predicate places. [2024-06-20 17:12:04,724 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 452 transitions, 6306 flow [2024-06-20 17:12:04,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:12:04,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:12:04,724 INFO 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] [2024-06-20 17:12:04,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-20 17:12:04,724 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:12:04,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:12:04,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1421617241, now seen corresponding path program 3 times [2024-06-20 17:12:04,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:12:04,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496015930] [2024-06-20 17:12:04,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:12:04,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:12:04,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:12:07,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:12:07,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:12:07,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496015930] [2024-06-20 17:12:07,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496015930] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:12:07,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:12:07,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:12:07,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975164957] [2024-06-20 17:12:07,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:12:07,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:12:07,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:12:07,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:12:07,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:12:07,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:12:07,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 452 transitions, 6306 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:12:07,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:12:07,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:12:07,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:12:09,318 INFO L124 PetriNetUnfolderBase]: 2644/4333 cut-off events. [2024-06-20 17:12:09,319 INFO L125 PetriNetUnfolderBase]: For 773108/773114 co-relation queries the response was YES. [2024-06-20 17:12:09,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42473 conditions, 4333 events. 2644/4333 cut-off events. For 773108/773114 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 26057 event pairs, 492 based on Foata normal form. 8/4341 useless extension candidates. Maximal degree in co-relation 42291. Up to 3955 conditions per place. [2024-06-20 17:12:09,378 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 424 selfloop transitions, 67 changer transitions 0/496 dead transitions. [2024-06-20 17:12:09,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 496 transitions, 7566 flow [2024-06-20 17:12:09,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:12:09,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:12:09,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 174 transitions. [2024-06-20 17:12:09,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37662337662337664 [2024-06-20 17:12:09,379 INFO L175 Difference]: Start difference. First operand has 363 places, 452 transitions, 6306 flow. Second operand 11 states and 174 transitions. [2024-06-20 17:12:09,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 496 transitions, 7566 flow [2024-06-20 17:12:11,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 496 transitions, 7414 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-20 17:12:12,001 INFO L231 Difference]: Finished difference. Result has 370 places, 463 transitions, 6494 flow [2024-06-20 17:12:12,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6154, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6494, PETRI_PLACES=370, PETRI_TRANSITIONS=463} [2024-06-20 17:12:12,002 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 327 predicate places. [2024-06-20 17:12:12,002 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 463 transitions, 6494 flow [2024-06-20 17:12:12,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:12:12,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:12:12,002 INFO 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] [2024-06-20 17:12:12,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-20 17:12:12,003 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:12:12,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:12:12,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1244131391, now seen corresponding path program 1 times [2024-06-20 17:12:12,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:12:12,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297833880] [2024-06-20 17:12:12,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:12:12,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:12:12,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:12:14,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:12:14,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:12:14,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297833880] [2024-06-20 17:12:14,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297833880] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:12:14,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:12:14,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:12:14,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614147033] [2024-06-20 17:12:14,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:12:14,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:12:14,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:12:14,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:12:14,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:12:14,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:12:14,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 463 transitions, 6494 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:12:14,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:12:14,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:12:14,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:12:16,244 INFO L124 PetriNetUnfolderBase]: 2649/4342 cut-off events. [2024-06-20 17:12:16,245 INFO L125 PetriNetUnfolderBase]: For 778518/778524 co-relation queries the response was YES. [2024-06-20 17:12:16,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42615 conditions, 4342 events. 2649/4342 cut-off events. For 778518/778524 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 26135 event pairs, 492 based on Foata normal form. 7/4349 useless extension candidates. Maximal degree in co-relation 42431. Up to 3909 conditions per place. [2024-06-20 17:12:16,301 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 420 selfloop transitions, 80 changer transitions 0/505 dead transitions. [2024-06-20 17:12:16,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 505 transitions, 7894 flow [2024-06-20 17:12:16,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:12:16,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:12:16,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-20 17:12:16,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-20 17:12:16,303 INFO L175 Difference]: Start difference. First operand has 370 places, 463 transitions, 6494 flow. Second operand 9 states and 161 transitions. [2024-06-20 17:12:16,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 505 transitions, 7894 flow [2024-06-20 17:12:19,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 505 transitions, 7721 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-20 17:12:19,350 INFO L231 Difference]: Finished difference. Result has 372 places, 466 transitions, 6546 flow [2024-06-20 17:12:19,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6321, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=386, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6546, PETRI_PLACES=372, PETRI_TRANSITIONS=466} [2024-06-20 17:12:19,350 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 329 predicate places. [2024-06-20 17:12:19,351 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 466 transitions, 6546 flow [2024-06-20 17:12:19,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:12:19,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:12:19,351 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:12:19,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-20 17:12:19,351 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:12:19,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:12:19,352 INFO L85 PathProgramCache]: Analyzing trace with hash 539596037, now seen corresponding path program 1 times [2024-06-20 17:12:19,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:12:19,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522501277] [2024-06-20 17:12:19,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:12:19,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:12:19,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:12:21,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:12:21,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:12:21,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522501277] [2024-06-20 17:12:21,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522501277] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:12:21,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:12:21,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:12:21,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641384622] [2024-06-20 17:12:21,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:12:21,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:12:21,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:12:21,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:12:21,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:12:21,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:12:21,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 466 transitions, 6546 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:12:21,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:12:21,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:12:21,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:12:23,901 INFO L124 PetriNetUnfolderBase]: 2696/4415 cut-off events. [2024-06-20 17:12:23,902 INFO L125 PetriNetUnfolderBase]: For 831290/831296 co-relation queries the response was YES. [2024-06-20 17:12:23,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44515 conditions, 4415 events. 2696/4415 cut-off events. For 831290/831296 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 26613 event pairs, 490 based on Foata normal form. 7/4422 useless extension candidates. Maximal degree in co-relation 44330. Up to 3870 conditions per place. [2024-06-20 17:12:23,954 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 408 selfloop transitions, 122 changer transitions 0/535 dead transitions. [2024-06-20 17:12:23,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 535 transitions, 9052 flow [2024-06-20 17:12:23,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 17:12:23,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 17:12:23,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 204 transitions. [2024-06-20 17:12:23,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-20 17:12:23,955 INFO L175 Difference]: Start difference. First operand has 372 places, 466 transitions, 6546 flow. Second operand 12 states and 204 transitions. [2024-06-20 17:12:23,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 535 transitions, 9052 flow [2024-06-20 17:12:27,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 535 transitions, 8854 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-20 17:12:27,019 INFO L231 Difference]: Finished difference. Result has 378 places, 489 transitions, 7335 flow [2024-06-20 17:12:27,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6348, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7335, PETRI_PLACES=378, PETRI_TRANSITIONS=489} [2024-06-20 17:12:27,020 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 335 predicate places. [2024-06-20 17:12:27,020 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 489 transitions, 7335 flow [2024-06-20 17:12:27,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:12:27,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:12:27,020 INFO 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] [2024-06-20 17:12:27,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-20 17:12:27,020 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:12:27,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:12:27,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1244251361, now seen corresponding path program 2 times [2024-06-20 17:12:27,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:12:27,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665213754] [2024-06-20 17:12:27,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:12:27,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:12:27,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:12:29,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:12:29,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:12:29,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665213754] [2024-06-20 17:12:29,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665213754] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:12:29,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:12:29,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:12:29,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128554439] [2024-06-20 17:12:29,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:12:29,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:12:29,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:12:29,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:12:29,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:12:29,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:12:29,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 489 transitions, 7335 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:12:29,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:12:29,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:12:29,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:12:31,900 INFO L124 PetriNetUnfolderBase]: 2693/4413 cut-off events. [2024-06-20 17:12:31,900 INFO L125 PetriNetUnfolderBase]: For 844504/844510 co-relation queries the response was YES. [2024-06-20 17:12:31,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45208 conditions, 4413 events. 2693/4413 cut-off events. For 844504/844510 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 26585 event pairs, 498 based on Foata normal form. 7/4420 useless extension candidates. Maximal degree in co-relation 45020. Up to 3973 conditions per place. [2024-06-20 17:12:31,962 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 443 selfloop transitions, 80 changer transitions 0/528 dead transitions. [2024-06-20 17:12:31,963 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 528 transitions, 8495 flow [2024-06-20 17:12:31,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:12:31,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:12:31,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 172 transitions. [2024-06-20 17:12:31,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4095238095238095 [2024-06-20 17:12:31,964 INFO L175 Difference]: Start difference. First operand has 378 places, 489 transitions, 7335 flow. Second operand 10 states and 172 transitions. [2024-06-20 17:12:31,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 528 transitions, 8495 flow [2024-06-20 17:12:34,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 528 transitions, 8205 flow, removed 104 selfloop flow, removed 6 redundant places. [2024-06-20 17:12:34,894 INFO L231 Difference]: Finished difference. Result has 382 places, 489 transitions, 7211 flow [2024-06-20 17:12:34,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7045, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7211, PETRI_PLACES=382, PETRI_TRANSITIONS=489} [2024-06-20 17:12:34,895 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 339 predicate places. [2024-06-20 17:12:34,895 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 489 transitions, 7211 flow [2024-06-20 17:12:34,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:12:34,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:12:34,895 INFO 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] [2024-06-20 17:12:34,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-20 17:12:34,896 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:12:34,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:12:34,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1735914639, now seen corresponding path program 4 times [2024-06-20 17:12:34,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:12:34,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112824495] [2024-06-20 17:12:34,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:12:34,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:12:34,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:12:37,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:12:37,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:12:37,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112824495] [2024-06-20 17:12:37,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112824495] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:12:37,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:12:37,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:12:37,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762550503] [2024-06-20 17:12:37,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:12:37,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:12:37,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:12:37,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:12:37,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:12:37,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:12:37,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 489 transitions, 7211 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:12:37,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:12:37,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:12:37,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:12:38,996 INFO L124 PetriNetUnfolderBase]: 2701/4422 cut-off events. [2024-06-20 17:12:38,996 INFO L125 PetriNetUnfolderBase]: For 863916/863918 co-relation queries the response was YES. [2024-06-20 17:12:39,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45296 conditions, 4422 events. 2701/4422 cut-off events. For 863916/863918 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 26597 event pairs, 502 based on Foata normal form. 2/4424 useless extension candidates. Maximal degree in co-relation 45106. Up to 4046 conditions per place. [2024-06-20 17:12:39,059 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 454 selfloop transitions, 55 changer transitions 0/514 dead transitions. [2024-06-20 17:12:39,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 514 transitions, 8329 flow [2024-06-20 17:12:39,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:12:39,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:12:39,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-20 17:12:39,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-20 17:12:39,060 INFO L175 Difference]: Start difference. First operand has 382 places, 489 transitions, 7211 flow. Second operand 9 states and 144 transitions. [2024-06-20 17:12:39,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 514 transitions, 8329 flow [2024-06-20 17:12:42,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 514 transitions, 8159 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-20 17:12:42,169 INFO L231 Difference]: Finished difference. Result has 383 places, 491 transitions, 7190 flow [2024-06-20 17:12:42,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7043, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7190, PETRI_PLACES=383, PETRI_TRANSITIONS=491} [2024-06-20 17:12:42,169 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 340 predicate places. [2024-06-20 17:12:42,170 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 491 transitions, 7190 flow [2024-06-20 17:12:42,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:12:42,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:12:42,170 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:12:42,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-20 17:12:42,170 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:12:42,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:12:42,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1725189879, now seen corresponding path program 5 times [2024-06-20 17:12:42,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:12:42,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327291853] [2024-06-20 17:12:42,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:12:42,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:12:42,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:12:44,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:12:44,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:12:44,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327291853] [2024-06-20 17:12:44,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327291853] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:12:44,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:12:44,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:12:44,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215040447] [2024-06-20 17:12:44,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:12:44,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:12:44,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:12:44,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:12:44,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:12:44,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:12:44,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 491 transitions, 7190 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:12:44,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:12:44,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:12:44,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:12:46,629 INFO L124 PetriNetUnfolderBase]: 2709/4434 cut-off events. [2024-06-20 17:12:46,630 INFO L125 PetriNetUnfolderBase]: For 877124/877126 co-relation queries the response was YES. [2024-06-20 17:12:46,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45426 conditions, 4434 events. 2709/4434 cut-off events. For 877124/877126 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 26663 event pairs, 502 based on Foata normal form. 2/4436 useless extension candidates. Maximal degree in co-relation 45235. Up to 4073 conditions per place. [2024-06-20 17:12:46,687 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 463 selfloop transitions, 48 changer transitions 0/516 dead transitions. [2024-06-20 17:12:46,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 516 transitions, 8314 flow [2024-06-20 17:12:46,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:12:46,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:12:46,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-20 17:12:46,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3783068783068783 [2024-06-20 17:12:46,690 INFO L175 Difference]: Start difference. First operand has 383 places, 491 transitions, 7190 flow. Second operand 9 states and 143 transitions. [2024-06-20 17:12:46,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 516 transitions, 8314 flow [2024-06-20 17:12:50,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 516 transitions, 8183 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-20 17:12:50,501 INFO L231 Difference]: Finished difference. Result has 387 places, 494 transitions, 7227 flow [2024-06-20 17:12:50,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7059, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=443, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7227, PETRI_PLACES=387, PETRI_TRANSITIONS=494} [2024-06-20 17:12:50,502 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 344 predicate places. [2024-06-20 17:12:50,503 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 494 transitions, 7227 flow [2024-06-20 17:12:50,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:12:50,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:12:50,503 INFO 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] [2024-06-20 17:12:50,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-20 17:12:50,505 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:12:50,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:12:50,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1724863449, now seen corresponding path program 6 times [2024-06-20 17:12:50,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:12:50,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322156770] [2024-06-20 17:12:50,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:12:50,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:12:50,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:12:53,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:12:53,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:12:53,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322156770] [2024-06-20 17:12:53,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322156770] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:12:53,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:12:53,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:12:53,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954170679] [2024-06-20 17:12:53,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:12:53,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:12:53,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:12:53,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:12:53,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:12:53,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:12:53,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 494 transitions, 7227 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:12:53,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:12:53,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:12:53,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:12:54,896 INFO L124 PetriNetUnfolderBase]: 2725/4454 cut-off events. [2024-06-20 17:12:54,897 INFO L125 PetriNetUnfolderBase]: For 892105/892107 co-relation queries the response was YES. [2024-06-20 17:12:54,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45749 conditions, 4454 events. 2725/4454 cut-off events. For 892105/892107 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 26768 event pairs, 502 based on Foata normal form. 2/4456 useless extension candidates. Maximal degree in co-relation 45556. Up to 4092 conditions per place. [2024-06-20 17:12:54,962 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 469 selfloop transitions, 47 changer transitions 0/521 dead transitions. [2024-06-20 17:12:54,963 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 521 transitions, 8408 flow [2024-06-20 17:12:54,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:12:54,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:12:54,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-20 17:12:54,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3783068783068783 [2024-06-20 17:12:54,964 INFO L175 Difference]: Start difference. First operand has 387 places, 494 transitions, 7227 flow. Second operand 9 states and 143 transitions. [2024-06-20 17:12:54,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 521 transitions, 8408 flow [2024-06-20 17:12:58,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 521 transitions, 8288 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-20 17:12:58,886 INFO L231 Difference]: Finished difference. Result has 392 places, 498 transitions, 7307 flow [2024-06-20 17:12:58,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7107, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7307, PETRI_PLACES=392, PETRI_TRANSITIONS=498} [2024-06-20 17:12:58,886 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 349 predicate places. [2024-06-20 17:12:58,887 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 498 transitions, 7307 flow [2024-06-20 17:12:58,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:12:58,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:12:58,887 INFO 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] [2024-06-20 17:12:58,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-20 17:12:58,887 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:12:58,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:12:58,888 INFO L85 PathProgramCache]: Analyzing trace with hash -447080049, now seen corresponding path program 3 times [2024-06-20 17:12:58,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:12:58,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419325102] [2024-06-20 17:12:58,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:12:58,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:12:58,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:13:01,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:13:01,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:13:01,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419325102] [2024-06-20 17:13:01,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419325102] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:13:01,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:13:01,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:13:01,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832935158] [2024-06-20 17:13:01,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:13:01,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:13:01,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:13:01,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:13:01,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:13:01,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:13:01,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 498 transitions, 7307 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:13:01,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:13:01,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:13:01,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:13:03,528 INFO L124 PetriNetUnfolderBase]: 2770/4526 cut-off events. [2024-06-20 17:13:03,529 INFO L125 PetriNetUnfolderBase]: For 934820/934822 co-relation queries the response was YES. [2024-06-20 17:13:03,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47064 conditions, 4526 events. 2770/4526 cut-off events. For 934820/934822 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 27296 event pairs, 527 based on Foata normal form. 1/4526 useless extension candidates. Maximal degree in co-relation 46869. Up to 3787 conditions per place. [2024-06-20 17:13:03,592 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 361 selfloop transitions, 181 changer transitions 0/547 dead transitions. [2024-06-20 17:13:03,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 547 transitions, 9620 flow [2024-06-20 17:13:03,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:13:03,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:13:03,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-20 17:13:03,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-20 17:13:03,594 INFO L175 Difference]: Start difference. First operand has 392 places, 498 transitions, 7307 flow. Second operand 8 states and 148 transitions. [2024-06-20 17:13:03,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 547 transitions, 9620 flow [2024-06-20 17:13:07,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 547 transitions, 9459 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-20 17:13:07,408 INFO L231 Difference]: Finished difference. Result has 394 places, 516 transitions, 7939 flow [2024-06-20 17:13:07,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7146, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7939, PETRI_PLACES=394, PETRI_TRANSITIONS=516} [2024-06-20 17:13:07,408 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 351 predicate places. [2024-06-20 17:13:07,408 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 516 transitions, 7939 flow [2024-06-20 17:13:07,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:13:07,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:13:07,409 INFO 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] [2024-06-20 17:13:07,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-20 17:13:07,409 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:13:07,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:13:07,409 INFO L85 PathProgramCache]: Analyzing trace with hash -446781519, now seen corresponding path program 4 times [2024-06-20 17:13:07,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:13:07,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170292580] [2024-06-20 17:13:07,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:13:07,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:13:07,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:13:10,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:13:10,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:13:10,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170292580] [2024-06-20 17:13:10,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170292580] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:13:10,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:13:10,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:13:10,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239862821] [2024-06-20 17:13:10,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:13:10,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:13:10,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:13:10,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:13:10,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:13:10,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:13:10,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 516 transitions, 7939 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:13:10,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:13:10,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:13:10,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:13:12,419 INFO L124 PetriNetUnfolderBase]: 2783/4544 cut-off events. [2024-06-20 17:13:12,420 INFO L125 PetriNetUnfolderBase]: For 957759/957761 co-relation queries the response was YES. [2024-06-20 17:13:12,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47756 conditions, 4544 events. 2783/4544 cut-off events. For 957759/957761 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 27428 event pairs, 527 based on Foata normal form. 1/4544 useless extension candidates. Maximal degree in co-relation 47560. Up to 3802 conditions per place. [2024-06-20 17:13:12,477 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 358 selfloop transitions, 186 changer transitions 0/549 dead transitions. [2024-06-20 17:13:12,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 549 transitions, 9975 flow [2024-06-20 17:13:12,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:13:12,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:13:12,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-20 17:13:12,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-20 17:13:12,483 INFO L175 Difference]: Start difference. First operand has 394 places, 516 transitions, 7939 flow. Second operand 8 states and 144 transitions. [2024-06-20 17:13:12,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 549 transitions, 9975 flow [2024-06-20 17:13:16,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 549 transitions, 9658 flow, removed 75 selfloop flow, removed 3 redundant places. [2024-06-20 17:13:16,323 INFO L231 Difference]: Finished difference. Result has 399 places, 522 transitions, 8150 flow [2024-06-20 17:13:16,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7654, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8150, PETRI_PLACES=399, PETRI_TRANSITIONS=522} [2024-06-20 17:13:16,323 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 356 predicate places. [2024-06-20 17:13:16,323 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 522 transitions, 8150 flow [2024-06-20 17:13:16,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:13:16,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:13:16,324 INFO 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] [2024-06-20 17:13:16,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-20 17:13:16,324 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:13:16,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:13:16,324 INFO L85 PathProgramCache]: Analyzing trace with hash -446781147, now seen corresponding path program 1 times [2024-06-20 17:13:16,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:13:16,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696494267] [2024-06-20 17:13:16,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:13:16,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:13:16,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:13:18,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:13:18,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:13:18,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696494267] [2024-06-20 17:13:18,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696494267] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:13:18,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:13:18,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:13:18,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321563741] [2024-06-20 17:13:18,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:13:18,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:13:18,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:13:18,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:13:18,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:13:18,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:13:18,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 522 transitions, 8150 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:13:18,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:13:18,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:13:18,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:13:20,365 INFO L124 PetriNetUnfolderBase]: 2788/4547 cut-off events. [2024-06-20 17:13:20,365 INFO L125 PetriNetUnfolderBase]: For 974881/974887 co-relation queries the response was YES. [2024-06-20 17:13:20,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47910 conditions, 4547 events. 2788/4547 cut-off events. For 974881/974887 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 27401 event pairs, 511 based on Foata normal form. 7/4553 useless extension candidates. Maximal degree in co-relation 47713. Up to 4106 conditions per place. [2024-06-20 17:13:20,434 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 457 selfloop transitions, 89 changer transitions 0/551 dead transitions. [2024-06-20 17:13:20,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 551 transitions, 9410 flow [2024-06-20 17:13:20,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:13:20,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:13:20,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-20 17:13:20,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-20 17:13:20,436 INFO L175 Difference]: Start difference. First operand has 399 places, 522 transitions, 8150 flow. Second operand 8 states and 138 transitions. [2024-06-20 17:13:20,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 551 transitions, 9410 flow [2024-06-20 17:13:24,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 551 transitions, 9097 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-20 17:13:24,702 INFO L231 Difference]: Finished difference. Result has 403 places, 525 transitions, 8117 flow [2024-06-20 17:13:24,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7837, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8117, PETRI_PLACES=403, PETRI_TRANSITIONS=525} [2024-06-20 17:13:24,702 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 360 predicate places. [2024-06-20 17:13:24,702 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 525 transitions, 8117 flow [2024-06-20 17:13:24,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:13:24,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:13:24,703 INFO 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] [2024-06-20 17:13:24,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-20 17:13:24,703 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:13:24,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:13:24,704 INFO L85 PathProgramCache]: Analyzing trace with hash 469225047, now seen corresponding path program 5 times [2024-06-20 17:13:24,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:13:24,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703198544] [2024-06-20 17:13:24,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:13:24,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:13:24,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:13:27,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:13:27,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:13:27,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703198544] [2024-06-20 17:13:27,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703198544] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:13:27,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:13:27,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:13:27,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658112471] [2024-06-20 17:13:27,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:13:27,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:13:27,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:13:27,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:13:27,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:13:27,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:13:27,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 525 transitions, 8117 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:13:27,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:13:27,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:13:27,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:13:30,324 INFO L124 PetriNetUnfolderBase]: 2809/4579 cut-off events. [2024-06-20 17:13:30,324 INFO L125 PetriNetUnfolderBase]: For 1005945/1005947 co-relation queries the response was YES. [2024-06-20 17:13:30,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48638 conditions, 4579 events. 2809/4579 cut-off events. For 1005945/1005947 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 27602 event pairs, 524 based on Foata normal form. 1/4578 useless extension candidates. Maximal degree in co-relation 48440. Up to 3833 conditions per place. [2024-06-20 17:13:30,398 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 366 selfloop transitions, 198 changer transitions 0/569 dead transitions. [2024-06-20 17:13:30,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 569 transitions, 10037 flow [2024-06-20 17:13:30,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:13:30,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:13:30,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-20 17:13:30,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-20 17:13:30,400 INFO L175 Difference]: Start difference. First operand has 403 places, 525 transitions, 8117 flow. Second operand 9 states and 164 transitions. [2024-06-20 17:13:30,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 569 transitions, 10037 flow [2024-06-20 17:13:34,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 569 transitions, 9805 flow, removed 42 selfloop flow, removed 5 redundant places. [2024-06-20 17:13:34,689 INFO L231 Difference]: Finished difference. Result has 407 places, 534 transitions, 8491 flow [2024-06-20 17:13:34,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7885, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=525, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8491, PETRI_PLACES=407, PETRI_TRANSITIONS=534} [2024-06-20 17:13:34,690 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 364 predicate places. [2024-06-20 17:13:34,690 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 534 transitions, 8491 flow [2024-06-20 17:13:34,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:13:34,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:13:34,690 INFO 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] [2024-06-20 17:13:34,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-20 17:13:34,690 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:13:34,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:13:34,691 INFO L85 PathProgramCache]: Analyzing trace with hash -452322273, now seen corresponding path program 2 times [2024-06-20 17:13:34,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:13:34,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544272891] [2024-06-20 17:13:34,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:13:34,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:13:34,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:13:37,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:13:37,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:13:37,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544272891] [2024-06-20 17:13:37,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544272891] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:13:37,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:13:37,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:13:37,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101900259] [2024-06-20 17:13:37,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:13:37,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:13:37,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:13:37,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:13:37,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:13:37,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:13:37,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 534 transitions, 8491 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:13:37,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:13:37,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:13:37,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:13:39,321 INFO L124 PetriNetUnfolderBase]: 2872/4678 cut-off events. [2024-06-20 17:13:39,321 INFO L125 PetriNetUnfolderBase]: For 1089053/1089055 co-relation queries the response was YES. [2024-06-20 17:13:39,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51619 conditions, 4678 events. 2872/4678 cut-off events. For 1089053/1089055 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 28292 event pairs, 525 based on Foata normal form. 1/4677 useless extension candidates. Maximal degree in co-relation 51420. Up to 3653 conditions per place. [2024-06-20 17:13:39,393 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 305 selfloop transitions, 279 changer transitions 0/589 dead transitions. [2024-06-20 17:13:39,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 589 transitions, 11673 flow [2024-06-20 17:13:39,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-20 17:13:39,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-20 17:13:39,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 215 transitions. [2024-06-20 17:13:39,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39377289377289376 [2024-06-20 17:13:39,395 INFO L175 Difference]: Start difference. First operand has 407 places, 534 transitions, 8491 flow. Second operand 13 states and 215 transitions. [2024-06-20 17:13:39,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 589 transitions, 11673 flow [2024-06-20 17:13:43,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 589 transitions, 11199 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-20 17:13:43,582 INFO L231 Difference]: Finished difference. Result has 415 places, 548 transitions, 9340 flow [2024-06-20 17:13:43,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8017, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=534, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=269, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=9340, PETRI_PLACES=415, PETRI_TRANSITIONS=548} [2024-06-20 17:13:43,582 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 372 predicate places. [2024-06-20 17:13:43,582 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 548 transitions, 9340 flow [2024-06-20 17:13:43,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:13:43,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:13:43,583 INFO 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] [2024-06-20 17:13:43,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-20 17:13:43,583 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:13:43,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:13:43,583 INFO L85 PathProgramCache]: Analyzing trace with hash -452322459, now seen corresponding path program 6 times [2024-06-20 17:13:43,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:13:43,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134111686] [2024-06-20 17:13:43,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:13:43,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:13:43,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:13:46,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:13:46,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:13:46,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134111686] [2024-06-20 17:13:46,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134111686] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:13:46,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:13:46,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:13:46,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111276113] [2024-06-20 17:13:46,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:13:46,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:13:46,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:13:46,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:13:46,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:13:46,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:13:46,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 548 transitions, 9340 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:13:46,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:13:46,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:13:46,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:13:49,011 INFO L124 PetriNetUnfolderBase]: 2877/4685 cut-off events. [2024-06-20 17:13:49,011 INFO L125 PetriNetUnfolderBase]: For 1112485/1112487 co-relation queries the response was YES. [2024-06-20 17:13:49,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52526 conditions, 4685 events. 2877/4685 cut-off events. For 1112485/1112487 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 28321 event pairs, 531 based on Foata normal form. 1/4684 useless extension candidates. Maximal degree in co-relation 52325. Up to 3928 conditions per place. [2024-06-20 17:13:49,080 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 375 selfloop transitions, 201 changer transitions 0/581 dead transitions. [2024-06-20 17:13:49,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 581 transitions, 10884 flow [2024-06-20 17:13:49,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:13:49,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:13:49,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-20 17:13:49,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41798941798941797 [2024-06-20 17:13:49,082 INFO L175 Difference]: Start difference. First operand has 415 places, 548 transitions, 9340 flow. Second operand 9 states and 158 transitions. [2024-06-20 17:13:49,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 581 transitions, 10884 flow [2024-06-20 17:13:53,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 581 transitions, 10393 flow, removed 123 selfloop flow, removed 6 redundant places. [2024-06-20 17:13:53,590 INFO L231 Difference]: Finished difference. Result has 418 places, 551 transitions, 9317 flow [2024-06-20 17:13:53,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8852, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=548, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9317, PETRI_PLACES=418, PETRI_TRANSITIONS=551} [2024-06-20 17:13:53,591 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 375 predicate places. [2024-06-20 17:13:53,591 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 551 transitions, 9317 flow [2024-06-20 17:13:53,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:13:53,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:13:53,591 INFO 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] [2024-06-20 17:13:53,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-20 17:13:53,592 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:13:53,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:13:53,592 INFO L85 PathProgramCache]: Analyzing trace with hash -443067843, now seen corresponding path program 3 times [2024-06-20 17:13:53,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:13:53,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602441840] [2024-06-20 17:13:53,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:13:53,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:13:53,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:13:55,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:13:55,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:13:55,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602441840] [2024-06-20 17:13:55,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602441840] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:13:55,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:13:55,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:13:55,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041903795] [2024-06-20 17:13:55,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:13:55,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:13:55,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:13:55,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:13:55,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:13:55,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:13:55,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 551 transitions, 9317 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:13:55,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:13:55,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:13:55,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:13:57,902 INFO L124 PetriNetUnfolderBase]: 2882/4698 cut-off events. [2024-06-20 17:13:57,903 INFO L125 PetriNetUnfolderBase]: For 1124867/1124869 co-relation queries the response was YES. [2024-06-20 17:13:57,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52819 conditions, 4698 events. 2882/4698 cut-off events. For 1124867/1124869 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 28446 event pairs, 533 based on Foata normal form. 1/4697 useless extension candidates. Maximal degree in co-relation 52616. Up to 3932 conditions per place. [2024-06-20 17:13:57,968 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 371 selfloop transitions, 204 changer transitions 0/580 dead transitions. [2024-06-20 17:13:57,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 580 transitions, 10908 flow [2024-06-20 17:13:57,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:13:57,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:13:57,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-20 17:13:57,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-20 17:13:57,969 INFO L175 Difference]: Start difference. First operand has 418 places, 551 transitions, 9317 flow. Second operand 9 states and 154 transitions. [2024-06-20 17:13:57,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 580 transitions, 10908 flow [2024-06-20 17:14:02,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 580 transitions, 10642 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-20 17:14:02,851 INFO L231 Difference]: Finished difference. Result has 421 places, 554 transitions, 9590 flow [2024-06-20 17:14:02,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9051, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=201, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9590, PETRI_PLACES=421, PETRI_TRANSITIONS=554} [2024-06-20 17:14:02,852 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 378 predicate places. [2024-06-20 17:14:02,852 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 554 transitions, 9590 flow [2024-06-20 17:14:02,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:14:02,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:14:02,853 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:14:02,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-20 17:14:02,853 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:14:02,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:14:02,853 INFO L85 PathProgramCache]: Analyzing trace with hash -443062449, now seen corresponding path program 7 times [2024-06-20 17:14:02,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:14:02,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763592389] [2024-06-20 17:14:02,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:14:02,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:14:02,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:14:05,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:14:05,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:14:05,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763592389] [2024-06-20 17:14:05,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763592389] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:14:05,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:14:05,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:14:05,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637413294] [2024-06-20 17:14:05,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:14:05,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:14:05,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:14:05,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:14:05,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:14:05,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:14:05,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 554 transitions, 9590 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:14:05,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:14:05,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:14:05,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:14:08,138 INFO L124 PetriNetUnfolderBase]: 2887/4711 cut-off events. [2024-06-20 17:14:08,138 INFO L125 PetriNetUnfolderBase]: For 1145079/1145081 co-relation queries the response was YES. [2024-06-20 17:14:08,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53100 conditions, 4711 events. 2887/4711 cut-off events. For 1145079/1145081 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 28630 event pairs, 533 based on Foata normal form. 1/4710 useless extension candidates. Maximal degree in co-relation 52896. Up to 3941 conditions per place. [2024-06-20 17:14:08,205 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 375 selfloop transitions, 204 changer transitions 0/584 dead transitions. [2024-06-20 17:14:08,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 584 transitions, 11394 flow [2024-06-20 17:14:08,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:14:08,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:14:08,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-20 17:14:08,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-20 17:14:08,207 INFO L175 Difference]: Start difference. First operand has 421 places, 554 transitions, 9590 flow. Second operand 9 states and 156 transitions. [2024-06-20 17:14:08,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 584 transitions, 11394 flow [2024-06-20 17:14:13,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 584 transitions, 10878 flow, removed 53 selfloop flow, removed 7 redundant places. [2024-06-20 17:14:13,381 INFO L231 Difference]: Finished difference. Result has 423 places, 557 transitions, 9554 flow [2024-06-20 17:14:13,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9080, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=554, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=201, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9554, PETRI_PLACES=423, PETRI_TRANSITIONS=557} [2024-06-20 17:14:13,382 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 380 predicate places. [2024-06-20 17:14:13,382 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 557 transitions, 9554 flow [2024-06-20 17:14:13,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:14:13,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:14:13,383 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:14:13,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-20 17:14:13,383 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:14:13,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:14:13,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1686067137, now seen corresponding path program 2 times [2024-06-20 17:14:13,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:14:13,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066839054] [2024-06-20 17:14:13,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:14:13,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:14:13,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:14:15,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:14:15,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:14:15,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066839054] [2024-06-20 17:14:15,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066839054] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:14:15,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:14:15,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:14:15,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926717827] [2024-06-20 17:14:15,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:14:15,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:14:15,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:14:15,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:14:15,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:14:15,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:14:15,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 557 transitions, 9554 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:14:15,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:14:15,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:14:15,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:14:18,132 INFO L124 PetriNetUnfolderBase]: 2900/4734 cut-off events. [2024-06-20 17:14:18,132 INFO L125 PetriNetUnfolderBase]: For 1168404/1168410 co-relation queries the response was YES. [2024-06-20 17:14:18,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53504 conditions, 4734 events. 2900/4734 cut-off events. For 1168404/1168410 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 28774 event pairs, 520 based on Foata normal form. 7/4740 useless extension candidates. Maximal degree in co-relation 53299. Up to 4256 conditions per place. [2024-06-20 17:14:18,193 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 491 selfloop transitions, 96 changer transitions 0/592 dead transitions. [2024-06-20 17:14:18,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 592 transitions, 11240 flow [2024-06-20 17:14:18,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:14:18,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:14:18,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2024-06-20 17:14:18,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3904761904761905 [2024-06-20 17:14:18,208 INFO L175 Difference]: Start difference. First operand has 423 places, 557 transitions, 9554 flow. Second operand 10 states and 164 transitions. [2024-06-20 17:14:18,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 592 transitions, 11240 flow [2024-06-20 17:14:23,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 592 transitions, 10963 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-20 17:14:23,125 INFO L231 Difference]: Finished difference. Result has 428 places, 563 transitions, 9653 flow [2024-06-20 17:14:23,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9277, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=464, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9653, PETRI_PLACES=428, PETRI_TRANSITIONS=563} [2024-06-20 17:14:23,126 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 385 predicate places. [2024-06-20 17:14:23,126 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 563 transitions, 9653 flow [2024-06-20 17:14:23,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:14:23,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:14:23,126 INFO 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] [2024-06-20 17:14:23,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-20 17:14:23,127 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:14:23,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:14:23,127 INFO L85 PathProgramCache]: Analyzing trace with hash 532570717, now seen corresponding path program 3 times [2024-06-20 17:14:23,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:14:23,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97354270] [2024-06-20 17:14:23,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:14:23,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:14:23,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:14:25,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:14:25,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:14:25,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97354270] [2024-06-20 17:14:25,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97354270] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:14:25,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:14:25,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:14:25,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575735684] [2024-06-20 17:14:25,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:14:25,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:14:25,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:14:25,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:14:25,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:14:25,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:14:25,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 563 transitions, 9653 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:14:25,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:14:25,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:14:25,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:14:28,297 INFO L124 PetriNetUnfolderBase]: 2969/4838 cut-off events. [2024-06-20 17:14:28,297 INFO L125 PetriNetUnfolderBase]: For 1284381/1284387 co-relation queries the response was YES. [2024-06-20 17:14:28,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56290 conditions, 4838 events. 2969/4838 cut-off events. For 1284381/1284387 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 29431 event pairs, 483 based on Foata normal form. 7/4844 useless extension candidates. Maximal degree in co-relation 56084. Up to 3690 conditions per place. [2024-06-20 17:14:28,362 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 392 selfloop transitions, 204 changer transitions 0/601 dead transitions. [2024-06-20 17:14:28,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 601 transitions, 11481 flow [2024-06-20 17:14:28,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:14:28,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:14:28,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 169 transitions. [2024-06-20 17:14:28,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4023809523809524 [2024-06-20 17:14:28,365 INFO L175 Difference]: Start difference. First operand has 428 places, 563 transitions, 9653 flow. Second operand 10 states and 169 transitions. [2024-06-20 17:14:28,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 601 transitions, 11481 flow [2024-06-20 17:14:33,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 601 transitions, 11293 flow, removed 72 selfloop flow, removed 5 redundant places. [2024-06-20 17:14:33,221 INFO L231 Difference]: Finished difference. Result has 434 places, 565 transitions, 10107 flow [2024-06-20 17:14:33,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9465, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=202, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10107, PETRI_PLACES=434, PETRI_TRANSITIONS=565} [2024-06-20 17:14:33,221 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 391 predicate places. [2024-06-20 17:14:33,221 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 565 transitions, 10107 flow [2024-06-20 17:14:33,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:14:33,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:14:33,222 INFO 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] [2024-06-20 17:14:33,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-20 17:14:33,222 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:14:33,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:14:33,222 INFO L85 PathProgramCache]: Analyzing trace with hash -443068029, now seen corresponding path program 8 times [2024-06-20 17:14:33,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:14:33,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707083604] [2024-06-20 17:14:33,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:14:33,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:14:33,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:14:36,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:14:36,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:14:36,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707083604] [2024-06-20 17:14:36,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707083604] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:14:36,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:14:36,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:14:36,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625124363] [2024-06-20 17:14:36,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:14:36,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:14:36,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:14:36,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:14:36,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:14:36,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:14:36,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 565 transitions, 10107 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:14:36,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:14:36,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:14:36,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:14:38,664 INFO L124 PetriNetUnfolderBase]: 2966/4835 cut-off events. [2024-06-20 17:14:38,664 INFO L125 PetriNetUnfolderBase]: For 1293705/1293707 co-relation queries the response was YES. [2024-06-20 17:14:38,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57076 conditions, 4835 events. 2966/4835 cut-off events. For 1293705/1293707 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 29420 event pairs, 557 based on Foata normal form. 1/4834 useless extension candidates. Maximal degree in co-relation 56867. Up to 4060 conditions per place. [2024-06-20 17:14:38,732 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 382 selfloop transitions, 204 changer transitions 0/591 dead transitions. [2024-06-20 17:14:38,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 591 transitions, 11609 flow [2024-06-20 17:14:38,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:14:38,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:14:38,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-20 17:14:38,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-20 17:14:38,733 INFO L175 Difference]: Start difference. First operand has 434 places, 565 transitions, 10107 flow. Second operand 9 states and 154 transitions. [2024-06-20 17:14:38,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 591 transitions, 11609 flow [2024-06-20 17:14:43,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 591 transitions, 11472 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-20 17:14:43,383 INFO L231 Difference]: Finished difference. Result has 436 places, 565 transitions, 10384 flow [2024-06-20 17:14:43,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9970, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=204, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10384, PETRI_PLACES=436, PETRI_TRANSITIONS=565} [2024-06-20 17:14:43,384 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 393 predicate places. [2024-06-20 17:14:43,384 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 565 transitions, 10384 flow [2024-06-20 17:14:43,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:14:43,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:14:43,384 INFO 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] [2024-06-20 17:14:43,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-20 17:14:43,384 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:14:43,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:14:43,385 INFO L85 PathProgramCache]: Analyzing trace with hash 532576514, now seen corresponding path program 1 times [2024-06-20 17:14:43,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:14:43,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441169142] [2024-06-20 17:14:43,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:14:43,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:14:43,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:14:45,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:14:45,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:14:45,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441169142] [2024-06-20 17:14:45,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441169142] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:14:45,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:14:45,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:14:45,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094470914] [2024-06-20 17:14:45,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:14:45,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:14:45,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:14:45,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:14:45,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:14:45,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:14:45,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 565 transitions, 10384 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:14:45,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:14:45,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:14:45,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:14:48,332 INFO L124 PetriNetUnfolderBase]: 2971/4839 cut-off events. [2024-06-20 17:14:48,332 INFO L125 PetriNetUnfolderBase]: For 1316955/1316961 co-relation queries the response was YES. [2024-06-20 17:14:48,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57851 conditions, 4839 events. 2971/4839 cut-off events. For 1316955/1316961 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 29430 event pairs, 541 based on Foata normal form. 7/4845 useless extension candidates. Maximal degree in co-relation 57640. Up to 4293 conditions per place. [2024-06-20 17:14:48,399 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 461 selfloop transitions, 135 changer transitions 0/601 dead transitions. [2024-06-20 17:14:48,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 601 transitions, 12151 flow [2024-06-20 17:14:48,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:14:48,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:14:48,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 177 transitions. [2024-06-20 17:14:48,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38311688311688313 [2024-06-20 17:14:48,401 INFO L175 Difference]: Start difference. First operand has 436 places, 565 transitions, 10384 flow. Second operand 11 states and 177 transitions. [2024-06-20 17:14:48,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 601 transitions, 12151 flow [2024-06-20 17:14:53,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 601 transitions, 11570 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-20 17:14:53,887 INFO L231 Difference]: Finished difference. Result has 439 places, 571 transitions, 10367 flow [2024-06-20 17:14:53,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9803, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10367, PETRI_PLACES=439, PETRI_TRANSITIONS=571} [2024-06-20 17:14:53,888 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 396 predicate places. [2024-06-20 17:14:53,888 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 571 transitions, 10367 flow [2024-06-20 17:14:53,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:14:53,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:14:53,888 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:14:53,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-20 17:14:53,888 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:14:53,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:14:53,889 INFO L85 PathProgramCache]: Analyzing trace with hash 532576111, now seen corresponding path program 4 times [2024-06-20 17:14:53,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:14:53,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19656629] [2024-06-20 17:14:53,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:14:53,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:14:53,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:14:56,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:14:56,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:14:56,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19656629] [2024-06-20 17:14:56,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19656629] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:14:56,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:14:56,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:14:56,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303424637] [2024-06-20 17:14:56,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:14:56,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:14:56,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:14:56,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:14:56,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:14:56,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:14:56,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 571 transitions, 10367 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:14:56,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:14:56,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:14:56,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:14:58,905 INFO L124 PetriNetUnfolderBase]: 2976/4849 cut-off events. [2024-06-20 17:14:58,905 INFO L125 PetriNetUnfolderBase]: For 1331001/1331003 co-relation queries the response was YES. [2024-06-20 17:14:58,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58135 conditions, 4849 events. 2976/4849 cut-off events. For 1331001/1331003 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 29529 event pairs, 560 based on Foata normal form. 1/4848 useless extension candidates. Maximal degree in co-relation 57922. Up to 4059 conditions per place. [2024-06-20 17:14:58,970 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 377 selfloop transitions, 218 changer transitions 0/600 dead transitions. [2024-06-20 17:14:58,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 600 transitions, 12019 flow [2024-06-20 17:14:58,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:14:58,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:14:58,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-20 17:14:58,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-20 17:14:58,972 INFO L175 Difference]: Start difference. First operand has 439 places, 571 transitions, 10367 flow. Second operand 9 states and 155 transitions. [2024-06-20 17:14:58,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 600 transitions, 12019 flow [2024-06-20 17:15:03,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 600 transitions, 11713 flow, removed 77 selfloop flow, removed 7 redundant places. [2024-06-20 17:15:03,539 INFO L231 Difference]: Finished difference. Result has 441 places, 574 transitions, 10637 flow [2024-06-20 17:15:03,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10061, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=215, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10637, PETRI_PLACES=441, PETRI_TRANSITIONS=574} [2024-06-20 17:15:03,540 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 398 predicate places. [2024-06-20 17:15:03,540 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 574 transitions, 10637 flow [2024-06-20 17:15:03,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:15:03,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:15:03,540 INFO 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] [2024-06-20 17:15:03,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-20 17:15:03,541 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:15:03,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:15:03,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1728680169, now seen corresponding path program 9 times [2024-06-20 17:15:03,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:15:03,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545537342] [2024-06-20 17:15:03,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:15:03,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:15:03,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:15:06,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:15:06,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:15:06,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545537342] [2024-06-20 17:15:06,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545537342] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:15:06,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:15:06,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:15:06,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767482461] [2024-06-20 17:15:06,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:15:06,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:15:06,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:15:06,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:15:06,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:15:06,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:15:06,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 574 transitions, 10637 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:15:06,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:15:06,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:15:06,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:15:08,601 INFO L124 PetriNetUnfolderBase]: 2973/4848 cut-off events. [2024-06-20 17:15:08,601 INFO L125 PetriNetUnfolderBase]: For 1341250/1341252 co-relation queries the response was YES. [2024-06-20 17:15:08,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58436 conditions, 4848 events. 2973/4848 cut-off events. For 1341250/1341252 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 29469 event pairs, 536 based on Foata normal form. 1/4849 useless extension candidates. Maximal degree in co-relation 58222. Up to 4426 conditions per place. [2024-06-20 17:15:08,673 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 524 selfloop transitions, 67 changer transitions 0/596 dead transitions. [2024-06-20 17:15:08,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 596 transitions, 12143 flow [2024-06-20 17:15:08,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:15:08,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:15:08,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-20 17:15:08,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3862433862433862 [2024-06-20 17:15:08,674 INFO L175 Difference]: Start difference. First operand has 441 places, 574 transitions, 10637 flow. Second operand 9 states and 146 transitions. [2024-06-20 17:15:08,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 596 transitions, 12143 flow [2024-06-20 17:15:14,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 596 transitions, 11599 flow, removed 56 selfloop flow, removed 7 redundant places. [2024-06-20 17:15:14,336 INFO L231 Difference]: Finished difference. Result has 443 places, 574 transitions, 10233 flow [2024-06-20 17:15:14,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10093, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=507, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10233, PETRI_PLACES=443, PETRI_TRANSITIONS=574} [2024-06-20 17:15:14,337 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 400 predicate places. [2024-06-20 17:15:14,337 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 574 transitions, 10233 flow [2024-06-20 17:15:14,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:15:14,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:15:14,337 INFO 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] [2024-06-20 17:15:14,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-20 17:15:14,337 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:15:14,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:15:14,338 INFO L85 PathProgramCache]: Analyzing trace with hash 622489977, now seen corresponding path program 10 times [2024-06-20 17:15:14,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:15:14,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868200362] [2024-06-20 17:15:14,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:15:14,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:15:14,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:15:17,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:15:17,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:15:17,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868200362] [2024-06-20 17:15:17,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868200362] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:15:17,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:15:17,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:15:17,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171863130] [2024-06-20 17:15:17,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:15:17,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:15:17,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:15:17,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:15:17,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:15:17,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:15:17,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 574 transitions, 10233 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:15:17,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:15:17,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:15:17,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:15:19,573 INFO L124 PetriNetUnfolderBase]: 2970/4850 cut-off events. [2024-06-20 17:15:19,573 INFO L125 PetriNetUnfolderBase]: For 1346630/1346632 co-relation queries the response was YES. [2024-06-20 17:15:19,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57894 conditions, 4850 events. 2970/4850 cut-off events. For 1346630/1346632 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 29559 event pairs, 536 based on Foata normal form. 1/4851 useless extension candidates. Maximal degree in co-relation 57679. Up to 4423 conditions per place. [2024-06-20 17:15:19,642 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 524 selfloop transitions, 67 changer transitions 0/596 dead transitions. [2024-06-20 17:15:19,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 596 transitions, 11473 flow [2024-06-20 17:15:19,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:15:19,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:15:19,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 157 transitions. [2024-06-20 17:15:19,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3738095238095238 [2024-06-20 17:15:19,644 INFO L175 Difference]: Start difference. First operand has 443 places, 574 transitions, 10233 flow. Second operand 10 states and 157 transitions. [2024-06-20 17:15:19,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 596 transitions, 11473 flow [2024-06-20 17:15:25,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 596 transitions, 11309 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-20 17:15:25,634 INFO L231 Difference]: Finished difference. Result has 446 places, 574 transitions, 10209 flow [2024-06-20 17:15:25,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10069, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=507, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10209, PETRI_PLACES=446, PETRI_TRANSITIONS=574} [2024-06-20 17:15:25,635 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 403 predicate places. [2024-06-20 17:15:25,635 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 574 transitions, 10209 flow [2024-06-20 17:15:25,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:15:25,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:15:25,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:15:25,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-20 17:15:25,635 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:15:25,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:15:25,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1736304898, now seen corresponding path program 2 times [2024-06-20 17:15:25,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:15:25,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822726185] [2024-06-20 17:15:25,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:15:25,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:15:25,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:15:28,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:15:28,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:15:28,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822726185] [2024-06-20 17:15:28,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822726185] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:15:28,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:15:28,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:15:28,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840697370] [2024-06-20 17:15:28,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:15:28,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:15:28,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:15:28,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:15:28,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:15:28,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:15:28,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 574 transitions, 10209 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:15:28,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:15:28,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:15:28,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:15:30,495 INFO L124 PetriNetUnfolderBase]: 3017/4917 cut-off events. [2024-06-20 17:15:30,495 INFO L125 PetriNetUnfolderBase]: For 1416388/1416390 co-relation queries the response was YES. [2024-06-20 17:15:30,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59597 conditions, 4917 events. 3017/4917 cut-off events. For 1416388/1416390 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 30003 event pairs, 536 based on Foata normal form. 2/4919 useless extension candidates. Maximal degree in co-relation 59381. Up to 4400 conditions per place. [2024-06-20 17:15:30,561 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 518 selfloop transitions, 87 changer transitions 0/610 dead transitions. [2024-06-20 17:15:30,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 610 transitions, 12412 flow [2024-06-20 17:15:30,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:15:30,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:15:30,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 166 transitions. [2024-06-20 17:15:30,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3952380952380952 [2024-06-20 17:15:30,563 INFO L175 Difference]: Start difference. First operand has 446 places, 574 transitions, 10209 flow. Second operand 10 states and 166 transitions. [2024-06-20 17:15:30,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 610 transitions, 12412 flow [2024-06-20 17:15:36,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 610 transitions, 12266 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-20 17:15:36,717 INFO L231 Difference]: Finished difference. Result has 448 places, 585 transitions, 10584 flow [2024-06-20 17:15:36,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10063, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=490, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10584, PETRI_PLACES=448, PETRI_TRANSITIONS=585} [2024-06-20 17:15:36,718 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 405 predicate places. [2024-06-20 17:15:36,718 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 585 transitions, 10584 flow [2024-06-20 17:15:36,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:15:36,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:15:36,718 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:15:36,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-20 17:15:36,718 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:15:36,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:15:36,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1674715223, now seen corresponding path program 4 times [2024-06-20 17:15:36,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:15:36,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462031067] [2024-06-20 17:15:36,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:15:36,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:15:36,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:15:39,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:15:39,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:15:39,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462031067] [2024-06-20 17:15:39,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462031067] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:15:39,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:15:39,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:15:39,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704190720] [2024-06-20 17:15:39,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:15:39,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:15:39,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:15:39,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:15:39,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:15:39,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:15:39,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 585 transitions, 10584 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:15:39,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:15:39,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:15:39,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:15:41,028 INFO L124 PetriNetUnfolderBase]: 3027/4933 cut-off events. [2024-06-20 17:15:41,028 INFO L125 PetriNetUnfolderBase]: For 1440743/1440745 co-relation queries the response was YES. [2024-06-20 17:15:41,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60667 conditions, 4933 events. 3027/4933 cut-off events. For 1440743/1440745 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 30126 event pairs, 537 based on Foata normal form. 2/4935 useless extension candidates. Maximal degree in co-relation 60449. Up to 4503 conditions per place. [2024-06-20 17:15:41,114 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 542 selfloop transitions, 65 changer transitions 0/612 dead transitions. [2024-06-20 17:15:41,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 456 places, 612 transitions, 12013 flow [2024-06-20 17:15:41,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:15:41,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:15:41,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-20 17:15:41,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3862433862433862 [2024-06-20 17:15:41,115 INFO L175 Difference]: Start difference. First operand has 448 places, 585 transitions, 10584 flow. Second operand 9 states and 146 transitions. [2024-06-20 17:15:41,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 456 places, 612 transitions, 12013 flow [2024-06-20 17:15:46,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 612 transitions, 11710 flow, removed 98 selfloop flow, removed 6 redundant places. [2024-06-20 17:15:46,817 INFO L231 Difference]: Finished difference. Result has 451 places, 591 transitions, 10593 flow [2024-06-20 17:15:46,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10287, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=585, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=520, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10593, PETRI_PLACES=451, PETRI_TRANSITIONS=591} [2024-06-20 17:15:46,818 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 408 predicate places. [2024-06-20 17:15:46,818 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 591 transitions, 10593 flow [2024-06-20 17:15:46,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:15:46,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:15:46,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:15:46,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-20 17:15:46,819 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:15:46,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:15:46,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1735917615, now seen corresponding path program 5 times [2024-06-20 17:15:46,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:15:46,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925268253] [2024-06-20 17:15:46,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:15:46,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:15:46,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:15:49,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:15:49,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:15:49,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925268253] [2024-06-20 17:15:49,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925268253] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:15:49,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:15:49,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:15:49,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339610745] [2024-06-20 17:15:49,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:15:49,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:15:49,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:15:49,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:15:49,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:15:49,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:15:49,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 591 transitions, 10593 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:15:49,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:15:49,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:15:49,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:15:51,438 INFO L124 PetriNetUnfolderBase]: 3040/4955 cut-off events. [2024-06-20 17:15:51,438 INFO L125 PetriNetUnfolderBase]: For 1458028/1458030 co-relation queries the response was YES. [2024-06-20 17:15:51,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60995 conditions, 4955 events. 3040/4955 cut-off events. For 1458028/1458030 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 30281 event pairs, 536 based on Foata normal form. 1/4956 useless extension candidates. Maximal degree in co-relation 60775. Up to 4528 conditions per place. [2024-06-20 17:15:51,517 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 556 selfloop transitions, 59 changer transitions 0/620 dead transitions. [2024-06-20 17:15:51,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 620 transitions, 12367 flow [2024-06-20 17:15:51,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:15:51,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:15:51,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 157 transitions. [2024-06-20 17:15:51,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3738095238095238 [2024-06-20 17:15:51,519 INFO L175 Difference]: Start difference. First operand has 451 places, 591 transitions, 10593 flow. Second operand 10 states and 157 transitions. [2024-06-20 17:15:51,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 620 transitions, 12367 flow [2024-06-20 17:15:56,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 620 transitions, 12194 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-20 17:15:56,474 INFO L231 Difference]: Finished difference. Result has 455 places, 597 transitions, 10770 flow [2024-06-20 17:15:56,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10420, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=591, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=532, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10770, PETRI_PLACES=455, PETRI_TRANSITIONS=597} [2024-06-20 17:15:56,474 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 412 predicate places. [2024-06-20 17:15:56,475 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 597 transitions, 10770 flow [2024-06-20 17:15:56,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:15:56,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:15:56,475 INFO 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] [2024-06-20 17:15:56,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-20 17:15:56,475 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:15:56,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:15:56,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1736037771, now seen corresponding path program 5 times [2024-06-20 17:15:56,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:15:56,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547331373] [2024-06-20 17:15:56,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:15:56,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:15:56,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:15:58,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:15:58,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:15:58,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547331373] [2024-06-20 17:15:58,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547331373] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:15:58,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:15:58,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:15:58,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574730608] [2024-06-20 17:15:58,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:15:58,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:15:58,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:15:58,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:15:58,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:15:58,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:15:58,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 597 transitions, 10770 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:15:58,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:15:58,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:15:58,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:16:01,344 INFO L124 PetriNetUnfolderBase]: 3160/5140 cut-off events. [2024-06-20 17:16:01,345 INFO L125 PetriNetUnfolderBase]: For 1633375/1633377 co-relation queries the response was YES. [2024-06-20 17:16:01,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66149 conditions, 5140 events. 3160/5140 cut-off events. For 1633375/1633377 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 31551 event pairs, 542 based on Foata normal form. 2/5142 useless extension candidates. Maximal degree in co-relation 65927. Up to 4495 conditions per place. [2024-06-20 17:16:01,430 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 509 selfloop transitions, 136 changer transitions 0/650 dead transitions. [2024-06-20 17:16:01,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 650 transitions, 13648 flow [2024-06-20 17:16:01,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:16:01,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:16:01,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-20 17:16:01,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-20 17:16:01,432 INFO L175 Difference]: Start difference. First operand has 455 places, 597 transitions, 10770 flow. Second operand 10 states and 170 transitions. [2024-06-20 17:16:01,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 650 transitions, 13648 flow [2024-06-20 17:16:07,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 650 transitions, 13386 flow, removed 76 selfloop flow, removed 7 redundant places. [2024-06-20 17:16:07,523 INFO L231 Difference]: Finished difference. Result has 460 places, 621 transitions, 11777 flow [2024-06-20 17:16:07,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10508, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=466, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11777, PETRI_PLACES=460, PETRI_TRANSITIONS=621} [2024-06-20 17:16:07,523 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 417 predicate places. [2024-06-20 17:16:07,524 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 621 transitions, 11777 flow [2024-06-20 17:16:07,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:16:07,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:16:07,524 INFO 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] [2024-06-20 17:16:07,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-20 17:16:07,524 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:16:07,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:16:07,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1728685935, now seen corresponding path program 6 times [2024-06-20 17:16:07,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:16:07,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895716310] [2024-06-20 17:16:07,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:16:07,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:16:07,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:16:10,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:16:10,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:16:10,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895716310] [2024-06-20 17:16:10,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895716310] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:16:10,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:16:10,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:16:10,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218336063] [2024-06-20 17:16:10,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:16:10,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:16:10,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:16:10,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:16:10,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:16:10,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:16:10,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 621 transitions, 11777 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:16:10,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:16:10,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:16:10,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:16:12,423 INFO L124 PetriNetUnfolderBase]: 3173/5155 cut-off events. [2024-06-20 17:16:12,424 INFO L125 PetriNetUnfolderBase]: For 1676141/1676143 co-relation queries the response was YES. [2024-06-20 17:16:12,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67663 conditions, 5155 events. 3173/5155 cut-off events. For 1676141/1676143 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 31580 event pairs, 545 based on Foata normal form. 1/5156 useless extension candidates. Maximal degree in co-relation 67438. Up to 4695 conditions per place. [2024-06-20 17:16:12,500 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 567 selfloop transitions, 78 changer transitions 0/650 dead transitions. [2024-06-20 17:16:12,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 650 transitions, 13689 flow [2024-06-20 17:16:12,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:16:12,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:16:12,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 159 transitions. [2024-06-20 17:16:12,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37857142857142856 [2024-06-20 17:16:12,501 INFO L175 Difference]: Start difference. First operand has 460 places, 621 transitions, 11777 flow. Second operand 10 states and 159 transitions. [2024-06-20 17:16:12,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 650 transitions, 13689 flow [2024-06-20 17:16:19,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 463 places, 650 transitions, 13468 flow, removed 49 selfloop flow, removed 6 redundant places. [2024-06-20 17:16:19,062 INFO L231 Difference]: Finished difference. Result has 465 places, 627 transitions, 12027 flow [2024-06-20 17:16:19,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11556, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=621, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=543, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12027, PETRI_PLACES=465, PETRI_TRANSITIONS=627} [2024-06-20 17:16:19,063 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 422 predicate places. [2024-06-20 17:16:19,063 INFO L495 AbstractCegarLoop]: Abstraction has has 465 places, 627 transitions, 12027 flow [2024-06-20 17:16:19,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:16:19,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:16:19,063 INFO 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] [2024-06-20 17:16:19,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-20 17:16:19,064 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:16:19,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:16:19,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1728686338, now seen corresponding path program 3 times [2024-06-20 17:16:19,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:16:19,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313266817] [2024-06-20 17:16:19,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:16:19,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:16:19,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:16:21,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:16:21,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:16:21,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313266817] [2024-06-20 17:16:21,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313266817] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:16:21,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:16:21,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:16:21,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592298347] [2024-06-20 17:16:21,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:16:21,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:16:21,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:16:21,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:16:21,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:16:21,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:16:21,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 627 transitions, 12027 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:16:21,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:16:21,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:16:21,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:16:24,360 INFO L124 PetriNetUnfolderBase]: 3183/5173 cut-off events. [2024-06-20 17:16:24,360 INFO L125 PetriNetUnfolderBase]: For 1705894/1705896 co-relation queries the response was YES. [2024-06-20 17:16:24,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68043 conditions, 5173 events. 3183/5173 cut-off events. For 1705894/1705896 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 31730 event pairs, 547 based on Foata normal form. 2/5175 useless extension candidates. Maximal degree in co-relation 67815. Up to 4719 conditions per place. [2024-06-20 17:16:24,435 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 579 selfloop transitions, 69 changer transitions 0/653 dead transitions. [2024-06-20 17:16:24,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 653 transitions, 13538 flow [2024-06-20 17:16:24,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:16:24,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:16:24,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 159 transitions. [2024-06-20 17:16:24,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37857142857142856 [2024-06-20 17:16:24,436 INFO L175 Difference]: Start difference. First operand has 465 places, 627 transitions, 12027 flow. Second operand 10 states and 159 transitions. [2024-06-20 17:16:24,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 653 transitions, 13538 flow [2024-06-20 17:16:31,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 653 transitions, 13275 flow, removed 62 selfloop flow, removed 7 redundant places. [2024-06-20 17:16:31,109 INFO L231 Difference]: Finished difference. Result has 468 places, 631 transitions, 12075 flow [2024-06-20 17:16:31,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11764, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=627, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=558, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12075, PETRI_PLACES=468, PETRI_TRANSITIONS=631} [2024-06-20 17:16:31,109 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 425 predicate places. [2024-06-20 17:16:31,109 INFO L495 AbstractCegarLoop]: Abstraction has has 468 places, 631 transitions, 12075 flow [2024-06-20 17:16:31,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:16:31,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:16:31,110 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:16:31,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-20 17:16:31,110 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:16:31,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:16:31,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1682072670, now seen corresponding path program 4 times [2024-06-20 17:16:31,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:16:31,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602430967] [2024-06-20 17:16:31,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:16:31,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:16:31,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:16:33,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:16:33,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:16:33,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602430967] [2024-06-20 17:16:33,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602430967] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:16:33,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:16:33,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:16:33,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353044800] [2024-06-20 17:16:33,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:16:33,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:16:33,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:16:33,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:16:33,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:16:33,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:16:33,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 631 transitions, 12075 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:16:33,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:16:33,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:16:33,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:16:35,861 INFO L124 PetriNetUnfolderBase]: 3177/5163 cut-off events. [2024-06-20 17:16:35,861 INFO L125 PetriNetUnfolderBase]: For 1708737/1708739 co-relation queries the response was YES. [2024-06-20 17:16:35,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67744 conditions, 5163 events. 3177/5163 cut-off events. For 1708737/1708739 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 31671 event pairs, 546 based on Foata normal form. 2/5165 useless extension candidates. Maximal degree in co-relation 67515. Up to 4668 conditions per place. [2024-06-20 17:16:35,952 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 561 selfloop transitions, 91 changer transitions 0/657 dead transitions. [2024-06-20 17:16:35,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 657 transitions, 13602 flow [2024-06-20 17:16:35,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:16:35,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:16:35,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 162 transitions. [2024-06-20 17:16:35,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38571428571428573 [2024-06-20 17:16:35,954 INFO L175 Difference]: Start difference. First operand has 468 places, 631 transitions, 12075 flow. Second operand 10 states and 162 transitions. [2024-06-20 17:16:35,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 657 transitions, 13602 flow [2024-06-20 17:16:42,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 470 places, 657 transitions, 13342 flow, removed 70 selfloop flow, removed 7 redundant places. [2024-06-20 17:16:42,997 INFO L231 Difference]: Finished difference. Result has 471 places, 635 transitions, 12178 flow [2024-06-20 17:16:42,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11815, PETRI_DIFFERENCE_MINUEND_PLACES=461, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=631, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=540, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12178, PETRI_PLACES=471, PETRI_TRANSITIONS=635} [2024-06-20 17:16:42,998 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 428 predicate places. [2024-06-20 17:16:42,998 INFO L495 AbstractCegarLoop]: Abstraction has has 471 places, 635 transitions, 12178 flow [2024-06-20 17:16:42,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:16:42,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:16:42,998 INFO 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] [2024-06-20 17:16:42,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-20 17:16:42,999 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:16:42,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:16:42,999 INFO L85 PathProgramCache]: Analyzing trace with hash 760404791, now seen corresponding path program 7 times [2024-06-20 17:16:43,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:16:43,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775287648] [2024-06-20 17:16:43,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:16:43,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:16:43,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:16:45,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:16:45,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:16:45,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775287648] [2024-06-20 17:16:45,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775287648] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:16:45,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:16:45,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:16:45,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143167276] [2024-06-20 17:16:45,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:16:45,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:16:45,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:16:45,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:16:45,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:16:46,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:16:46,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 635 transitions, 12178 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:16:46,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:16:46,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:16:46,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:16:48,886 INFO L124 PetriNetUnfolderBase]: 3268/5306 cut-off events. [2024-06-20 17:16:48,887 INFO L125 PetriNetUnfolderBase]: For 1849021/1849023 co-relation queries the response was YES. [2024-06-20 17:16:48,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71803 conditions, 5306 events. 3268/5306 cut-off events. For 1849021/1849023 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 32677 event pairs, 539 based on Foata normal form. 1/5307 useless extension candidates. Maximal degree in co-relation 71573. Up to 4516 conditions per place. [2024-06-20 17:16:48,977 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 513 selfloop transitions, 166 changer transitions 0/684 dead transitions. [2024-06-20 17:16:48,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 684 transitions, 15258 flow [2024-06-20 17:16:48,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:16:48,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:16:48,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 185 transitions. [2024-06-20 17:16:48,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4004329004329004 [2024-06-20 17:16:48,978 INFO L175 Difference]: Start difference. First operand has 471 places, 635 transitions, 12178 flow. Second operand 11 states and 185 transitions. [2024-06-20 17:16:48,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 684 transitions, 15258 flow [2024-06-20 17:16:56,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 684 transitions, 14922 flow, removed 74 selfloop flow, removed 9 redundant places. [2024-06-20 17:16:57,002 INFO L231 Difference]: Finished difference. Result has 475 places, 652 transitions, 12910 flow [2024-06-20 17:16:57,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11842, PETRI_DIFFERENCE_MINUEND_PLACES=462, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=635, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=474, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12910, PETRI_PLACES=475, PETRI_TRANSITIONS=652} [2024-06-20 17:16:57,003 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 432 predicate places. [2024-06-20 17:16:57,003 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 652 transitions, 12910 flow [2024-06-20 17:16:57,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:16:57,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:16:57,003 INFO 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] [2024-06-20 17:16:57,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-20 17:16:57,004 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:16:57,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:16:57,004 INFO L85 PathProgramCache]: Analyzing trace with hash 676455481, now seen corresponding path program 8 times [2024-06-20 17:16:57,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:16:57,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573902423] [2024-06-20 17:16:57,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:16:57,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:16:57,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:16:59,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:16:59,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:16:59,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573902423] [2024-06-20 17:16:59,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573902423] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:16:59,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:16:59,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:16:59,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323635976] [2024-06-20 17:16:59,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:16:59,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:16:59,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:16:59,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:16:59,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:16:59,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:16:59,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 652 transitions, 12910 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:16:59,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:16:59,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:16:59,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:17:01,728 INFO L124 PetriNetUnfolderBase]: 3265/5308 cut-off events. [2024-06-20 17:17:01,728 INFO L125 PetriNetUnfolderBase]: For 1865551/1865553 co-relation queries the response was YES. [2024-06-20 17:17:01,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72564 conditions, 5308 events. 3265/5308 cut-off events. For 1865551/1865553 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 32757 event pairs, 563 based on Foata normal form. 1/5309 useless extension candidates. Maximal degree in co-relation 72331. Up to 4840 conditions per place. [2024-06-20 17:17:01,822 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 599 selfloop transitions, 70 changer transitions 0/674 dead transitions. [2024-06-20 17:17:01,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 484 places, 674 transitions, 14306 flow [2024-06-20 17:17:01,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:17:01,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:17:01,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 157 transitions. [2024-06-20 17:17:01,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3738095238095238 [2024-06-20 17:17:01,823 INFO L175 Difference]: Start difference. First operand has 475 places, 652 transitions, 12910 flow. Second operand 10 states and 157 transitions. [2024-06-20 17:17:01,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 484 places, 674 transitions, 14306 flow [2024-06-20 17:17:09,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 478 places, 674 transitions, 13929 flow, removed 157 selfloop flow, removed 6 redundant places. [2024-06-20 17:17:09,943 INFO L231 Difference]: Finished difference. Result has 479 places, 652 transitions, 12679 flow [2024-06-20 17:17:09,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12533, PETRI_DIFFERENCE_MINUEND_PLACES=469, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=652, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=582, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12679, PETRI_PLACES=479, PETRI_TRANSITIONS=652} [2024-06-20 17:17:09,944 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 436 predicate places. [2024-06-20 17:17:09,944 INFO L495 AbstractCegarLoop]: Abstraction has has 479 places, 652 transitions, 12679 flow [2024-06-20 17:17:09,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:17:09,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:17:09,944 INFO 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] [2024-06-20 17:17:09,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-20 17:17:09,944 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:17:09,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:17:09,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1429232873, now seen corresponding path program 7 times [2024-06-20 17:17:09,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:17:09,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410243184] [2024-06-20 17:17:09,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:17:09,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:17:09,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:17:12,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:17:12,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:17:12,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410243184] [2024-06-20 17:17:12,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410243184] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:17:12,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:17:12,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:17:12,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621799518] [2024-06-20 17:17:12,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:17:12,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:17:12,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:17:12,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:17:12,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:17:12,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:17:12,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 479 places, 652 transitions, 12679 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:17:12,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:17:12,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:17:12,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:17:14,962 INFO L124 PetriNetUnfolderBase]: 3273/5324 cut-off events. [2024-06-20 17:17:14,962 INFO L125 PetriNetUnfolderBase]: For 1900261/1900263 co-relation queries the response was YES. [2024-06-20 17:17:15,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72316 conditions, 5324 events. 3273/5324 cut-off events. For 1900261/1900263 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 32853 event pairs, 563 based on Foata normal form. 2/5326 useless extension candidates. Maximal degree in co-relation 72082. Up to 4828 conditions per place. [2024-06-20 17:17:15,058 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 603 selfloop transitions, 70 changer transitions 0/678 dead transitions. [2024-06-20 17:17:15,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 678 transitions, 14414 flow [2024-06-20 17:17:15,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:17:15,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:17:15,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-20 17:17:15,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-20 17:17:15,060 INFO L175 Difference]: Start difference. First operand has 479 places, 652 transitions, 12679 flow. Second operand 9 states and 144 transitions. [2024-06-20 17:17:15,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 678 transitions, 14414 flow Killed by 15