./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/thin002_power.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/thin002_power.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cde23df1 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/thin002_power.oepc.i ./goblint.2024-05-21_14-57-05.files/protection/thin002_power.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-cde23df-m [2024-06-14 13:37:13,202 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 13:37:13,244 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 13:37:13,253 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 13:37:13,254 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 13:37:13,275 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 13:37:13,278 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 13:37:13,278 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 13:37:13,278 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 13:37:13,282 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 13:37:13,282 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 13:37:13,282 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 13:37:13,282 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 13:37:13,283 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 13:37:13,284 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 13:37:13,284 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 13:37:13,284 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 13:37:13,284 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 13:37:13,284 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 13:37:13,285 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 13:37:13,286 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 13:37:13,286 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 13:37:13,286 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 13:37:13,286 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 13:37:13,287 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 13:37:13,287 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 13:37:13,287 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 13:37:13,287 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 13:37:13,288 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 13:37:13,288 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 13:37:13,289 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 13:37:13,289 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 13:37:13,289 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 13:37:13,289 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 13:37:13,289 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 13:37:13,289 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 13:37:13,290 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 13:37:13,290 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 13:37:13,290 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 13:37:13,290 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 13:37:13,290 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 13:37:13,291 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 13:37:13,291 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 13:37:13,291 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 13:37:13,528 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 13:37:13,551 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 13:37:13,554 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 13:37:13,555 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 13:37:13,556 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 13:37:13,557 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/thin002_power.oepc.i [2024-06-14 13:37:14,591 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 13:37:14,816 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 13:37:14,816 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/thin002_power.oepc.i [2024-06-14 13:37:14,828 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c29b9e454/33e00abfdd944a41b312cced0e3a0144/FLAGd2c422a73 [2024-06-14 13:37:14,841 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c29b9e454/33e00abfdd944a41b312cced0e3a0144 [2024-06-14 13:37:14,842 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 13:37:14,843 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 13:37:14,845 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/thin002_power.oepc.yml/witness.yml [2024-06-14 13:37:15,072 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 13:37:15,073 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 13:37:15,075 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 13:37:15,075 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 13:37:15,079 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 13:37:15,080 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 01:37:14" (1/2) ... [2024-06-14 13:37:15,081 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@317127d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:37:15, skipping insertion in model container [2024-06-14 13:37:15,081 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 01:37:14" (1/2) ... [2024-06-14 13:37:15,082 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@86d25ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:37:15, skipping insertion in model container [2024-06-14 13:37:15,082 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:37:15" (2/2) ... [2024-06-14 13:37:15,083 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@317127d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:37:15, skipping insertion in model container [2024-06-14 13:37:15,083 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:37:15" (2/2) ... [2024-06-14 13:37:15,083 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 13:37:15,239 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 13:37:15,243 INFO L97 edCorrectnessWitness]: Location invariant before [L864-L864] (((((((((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$r_buff0_thd4 == (_Bool)0) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || a$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || a$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || a$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || a$w_buff1 == 0)) && (! multithreaded || ((0 <= a$mem_tmp && a$mem_tmp <= 1) && (a$mem_tmp == 0 || a$mem_tmp == 1)))) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (((0 <= *__unbuffered_p0_EAX$read_delayed_var && *__unbuffered_p0_EAX$read_delayed_var <= 1) && __unbuffered_p0_EAX$read_delayed_var == & a) && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || a$w_buff0_used == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || a$w_buff0 == 0)) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || a$w_buff1_used == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) [2024-06-14 13:37:15,243 INFO L97 edCorrectnessWitness]: Location invariant before [L866-L866] (((((((((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$r_buff0_thd4 == (_Bool)0) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || a$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || a$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || a$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || a$w_buff1 == 0)) && (! multithreaded || ((0 <= a$mem_tmp && a$mem_tmp <= 1) && (a$mem_tmp == 0 || a$mem_tmp == 1)))) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! 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 == & a) && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || a$w_buff0_used == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || a$w_buff0 == 0)) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || a$w_buff1_used == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) [2024-06-14 13:37:15,244 INFO L97 edCorrectnessWitness]: Location invariant before [L869-L869] (((((((((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$r_buff0_thd4 == (_Bool)0) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || a$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || a$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || a$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || a$w_buff1 == 0)) && (! multithreaded || ((0 <= a$mem_tmp && a$mem_tmp <= 1) && (a$mem_tmp == 0 || a$mem_tmp == 1)))) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (((0 <= *__unbuffered_p0_EAX$read_delayed_var && *__unbuffered_p0_EAX$read_delayed_var <= 1) && __unbuffered_p0_EAX$read_delayed_var == & a) && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || a$w_buff0_used == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || a$w_buff0 == 0)) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || a$w_buff1_used == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) [2024-06-14 13:37:15,244 INFO L97 edCorrectnessWitness]: Location invariant before [L868-L868] (((((((((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$r_buff0_thd4 == (_Bool)0) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || a$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || a$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || a$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || a$w_buff1 == 0)) && (! multithreaded || ((0 <= a$mem_tmp && a$mem_tmp <= 1) && (a$mem_tmp == 0 || a$mem_tmp == 1)))) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! 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 == & a) && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || a$w_buff0_used == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || a$w_buff0 == 0)) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || a$w_buff1_used == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) [2024-06-14 13:37:15,244 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 13:37:15,245 INFO L106 edCorrectnessWitness]: ghost_update [L862-L862] multithreaded = 1; [2024-06-14 13:37:15,290 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 13:37:15,598 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 13:37:15,608 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 13:37:15,780 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 13:37:15,810 INFO L206 MainTranslator]: Completed translation [2024-06-14 13:37:15,811 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:37:15 WrapperNode [2024-06-14 13:37:15,811 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 13:37:15,812 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 13:37:15,812 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 13:37:15,813 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 13:37:15,818 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:37:15" (1/1) ... [2024-06-14 13:37:15,850 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:37:15" (1/1) ... [2024-06-14 13:37:15,899 INFO L138 Inliner]: procedures = 176, calls = 99, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 248 [2024-06-14 13:37:15,900 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 13:37:15,901 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 13:37:15,901 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 13:37:15,901 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 13:37:15,910 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:37:15" (1/1) ... [2024-06-14 13:37:15,910 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:37:15" (1/1) ... [2024-06-14 13:37:15,923 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:37:15" (1/1) ... [2024-06-14 13:37:15,973 INFO L175 MemorySlicer]: Split 49 memory accesses to 2 slices as follows [2, 47]. 96 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 5 writes are split as follows [0, 5]. [2024-06-14 13:37:16,000 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:37:15" (1/1) ... [2024-06-14 13:37:16,000 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:37:15" (1/1) ... [2024-06-14 13:37:16,010 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:37:15" (1/1) ... [2024-06-14 13:37:16,024 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:37:15" (1/1) ... [2024-06-14 13:37:16,026 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:37:15" (1/1) ... [2024-06-14 13:37:16,028 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:37:15" (1/1) ... [2024-06-14 13:37:16,031 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 13:37:16,032 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 13:37:16,032 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 13:37:16,032 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 13:37:16,032 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:37:15" (1/1) ... [2024-06-14 13:37:16,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 13:37:16,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 13:37:16,077 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) [2024-06-14 13:37:16,112 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 [2024-06-14 13:37:16,126 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-14 13:37:16,127 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-14 13:37:16,127 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-14 13:37:16,127 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-14 13:37:16,127 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 13:37:16,127 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 13:37:16,127 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 13:37:16,128 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 13:37:16,128 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 13:37:16,128 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 13:37:16,128 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 13:37:16,128 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 13:37:16,128 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-14 13:37:16,129 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-14 13:37:16,129 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 13:37:16,131 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-14 13:37:16,131 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 13:37:16,131 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 13:37:16,131 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 13:37:16,132 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-14 13:37:16,285 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 13:37:16,287 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 13:37:16,727 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 13:37:16,727 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 13:37:17,207 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 13:37:17,207 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 13:37:17,208 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 01:37:17 BoogieIcfgContainer [2024-06-14 13:37:17,208 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 13:37:17,210 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 13:37:17,210 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 13:37:17,212 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 13:37:17,213 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 01:37:14" (1/4) ... [2024-06-14 13:37:17,213 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bed3812 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 01:37:17, skipping insertion in model container [2024-06-14 13:37:17,213 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:37:15" (2/4) ... [2024-06-14 13:37:17,214 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bed3812 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 01:37:17, skipping insertion in model container [2024-06-14 13:37:17,214 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:37:15" (3/4) ... [2024-06-14 13:37:17,214 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bed3812 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 01:37:17, skipping insertion in model container [2024-06-14 13:37:17,215 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 01:37:17" (4/4) ... [2024-06-14 13:37:17,216 INFO L112 eAbstractionObserver]: Analyzing ICFG thin002_power.oepc.i [2024-06-14 13:37:17,230 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 13:37:17,230 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-14 13:37:17,230 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 13:37:17,297 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 13:37:17,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 68 places, 55 transitions, 126 flow [2024-06-14 13:37:17,366 INFO L124 PetriNetUnfolderBase]: 0/51 cut-off events. [2024-06-14 13:37:17,366 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 13:37:17,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64 conditions, 51 events. 0/51 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 72 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-14 13:37:17,368 INFO L82 GeneralOperation]: Start removeDead. Operand has 68 places, 55 transitions, 126 flow [2024-06-14 13:37:17,372 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 58 places, 45 transitions, 102 flow [2024-06-14 13:37:17,384 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 13:37:17,391 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;@6aab9bda, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 13:37:17,391 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-14 13:37:17,408 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 13:37:17,412 INFO L124 PetriNetUnfolderBase]: 0/7 cut-off events. [2024-06-14 13:37:17,412 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 13:37:17,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:37:17,414 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 13:37:17,414 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:37:17,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:37:17,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1174305407, now seen corresponding path program 1 times [2024-06-14 13:37:17,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:37:17,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376992653] [2024-06-14 13:37:17,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:37:17,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:37:17,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:37:19,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:37:19,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:37:19,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376992653] [2024-06-14 13:37:19,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376992653] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:37:19,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:37:19,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 13:37:19,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127381581] [2024-06-14 13:37:19,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:37:19,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 13:37:19,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:37:19,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 13:37:19,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 13:37:19,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 55 [2024-06-14 13:37:19,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 45 transitions, 102 flow. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:19,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:37:19,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 55 [2024-06-14 13:37:19,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:37:21,339 INFO L124 PetriNetUnfolderBase]: 4406/6337 cut-off events. [2024-06-14 13:37:21,339 INFO L125 PetriNetUnfolderBase]: For 102/102 co-relation queries the response was YES. [2024-06-14 13:37:21,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12685 conditions, 6337 events. 4406/6337 cut-off events. For 102/102 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 34650 event pairs, 3188 based on Foata normal form. 1/6203 useless extension candidates. Maximal degree in co-relation 12669. Up to 6114 conditions per place. [2024-06-14 13:37:21,375 INFO L140 encePairwiseOnDemand]: 46/55 looper letters, 47 selfloop transitions, 5 changer transitions 0/62 dead transitions. [2024-06-14 13:37:21,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 62 transitions, 249 flow [2024-06-14 13:37:21,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 13:37:21,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 13:37:21,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 98 transitions. [2024-06-14 13:37:21,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.593939393939394 [2024-06-14 13:37:21,386 INFO L175 Difference]: Start difference. First operand has 58 places, 45 transitions, 102 flow. Second operand 3 states and 98 transitions. [2024-06-14 13:37:21,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 62 transitions, 249 flow [2024-06-14 13:37:21,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 62 transitions, 242 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-14 13:37:21,394 INFO L231 Difference]: Finished difference. Result has 57 places, 49 transitions, 137 flow [2024-06-14 13:37:21,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=137, PETRI_PLACES=57, PETRI_TRANSITIONS=49} [2024-06-14 13:37:21,398 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, -1 predicate places. [2024-06-14 13:37:21,398 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 49 transitions, 137 flow [2024-06-14 13:37:21,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:21,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:37:21,399 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:37:21,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 13:37:21,400 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:37:21,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:37:21,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1068946592, now seen corresponding path program 1 times [2024-06-14 13:37:21,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:37:21,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858586007] [2024-06-14 13:37:21,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:37:21,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:37:21,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:37:24,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:37:24,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:37:24,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858586007] [2024-06-14 13:37:24,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858586007] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:37:24,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:37:24,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 13:37:24,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116534163] [2024-06-14 13:37:24,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:37:24,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 13:37:24,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:37:24,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 13:37:24,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-14 13:37:24,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 55 [2024-06-14 13:37:24,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 49 transitions, 137 flow. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:24,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:37:24,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 55 [2024-06-14 13:37:24,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:37:25,789 INFO L124 PetriNetUnfolderBase]: 4396/6308 cut-off events. [2024-06-14 13:37:25,789 INFO L125 PetriNetUnfolderBase]: For 1199/1209 co-relation queries the response was YES. [2024-06-14 13:37:25,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14564 conditions, 6308 events. 4396/6308 cut-off events. For 1199/1209 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 33975 event pairs, 2767 based on Foata normal form. 10/6313 useless extension candidates. Maximal degree in co-relation 14549. Up to 6073 conditions per place. [2024-06-14 13:37:25,840 INFO L140 encePairwiseOnDemand]: 45/55 looper letters, 60 selfloop transitions, 9 changer transitions 0/79 dead transitions. [2024-06-14 13:37:25,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 79 transitions, 353 flow [2024-06-14 13:37:25,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 13:37:25,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 13:37:25,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 129 transitions. [2024-06-14 13:37:25,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5863636363636363 [2024-06-14 13:37:25,847 INFO L175 Difference]: Start difference. First operand has 57 places, 49 transitions, 137 flow. Second operand 4 states and 129 transitions. [2024-06-14 13:37:25,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 79 transitions, 353 flow [2024-06-14 13:37:25,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 79 transitions, 348 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 13:37:25,853 INFO L231 Difference]: Finished difference. Result has 60 places, 53 transitions, 185 flow [2024-06-14 13:37:25,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=185, PETRI_PLACES=60, PETRI_TRANSITIONS=53} [2024-06-14 13:37:25,854 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 2 predicate places. [2024-06-14 13:37:25,855 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 53 transitions, 185 flow [2024-06-14 13:37:25,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:25,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:37:25,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:37:25,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 13:37:25,862 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:37:25,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:37:25,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1222392584, now seen corresponding path program 1 times [2024-06-14 13:37:25,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:37:25,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002609986] [2024-06-14 13:37:25,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:37:25,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:37:25,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:37:28,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:37:28,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:37:28,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002609986] [2024-06-14 13:37:28,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002609986] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:37:28,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:37:28,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 13:37:28,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227927931] [2024-06-14 13:37:28,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:37:28,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 13:37:28,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:37:28,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 13:37:28,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-14 13:37:28,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 55 [2024-06-14 13:37:28,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 53 transitions, 185 flow. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:28,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:37:28,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 55 [2024-06-14 13:37:28,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:37:30,716 INFO L124 PetriNetUnfolderBase]: 5573/7933 cut-off events. [2024-06-14 13:37:30,716 INFO L125 PetriNetUnfolderBase]: For 4121/4139 co-relation queries the response was YES. [2024-06-14 13:37:30,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20462 conditions, 7933 events. 5573/7933 cut-off events. For 4121/4139 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 42765 event pairs, 2919 based on Foata normal form. 16/7945 useless extension candidates. Maximal degree in co-relation 20445. Up to 7638 conditions per place. [2024-06-14 13:37:30,752 INFO L140 encePairwiseOnDemand]: 44/55 looper letters, 82 selfloop transitions, 13 changer transitions 0/104 dead transitions. [2024-06-14 13:37:30,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 104 transitions, 529 flow [2024-06-14 13:37:30,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:37:30,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:37:30,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 156 transitions. [2024-06-14 13:37:30,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5672727272727273 [2024-06-14 13:37:30,754 INFO L175 Difference]: Start difference. First operand has 60 places, 53 transitions, 185 flow. Second operand 5 states and 156 transitions. [2024-06-14 13:37:30,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 104 transitions, 529 flow [2024-06-14 13:37:30,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 104 transitions, 498 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-06-14 13:37:30,758 INFO L231 Difference]: Finished difference. Result has 65 places, 65 transitions, 281 flow [2024-06-14 13:37:30,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=281, PETRI_PLACES=65, PETRI_TRANSITIONS=65} [2024-06-14 13:37:30,758 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 7 predicate places. [2024-06-14 13:37:30,759 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 65 transitions, 281 flow [2024-06-14 13:37:30,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:30,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:37:30,759 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:37:30,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 13:37:30,759 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:37:30,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:37:30,760 INFO L85 PathProgramCache]: Analyzing trace with hash 2101812727, now seen corresponding path program 1 times [2024-06-14 13:37:30,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:37:30,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221075259] [2024-06-14 13:37:30,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:37:30,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:37:30,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:37:34,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:37:34,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:37:34,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221075259] [2024-06-14 13:37:34,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221075259] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:37:34,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:37:34,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:37:34,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111103916] [2024-06-14 13:37:34,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:37:34,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:37:34,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:37:34,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:37:34,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:37:34,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 55 [2024-06-14 13:37:34,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 65 transitions, 281 flow. Second operand has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:34,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:37:34,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 55 [2024-06-14 13:37:34,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:37:36,168 INFO L124 PetriNetUnfolderBase]: 5557/7913 cut-off events. [2024-06-14 13:37:36,168 INFO L125 PetriNetUnfolderBase]: For 7469/7514 co-relation queries the response was YES. [2024-06-14 13:37:36,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22654 conditions, 7913 events. 5557/7913 cut-off events. For 7469/7514 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 42755 event pairs, 2329 based on Foata normal form. 32/7941 useless extension candidates. Maximal degree in co-relation 22634. Up to 7560 conditions per place. [2024-06-14 13:37:36,250 INFO L140 encePairwiseOnDemand]: 44/55 looper letters, 91 selfloop transitions, 16 changer transitions 0/116 dead transitions. [2024-06-14 13:37:36,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 116 transitions, 627 flow [2024-06-14 13:37:36,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:37:36,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:37:36,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 181 transitions. [2024-06-14 13:37:36,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5484848484848485 [2024-06-14 13:37:36,255 INFO L175 Difference]: Start difference. First operand has 65 places, 65 transitions, 281 flow. Second operand 6 states and 181 transitions. [2024-06-14 13:37:36,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 116 transitions, 627 flow [2024-06-14 13:37:36,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 116 transitions, 619 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-14 13:37:36,262 INFO L231 Difference]: Finished difference. Result has 70 places, 67 transitions, 333 flow [2024-06-14 13:37:36,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=265, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=333, PETRI_PLACES=70, PETRI_TRANSITIONS=67} [2024-06-14 13:37:36,263 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 12 predicate places. [2024-06-14 13:37:36,264 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 67 transitions, 333 flow [2024-06-14 13:37:36,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:36,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:37:36,264 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:37:36,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 13:37:36,265 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:37:36,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:37:36,265 INFO L85 PathProgramCache]: Analyzing trace with hash 244744999, now seen corresponding path program 1 times [2024-06-14 13:37:36,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:37:36,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960500318] [2024-06-14 13:37:36,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:37:36,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:37:36,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:37:38,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:37:38,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:37:38,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960500318] [2024-06-14 13:37:38,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960500318] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:37:38,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:37:38,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:37:38,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383028138] [2024-06-14 13:37:38,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:37:38,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:37:38,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:37:38,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:37:38,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:37:38,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 55 [2024-06-14 13:37:38,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 67 transitions, 333 flow. Second operand has 7 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:38,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:37:38,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 55 [2024-06-14 13:37:38,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:37:41,101 INFO L124 PetriNetUnfolderBase]: 6976/9834 cut-off events. [2024-06-14 13:37:41,101 INFO L125 PetriNetUnfolderBase]: For 14047/14073 co-relation queries the response was YES. [2024-06-14 13:37:41,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29912 conditions, 9834 events. 6976/9834 cut-off events. For 14047/14073 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 52924 event pairs, 3445 based on Foata normal form. 13/9841 useless extension candidates. Maximal degree in co-relation 29889. Up to 9532 conditions per place. [2024-06-14 13:37:41,140 INFO L140 encePairwiseOnDemand]: 45/55 looper letters, 80 selfloop transitions, 12 changer transitions 0/100 dead transitions. [2024-06-14 13:37:41,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 100 transitions, 637 flow [2024-06-14 13:37:41,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:37:41,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:37:41,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2024-06-14 13:37:41,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4727272727272727 [2024-06-14 13:37:41,143 INFO L175 Difference]: Start difference. First operand has 70 places, 67 transitions, 333 flow. Second operand 5 states and 130 transitions. [2024-06-14 13:37:41,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 100 transitions, 637 flow [2024-06-14 13:37:41,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 100 transitions, 589 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-14 13:37:41,148 INFO L231 Difference]: Finished difference. Result has 72 places, 77 transitions, 406 flow [2024-06-14 13:37:41,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=291, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=406, PETRI_PLACES=72, PETRI_TRANSITIONS=77} [2024-06-14 13:37:41,150 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 14 predicate places. [2024-06-14 13:37:41,151 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 77 transitions, 406 flow [2024-06-14 13:37:41,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:41,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:37:41,151 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:37:41,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 13:37:41,151 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:37:41,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:37:41,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1197107440, now seen corresponding path program 1 times [2024-06-14 13:37:41,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:37:41,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101837007] [2024-06-14 13:37:41,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:37:41,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:37:41,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:37:45,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:37:45,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:37:45,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101837007] [2024-06-14 13:37:45,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101837007] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:37:45,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:37:45,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:37:45,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543437895] [2024-06-14 13:37:45,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:37:45,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:37:45,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:37:45,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:37:45,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:37:45,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 55 [2024-06-14 13:37:45,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 77 transitions, 406 flow. Second operand has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:45,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:37:45,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 55 [2024-06-14 13:37:45,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:37:48,041 INFO L124 PetriNetUnfolderBase]: 6834/9677 cut-off events. [2024-06-14 13:37:48,042 INFO L125 PetriNetUnfolderBase]: For 21503/21653 co-relation queries the response was YES. [2024-06-14 13:37:48,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32972 conditions, 9677 events. 6834/9677 cut-off events. For 21503/21653 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 53036 event pairs, 3028 based on Foata normal form. 49/9693 useless extension candidates. Maximal degree in co-relation 32946. Up to 9201 conditions per place. [2024-06-14 13:37:48,087 INFO L140 encePairwiseOnDemand]: 43/55 looper letters, 92 selfloop transitions, 33 changer transitions 0/136 dead transitions. [2024-06-14 13:37:48,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 136 transitions, 874 flow [2024-06-14 13:37:48,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:37:48,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:37:48,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 199 transitions. [2024-06-14 13:37:48,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5168831168831168 [2024-06-14 13:37:48,089 INFO L175 Difference]: Start difference. First operand has 72 places, 77 transitions, 406 flow. Second operand 7 states and 199 transitions. [2024-06-14 13:37:48,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 136 transitions, 874 flow [2024-06-14 13:37:48,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 136 transitions, 862 flow, removed 5 selfloop flow, removed 1 redundant places. [2024-06-14 13:37:48,096 INFO L231 Difference]: Finished difference. Result has 78 places, 85 transitions, 543 flow [2024-06-14 13:37:48,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=394, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=543, PETRI_PLACES=78, PETRI_TRANSITIONS=85} [2024-06-14 13:37:48,097 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 20 predicate places. [2024-06-14 13:37:48,097 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 85 transitions, 543 flow [2024-06-14 13:37:48,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:48,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:37:48,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:37:48,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 13:37:48,098 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:37:48,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:37:48,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1196987470, now seen corresponding path program 2 times [2024-06-14 13:37:48,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:37:48,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093495352] [2024-06-14 13:37:48,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:37:48,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:37:48,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:37:51,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:37:51,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:37:51,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093495352] [2024-06-14 13:37:51,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093495352] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:37:51,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:37:51,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:37:51,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125636860] [2024-06-14 13:37:51,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:37:51,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:37:51,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:37:51,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:37:51,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:37:51,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 55 [2024-06-14 13:37:51,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 85 transitions, 543 flow. Second operand has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:51,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:37:51,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 55 [2024-06-14 13:37:51,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:37:54,171 INFO L124 PetriNetUnfolderBase]: 6799/9644 cut-off events. [2024-06-14 13:37:54,172 INFO L125 PetriNetUnfolderBase]: For 31019/31238 co-relation queries the response was YES. [2024-06-14 13:37:54,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35810 conditions, 9644 events. 6799/9644 cut-off events. For 31019/31238 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 53028 event pairs, 3036 based on Foata normal form. 89/9698 useless extension candidates. Maximal degree in co-relation 35781. Up to 9214 conditions per place. [2024-06-14 13:37:54,234 INFO L140 encePairwiseOnDemand]: 43/55 looper letters, 96 selfloop transitions, 30 changer transitions 0/137 dead transitions. [2024-06-14 13:37:54,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 137 transitions, 973 flow [2024-06-14 13:37:54,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:37:54,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:37:54,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 191 transitions. [2024-06-14 13:37:54,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4961038961038961 [2024-06-14 13:37:54,236 INFO L175 Difference]: Start difference. First operand has 78 places, 85 transitions, 543 flow. Second operand 7 states and 191 transitions. [2024-06-14 13:37:54,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 137 transitions, 973 flow [2024-06-14 13:37:54,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 137 transitions, 919 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-14 13:37:54,254 INFO L231 Difference]: Finished difference. Result has 82 places, 93 transitions, 638 flow [2024-06-14 13:37:54,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=493, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=638, PETRI_PLACES=82, PETRI_TRANSITIONS=93} [2024-06-14 13:37:54,254 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 24 predicate places. [2024-06-14 13:37:54,255 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 93 transitions, 638 flow [2024-06-14 13:37:54,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:54,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:37:54,255 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:37:54,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 13:37:54,255 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:37:54,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:37:54,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1196987284, now seen corresponding path program 1 times [2024-06-14 13:37:54,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:37:54,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920303010] [2024-06-14 13:37:54,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:37:54,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:37:54,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:37:57,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:37:57,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:37:57,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920303010] [2024-06-14 13:37:57,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920303010] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:37:57,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:37:57,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:37:57,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361665338] [2024-06-14 13:37:57,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:37:57,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:37:57,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:37:57,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:37:57,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:37:57,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 55 [2024-06-14 13:37:57,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 93 transitions, 638 flow. Second operand has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:57,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:37:57,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 55 [2024-06-14 13:37:57,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:38:00,601 INFO L124 PetriNetUnfolderBase]: 7141/10090 cut-off events. [2024-06-14 13:38:00,601 INFO L125 PetriNetUnfolderBase]: For 33324/33374 co-relation queries the response was YES. [2024-06-14 13:38:00,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36949 conditions, 10090 events. 7141/10090 cut-off events. For 33324/33374 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 54423 event pairs, 3210 based on Foata normal form. 26/10107 useless extension candidates. Maximal degree in co-relation 36918. Up to 9639 conditions per place. [2024-06-14 13:38:00,644 INFO L140 encePairwiseOnDemand]: 43/55 looper letters, 123 selfloop transitions, 28 changer transitions 0/159 dead transitions. [2024-06-14 13:38:00,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 159 transitions, 1236 flow [2024-06-14 13:38:00,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:38:00,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:38:00,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 190 transitions. [2024-06-14 13:38:00,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4935064935064935 [2024-06-14 13:38:00,646 INFO L175 Difference]: Start difference. First operand has 82 places, 93 transitions, 638 flow. Second operand 7 states and 190 transitions. [2024-06-14 13:38:00,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 159 transitions, 1236 flow [2024-06-14 13:38:00,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 159 transitions, 1134 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-14 13:38:00,663 INFO L231 Difference]: Finished difference. Result has 87 places, 110 transitions, 774 flow [2024-06-14 13:38:00,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=555, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=774, PETRI_PLACES=87, PETRI_TRANSITIONS=110} [2024-06-14 13:38:00,665 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 29 predicate places. [2024-06-14 13:38:00,665 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 110 transitions, 774 flow [2024-06-14 13:38:00,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:00,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:38:00,665 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:38:00,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 13:38:00,665 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:38:00,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:38:00,666 INFO L85 PathProgramCache]: Analyzing trace with hash -164549110, now seen corresponding path program 2 times [2024-06-14 13:38:00,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:38:00,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006549946] [2024-06-14 13:38:00,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:38:00,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:38:00,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:38:03,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:38:03,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:38:03,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006549946] [2024-06-14 13:38:03,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006549946] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:38:03,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:38:03,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:38:03,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2632412] [2024-06-14 13:38:03,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:38:03,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:38:03,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:38:03,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:38:03,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:38:03,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 55 [2024-06-14 13:38:03,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 110 transitions, 774 flow. Second operand has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:03,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:38:03,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 55 [2024-06-14 13:38:03,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:38:06,502 INFO L124 PetriNetUnfolderBase]: 7168/10127 cut-off events. [2024-06-14 13:38:06,502 INFO L125 PetriNetUnfolderBase]: For 41776/41859 co-relation queries the response was YES. [2024-06-14 13:38:06,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39669 conditions, 10127 events. 7168/10127 cut-off events. For 41776/41859 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 54728 event pairs, 3210 based on Foata normal form. 39/10157 useless extension candidates. Maximal degree in co-relation 39635. Up to 9667 conditions per place. [2024-06-14 13:38:06,563 INFO L140 encePairwiseOnDemand]: 44/55 looper letters, 114 selfloop transitions, 32 changer transitions 0/154 dead transitions. [2024-06-14 13:38:06,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 154 transitions, 1254 flow [2024-06-14 13:38:06,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:38:06,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:38:06,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 165 transitions. [2024-06-14 13:38:06,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-14 13:38:06,565 INFO L175 Difference]: Start difference. First operand has 87 places, 110 transitions, 774 flow. Second operand 6 states and 165 transitions. [2024-06-14 13:38:06,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 154 transitions, 1254 flow [2024-06-14 13:38:06,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 154 transitions, 1206 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-14 13:38:06,618 INFO L231 Difference]: Finished difference. Result has 91 places, 115 transitions, 867 flow [2024-06-14 13:38:06,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=728, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=867, PETRI_PLACES=91, PETRI_TRANSITIONS=115} [2024-06-14 13:38:06,619 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 33 predicate places. [2024-06-14 13:38:06,619 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 115 transitions, 867 flow [2024-06-14 13:38:06,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:06,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:38:06,622 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:38:06,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 13:38:06,622 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:38:06,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:38:06,622 INFO L85 PathProgramCache]: Analyzing trace with hash -164311960, now seen corresponding path program 3 times [2024-06-14 13:38:06,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:38:06,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600019623] [2024-06-14 13:38:06,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:38:06,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:38:06,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:38:09,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:38:09,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:38:09,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600019623] [2024-06-14 13:38:09,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600019623] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:38:09,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:38:09,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:38:09,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463578727] [2024-06-14 13:38:09,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:38:09,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:38:09,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:38:09,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:38:09,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:38:09,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 55 [2024-06-14 13:38:09,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 115 transitions, 867 flow. Second operand has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:09,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:38:09,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 55 [2024-06-14 13:38:09,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:38:11,745 INFO L124 PetriNetUnfolderBase]: 7159/10129 cut-off events. [2024-06-14 13:38:11,745 INFO L125 PetriNetUnfolderBase]: For 47912/48240 co-relation queries the response was YES. [2024-06-14 13:38:11,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40143 conditions, 10129 events. 7159/10129 cut-off events. For 47912/48240 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 54812 event pairs, 3245 based on Foata normal form. 71/10183 useless extension candidates. Maximal degree in co-relation 40107. Up to 9658 conditions per place. [2024-06-14 13:38:11,801 INFO L140 encePairwiseOnDemand]: 44/55 looper letters, 108 selfloop transitions, 32 changer transitions 0/148 dead transitions. [2024-06-14 13:38:11,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 148 transitions, 1236 flow [2024-06-14 13:38:11,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:38:11,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:38:11,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-14 13:38:11,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47575757575757577 [2024-06-14 13:38:11,803 INFO L175 Difference]: Start difference. First operand has 91 places, 115 transitions, 867 flow. Second operand 6 states and 157 transitions. [2024-06-14 13:38:11,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 148 transitions, 1236 flow [2024-06-14 13:38:11,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 148 transitions, 1160 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-14 13:38:11,846 INFO L231 Difference]: Finished difference. Result has 93 places, 116 transitions, 874 flow [2024-06-14 13:38:11,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=792, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=874, PETRI_PLACES=93, PETRI_TRANSITIONS=116} [2024-06-14 13:38:11,847 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 35 predicate places. [2024-06-14 13:38:11,847 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 116 transitions, 874 flow [2024-06-14 13:38:11,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:11,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:38:11,848 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:38:11,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 13:38:11,848 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:38:11,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:38:11,848 INFO L85 PathProgramCache]: Analyzing trace with hash -147312642, now seen corresponding path program 3 times [2024-06-14 13:38:11,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:38:11,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332067543] [2024-06-14 13:38:11,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:38:11,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:38:11,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:38:14,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:38:14,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:38:14,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332067543] [2024-06-14 13:38:14,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332067543] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:38:14,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:38:14,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:38:14,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677051384] [2024-06-14 13:38:14,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:38:14,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:38:14,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:38:14,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:38:14,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:38:15,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 55 [2024-06-14 13:38:15,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 116 transitions, 874 flow. Second operand has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:15,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:38:15,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 55 [2024-06-14 13:38:15,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:38:17,925 INFO L124 PetriNetUnfolderBase]: 7143/10116 cut-off events. [2024-06-14 13:38:17,925 INFO L125 PetriNetUnfolderBase]: For 47027/47128 co-relation queries the response was YES. [2024-06-14 13:38:17,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39991 conditions, 10116 events. 7143/10116 cut-off events. For 47027/47128 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 55025 event pairs, 2919 based on Foata normal form. 39/10145 useless extension candidates. Maximal degree in co-relation 39955. Up to 9518 conditions per place. [2024-06-14 13:38:17,973 INFO L140 encePairwiseOnDemand]: 43/55 looper letters, 103 selfloop transitions, 45 changer transitions 0/156 dead transitions. [2024-06-14 13:38:17,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 156 transitions, 1270 flow [2024-06-14 13:38:17,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:38:17,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:38:17,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 168 transitions. [2024-06-14 13:38:17,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.509090909090909 [2024-06-14 13:38:17,976 INFO L175 Difference]: Start difference. First operand has 93 places, 116 transitions, 874 flow. Second operand 6 states and 168 transitions. [2024-06-14 13:38:17,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 156 transitions, 1270 flow [2024-06-14 13:38:18,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 156 transitions, 1202 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-14 13:38:18,020 INFO L231 Difference]: Finished difference. Result has 96 places, 116 transitions, 920 flow [2024-06-14 13:38:18,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=806, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=920, PETRI_PLACES=96, PETRI_TRANSITIONS=116} [2024-06-14 13:38:18,020 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 38 predicate places. [2024-06-14 13:38:18,021 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 116 transitions, 920 flow [2024-06-14 13:38:18,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:18,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:38:18,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:38:18,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 13:38:18,021 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:38:18,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:38:18,022 INFO L85 PathProgramCache]: Analyzing trace with hash -164303032, now seen corresponding path program 1 times [2024-06-14 13:38:18,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:38:18,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600377188] [2024-06-14 13:38:18,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:38:18,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:38:18,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:38:20,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:38:20,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:38:20,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600377188] [2024-06-14 13:38:20,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600377188] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:38:20,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:38:20,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:38:20,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715594615] [2024-06-14 13:38:20,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:38:20,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:38:20,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:38:20,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:38:20,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:38:20,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 55 [2024-06-14 13:38:20,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 116 transitions, 920 flow. Second operand has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:20,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:38:20,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 55 [2024-06-14 13:38:20,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:38:22,998 INFO L124 PetriNetUnfolderBase]: 7128/10077 cut-off events. [2024-06-14 13:38:22,999 INFO L125 PetriNetUnfolderBase]: For 54483/54575 co-relation queries the response was YES. [2024-06-14 13:38:23,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40732 conditions, 10077 events. 7128/10077 cut-off events. For 54483/54575 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 54406 event pairs, 3074 based on Foata normal form. 35/10106 useless extension candidates. Maximal degree in co-relation 40694. Up to 9700 conditions per place. [2024-06-14 13:38:23,045 INFO L140 encePairwiseOnDemand]: 45/55 looper letters, 129 selfloop transitions, 15 changer transitions 0/152 dead transitions. [2024-06-14 13:38:23,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 152 transitions, 1317 flow [2024-06-14 13:38:23,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:38:23,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:38:23,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-14 13:38:23,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4696969696969697 [2024-06-14 13:38:23,048 INFO L175 Difference]: Start difference. First operand has 96 places, 116 transitions, 920 flow. Second operand 6 states and 155 transitions. [2024-06-14 13:38:23,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 152 transitions, 1317 flow [2024-06-14 13:38:23,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 152 transitions, 1221 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-14 13:38:23,102 INFO L231 Difference]: Finished difference. Result has 97 places, 119 transitions, 896 flow [2024-06-14 13:38:23,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=824, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=896, PETRI_PLACES=97, PETRI_TRANSITIONS=119} [2024-06-14 13:38:23,103 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 39 predicate places. [2024-06-14 13:38:23,103 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 119 transitions, 896 flow [2024-06-14 13:38:23,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:23,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:38:23,103 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:38:23,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 13:38:23,104 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:38:23,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:38:23,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1544377482, now seen corresponding path program 1 times [2024-06-14 13:38:23,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:38:23,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149251645] [2024-06-14 13:38:23,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:38:23,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:38:23,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:38:26,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:38:26,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:38:26,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149251645] [2024-06-14 13:38:26,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149251645] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:38:26,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:38:26,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:38:26,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50856663] [2024-06-14 13:38:26,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:38:26,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:38:26,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:38:26,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:38:26,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:38:26,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 55 [2024-06-14 13:38:26,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 119 transitions, 896 flow. Second operand has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:26,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:38:26,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 55 [2024-06-14 13:38:26,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:38:30,129 INFO L124 PetriNetUnfolderBase]: 7155/10121 cut-off events. [2024-06-14 13:38:30,129 INFO L125 PetriNetUnfolderBase]: For 56015/56098 co-relation queries the response was YES. [2024-06-14 13:38:30,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41919 conditions, 10121 events. 7155/10121 cut-off events. For 56015/56098 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 54803 event pairs, 3023 based on Foata normal form. 41/10154 useless extension candidates. Maximal degree in co-relation 41880. Up to 9488 conditions per place. [2024-06-14 13:38:30,178 INFO L140 encePairwiseOnDemand]: 42/55 looper letters, 143 selfloop transitions, 50 changer transitions 0/201 dead transitions. [2024-06-14 13:38:30,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 201 transitions, 1659 flow [2024-06-14 13:38:30,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:38:30,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:38:30,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 221 transitions. [2024-06-14 13:38:30,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5022727272727273 [2024-06-14 13:38:30,180 INFO L175 Difference]: Start difference. First operand has 97 places, 119 transitions, 896 flow. Second operand 8 states and 221 transitions. [2024-06-14 13:38:30,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 201 transitions, 1659 flow [2024-06-14 13:38:30,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 201 transitions, 1613 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-14 13:38:30,222 INFO L231 Difference]: Finished difference. Result has 103 places, 138 transitions, 1163 flow [2024-06-14 13:38:30,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=850, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1163, PETRI_PLACES=103, PETRI_TRANSITIONS=138} [2024-06-14 13:38:30,223 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 45 predicate places. [2024-06-14 13:38:30,223 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 138 transitions, 1163 flow [2024-06-14 13:38:30,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:30,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:38:30,224 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:38:30,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 13:38:30,224 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:38:30,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:38:30,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1270913752, now seen corresponding path program 2 times [2024-06-14 13:38:30,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:38:30,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76263998] [2024-06-14 13:38:30,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:38:30,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:38:30,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:38:34,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:38:34,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:38:34,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76263998] [2024-06-14 13:38:34,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76263998] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:38:34,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:38:34,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:38:34,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688180320] [2024-06-14 13:38:34,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:38:34,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:38:34,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:38:34,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:38:34,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:38:34,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 55 [2024-06-14 13:38:34,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 138 transitions, 1163 flow. Second operand has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:34,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:38:34,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 55 [2024-06-14 13:38:34,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:38:37,376 INFO L124 PetriNetUnfolderBase]: 7218/10227 cut-off events. [2024-06-14 13:38:37,377 INFO L125 PetriNetUnfolderBase]: For 69015/69093 co-relation queries the response was YES. [2024-06-14 13:38:37,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45236 conditions, 10227 events. 7218/10227 cut-off events. For 69015/69093 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 55437 event pairs, 3023 based on Foata normal form. 41/10260 useless extension candidates. Maximal degree in co-relation 45194. Up to 9679 conditions per place. [2024-06-14 13:38:37,437 INFO L140 encePairwiseOnDemand]: 42/55 looper letters, 170 selfloop transitions, 45 changer transitions 0/223 dead transitions. [2024-06-14 13:38:37,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 223 transitions, 1956 flow [2024-06-14 13:38:37,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:38:37,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:38:37,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 265 transitions. [2024-06-14 13:38:37,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4818181818181818 [2024-06-14 13:38:37,449 INFO L175 Difference]: Start difference. First operand has 103 places, 138 transitions, 1163 flow. Second operand 10 states and 265 transitions. [2024-06-14 13:38:37,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 223 transitions, 1956 flow [2024-06-14 13:38:37,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 223 transitions, 1869 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-14 13:38:37,509 INFO L231 Difference]: Finished difference. Result has 111 places, 148 transitions, 1304 flow [2024-06-14 13:38:37,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1090, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1304, PETRI_PLACES=111, PETRI_TRANSITIONS=148} [2024-06-14 13:38:37,510 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 53 predicate places. [2024-06-14 13:38:37,510 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 148 transitions, 1304 flow [2024-06-14 13:38:37,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:37,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:38:37,510 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:38:37,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 13:38:37,511 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:38:37,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:38:37,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1548096552, now seen corresponding path program 3 times [2024-06-14 13:38:37,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:38:37,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847780999] [2024-06-14 13:38:37,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:38:37,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:38:37,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:38:41,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:38:41,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:38:41,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847780999] [2024-06-14 13:38:41,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847780999] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:38:41,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:38:41,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:38:41,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794570371] [2024-06-14 13:38:41,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:38:41,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:38:41,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:38:41,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:38:41,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:38:41,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 55 [2024-06-14 13:38:41,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 148 transitions, 1304 flow. Second operand has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:41,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:38:41,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 55 [2024-06-14 13:38:41,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:38:44,240 INFO L124 PetriNetUnfolderBase]: 7209/10215 cut-off events. [2024-06-14 13:38:44,240 INFO L125 PetriNetUnfolderBase]: For 76896/76974 co-relation queries the response was YES. [2024-06-14 13:38:44,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46096 conditions, 10215 events. 7209/10215 cut-off events. For 76896/76974 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 55526 event pairs, 3023 based on Foata normal form. 41/10248 useless extension candidates. Maximal degree in co-relation 46051. Up to 9670 conditions per place. [2024-06-14 13:38:44,316 INFO L140 encePairwiseOnDemand]: 42/55 looper letters, 150 selfloop transitions, 44 changer transitions 0/202 dead transitions. [2024-06-14 13:38:44,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 202 transitions, 1827 flow [2024-06-14 13:38:44,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:38:44,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:38:44,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 214 transitions. [2024-06-14 13:38:44,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4863636363636364 [2024-06-14 13:38:44,318 INFO L175 Difference]: Start difference. First operand has 111 places, 148 transitions, 1304 flow. Second operand 8 states and 214 transitions. [2024-06-14 13:38:44,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 202 transitions, 1827 flow [2024-06-14 13:38:44,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 202 transitions, 1742 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-14 13:38:44,408 INFO L231 Difference]: Finished difference. Result has 114 places, 148 transitions, 1318 flow [2024-06-14 13:38:44,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1219, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1318, PETRI_PLACES=114, PETRI_TRANSITIONS=148} [2024-06-14 13:38:44,409 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 56 predicate places. [2024-06-14 13:38:44,409 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 148 transitions, 1318 flow [2024-06-14 13:38:44,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:44,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:38:44,410 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:38:44,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 13:38:44,410 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:38:44,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:38:44,410 INFO L85 PathProgramCache]: Analyzing trace with hash -798701192, now seen corresponding path program 4 times [2024-06-14 13:38:44,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:38:44,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670853022] [2024-06-14 13:38:44,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:38:44,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:38:44,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:38:47,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:38:47,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:38:47,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670853022] [2024-06-14 13:38:47,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670853022] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:38:47,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:38:47,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:38:47,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622218307] [2024-06-14 13:38:47,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:38:47,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:38:47,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:38:47,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:38:47,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:38:48,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 55 [2024-06-14 13:38:48,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 148 transitions, 1318 flow. Second operand has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:48,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:38:48,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 55 [2024-06-14 13:38:48,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:38:51,018 INFO L124 PetriNetUnfolderBase]: 7236/10275 cut-off events. [2024-06-14 13:38:51,018 INFO L125 PetriNetUnfolderBase]: For 87263/87800 co-relation queries the response was YES. [2024-06-14 13:38:51,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47228 conditions, 10275 events. 7236/10275 cut-off events. For 87263/87800 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 56108 event pairs, 3055 based on Foata normal form. 136/10394 useless extension candidates. Maximal degree in co-relation 47181. Up to 9610 conditions per place. [2024-06-14 13:38:51,088 INFO L140 encePairwiseOnDemand]: 42/55 looper letters, 153 selfloop transitions, 59 changer transitions 0/220 dead transitions. [2024-06-14 13:38:51,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 220 transitions, 2049 flow [2024-06-14 13:38:51,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:38:51,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:38:51,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 240 transitions. [2024-06-14 13:38:51,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48484848484848486 [2024-06-14 13:38:51,090 INFO L175 Difference]: Start difference. First operand has 114 places, 148 transitions, 1318 flow. Second operand 9 states and 240 transitions. [2024-06-14 13:38:51,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 220 transitions, 2049 flow [2024-06-14 13:38:51,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 220 transitions, 1961 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-14 13:38:51,161 INFO L231 Difference]: Finished difference. Result has 117 places, 154 transitions, 1441 flow [2024-06-14 13:38:51,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1230, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1441, PETRI_PLACES=117, PETRI_TRANSITIONS=154} [2024-06-14 13:38:51,161 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 59 predicate places. [2024-06-14 13:38:51,161 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 154 transitions, 1441 flow [2024-06-14 13:38:51,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:51,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:38:51,162 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:38:51,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 13:38:51,162 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:38:51,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:38:51,162 INFO L85 PathProgramCache]: Analyzing trace with hash -806058422, now seen corresponding path program 5 times [2024-06-14 13:38:51,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:38:51,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381662620] [2024-06-14 13:38:51,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:38:51,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:38:51,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:38:54,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:38:54,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:38:54,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381662620] [2024-06-14 13:38:54,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381662620] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:38:54,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:38:54,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:38:54,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401689771] [2024-06-14 13:38:54,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:38:55,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:38:55,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:38:55,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:38:55,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:38:55,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 55 [2024-06-14 13:38:55,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 154 transitions, 1441 flow. Second operand has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:55,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:38:55,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 55 [2024-06-14 13:38:55,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:38:58,187 INFO L124 PetriNetUnfolderBase]: 7263/10309 cut-off events. [2024-06-14 13:38:58,188 INFO L125 PetriNetUnfolderBase]: For 95866/95944 co-relation queries the response was YES. [2024-06-14 13:38:58,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48433 conditions, 10309 events. 7263/10309 cut-off events. For 95866/95944 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 56169 event pairs, 3023 based on Foata normal form. 41/10342 useless extension candidates. Maximal degree in co-relation 48384. Up to 9638 conditions per place. [2024-06-14 13:38:58,244 INFO L140 encePairwiseOnDemand]: 42/55 looper letters, 140 selfloop transitions, 62 changer transitions 0/210 dead transitions. [2024-06-14 13:38:58,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 210 transitions, 2116 flow [2024-06-14 13:38:58,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:38:58,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:38:58,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 196 transitions. [2024-06-14 13:38:58,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.509090909090909 [2024-06-14 13:38:58,247 INFO L175 Difference]: Start difference. First operand has 117 places, 154 transitions, 1441 flow. Second operand 7 states and 196 transitions. [2024-06-14 13:38:58,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 210 transitions, 2116 flow [2024-06-14 13:38:58,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 210 transitions, 1954 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-14 13:38:58,322 INFO L231 Difference]: Finished difference. Result has 118 places, 158 transitions, 1477 flow [2024-06-14 13:38:58,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1291, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1477, PETRI_PLACES=118, PETRI_TRANSITIONS=158} [2024-06-14 13:38:58,323 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 60 predicate places. [2024-06-14 13:38:58,323 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 158 transitions, 1477 flow [2024-06-14 13:38:58,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:58,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:38:58,323 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:38:58,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 13:38:58,324 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:38:58,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:38:58,324 INFO L85 PathProgramCache]: Analyzing trace with hash -271716568, now seen corresponding path program 6 times [2024-06-14 13:38:58,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:38:58,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036385233] [2024-06-14 13:38:58,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:38:58,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:38:58,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:39:01,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:39:01,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:39:01,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036385233] [2024-06-14 13:39:01,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036385233] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:39:01,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:39:01,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:39:01,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554001992] [2024-06-14 13:39:01,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:39:01,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:39:01,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:39:01,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:39:01,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:39:01,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 55 [2024-06-14 13:39:01,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 158 transitions, 1477 flow. Second operand has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:39:01,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:39:01,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 55 [2024-06-14 13:39:01,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:39:05,699 INFO L124 PetriNetUnfolderBase]: 7254/10297 cut-off events. [2024-06-14 13:39:05,699 INFO L125 PetriNetUnfolderBase]: For 105341/105419 co-relation queries the response was YES. [2024-06-14 13:39:05,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48990 conditions, 10297 events. 7254/10297 cut-off events. For 105341/105419 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 56078 event pairs, 3023 based on Foata normal form. 41/10330 useless extension candidates. Maximal degree in co-relation 48940. Up to 9629 conditions per place. [2024-06-14 13:39:05,763 INFO L140 encePairwiseOnDemand]: 42/55 looper letters, 153 selfloop transitions, 64 changer transitions 0/225 dead transitions. [2024-06-14 13:39:05,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 225 transitions, 2078 flow [2024-06-14 13:39:05,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:39:05,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:39:05,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 243 transitions. [2024-06-14 13:39:05,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4909090909090909 [2024-06-14 13:39:05,767 INFO L175 Difference]: Start difference. First operand has 118 places, 158 transitions, 1477 flow. Second operand 9 states and 243 transitions. [2024-06-14 13:39:05,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 225 transitions, 2078 flow [2024-06-14 13:39:05,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 225 transitions, 1946 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-14 13:39:05,889 INFO L231 Difference]: Finished difference. Result has 122 places, 158 transitions, 1489 flow [2024-06-14 13:39:05,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1345, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1489, PETRI_PLACES=122, PETRI_TRANSITIONS=158} [2024-06-14 13:39:05,891 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 64 predicate places. [2024-06-14 13:39:05,891 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 158 transitions, 1489 flow [2024-06-14 13:39:05,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:39:05,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:39:05,892 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:39:05,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 13:39:05,892 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:39:05,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:39:05,892 INFO L85 PathProgramCache]: Analyzing trace with hash 628202255, now seen corresponding path program 1 times [2024-06-14 13:39:05,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:39:05,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303265375] [2024-06-14 13:39:05,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:39:05,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:39:05,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:39:09,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:39:09,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:39:09,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303265375] [2024-06-14 13:39:09,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303265375] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:39:09,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:39:09,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:39:09,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728994502] [2024-06-14 13:39:09,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:39:09,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:39:09,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:39:09,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:39:09,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:39:09,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 55 [2024-06-14 13:39:10,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 158 transitions, 1489 flow. Second operand has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:39:10,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:39:10,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 55 [2024-06-14 13:39:10,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:39:12,941 INFO L124 PetriNetUnfolderBase]: 7091/10133 cut-off events. [2024-06-14 13:39:12,942 INFO L125 PetriNetUnfolderBase]: For 116998/117171 co-relation queries the response was YES. [2024-06-14 13:39:12,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49608 conditions, 10133 events. 7091/10133 cut-off events. For 116998/117171 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 56829 event pairs, 2165 based on Foata normal form. 51/9891 useless extension candidates. Maximal degree in co-relation 49558. Up to 9103 conditions per place. [2024-06-14 13:39:13,017 INFO L140 encePairwiseOnDemand]: 43/55 looper letters, 132 selfloop transitions, 68 changer transitions 0/226 dead transitions. [2024-06-14 13:39:13,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 226 transitions, 2209 flow [2024-06-14 13:39:13,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:39:13,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:39:13,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 226 transitions. [2024-06-14 13:39:13,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5136363636363637 [2024-06-14 13:39:13,020 INFO L175 Difference]: Start difference. First operand has 122 places, 158 transitions, 1489 flow. Second operand 8 states and 226 transitions. [2024-06-14 13:39:13,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 226 transitions, 2209 flow [2024-06-14 13:39:13,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 226 transitions, 2025 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-14 13:39:13,164 INFO L231 Difference]: Finished difference. Result has 120 places, 164 transitions, 1543 flow [2024-06-14 13:39:13,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1311, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1543, PETRI_PLACES=120, PETRI_TRANSITIONS=164} [2024-06-14 13:39:13,165 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 62 predicate places. [2024-06-14 13:39:13,165 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 164 transitions, 1543 flow [2024-06-14 13:39:13,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:39:13,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:39:13,165 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:39:13,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 13:39:13,166 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:39:13,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:39:13,166 INFO L85 PathProgramCache]: Analyzing trace with hash 628262705, now seen corresponding path program 2 times [2024-06-14 13:39:13,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:39:13,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3313801] [2024-06-14 13:39:13,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:39:13,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:39:13,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:39:16,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:39:16,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:39:16,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3313801] [2024-06-14 13:39:16,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3313801] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:39:16,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:39:16,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:39:16,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413954894] [2024-06-14 13:39:16,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:39:16,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:39:16,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:39:16,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:39:16,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:39:17,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 55 [2024-06-14 13:39:17,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 164 transitions, 1543 flow. Second operand has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:39:17,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:39:17,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 55 [2024-06-14 13:39:17,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:39:20,281 INFO L124 PetriNetUnfolderBase]: 7137/10199 cut-off events. [2024-06-14 13:39:20,281 INFO L125 PetriNetUnfolderBase]: For 124647/124846 co-relation queries the response was YES. [2024-06-14 13:39:20,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51228 conditions, 10199 events. 7137/10199 cut-off events. For 124647/124846 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 57221 event pairs, 2606 based on Foata normal form. 45/9937 useless extension candidates. Maximal degree in co-relation 51178. Up to 9324 conditions per place. [2024-06-14 13:39:20,343 INFO L140 encePairwiseOnDemand]: 43/55 looper letters, 135 selfloop transitions, 64 changer transitions 0/225 dead transitions. [2024-06-14 13:39:20,343 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 225 transitions, 2129 flow [2024-06-14 13:39:20,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:39:20,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:39:20,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 222 transitions. [2024-06-14 13:39:20,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5045454545454545 [2024-06-14 13:39:20,345 INFO L175 Difference]: Start difference. First operand has 120 places, 164 transitions, 1543 flow. Second operand 8 states and 222 transitions. [2024-06-14 13:39:20,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 225 transitions, 2129 flow [2024-06-14 13:39:20,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 225 transitions, 2019 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-14 13:39:20,452 INFO L231 Difference]: Finished difference. Result has 124 places, 167 transitions, 1624 flow [2024-06-14 13:39:20,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1439, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1624, PETRI_PLACES=124, PETRI_TRANSITIONS=167} [2024-06-14 13:39:20,452 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 66 predicate places. [2024-06-14 13:39:20,452 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 167 transitions, 1624 flow [2024-06-14 13:39:20,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:39:20,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:39:20,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:39:20,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 13:39:20,453 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:39:20,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:39:20,453 INFO L85 PathProgramCache]: Analyzing trace with hash -743796099, now seen corresponding path program 3 times [2024-06-14 13:39:20,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:39:20,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795454459] [2024-06-14 13:39:20,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:39:20,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:39:20,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:39:24,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:39:24,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:39:24,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795454459] [2024-06-14 13:39:24,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795454459] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:39:24,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:39:24,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:39:24,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519373576] [2024-06-14 13:39:24,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:39:24,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:39:24,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:39:24,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:39:24,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:39:24,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 55 [2024-06-14 13:39:24,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 167 transitions, 1624 flow. Second operand has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:39:24,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:39:24,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 55 [2024-06-14 13:39:24,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:39:27,515 INFO L124 PetriNetUnfolderBase]: 7185/10273 cut-off events. [2024-06-14 13:39:27,516 INFO L125 PetriNetUnfolderBase]: For 137917/138116 co-relation queries the response was YES. [2024-06-14 13:39:27,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52551 conditions, 10273 events. 7185/10273 cut-off events. For 137917/138116 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 57845 event pairs, 2606 based on Foata normal form. 45/10003 useless extension candidates. Maximal degree in co-relation 52499. Up to 9475 conditions per place. [2024-06-14 13:39:27,591 INFO L140 encePairwiseOnDemand]: 43/55 looper letters, 153 selfloop transitions, 45 changer transitions 0/224 dead transitions. [2024-06-14 13:39:27,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 224 transitions, 2198 flow [2024-06-14 13:39:27,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:39:27,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:39:27,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 217 transitions. [2024-06-14 13:39:27,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49318181818181817 [2024-06-14 13:39:27,606 INFO L175 Difference]: Start difference. First operand has 124 places, 167 transitions, 1624 flow. Second operand 8 states and 217 transitions. [2024-06-14 13:39:27,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 224 transitions, 2198 flow [2024-06-14 13:39:27,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 224 transitions, 2053 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-14 13:39:27,764 INFO L231 Difference]: Finished difference. Result has 126 places, 170 transitions, 1632 flow [2024-06-14 13:39:27,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1479, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1632, PETRI_PLACES=126, PETRI_TRANSITIONS=170} [2024-06-14 13:39:27,765 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 68 predicate places. [2024-06-14 13:39:27,765 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 170 transitions, 1632 flow [2024-06-14 13:39:27,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:39:27,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:39:27,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:39:27,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 13:39:27,766 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:39:27,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:39:27,766 INFO L85 PathProgramCache]: Analyzing trace with hash -743611401, now seen corresponding path program 1 times [2024-06-14 13:39:27,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:39:27,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868774706] [2024-06-14 13:39:27,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:39:27,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:39:27,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:39:31,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:39:31,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:39:31,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868774706] [2024-06-14 13:39:31,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868774706] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:39:31,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:39:31,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:39:31,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79888873] [2024-06-14 13:39:31,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:39:31,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:39:31,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:39:31,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:39:31,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:39:31,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 55 [2024-06-14 13:39:31,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 170 transitions, 1632 flow. Second operand has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:39:31,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:39:31,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 55 [2024-06-14 13:39:31,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:39:34,829 INFO L124 PetriNetUnfolderBase]: 7526/10691 cut-off events. [2024-06-14 13:39:34,829 INFO L125 PetriNetUnfolderBase]: For 137281/137361 co-relation queries the response was YES. [2024-06-14 13:39:34,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53455 conditions, 10691 events. 7526/10691 cut-off events. For 137281/137361 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 58428 event pairs, 2799 based on Foata normal form. 44/10727 useless extension candidates. Maximal degree in co-relation 53402. Up to 10139 conditions per place. [2024-06-14 13:39:34,894 INFO L140 encePairwiseOnDemand]: 43/55 looper letters, 184 selfloop transitions, 36 changer transitions 0/228 dead transitions. [2024-06-14 13:39:34,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 228 transitions, 2245 flow [2024-06-14 13:39:34,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:39:34,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:39:34,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 212 transitions. [2024-06-14 13:39:34,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4818181818181818 [2024-06-14 13:39:34,896 INFO L175 Difference]: Start difference. First operand has 126 places, 170 transitions, 1632 flow. Second operand 8 states and 212 transitions. [2024-06-14 13:39:34,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 228 transitions, 2245 flow [2024-06-14 13:39:35,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 228 transitions, 2132 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-14 13:39:35,035 INFO L231 Difference]: Finished difference. Result has 128 places, 173 transitions, 1643 flow [2024-06-14 13:39:35,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1519, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1643, PETRI_PLACES=128, PETRI_TRANSITIONS=173} [2024-06-14 13:39:35,036 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 70 predicate places. [2024-06-14 13:39:35,036 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 173 transitions, 1643 flow [2024-06-14 13:39:35,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:39:35,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:39:35,037 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:39:35,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 13:39:35,037 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:39:35,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:39:35,037 INFO L85 PathProgramCache]: Analyzing trace with hash 781990223, now seen corresponding path program 4 times [2024-06-14 13:39:35,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:39:35,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581916164] [2024-06-14 13:39:35,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:39:35,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:39:35,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:39:38,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:39:38,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:39:38,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581916164] [2024-06-14 13:39:38,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581916164] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:39:38,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:39:38,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:39:38,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995734084] [2024-06-14 13:39:38,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:39:38,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:39:38,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:39:38,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:39:38,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:39:38,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 55 [2024-06-14 13:39:38,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 173 transitions, 1643 flow. Second operand has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:39:38,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:39:38,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 55 [2024-06-14 13:39:38,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:39:42,194 INFO L124 PetriNetUnfolderBase]: 7211/10316 cut-off events. [2024-06-14 13:39:42,195 INFO L125 PetriNetUnfolderBase]: For 164895/165206 co-relation queries the response was YES. [2024-06-14 13:39:42,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54780 conditions, 10316 events. 7211/10316 cut-off events. For 164895/165206 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 58035 event pairs, 2120 based on Foata normal form. 69/10067 useless extension candidates. Maximal degree in co-relation 54726. Up to 9347 conditions per place. [2024-06-14 13:39:42,272 INFO L140 encePairwiseOnDemand]: 43/55 looper letters, 132 selfloop transitions, 63 changer transitions 0/222 dead transitions. [2024-06-14 13:39:42,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 222 transitions, 2153 flow [2024-06-14 13:39:42,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:39:42,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:39:42,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 197 transitions. [2024-06-14 13:39:42,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5116883116883116 [2024-06-14 13:39:42,275 INFO L175 Difference]: Start difference. First operand has 128 places, 173 transitions, 1643 flow. Second operand 7 states and 197 transitions. [2024-06-14 13:39:42,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 222 transitions, 2153 flow [2024-06-14 13:39:42,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 222 transitions, 2037 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-14 13:39:42,419 INFO L231 Difference]: Finished difference. Result has 129 places, 173 transitions, 1674 flow [2024-06-14 13:39:42,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1527, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1674, PETRI_PLACES=129, PETRI_TRANSITIONS=173} [2024-06-14 13:39:42,420 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 71 predicate places. [2024-06-14 13:39:42,420 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 173 transitions, 1674 flow [2024-06-14 13:39:42,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:39:42,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:39:42,420 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:39:42,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 13:39:42,421 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:39:42,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:39:42,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1010076071, now seen corresponding path program 2 times [2024-06-14 13:39:42,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:39:42,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283683399] [2024-06-14 13:39:42,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:39:42,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:39:42,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:39:45,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:39:45,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:39:45,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283683399] [2024-06-14 13:39:45,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283683399] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:39:45,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:39:45,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:39:45,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490509895] [2024-06-14 13:39:45,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:39:45,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:39:45,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:39:45,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:39:45,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:39:45,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 55 [2024-06-14 13:39:45,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 173 transitions, 1674 flow. Second operand has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:39:45,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:39:45,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 55 [2024-06-14 13:39:45,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:39:48,721 INFO L124 PetriNetUnfolderBase]: 7543/10731 cut-off events. [2024-06-14 13:39:48,721 INFO L125 PetriNetUnfolderBase]: For 165028/165514 co-relation queries the response was YES. [2024-06-14 13:39:48,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55952 conditions, 10731 events. 7543/10731 cut-off events. For 165028/165514 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 58724 event pairs, 2840 based on Foata normal form. 100/10814 useless extension candidates. Maximal degree in co-relation 55897. Up to 10166 conditions per place. [2024-06-14 13:39:48,809 INFO L140 encePairwiseOnDemand]: 44/55 looper letters, 175 selfloop transitions, 35 changer transitions 0/218 dead transitions. [2024-06-14 13:39:48,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 218 transitions, 2241 flow [2024-06-14 13:39:48,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:39:48,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:39:48,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-14 13:39:48,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4727272727272727 [2024-06-14 13:39:48,811 INFO L175 Difference]: Start difference. First operand has 129 places, 173 transitions, 1674 flow. Second operand 7 states and 182 transitions. [2024-06-14 13:39:48,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 218 transitions, 2241 flow [2024-06-14 13:39:48,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 218 transitions, 2098 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-14 13:39:48,961 INFO L231 Difference]: Finished difference. Result has 130 places, 176 transitions, 1659 flow [2024-06-14 13:39:48,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1531, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1659, PETRI_PLACES=130, PETRI_TRANSITIONS=176} [2024-06-14 13:39:48,962 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 72 predicate places. [2024-06-14 13:39:48,962 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 176 transitions, 1659 flow [2024-06-14 13:39:48,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:39:48,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:39:48,962 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:39:48,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 13:39:48,962 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:39:48,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:39:48,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1018646951, now seen corresponding path program 3 times [2024-06-14 13:39:48,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:39:48,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387889956] [2024-06-14 13:39:48,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:39:48,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:39:48,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:39:52,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:39:52,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:39:52,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387889956] [2024-06-14 13:39:52,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387889956] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:39:52,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:39:52,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:39:52,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823331386] [2024-06-14 13:39:52,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:39:52,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:39:52,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:39:52,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:39:52,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:39:52,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 55 [2024-06-14 13:39:52,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 176 transitions, 1659 flow. Second operand has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:39:52,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:39:52,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 55 [2024-06-14 13:39:52,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:39:55,228 INFO L124 PetriNetUnfolderBase]: 7587/10795 cut-off events. [2024-06-14 13:39:55,229 INFO L125 PetriNetUnfolderBase]: For 168304/168812 co-relation queries the response was YES. [2024-06-14 13:39:55,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57235 conditions, 10795 events. 7587/10795 cut-off events. For 168304/168812 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 59187 event pairs, 2646 based on Foata normal form. 100/10878 useless extension candidates. Maximal degree in co-relation 57179. Up to 10059 conditions per place. [2024-06-14 13:39:55,301 INFO L140 encePairwiseOnDemand]: 44/55 looper letters, 174 selfloop transitions, 46 changer transitions 0/228 dead transitions. [2024-06-14 13:39:55,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 228 transitions, 2422 flow [2024-06-14 13:39:55,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:39:55,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:39:55,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-06-14 13:39:55,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4831168831168831 [2024-06-14 13:39:55,304 INFO L175 Difference]: Start difference. First operand has 130 places, 176 transitions, 1659 flow. Second operand 7 states and 186 transitions. [2024-06-14 13:39:55,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 228 transitions, 2422 flow [2024-06-14 13:39:55,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 228 transitions, 2320 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-14 13:39:55,435 INFO L231 Difference]: Finished difference. Result has 132 places, 182 transitions, 1761 flow [2024-06-14 13:39:55,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1557, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1761, PETRI_PLACES=132, PETRI_TRANSITIONS=182} [2024-06-14 13:39:55,436 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 74 predicate places. [2024-06-14 13:39:55,436 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 182 transitions, 1761 flow [2024-06-14 13:39:55,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:39:55,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:39:55,437 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:39:55,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 13:39:55,437 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:39:55,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:39:55,437 INFO L85 PathProgramCache]: Analyzing trace with hash 166730231, now seen corresponding path program 4 times [2024-06-14 13:39:55,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:39:55,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056604803] [2024-06-14 13:39:55,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:39:55,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:39:55,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:39:59,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:39:59,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:39:59,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056604803] [2024-06-14 13:39:59,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056604803] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:39:59,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:39:59,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:39:59,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041066503] [2024-06-14 13:39:59,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:39:59,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:39:59,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:39:59,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:39:59,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:39:59,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 55 [2024-06-14 13:39:59,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 182 transitions, 1761 flow. Second operand has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:39:59,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:39:59,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 55 [2024-06-14 13:39:59,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:40:02,126 INFO L124 PetriNetUnfolderBase]: 7572/10761 cut-off events. [2024-06-14 13:40:02,126 INFO L125 PetriNetUnfolderBase]: For 185884/185979 co-relation queries the response was YES. [2024-06-14 13:40:02,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58893 conditions, 10761 events. 7572/10761 cut-off events. For 185884/185979 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 58840 event pairs, 2797 based on Foata normal form. 47/10800 useless extension candidates. Maximal degree in co-relation 58836. Up to 10171 conditions per place. [2024-06-14 13:40:02,211 INFO L140 encePairwiseOnDemand]: 44/55 looper letters, 181 selfloop transitions, 39 changer transitions 0/228 dead transitions. [2024-06-14 13:40:02,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 228 transitions, 2316 flow [2024-06-14 13:40:02,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:40:02,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:40:02,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 187 transitions. [2024-06-14 13:40:02,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4857142857142857 [2024-06-14 13:40:02,219 INFO L175 Difference]: Start difference. First operand has 132 places, 182 transitions, 1761 flow. Second operand 7 states and 187 transitions. [2024-06-14 13:40:02,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 228 transitions, 2316 flow [2024-06-14 13:40:02,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 228 transitions, 2213 flow, removed 34 selfloop flow, removed 3 redundant places. [2024-06-14 13:40:02,391 INFO L231 Difference]: Finished difference. Result has 136 places, 182 transitions, 1750 flow [2024-06-14 13:40:02,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1658, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1750, PETRI_PLACES=136, PETRI_TRANSITIONS=182} [2024-06-14 13:40:02,392 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 78 predicate places. [2024-06-14 13:40:02,393 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 182 transitions, 1750 flow [2024-06-14 13:40:02,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:40:02,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:40:02,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:40:02,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 13:40:02,393 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:40:02,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:40:02,408 INFO L85 PathProgramCache]: Analyzing trace with hash -631878169, now seen corresponding path program 1 times [2024-06-14 13:40:02,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:40:02,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889252264] [2024-06-14 13:40:02,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:40:02,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:40:02,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:40:04,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:40:04,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:40:04,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889252264] [2024-06-14 13:40:04,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889252264] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:40:04,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:40:04,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:40:04,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252542562] [2024-06-14 13:40:04,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:40:04,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:40:04,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:40:04,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:40:04,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:40:04,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 55 [2024-06-14 13:40:04,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 182 transitions, 1750 flow. Second operand has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:40:04,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:40:04,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 55 [2024-06-14 13:40:04,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:40:07,391 INFO L124 PetriNetUnfolderBase]: 8370/11901 cut-off events. [2024-06-14 13:40:07,391 INFO L125 PetriNetUnfolderBase]: For 225786/225881 co-relation queries the response was YES. [2024-06-14 13:40:07,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65533 conditions, 11901 events. 8370/11901 cut-off events. For 225786/225881 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 65791 event pairs, 3347 based on Foata normal form. 99/11976 useless extension candidates. Maximal degree in co-relation 65474. Up to 11322 conditions per place. [2024-06-14 13:40:07,478 INFO L140 encePairwiseOnDemand]: 46/55 looper letters, 185 selfloop transitions, 15 changer transitions 0/214 dead transitions. [2024-06-14 13:40:07,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 214 transitions, 2321 flow [2024-06-14 13:40:07,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:40:07,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:40:07,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 125 transitions. [2024-06-14 13:40:07,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-14 13:40:07,479 INFO L175 Difference]: Start difference. First operand has 136 places, 182 transitions, 1750 flow. Second operand 5 states and 125 transitions. [2024-06-14 13:40:07,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 214 transitions, 2321 flow [2024-06-14 13:40:07,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 214 transitions, 2219 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-14 13:40:07,686 INFO L231 Difference]: Finished difference. Result has 136 places, 195 transitions, 1840 flow [2024-06-14 13:40:07,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1654, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1840, PETRI_PLACES=136, PETRI_TRANSITIONS=195} [2024-06-14 13:40:07,687 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 78 predicate places. [2024-06-14 13:40:07,687 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 195 transitions, 1840 flow [2024-06-14 13:40:07,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:40:07,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:40:07,687 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:40:07,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 13:40:07,687 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:40:07,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:40:07,688 INFO L85 PathProgramCache]: Analyzing trace with hash -2000564117, now seen corresponding path program 1 times [2024-06-14 13:40:07,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:40:07,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815227215] [2024-06-14 13:40:07,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:40:07,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:40:07,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:40:12,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:40:12,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:40:12,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815227215] [2024-06-14 13:40:12,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815227215] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:40:12,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:40:12,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:40:12,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726109659] [2024-06-14 13:40:12,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:40:12,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:40:12,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:40:12,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:40:12,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:40:12,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 55 [2024-06-14 13:40:12,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 195 transitions, 1840 flow. Second operand has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:40:12,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:40:12,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 55 [2024-06-14 13:40:12,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:40:15,701 INFO L124 PetriNetUnfolderBase]: 8815/12551 cut-off events. [2024-06-14 13:40:15,702 INFO L125 PetriNetUnfolderBase]: For 265873/266238 co-relation queries the response was YES. [2024-06-14 13:40:15,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74553 conditions, 12551 events. 8815/12551 cut-off events. For 265873/266238 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 70312 event pairs, 2199 based on Foata normal form. 126/12660 useless extension candidates. Maximal degree in co-relation 74492. Up to 10951 conditions per place. [2024-06-14 13:40:15,794 INFO L140 encePairwiseOnDemand]: 42/55 looper letters, 198 selfloop transitions, 80 changer transitions 0/288 dead transitions. [2024-06-14 13:40:15,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 288 transitions, 2920 flow [2024-06-14 13:40:15,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:40:15,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:40:15,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 251 transitions. [2024-06-14 13:40:15,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5070707070707071 [2024-06-14 13:40:15,796 INFO L175 Difference]: Start difference. First operand has 136 places, 195 transitions, 1840 flow. Second operand 9 states and 251 transitions. [2024-06-14 13:40:15,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 288 transitions, 2920 flow [2024-06-14 13:40:16,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 288 transitions, 2904 flow, removed 7 selfloop flow, removed 1 redundant places. [2024-06-14 13:40:16,021 INFO L231 Difference]: Finished difference. Result has 146 places, 207 transitions, 2206 flow [2024-06-14 13:40:16,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1824, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2206, PETRI_PLACES=146, PETRI_TRANSITIONS=207} [2024-06-14 13:40:16,021 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 88 predicate places. [2024-06-14 13:40:16,021 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 207 transitions, 2206 flow [2024-06-14 13:40:16,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:40:16,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:40:16,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:40:16,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 13:40:16,022 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:40:16,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:40:16,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1911998357, now seen corresponding path program 2 times [2024-06-14 13:40:16,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:40:16,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965154133] [2024-06-14 13:40:16,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:40:16,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:40:16,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:40:20,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:40:20,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:40:20,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965154133] [2024-06-14 13:40:20,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965154133] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:40:20,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:40:20,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:40:20,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121689709] [2024-06-14 13:40:20,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:40:20,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:40:20,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:40:20,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:40:20,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:40:20,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 55 [2024-06-14 13:40:20,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 207 transitions, 2206 flow. Second operand has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:40:20,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:40:20,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 55 [2024-06-14 13:40:20,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:40:24,116 INFO L124 PetriNetUnfolderBase]: 9137/13039 cut-off events. [2024-06-14 13:40:24,117 INFO L125 PetriNetUnfolderBase]: For 304542/304921 co-relation queries the response was YES. [2024-06-14 13:40:24,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80480 conditions, 13039 events. 9137/13039 cut-off events. For 304542/304921 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 73609 event pairs, 2960 based on Foata normal form. 126/13148 useless extension candidates. Maximal degree in co-relation 80414. Up to 11805 conditions per place. [2024-06-14 13:40:24,227 INFO L140 encePairwiseOnDemand]: 42/55 looper letters, 204 selfloop transitions, 75 changer transitions 0/289 dead transitions. [2024-06-14 13:40:24,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 289 transitions, 3206 flow [2024-06-14 13:40:24,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:40:24,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:40:24,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 251 transitions. [2024-06-14 13:40:24,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5070707070707071 [2024-06-14 13:40:24,230 INFO L175 Difference]: Start difference. First operand has 146 places, 207 transitions, 2206 flow. Second operand 9 states and 251 transitions. [2024-06-14 13:40:24,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 289 transitions, 3206 flow [2024-06-14 13:40:24,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 289 transitions, 3068 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-14 13:40:24,599 INFO L231 Difference]: Finished difference. Result has 152 places, 212 transitions, 2341 flow [2024-06-14 13:40:24,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=2076, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2341, PETRI_PLACES=152, PETRI_TRANSITIONS=212} [2024-06-14 13:40:24,600 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 94 predicate places. [2024-06-14 13:40:24,600 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 212 transitions, 2341 flow [2024-06-14 13:40:24,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:40:24,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:40:24,601 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:40:24,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 13:40:24,601 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:40:24,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:40:24,601 INFO L85 PathProgramCache]: Analyzing trace with hash -861895385, now seen corresponding path program 3 times [2024-06-14 13:40:24,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:40:24,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722950578] [2024-06-14 13:40:24,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:40:24,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:40:24,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:40:29,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:40:29,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:40:29,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722950578] [2024-06-14 13:40:29,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722950578] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:40:29,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:40:29,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:40:29,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610711205] [2024-06-14 13:40:29,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:40:29,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:40:29,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:40:29,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:40:29,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:40:29,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 55 [2024-06-14 13:40:29,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 212 transitions, 2341 flow. Second operand has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:40:29,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:40:29,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 55 [2024-06-14 13:40:29,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:40:33,158 INFO L124 PetriNetUnfolderBase]: 9083/12965 cut-off events. [2024-06-14 13:40:33,158 INFO L125 PetriNetUnfolderBase]: For 320167/320546 co-relation queries the response was YES. [2024-06-14 13:40:33,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80537 conditions, 12965 events. 9083/12965 cut-off events. For 320167/320546 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 73245 event pairs, 2972 based on Foata normal form. 132/13080 useless extension candidates. Maximal degree in co-relation 80468. Up to 11963 conditions per place. [2024-06-14 13:40:33,268 INFO L140 encePairwiseOnDemand]: 42/55 looper letters, 202 selfloop transitions, 72 changer transitions 0/284 dead transitions. [2024-06-14 13:40:33,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 284 transitions, 3094 flow [2024-06-14 13:40:33,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:40:33,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:40:33,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 245 transitions. [2024-06-14 13:40:33,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.494949494949495 [2024-06-14 13:40:33,270 INFO L175 Difference]: Start difference. First operand has 152 places, 212 transitions, 2341 flow. Second operand 9 states and 245 transitions. [2024-06-14 13:40:33,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 284 transitions, 3094 flow [2024-06-14 13:40:33,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 284 transitions, 2956 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-14 13:40:33,594 INFO L231 Difference]: Finished difference. Result has 156 places, 213 transitions, 2377 flow [2024-06-14 13:40:33,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=2209, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2377, PETRI_PLACES=156, PETRI_TRANSITIONS=213} [2024-06-14 13:40:33,595 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 98 predicate places. [2024-06-14 13:40:33,595 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 213 transitions, 2377 flow [2024-06-14 13:40:33,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:40:33,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:40:33,596 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:40:33,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 13:40:33,596 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:40:33,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:40:33,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1662031633, now seen corresponding path program 4 times [2024-06-14 13:40:33,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:40:33,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253012531] [2024-06-14 13:40:33,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:40:33,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:40:33,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:40:38,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:40:38,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:40:38,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253012531] [2024-06-14 13:40:38,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253012531] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:40:38,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:40:38,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:40:38,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997503123] [2024-06-14 13:40:38,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:40:38,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:40:38,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:40:38,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:40:38,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:40:38,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 55 [2024-06-14 13:40:38,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 213 transitions, 2377 flow. Second operand has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:40:38,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:40:38,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 55 [2024-06-14 13:40:38,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:40:41,920 INFO L124 PetriNetUnfolderBase]: 9239/13221 cut-off events. [2024-06-14 13:40:41,921 INFO L125 PetriNetUnfolderBase]: For 339974/340353 co-relation queries the response was YES. [2024-06-14 13:40:41,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82621 conditions, 13221 events. 9239/13221 cut-off events. For 339974/340353 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 75231 event pairs, 3010 based on Foata normal form. 116/13320 useless extension candidates. Maximal degree in co-relation 82550. Up to 12341 conditions per place. [2024-06-14 13:40:42,028 INFO L140 encePairwiseOnDemand]: 42/55 looper letters, 224 selfloop transitions, 48 changer transitions 0/282 dead transitions. [2024-06-14 13:40:42,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 282 transitions, 3146 flow [2024-06-14 13:40:42,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:40:42,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:40:42,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 241 transitions. [2024-06-14 13:40:42,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4868686868686869 [2024-06-14 13:40:42,030 INFO L175 Difference]: Start difference. First operand has 156 places, 213 transitions, 2377 flow. Second operand 9 states and 241 transitions. [2024-06-14 13:40:42,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 282 transitions, 3146 flow [2024-06-14 13:40:42,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 282 transitions, 3002 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-14 13:40:42,337 INFO L231 Difference]: Finished difference. Result has 158 places, 215 transitions, 2391 flow [2024-06-14 13:40:42,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=2233, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2391, PETRI_PLACES=158, PETRI_TRANSITIONS=215} [2024-06-14 13:40:42,337 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 100 predicate places. [2024-06-14 13:40:42,337 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 215 transitions, 2391 flow [2024-06-14 13:40:42,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:40:42,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:40:42,338 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:40:42,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 13:40:42,338 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:40:42,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:40:42,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1662027913, now seen corresponding path program 5 times [2024-06-14 13:40:42,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:40:42,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268056794] [2024-06-14 13:40:42,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:40:42,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:40:42,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:40:46,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:40:46,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:40:46,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268056794] [2024-06-14 13:40:46,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268056794] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:40:46,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:40:46,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:40:46,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198983526] [2024-06-14 13:40:46,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:40:46,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:40:46,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:40:46,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:40:46,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:40:46,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 55 [2024-06-14 13:40:46,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 215 transitions, 2391 flow. Second operand has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:40:46,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:40:46,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 55 [2024-06-14 13:40:46,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:40:50,335 INFO L124 PetriNetUnfolderBase]: 9561/13707 cut-off events. [2024-06-14 13:40:50,335 INFO L125 PetriNetUnfolderBase]: For 373450/373817 co-relation queries the response was YES. [2024-06-14 13:40:50,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86818 conditions, 13707 events. 9561/13707 cut-off events. For 373450/373817 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 78622 event pairs, 3038 based on Foata normal form. 110/13800 useless extension candidates. Maximal degree in co-relation 86746. Up to 12399 conditions per place. [2024-06-14 13:40:50,454 INFO L140 encePairwiseOnDemand]: 42/55 looper letters, 230 selfloop transitions, 53 changer transitions 0/293 dead transitions. [2024-06-14 13:40:50,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 293 transitions, 3417 flow [2024-06-14 13:40:50,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:40:50,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:40:50,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 246 transitions. [2024-06-14 13:40:50,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49696969696969695 [2024-06-14 13:40:50,456 INFO L175 Difference]: Start difference. First operand has 158 places, 215 transitions, 2391 flow. Second operand 9 states and 246 transitions. [2024-06-14 13:40:50,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 293 transitions, 3417 flow [2024-06-14 13:40:50,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 293 transitions, 3301 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-14 13:40:50,862 INFO L231 Difference]: Finished difference. Result has 161 places, 220 transitions, 2518 flow [2024-06-14 13:40:50,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=2275, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2518, PETRI_PLACES=161, PETRI_TRANSITIONS=220} [2024-06-14 13:40:50,863 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 103 predicate places. [2024-06-14 13:40:50,863 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 220 transitions, 2518 flow [2024-06-14 13:40:50,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:40:50,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:40:50,863 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:40:50,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 13:40:50,863 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:40:50,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:40:50,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1667538163, now seen corresponding path program 6 times [2024-06-14 13:40:50,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:40:50,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473776213] [2024-06-14 13:40:50,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:40:50,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:40:50,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:40:55,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:40:55,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:40:55,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473776213] [2024-06-14 13:40:55,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473776213] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:40:55,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:40:55,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:40:55,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886125906] [2024-06-14 13:40:55,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:40:55,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:40:55,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:40:55,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:40:55,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:40:55,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 55 [2024-06-14 13:40:55,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 220 transitions, 2518 flow. Second operand has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:40:55,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:40:55,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 55 [2024-06-14 13:40:55,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:40:59,588 INFO L124 PetriNetUnfolderBase]: 9507/13629 cut-off events. [2024-06-14 13:40:59,589 INFO L125 PetriNetUnfolderBase]: For 389675/390042 co-relation queries the response was YES. [2024-06-14 13:40:59,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86768 conditions, 13629 events. 9507/13629 cut-off events. For 389675/390042 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 78142 event pairs, 3050 based on Foata normal form. 116/13728 useless extension candidates. Maximal degree in co-relation 86694. Up to 12749 conditions per place. [2024-06-14 13:40:59,695 INFO L140 encePairwiseOnDemand]: 42/55 looper letters, 247 selfloop transitions, 49 changer transitions 0/306 dead transitions. [2024-06-14 13:40:59,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 306 transitions, 3353 flow [2024-06-14 13:40:59,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:40:59,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:40:59,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 289 transitions. [2024-06-14 13:40:59,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47768595041322315 [2024-06-14 13:40:59,698 INFO L175 Difference]: Start difference. First operand has 161 places, 220 transitions, 2518 flow. Second operand 11 states and 289 transitions. [2024-06-14 13:40:59,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 306 transitions, 3353 flow [2024-06-14 13:41:00,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 306 transitions, 3235 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-14 13:41:00,171 INFO L231 Difference]: Finished difference. Result has 167 places, 221 transitions, 2532 flow [2024-06-14 13:41:00,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=2408, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2532, PETRI_PLACES=167, PETRI_TRANSITIONS=221} [2024-06-14 13:41:00,172 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 109 predicate places. [2024-06-14 13:41:00,172 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 221 transitions, 2532 flow [2024-06-14 13:41:00,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:41:00,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:41:00,172 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:41:00,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 13:41:00,172 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:41:00,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:41:00,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1667753365, now seen corresponding path program 1 times [2024-06-14 13:41:00,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:41:00,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86020204] [2024-06-14 13:41:00,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:41:00,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:41:00,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:41:04,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:41:04,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:41:04,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86020204] [2024-06-14 13:41:04,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86020204] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:41:04,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:41:04,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:41:04,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226674873] [2024-06-14 13:41:04,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:41:04,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:41:04,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:41:04,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:41:04,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:41:04,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 55 [2024-06-14 13:41:04,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 221 transitions, 2532 flow. Second operand has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:41:04,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:41:04,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 55 [2024-06-14 13:41:04,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:41:08,597 INFO L124 PetriNetUnfolderBase]: 9619/13821 cut-off events. [2024-06-14 13:41:08,598 INFO L125 PetriNetUnfolderBase]: For 407502/407869 co-relation queries the response was YES. [2024-06-14 13:41:08,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88185 conditions, 13821 events. 9619/13821 cut-off events. For 407502/407869 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 79572 event pairs, 3042 based on Foata normal form. 110/13914 useless extension candidates. Maximal degree in co-relation 88109. Up to 12547 conditions per place. [2024-06-14 13:41:08,720 INFO L140 encePairwiseOnDemand]: 42/55 looper letters, 245 selfloop transitions, 56 changer transitions 0/311 dead transitions. [2024-06-14 13:41:08,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 311 transitions, 3413 flow [2024-06-14 13:41:08,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:41:08,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:41:08,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 291 transitions. [2024-06-14 13:41:08,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4809917355371901 [2024-06-14 13:41:08,723 INFO L175 Difference]: Start difference. First operand has 167 places, 221 transitions, 2532 flow. Second operand 11 states and 291 transitions. [2024-06-14 13:41:08,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 311 transitions, 3413 flow [2024-06-14 13:41:09,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 311 transitions, 3311 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-14 13:41:09,153 INFO L231 Difference]: Finished difference. Result has 169 places, 223 transitions, 2601 flow [2024-06-14 13:41:09,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=2430, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2601, PETRI_PLACES=169, PETRI_TRANSITIONS=223} [2024-06-14 13:41:09,153 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 111 predicate places. [2024-06-14 13:41:09,154 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 223 transitions, 2601 flow [2024-06-14 13:41:09,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:41:09,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:41:09,154 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:41:09,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-14 13:41:09,154 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:41:09,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:41:09,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1247374199, now seen corresponding path program 7 times [2024-06-14 13:41:09,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:41:09,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517278030] [2024-06-14 13:41:09,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:41:09,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:41:09,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:41:13,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:41:13,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:41:13,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517278030] [2024-06-14 13:41:13,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517278030] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:41:13,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:41:13,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:41:13,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293515784] [2024-06-14 13:41:13,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:41:13,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:41:13,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:41:13,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:41:13,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:41:13,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 55 [2024-06-14 13:41:13,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 223 transitions, 2601 flow. Second operand has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:41:13,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:41:13,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 55 [2024-06-14 13:41:13,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:41:17,728 INFO L124 PetriNetUnfolderBase]: 9934/14325 cut-off events. [2024-06-14 13:41:17,728 INFO L125 PetriNetUnfolderBase]: For 446728/447327 co-relation queries the response was YES. [2024-06-14 13:41:17,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93340 conditions, 14325 events. 9934/14325 cut-off events. For 446728/447327 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 83675 event pairs, 3120 based on Foata normal form. 183/14483 useless extension candidates. Maximal degree in co-relation 93263. Up to 13271 conditions per place. [2024-06-14 13:41:17,841 INFO L140 encePairwiseOnDemand]: 42/55 looper letters, 225 selfloop transitions, 66 changer transitions 0/301 dead transitions. [2024-06-14 13:41:17,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 301 transitions, 3438 flow [2024-06-14 13:41:17,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:41:17,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:41:17,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 264 transitions. [2024-06-14 13:41:17,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48 [2024-06-14 13:41:17,844 INFO L175 Difference]: Start difference. First operand has 169 places, 223 transitions, 2601 flow. Second operand 10 states and 264 transitions. [2024-06-14 13:41:17,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 301 transitions, 3438 flow [2024-06-14 13:41:18,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 301 transitions, 3295 flow, removed 17 selfloop flow, removed 9 redundant places. [2024-06-14 13:41:18,209 INFO L231 Difference]: Finished difference. Result has 170 places, 225 transitions, 2660 flow [2024-06-14 13:41:18,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=2458, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2660, PETRI_PLACES=170, PETRI_TRANSITIONS=225} [2024-06-14 13:41:18,210 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 112 predicate places. [2024-06-14 13:41:18,210 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 225 transitions, 2660 flow [2024-06-14 13:41:18,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:41:18,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:41:18,210 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:41:18,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-14 13:41:18,211 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:41:18,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:41:18,211 INFO L85 PathProgramCache]: Analyzing trace with hash -1528100685, now seen corresponding path program 8 times [2024-06-14 13:41:18,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:41:18,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514814208] [2024-06-14 13:41:18,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:41:18,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:41:18,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:41:22,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:41:22,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:41:22,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514814208] [2024-06-14 13:41:22,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514814208] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:41:22,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:41:22,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:41:22,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769279189] [2024-06-14 13:41:22,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:41:22,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:41:22,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:41:22,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:41:22,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:41:22,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 55 [2024-06-14 13:41:22,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 225 transitions, 2660 flow. Second operand has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:41:22,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:41:22,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 55 [2024-06-14 13:41:22,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:41:26,353 INFO L124 PetriNetUnfolderBase]: 9905/14295 cut-off events. [2024-06-14 13:41:26,353 INFO L125 PetriNetUnfolderBase]: For 465517/465900 co-relation queries the response was YES. [2024-06-14 13:41:26,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93047 conditions, 14295 events. 9905/14295 cut-off events. For 465517/465900 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 83639 event pairs, 3114 based on Foata normal form. 148/14426 useless extension candidates. Maximal degree in co-relation 92969. Up to 13063 conditions per place. [2024-06-14 13:41:26,495 INFO L140 encePairwiseOnDemand]: 42/55 looper letters, 211 selfloop transitions, 68 changer transitions 0/289 dead transitions. [2024-06-14 13:41:26,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 289 transitions, 3443 flow [2024-06-14 13:41:26,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:41:26,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:41:26,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 220 transitions. [2024-06-14 13:41:26,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-14 13:41:26,497 INFO L175 Difference]: Start difference. First operand has 170 places, 225 transitions, 2660 flow. Second operand 8 states and 220 transitions. [2024-06-14 13:41:26,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 289 transitions, 3443 flow [2024-06-14 13:41:27,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 289 transitions, 3283 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-14 13:41:27,025 INFO L231 Difference]: Finished difference. Result has 170 places, 227 transitions, 2714 flow [2024-06-14 13:41:27,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=2500, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2714, PETRI_PLACES=170, PETRI_TRANSITIONS=227} [2024-06-14 13:41:27,025 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 112 predicate places. [2024-06-14 13:41:27,025 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 227 transitions, 2714 flow [2024-06-14 13:41:27,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:41:27,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:41:27,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:41:27,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-14 13:41:27,026 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:41:27,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:41:27,026 INFO L85 PathProgramCache]: Analyzing trace with hash 867946685, now seen corresponding path program 9 times [2024-06-14 13:41:27,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:41:27,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406088905] [2024-06-14 13:41:27,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:41:27,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:41:27,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:41:31,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:41:31,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:41:31,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406088905] [2024-06-14 13:41:31,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406088905] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:41:31,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:41:31,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:41:31,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589753072] [2024-06-14 13:41:31,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:41:31,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:41:31,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:41:31,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:41:31,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:41:31,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 55 [2024-06-14 13:41:31,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 227 transitions, 2714 flow. Second operand has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:41:31,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:41:31,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 55 [2024-06-14 13:41:31,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:41:35,764 INFO L124 PetriNetUnfolderBase]: 10017/14465 cut-off events. [2024-06-14 13:41:35,764 INFO L125 PetriNetUnfolderBase]: For 490090/490473 co-relation queries the response was YES. [2024-06-14 13:41:35,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94674 conditions, 14465 events. 10017/14465 cut-off events. For 490090/490473 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 84659 event pairs, 2548 based on Foata normal form. 126/14574 useless extension candidates. Maximal degree in co-relation 94595. Up to 12175 conditions per place. [2024-06-14 13:41:35,880 INFO L140 encePairwiseOnDemand]: 42/55 looper letters, 205 selfloop transitions, 83 changer transitions 0/298 dead transitions. [2024-06-14 13:41:35,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 298 transitions, 3728 flow [2024-06-14 13:41:35,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:41:35,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:41:35,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 226 transitions. [2024-06-14 13:41:35,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5136363636363637 [2024-06-14 13:41:35,882 INFO L175 Difference]: Start difference. First operand has 170 places, 227 transitions, 2714 flow. Second operand 8 states and 226 transitions. [2024-06-14 13:41:35,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 298 transitions, 3728 flow [2024-06-14 13:41:36,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 298 transitions, 3572 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-14 13:41:36,372 INFO L231 Difference]: Finished difference. Result has 173 places, 230 transitions, 2839 flow [2024-06-14 13:41:36,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=2558, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2839, PETRI_PLACES=173, PETRI_TRANSITIONS=230} [2024-06-14 13:41:36,373 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 115 predicate places. [2024-06-14 13:41:36,373 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 230 transitions, 2839 flow [2024-06-14 13:41:36,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:41:36,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:41:36,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:41:36,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-14 13:41:36,374 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:41:36,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:41:36,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1522594155, now seen corresponding path program 10 times [2024-06-14 13:41:36,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:41:36,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143200286] [2024-06-14 13:41:36,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:41:36,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:41:36,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:41:40,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:41:40,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:41:40,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143200286] [2024-06-14 13:41:40,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143200286] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:41:40,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:41:40,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:41:40,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177092273] [2024-06-14 13:41:40,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:41:40,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:41:40,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:41:40,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:41:40,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:41:40,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 55 [2024-06-14 13:41:40,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 230 transitions, 2839 flow. Second operand has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:41:40,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:41:40,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 55 [2024-06-14 13:41:40,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:41:45,258 INFO L124 PetriNetUnfolderBase]: 9963/14387 cut-off events. [2024-06-14 13:41:45,258 INFO L125 PetriNetUnfolderBase]: For 505532/505911 co-relation queries the response was YES. [2024-06-14 13:41:45,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94794 conditions, 14387 events. 9963/14387 cut-off events. For 505532/505911 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 84140 event pairs, 3126 based on Foata normal form. 180/14550 useless extension candidates. Maximal degree in co-relation 94713. Up to 13157 conditions per place. [2024-06-14 13:41:45,383 INFO L140 encePairwiseOnDemand]: 42/55 looper letters, 231 selfloop transitions, 70 changer transitions 0/311 dead transitions. [2024-06-14 13:41:45,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 311 transitions, 3678 flow [2024-06-14 13:41:45,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:41:45,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:41:45,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 270 transitions. [2024-06-14 13:41:45,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4909090909090909 [2024-06-14 13:41:45,386 INFO L175 Difference]: Start difference. First operand has 173 places, 230 transitions, 2839 flow. Second operand 10 states and 270 transitions. [2024-06-14 13:41:45,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 311 transitions, 3678 flow [2024-06-14 13:41:46,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 311 transitions, 3367 flow, removed 38 selfloop flow, removed 8 redundant places. [2024-06-14 13:41:46,171 INFO L231 Difference]: Finished difference. Result has 175 places, 231 transitions, 2712 flow [2024-06-14 13:41:46,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=2538, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2712, PETRI_PLACES=175, PETRI_TRANSITIONS=231} [2024-06-14 13:41:46,172 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 117 predicate places. [2024-06-14 13:41:46,172 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 231 transitions, 2712 flow [2024-06-14 13:41:46,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:41:46,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:41:46,172 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:41:46,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-14 13:41:46,172 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:41:46,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:41:46,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1247589401, now seen corresponding path program 2 times [2024-06-14 13:41:46,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:41:46,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850451921] [2024-06-14 13:41:46,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:41:46,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:41:46,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:41:50,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:41:50,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:41:50,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850451921] [2024-06-14 13:41:50,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850451921] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:41:50,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:41:50,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:41:50,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774616461] [2024-06-14 13:41:50,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:41:50,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:41:50,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:41:50,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:41:50,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:41:50,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 55 [2024-06-14 13:41:50,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 231 transitions, 2712 flow. Second operand has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:41:50,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:41:50,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 55 [2024-06-14 13:41:50,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:41:54,834 INFO L124 PetriNetUnfolderBase]: 10265/14878 cut-off events. [2024-06-14 13:41:54,834 INFO L125 PetriNetUnfolderBase]: For 500586/501193 co-relation queries the response was YES. [2024-06-14 13:41:54,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96421 conditions, 14878 events. 10265/14878 cut-off events. For 500586/501193 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 87985 event pairs, 3153 based on Foata normal form. 177/15030 useless extension candidates. Maximal degree in co-relation 96341. Up to 13602 conditions per place. [2024-06-14 13:41:54,948 INFO L140 encePairwiseOnDemand]: 42/55 looper letters, 240 selfloop transitions, 71 changer transitions 0/321 dead transitions. [2024-06-14 13:41:54,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 321 transitions, 3617 flow [2024-06-14 13:41:54,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:41:54,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:41:54,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 291 transitions. [2024-06-14 13:41:54,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4809917355371901 [2024-06-14 13:41:54,950 INFO L175 Difference]: Start difference. First operand has 175 places, 231 transitions, 2712 flow. Second operand 11 states and 291 transitions. [2024-06-14 13:41:54,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 321 transitions, 3617 flow [2024-06-14 13:41:55,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 321 transitions, 3467 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-14 13:41:55,433 INFO L231 Difference]: Finished difference. Result has 178 places, 233 transitions, 2767 flow [2024-06-14 13:41:55,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=2562, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2767, PETRI_PLACES=178, PETRI_TRANSITIONS=233} [2024-06-14 13:41:55,434 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 120 predicate places. [2024-06-14 13:41:55,434 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 233 transitions, 2767 flow [2024-06-14 13:41:55,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:41:55,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:41:55,434 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:41:55,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-14 13:41:55,434 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:41:55,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:41:55,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1321030233, now seen corresponding path program 3 times [2024-06-14 13:41:55,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:41:55,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311554010] [2024-06-14 13:41:55,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:41:55,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:41:55,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:41:58,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:41:58,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:41:58,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311554010] [2024-06-14 13:41:58,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311554010] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:41:58,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:41:58,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:41:58,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284468328] [2024-06-14 13:41:58,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:41:58,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:41:58,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:41:58,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:41:58,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:41:59,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 55 [2024-06-14 13:41:59,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 233 transitions, 2767 flow. Second operand has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:41:59,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:41:59,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 55 [2024-06-14 13:41:59,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:42:03,292 INFO L124 PetriNetUnfolderBase]: 10377/15054 cut-off events. [2024-06-14 13:42:03,292 INFO L125 PetriNetUnfolderBase]: For 536420/537045 co-relation queries the response was YES. [2024-06-14 13:42:03,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98840 conditions, 15054 events. 10377/15054 cut-off events. For 536420/537045 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 88950 event pairs, 2981 based on Foata normal form. 177/15206 useless extension candidates. Maximal degree in co-relation 98759. Up to 12290 conditions per place. [2024-06-14 13:42:03,415 INFO L140 encePairwiseOnDemand]: 42/55 looper letters, 216 selfloop transitions, 93 changer transitions 0/319 dead transitions. [2024-06-14 13:42:03,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 319 transitions, 3842 flow [2024-06-14 13:42:03,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:42:03,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:42:03,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 269 transitions. [2024-06-14 13:42:03,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4890909090909091 [2024-06-14 13:42:03,417 INFO L175 Difference]: Start difference. First operand has 178 places, 233 transitions, 2767 flow. Second operand 10 states and 269 transitions. [2024-06-14 13:42:03,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 319 transitions, 3842 flow [2024-06-14 13:42:03,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 319 transitions, 3665 flow, removed 19 selfloop flow, removed 9 redundant places. [2024-06-14 13:42:03,922 INFO L231 Difference]: Finished difference. Result has 179 places, 237 transitions, 2897 flow [2024-06-14 13:42:03,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=2590, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2897, PETRI_PLACES=179, PETRI_TRANSITIONS=237} [2024-06-14 13:42:03,922 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 121 predicate places. [2024-06-14 13:42:03,922 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 237 transitions, 2897 flow [2024-06-14 13:42:03,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:42:03,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:42:03,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:42:03,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-14 13:42:03,923 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:42:03,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:42:03,923 INFO L85 PathProgramCache]: Analyzing trace with hash 873672137, now seen corresponding path program 4 times [2024-06-14 13:42:03,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:42:03,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963315226] [2024-06-14 13:42:03,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:42:03,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:42:03,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:42:08,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:42:08,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:42:08,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963315226] [2024-06-14 13:42:08,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963315226] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:42:08,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:42:08,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:42:08,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700366169] [2024-06-14 13:42:08,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:42:08,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:42:08,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:42:08,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:42:08,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:42:08,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 55 [2024-06-14 13:42:08,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 237 transitions, 2897 flow. Second operand has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:42:08,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:42:08,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 55 [2024-06-14 13:42:08,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:42:13,274 INFO L124 PetriNetUnfolderBase]: 10142/14694 cut-off events. [2024-06-14 13:42:13,274 INFO L125 PetriNetUnfolderBase]: For 554610/555017 co-relation queries the response was YES. [2024-06-14 13:42:13,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97260 conditions, 14694 events. 10142/14694 cut-off events. For 554610/555017 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 86409 event pairs, 3087 based on Foata normal form. 161/14838 useless extension candidates. Maximal degree in co-relation 97178. Up to 12690 conditions per place. [2024-06-14 13:42:13,384 INFO L140 encePairwiseOnDemand]: 42/55 looper letters, 225 selfloop transitions, 84 changer transitions 0/319 dead transitions. [2024-06-14 13:42:13,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 319 transitions, 3668 flow [2024-06-14 13:42:13,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:42:13,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:42:13,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 271 transitions. [2024-06-14 13:42:13,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49272727272727274 [2024-06-14 13:42:13,386 INFO L175 Difference]: Start difference. First operand has 179 places, 237 transitions, 2897 flow. Second operand 10 states and 271 transitions. [2024-06-14 13:42:13,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 319 transitions, 3668 flow [2024-06-14 13:42:13,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 319 transitions, 3538 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-14 13:42:13,885 INFO L231 Difference]: Finished difference. Result has 182 places, 236 transitions, 2877 flow [2024-06-14 13:42:13,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=2699, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2877, PETRI_PLACES=182, PETRI_TRANSITIONS=236} [2024-06-14 13:42:13,885 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 124 predicate places. [2024-06-14 13:42:13,885 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 236 transitions, 2877 flow [2024-06-14 13:42:13,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:42:13,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:42:13,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:42:13,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-14 13:42:13,886 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:42:13,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:42:13,886 INFO L85 PathProgramCache]: Analyzing trace with hash -670980980, now seen corresponding path program 1 times [2024-06-14 13:42:13,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:42:13,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204360295] [2024-06-14 13:42:13,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:42:13,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:42:13,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:42:17,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:42:17,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:42:17,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204360295] [2024-06-14 13:42:17,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204360295] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:42:17,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:42:17,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:42:17,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745743353] [2024-06-14 13:42:17,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:42:17,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:42:17,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:42:17,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:42:17,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:42:17,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 55 [2024-06-14 13:42:17,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 236 transitions, 2877 flow. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:42:17,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:42:17,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 55 [2024-06-14 13:42:17,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:42:21,271 INFO L124 PetriNetUnfolderBase]: 10972/15781 cut-off events. [2024-06-14 13:42:21,271 INFO L125 PetriNetUnfolderBase]: For 557697/557704 co-relation queries the response was YES. [2024-06-14 13:42:21,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99574 conditions, 15781 events. 10972/15781 cut-off events. For 557697/557704 co-relation queries the response was YES. Maximal size of possible extension queue 556. Compared 92459 event pairs, 3693 based on Foata normal form. 8/15785 useless extension candidates. Maximal degree in co-relation 99490. Up to 14969 conditions per place. [2024-06-14 13:42:21,435 INFO L140 encePairwiseOnDemand]: 44/55 looper letters, 265 selfloop transitions, 42 changer transitions 0/314 dead transitions. [2024-06-14 13:42:21,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 314 transitions, 4128 flow [2024-06-14 13:42:21,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:42:21,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:42:21,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-14 13:42:21,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4597402597402597 [2024-06-14 13:42:21,437 INFO L175 Difference]: Start difference. First operand has 182 places, 236 transitions, 2877 flow. Second operand 7 states and 177 transitions. [2024-06-14 13:42:21,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 314 transitions, 4128 flow [2024-06-14 13:42:22,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 314 transitions, 3881 flow, removed 15 selfloop flow, removed 9 redundant places. [2024-06-14 13:42:22,198 INFO L231 Difference]: Finished difference. Result has 182 places, 265 transitions, 3113 flow [2024-06-14 13:42:22,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=2646, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3113, PETRI_PLACES=182, PETRI_TRANSITIONS=265} [2024-06-14 13:42:22,198 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 124 predicate places. [2024-06-14 13:42:22,199 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 265 transitions, 3113 flow [2024-06-14 13:42:22,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:42:22,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:42:22,199 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:42:22,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-14 13:42:22,199 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:42:22,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:42:22,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1319316776, now seen corresponding path program 2 times [2024-06-14 13:42:22,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:42:22,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481741406] [2024-06-14 13:42:22,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:42:22,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:42:22,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:42:25,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:42:25,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:42:25,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481741406] [2024-06-14 13:42:25,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481741406] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:42:25,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:42:25,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:42:25,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589551925] [2024-06-14 13:42:25,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:42:25,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:42:25,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:42:25,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:42:25,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:42:25,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 55 [2024-06-14 13:42:25,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 265 transitions, 3113 flow. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:42:25,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:42:25,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 55 [2024-06-14 13:42:25,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:42:30,120 INFO L124 PetriNetUnfolderBase]: 11010/15837 cut-off events. [2024-06-14 13:42:30,120 INFO L125 PetriNetUnfolderBase]: For 581195/581202 co-relation queries the response was YES. [2024-06-14 13:42:30,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101665 conditions, 15837 events. 11010/15837 cut-off events. For 581195/581202 co-relation queries the response was YES. Maximal size of possible extension queue 556. Compared 92681 event pairs, 3693 based on Foata normal form. 8/15841 useless extension candidates. Maximal degree in co-relation 101578. Up to 15003 conditions per place. [2024-06-14 13:42:30,245 INFO L140 encePairwiseOnDemand]: 45/55 looper letters, 258 selfloop transitions, 47 changer transitions 0/312 dead transitions. [2024-06-14 13:42:30,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 312 transitions, 4075 flow [2024-06-14 13:42:30,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:42:30,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:42:30,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-14 13:42:30,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4727272727272727 [2024-06-14 13:42:30,247 INFO L175 Difference]: Start difference. First operand has 182 places, 265 transitions, 3113 flow. Second operand 6 states and 156 transitions. [2024-06-14 13:42:30,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 312 transitions, 4075 flow [2024-06-14 13:42:30,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 312 transitions, 4011 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-14 13:42:30,967 INFO L231 Difference]: Finished difference. Result has 186 places, 272 transitions, 3271 flow [2024-06-14 13:42:30,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=3051, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3271, PETRI_PLACES=186, PETRI_TRANSITIONS=272} [2024-06-14 13:42:30,968 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 128 predicate places. [2024-06-14 13:42:30,968 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 272 transitions, 3271 flow [2024-06-14 13:42:30,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:42:30,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:42:30,968 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:42:30,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-14 13:42:30,969 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:42:30,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:42:30,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1318838756, now seen corresponding path program 3 times [2024-06-14 13:42:30,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:42:30,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267917102] [2024-06-14 13:42:30,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:42:30,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:42:30,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:42:34,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:42:34,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:42:34,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267917102] [2024-06-14 13:42:34,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267917102] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:42:34,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:42:34,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:42:34,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997041871] [2024-06-14 13:42:34,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:42:34,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:42:34,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:42:34,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:42:34,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:42:34,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 55 [2024-06-14 13:42:34,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 272 transitions, 3271 flow. Second operand has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:42:34,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:42:34,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 55 [2024-06-14 13:42:34,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:42:38,387 INFO L124 PetriNetUnfolderBase]: 10575/15345 cut-off events. [2024-06-14 13:42:38,387 INFO L125 PetriNetUnfolderBase]: For 609013/609179 co-relation queries the response was YES. [2024-06-14 13:42:38,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99884 conditions, 15345 events. 10575/15345 cut-off events. For 609013/609179 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 91107 event pairs, 3692 based on Foata normal form. 152/15458 useless extension candidates. Maximal degree in co-relation 99795. Up to 14413 conditions per place. [2024-06-14 13:42:38,540 INFO L140 encePairwiseOnDemand]: 45/55 looper letters, 236 selfloop transitions, 46 changer transitions 0/297 dead transitions. [2024-06-14 13:42:38,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 297 transitions, 3911 flow [2024-06-14 13:42:38,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:42:38,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:42:38,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-14 13:42:38,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44545454545454544 [2024-06-14 13:42:38,542 INFO L175 Difference]: Start difference. First operand has 186 places, 272 transitions, 3271 flow. Second operand 6 states and 147 transitions. [2024-06-14 13:42:38,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 297 transitions, 3911 flow [2024-06-14 13:42:39,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 297 transitions, 3812 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-14 13:42:39,316 INFO L231 Difference]: Finished difference. Result has 188 places, 273 transitions, 3281 flow [2024-06-14 13:42:39,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=3173, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3281, PETRI_PLACES=188, PETRI_TRANSITIONS=273} [2024-06-14 13:42:39,316 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 130 predicate places. [2024-06-14 13:42:39,316 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 273 transitions, 3281 flow [2024-06-14 13:42:39,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:42:39,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:42:39,317 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:42:39,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-14 13:42:39,317 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:42:39,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:42:39,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1821957236, now seen corresponding path program 1 times [2024-06-14 13:42:39,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:42:39,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960100304] [2024-06-14 13:42:39,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:42:39,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:42:39,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:42:42,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:42:42,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:42:42,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960100304] [2024-06-14 13:42:42,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960100304] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:42:42,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:42:42,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:42:42,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841312408] [2024-06-14 13:42:42,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:42:42,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:42:42,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:42:42,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:42:42,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:42:42,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 55 [2024-06-14 13:42:42,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 273 transitions, 3281 flow. Second operand has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:42:42,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:42:42,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 55 [2024-06-14 13:42:42,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:42:46,177 INFO L124 PetriNetUnfolderBase]: 10161/14753 cut-off events. [2024-06-14 13:42:46,177 INFO L125 PetriNetUnfolderBase]: For 605719/607202 co-relation queries the response was YES. [2024-06-14 13:42:46,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99231 conditions, 14753 events. 10161/14753 cut-off events. For 605719/607202 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 87632 event pairs, 2979 based on Foata normal form. 86/14620 useless extension candidates. Maximal degree in co-relation 99142. Up to 14009 conditions per place. [2024-06-14 13:42:46,313 INFO L140 encePairwiseOnDemand]: 45/55 looper letters, 261 selfloop transitions, 34 changer transitions 0/310 dead transitions. [2024-06-14 13:42:46,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 310 transitions, 4225 flow [2024-06-14 13:42:46,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:42:46,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:42:46,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-14 13:42:46,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4636363636363636 [2024-06-14 13:42:46,316 INFO L175 Difference]: Start difference. First operand has 188 places, 273 transitions, 3281 flow. Second operand 6 states and 153 transitions. [2024-06-14 13:42:46,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 310 transitions, 4225 flow [2024-06-14 13:42:47,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 310 transitions, 4155 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-14 13:42:47,075 INFO L231 Difference]: Finished difference. Result has 191 places, 281 transitions, 3432 flow [2024-06-14 13:42:47,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=3211, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3432, PETRI_PLACES=191, PETRI_TRANSITIONS=281} [2024-06-14 13:42:47,076 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 133 predicate places. [2024-06-14 13:42:47,076 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 281 transitions, 3432 flow [2024-06-14 13:42:47,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:42:47,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:42:47,076 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:42:47,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-14 13:42:47,077 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:42:47,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:42:47,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1374654294, now seen corresponding path program 2 times [2024-06-14 13:42:47,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:42:47,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130321282] [2024-06-14 13:42:47,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:42:47,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:42:47,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:42:49,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:42:49,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:42:49,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130321282] [2024-06-14 13:42:49,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130321282] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:42:49,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:42:49,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:42:49,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985502813] [2024-06-14 13:42:49,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:42:49,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:42:49,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:42:49,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:42:49,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:42:49,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 55 [2024-06-14 13:42:49,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 281 transitions, 3432 flow. Second operand has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:42:49,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:42:49,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 55 [2024-06-14 13:42:49,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:42:53,505 INFO L124 PetriNetUnfolderBase]: 10154/14744 cut-off events. [2024-06-14 13:42:53,505 INFO L125 PetriNetUnfolderBase]: For 644332/645839 co-relation queries the response was YES. [2024-06-14 13:42:53,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101684 conditions, 14744 events. 10154/14744 cut-off events. For 644332/645839 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 87523 event pairs, 2979 based on Foata normal form. 84/14610 useless extension candidates. Maximal degree in co-relation 101593. Up to 14013 conditions per place. [2024-06-14 13:42:53,633 INFO L140 encePairwiseOnDemand]: 45/55 looper letters, 258 selfloop transitions, 30 changer transitions 0/303 dead transitions. [2024-06-14 13:42:53,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 303 transitions, 4062 flow [2024-06-14 13:42:53,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:42:53,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:42:53,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2024-06-14 13:42:53,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4727272727272727 [2024-06-14 13:42:53,635 INFO L175 Difference]: Start difference. First operand has 191 places, 281 transitions, 3432 flow. Second operand 5 states and 130 transitions. [2024-06-14 13:42:53,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 303 transitions, 4062 flow [2024-06-14 13:42:54,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 303 transitions, 3939 flow, removed 50 selfloop flow, removed 2 redundant places. [2024-06-14 13:42:54,237 INFO L231 Difference]: Finished difference. Result has 194 places, 281 transitions, 3385 flow [2024-06-14 13:42:54,237 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=3309, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3385, PETRI_PLACES=194, PETRI_TRANSITIONS=281} [2024-06-14 13:42:54,238 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 136 predicate places. [2024-06-14 13:42:54,238 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 281 transitions, 3385 flow [2024-06-14 13:42:54,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:42:54,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:42:54,238 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:42:54,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-14 13:42:54,239 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:42:54,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:42:54,239 INFO L85 PathProgramCache]: Analyzing trace with hash 1318853636, now seen corresponding path program 1 times [2024-06-14 13:42:54,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:42:54,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338387834] [2024-06-14 13:42:54,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:42:54,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:42:54,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:42:57,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:42:57,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:42:57,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338387834] [2024-06-14 13:42:57,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338387834] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:42:57,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:42:57,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:42:57,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111145140] [2024-06-14 13:42:57,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:42:57,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:42:57,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:42:57,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:42:57,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:42:57,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 55 [2024-06-14 13:42:57,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 281 transitions, 3385 flow. Second operand has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:42:57,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:42:57,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 55 [2024-06-14 13:42:57,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:43:01,301 INFO L124 PetriNetUnfolderBase]: 10569/15361 cut-off events. [2024-06-14 13:43:01,302 INFO L125 PetriNetUnfolderBase]: For 664947/665022 co-relation queries the response was YES. [2024-06-14 13:43:01,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102716 conditions, 15361 events. 10569/15361 cut-off events. For 664947/665022 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 91490 event pairs, 3566 based on Foata normal form. 83/15414 useless extension candidates. Maximal degree in co-relation 102623. Up to 14540 conditions per place. [2024-06-14 13:43:01,455 INFO L140 encePairwiseOnDemand]: 46/55 looper letters, 276 selfloop transitions, 18 changer transitions 0/309 dead transitions. [2024-06-14 13:43:01,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 309 transitions, 4073 flow [2024-06-14 13:43:01,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:43:01,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:43:01,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-14 13:43:01,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4393939393939394 [2024-06-14 13:43:01,457 INFO L175 Difference]: Start difference. First operand has 194 places, 281 transitions, 3385 flow. Second operand 6 states and 145 transitions. [2024-06-14 13:43:01,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 309 transitions, 4073 flow