./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe018_power.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/safe018_power.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 76401ed0 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe018_power.opt.i ./goblint.2024-05-21_14-57-05.files/protection/safe018_power.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-76401ed-m [2024-06-20 17:13:33,994 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-20 17:13:34,051 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-20 17:13:34,055 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-20 17:13:34,055 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-20 17:13:34,083 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-20 17:13:34,083 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-20 17:13:34,084 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-20 17:13:34,084 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-20 17:13:34,087 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-20 17:13:34,088 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-20 17:13:34,088 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-20 17:13:34,088 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-20 17:13:34,089 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-20 17:13:34,090 INFO L153 SettingsManager]: * Use SBE=true [2024-06-20 17:13:34,090 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-20 17:13:34,090 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-20 17:13:34,090 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-20 17:13:34,091 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-20 17:13:34,091 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-20 17:13:34,091 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-20 17:13:34,091 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-20 17:13:34,092 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-20 17:13:34,092 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-20 17:13:34,092 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-20 17:13:34,092 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-20 17:13:34,092 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-20 17:13:34,093 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-20 17:13:34,093 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-20 17:13:34,094 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-20 17:13:34,095 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-20 17:13:34,095 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-20 17:13:34,095 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 17:13:34,096 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-20 17:13:34,096 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-20 17:13:34,096 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-20 17:13:34,096 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-20 17:13:34,096 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-20 17:13:34,097 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-20 17:13:34,097 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-20 17:13:34,097 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-20 17:13:34,097 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-20 17:13:34,097 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-20 17:13:34,098 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-20 17:13:34,325 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-20 17:13:34,347 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-20 17:13:34,349 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-20 17:13:34,351 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-20 17:13:34,351 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-20 17:13:34,352 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe018_power.opt.yml/witness.yml [2024-06-20 17:13:34,556 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-20 17:13:34,556 INFO L274 PluginConnector]: CDTParser initialized [2024-06-20 17:13:34,557 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe018_power.opt.i [2024-06-20 17:13:35,593 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-20 17:13:35,770 INFO L384 CDTParser]: Found 1 translation units. [2024-06-20 17:13:35,770 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe018_power.opt.i [2024-06-20 17:13:35,783 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3eceee5e7/b90fd14e79394dd9abd300d3cbe03179/FLAG07ad33839 [2024-06-20 17:13:35,793 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3eceee5e7/b90fd14e79394dd9abd300d3cbe03179 [2024-06-20 17:13:35,794 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-20 17:13:35,794 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-20 17:13:35,795 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-20 17:13:35,795 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-20 17:13:35,799 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-20 17:13:35,799 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 05:13:34" (1/2) ... [2024-06-20 17:13:35,800 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a08fed9 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:13:35, skipping insertion in model container [2024-06-20 17:13:35,800 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 05:13:34" (1/2) ... [2024-06-20 17:13:35,801 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4de00a1 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:13:35, skipping insertion in model container [2024-06-20 17:13:35,801 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 05:13:35" (2/2) ... [2024-06-20 17:13:35,802 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a08fed9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:13:35, skipping insertion in model container [2024-06-20 17:13:35,802 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 05:13:35" (2/2) ... [2024-06-20 17:13:35,802 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-20 17:13:35,906 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-20 17:13:35,907 INFO L97 edCorrectnessWitness]: Location invariant before [L864-L864] ((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (((0 <= *__unbuffered_p2_EAX$read_delayed_var && *__unbuffered_p2_EAX$read_delayed_var <= 1) && __unbuffered_p2_EAX$read_delayed_var == & x) && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1))))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)))) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff1 && x$w_buff1 <= 1) && (x$w_buff1 == 0 || x$w_buff1 == 1)))) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff0 && x$w_buff0 <= 1) && (x$w_buff0 == 0 || x$w_buff0 == 1))) [2024-06-20 17:13:35,908 INFO L97 edCorrectnessWitness]: Location invariant before [L862-L862] ((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (((0 <= *__unbuffered_p2_EAX$read_delayed_var && *__unbuffered_p2_EAX$read_delayed_var <= 1) && __unbuffered_p2_EAX$read_delayed_var == & x) && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1))))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)))) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff1 && x$w_buff1 <= 1) && (x$w_buff1 == 0 || x$w_buff1 == 1)))) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff0 && x$w_buff0 <= 1) && (x$w_buff0 == 0 || x$w_buff0 == 1))) [2024-06-20 17:13:35,908 INFO L97 edCorrectnessWitness]: Location invariant before [L865-L865] ((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (((0 <= *__unbuffered_p2_EAX$read_delayed_var && *__unbuffered_p2_EAX$read_delayed_var <= 1) && __unbuffered_p2_EAX$read_delayed_var == & x) && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1))))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)))) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff1 && x$w_buff1 <= 1) && (x$w_buff1 == 0 || x$w_buff1 == 1)))) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff0 && x$w_buff0 <= 1) && (x$w_buff0 == 0 || x$w_buff0 == 1))) [2024-06-20 17:13:35,908 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-20 17:13:35,908 INFO L106 edCorrectnessWitness]: ghost_update [L860-L860] multithreaded = 1; [2024-06-20 17:13:35,944 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-20 17:13:36,287 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 17:13:36,297 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-20 17:13:36,411 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 17:13:36,455 INFO L206 MainTranslator]: Completed translation [2024-06-20 17:13:36,455 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:13:36 WrapperNode [2024-06-20 17:13:36,456 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-20 17:13:36,456 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-20 17:13:36,457 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-20 17:13:36,457 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-20 17:13:36,462 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:13:36" (1/1) ... [2024-06-20 17:13:36,491 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:13:36" (1/1) ... [2024-06-20 17:13:36,536 INFO L138 Inliner]: procedures = 175, calls = 88, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 251 [2024-06-20 17:13:36,536 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-20 17:13:36,537 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-20 17:13:36,537 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-20 17:13:36,537 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-20 17:13:36,551 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:13:36" (1/1) ... [2024-06-20 17:13:36,551 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:13:36" (1/1) ... [2024-06-20 17:13:36,557 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:13:36" (1/1) ... [2024-06-20 17:13:36,575 INFO L175 MemorySlicer]: Split 48 memory accesses to 2 slices as follows [2, 46]. 96 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 7 writes are split as follows [0, 7]. [2024-06-20 17:13:36,576 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:13:36" (1/1) ... [2024-06-20 17:13:36,576 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:13:36" (1/1) ... [2024-06-20 17:13:36,593 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:13:36" (1/1) ... [2024-06-20 17:13:36,595 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:13:36" (1/1) ... [2024-06-20 17:13:36,610 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:13:36" (1/1) ... [2024-06-20 17:13:36,612 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:13:36" (1/1) ... [2024-06-20 17:13:36,616 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-20 17:13:36,616 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-20 17:13:36,617 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-20 17:13:36,617 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-20 17:13:36,617 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:13:36" (1/1) ... [2024-06-20 17:13:36,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 17:13:36,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-20 17:13:36,669 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-20 17:13:36,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-20 17:13:36,702 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-20 17:13:36,702 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-20 17:13:36,702 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-20 17:13:36,702 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-20 17:13:36,703 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-20 17:13:36,703 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-20 17:13:36,703 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-20 17:13:36,703 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-20 17:13:36,703 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-20 17:13:36,703 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-20 17:13:36,704 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-20 17:13:36,704 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-20 17:13:36,704 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-20 17:13:36,704 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-20 17:13:36,705 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-20 17:13:36,705 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-20 17:13:36,706 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-20 17:13:36,707 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-20 17:13:36,849 INFO L244 CfgBuilder]: Building ICFG [2024-06-20 17:13:36,851 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-20 17:13:37,299 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-20 17:13:37,299 INFO L293 CfgBuilder]: Performing block encoding [2024-06-20 17:13:37,692 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-20 17:13:37,692 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-20 17:13:37,692 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 05:13:37 BoogieIcfgContainer [2024-06-20 17:13:37,692 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-20 17:13:37,694 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-20 17:13:37,694 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-20 17:13:37,697 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-20 17:13:37,697 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 05:13:34" (1/4) ... [2024-06-20 17:13:37,697 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c5d60c1 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 05:13:37, skipping insertion in model container [2024-06-20 17:13:37,697 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.06 05:13:35" (2/4) ... [2024-06-20 17:13:37,698 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c5d60c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 05:13:37, skipping insertion in model container [2024-06-20 17:13:37,698 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:13:36" (3/4) ... [2024-06-20 17:13:37,698 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c5d60c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 05:13:37, skipping insertion in model container [2024-06-20 17:13:37,698 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 05:13:37" (4/4) ... [2024-06-20 17:13:37,699 INFO L112 eAbstractionObserver]: Analyzing ICFG safe018_power.opt.i [2024-06-20 17:13:37,714 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-20 17:13:37,714 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-20 17:13:37,714 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-20 17:13:37,773 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-20 17:13:37,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-20 17:13:37,832 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-20 17:13:37,833 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 17:13:37,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 38 events. 0/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 54 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-20 17:13:37,834 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-20 17:13:37,837 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-20 17:13:37,848 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-20 17:13:37,854 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;@14683194, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-20 17:13:37,854 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-20 17:13:37,858 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-20 17:13:37,858 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-20 17:13:37,859 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 17:13:37,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:13:37,859 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-20 17:13:37,860 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:13:37,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:13:37,926 INFO L85 PathProgramCache]: Analyzing trace with hash 884603327, now seen corresponding path program 1 times [2024-06-20 17:13:37,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:13:37,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668609158] [2024-06-20 17:13:37,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:13:37,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:13:38,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:13:39,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:13:39,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:13:39,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668609158] [2024-06-20 17:13:39,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668609158] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:13:39,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:13:39,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-20 17:13:39,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266650598] [2024-06-20 17:13:39,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:13:39,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-20 17:13:39,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:13:39,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-20 17:13:39,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-20 17:13:39,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:13:39,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:13:39,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:13:39,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:13:39,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:13:39,996 INFO L124 PetriNetUnfolderBase]: 897/1380 cut-off events. [2024-06-20 17:13:39,996 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2024-06-20 17:13:40,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2807 conditions, 1380 events. 897/1380 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 6402 event pairs, 455 based on Foata normal form. 2/1357 useless extension candidates. Maximal degree in co-relation 2795. Up to 1343 conditions per place. [2024-06-20 17:13:40,009 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 35 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2024-06-20 17:13:40,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 45 transitions, 183 flow [2024-06-20 17:13:40,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-20 17:13:40,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-20 17:13:40,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 69 transitions. [2024-06-20 17:13:40,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-20 17:13:40,020 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 69 transitions. [2024-06-20 17:13:40,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 45 transitions, 183 flow [2024-06-20 17:13:40,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 45 transitions, 178 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-20 17:13:40,025 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-20 17:13:40,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2024-06-20 17:13:40,029 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-20 17:13:40,030 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-20 17:13:40,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:13:40,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:13:40,030 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:13:40,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-20 17:13:40,030 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:13:40,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:13:40,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1890999986, now seen corresponding path program 1 times [2024-06-20 17:13:40,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:13:40,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589143804] [2024-06-20 17:13:40,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:13:40,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:13:40,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:13:42,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:13:42,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:13:42,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589143804] [2024-06-20 17:13:42,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589143804] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:13:42,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:13:42,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 17:13:42,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124610510] [2024-06-20 17:13:42,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:13:42,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:13:42,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:13:42,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:13:42,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:13:42,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:13:42,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 100 flow. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:13:42,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:13:42,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:13:42,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:13:42,895 INFO L124 PetriNetUnfolderBase]: 1139/1737 cut-off events. [2024-06-20 17:13:42,895 INFO L125 PetriNetUnfolderBase]: For 335/335 co-relation queries the response was YES. [2024-06-20 17:13:42,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4020 conditions, 1737 events. 1139/1737 cut-off events. For 335/335 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 7808 event pairs, 393 based on Foata normal form. 6/1738 useless extension candidates. Maximal degree in co-relation 4008. Up to 1639 conditions per place. [2024-06-20 17:13:42,902 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 42 selfloop transitions, 6 changer transitions 0/53 dead transitions. [2024-06-20 17:13:42,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 53 transitions, 240 flow [2024-06-20 17:13:42,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 17:13:42,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 17:13:42,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 83 transitions. [2024-06-20 17:13:42,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5060975609756098 [2024-06-20 17:13:42,905 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 83 transitions. [2024-06-20 17:13:42,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 53 transitions, 240 flow [2024-06-20 17:13:42,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 53 transitions, 236 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-20 17:13:42,907 INFO L231 Difference]: Finished difference. Result has 44 places, 36 transitions, 123 flow [2024-06-20 17:13:42,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=123, PETRI_PLACES=44, PETRI_TRANSITIONS=36} [2024-06-20 17:13:42,907 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 2 predicate places. [2024-06-20 17:13:42,908 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 36 transitions, 123 flow [2024-06-20 17:13:42,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:13:42,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:13:42,908 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:13:42,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-20 17:13:42,909 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:13:42,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:13:42,909 INFO L85 PathProgramCache]: Analyzing trace with hash -810500594, now seen corresponding path program 1 times [2024-06-20 17:13:42,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:13:42,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340337087] [2024-06-20 17:13:42,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:13:42,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:13:42,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:13:44,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:13:44,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:13:44,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340337087] [2024-06-20 17:13:44,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340337087] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:13:44,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:13:44,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 17:13:44,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472901495] [2024-06-20 17:13:44,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:13:44,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:13:44,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:13:44,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:13:44,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:13:44,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:13:44,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 36 transitions, 123 flow. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:13:44,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:13:44,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:13:44,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:13:44,949 INFO L124 PetriNetUnfolderBase]: 896/1390 cut-off events. [2024-06-20 17:13:44,949 INFO L125 PetriNetUnfolderBase]: For 756/756 co-relation queries the response was YES. [2024-06-20 17:13:44,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3510 conditions, 1390 events. 896/1390 cut-off events. For 756/756 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 6422 event pairs, 389 based on Foata normal form. 4/1391 useless extension candidates. Maximal degree in co-relation 3495. Up to 1337 conditions per place. [2024-06-20 17:13:44,957 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 44 selfloop transitions, 8 changer transitions 0/57 dead transitions. [2024-06-20 17:13:44,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 57 transitions, 289 flow [2024-06-20 17:13:44,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 17:13:44,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 17:13:44,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 89 transitions. [2024-06-20 17:13:44,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43414634146341463 [2024-06-20 17:13:44,960 INFO L175 Difference]: Start difference. First operand has 44 places, 36 transitions, 123 flow. Second operand 5 states and 89 transitions. [2024-06-20 17:13:44,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 57 transitions, 289 flow [2024-06-20 17:13:44,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 57 transitions, 272 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-20 17:13:44,963 INFO L231 Difference]: Finished difference. Result has 48 places, 42 transitions, 172 flow [2024-06-20 17:13:44,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=172, PETRI_PLACES=48, PETRI_TRANSITIONS=42} [2024-06-20 17:13:44,964 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 6 predicate places. [2024-06-20 17:13:44,965 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 42 transitions, 172 flow [2024-06-20 17:13:44,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:13:44,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:13:44,965 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:13:44,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-20 17:13:44,965 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:13:44,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:13:44,966 INFO L85 PathProgramCache]: Analyzing trace with hash 644287143, now seen corresponding path program 1 times [2024-06-20 17:13:44,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:13:44,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087704105] [2024-06-20 17:13:44,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:13:44,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:13:44,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:13:46,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:13:46,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:13:46,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087704105] [2024-06-20 17:13:46,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087704105] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:13:46,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:13:46,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:13:46,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637240670] [2024-06-20 17:13:46,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:13:46,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:13:46,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:13:46,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:13:46,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:13:46,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:13:46,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 42 transitions, 172 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:13:46,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:13:46,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:13:46,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:13:47,442 INFO L124 PetriNetUnfolderBase]: 904/1402 cut-off events. [2024-06-20 17:13:47,442 INFO L125 PetriNetUnfolderBase]: For 1437/1437 co-relation queries the response was YES. [2024-06-20 17:13:47,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4057 conditions, 1402 events. 904/1402 cut-off events. For 1437/1437 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 6449 event pairs, 371 based on Foata normal form. 4/1403 useless extension candidates. Maximal degree in co-relation 4039. Up to 1327 conditions per place. [2024-06-20 17:13:47,450 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 49 selfloop transitions, 12 changer transitions 0/66 dead transitions. [2024-06-20 17:13:47,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 66 transitions, 364 flow [2024-06-20 17:13:47,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:13:47,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:13:47,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-20 17:13:47,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43089430894308944 [2024-06-20 17:13:47,454 INFO L175 Difference]: Start difference. First operand has 48 places, 42 transitions, 172 flow. Second operand 6 states and 106 transitions. [2024-06-20 17:13:47,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 66 transitions, 364 flow [2024-06-20 17:13:47,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 66 transitions, 350 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-20 17:13:47,459 INFO L231 Difference]: Finished difference. Result has 52 places, 46 transitions, 219 flow [2024-06-20 17:13:47,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=219, PETRI_PLACES=52, PETRI_TRANSITIONS=46} [2024-06-20 17:13:47,460 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 10 predicate places. [2024-06-20 17:13:47,460 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 46 transitions, 219 flow [2024-06-20 17:13:47,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:13:47,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:13:47,461 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:13:47,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-20 17:13:47,462 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:13:47,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:13:47,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1501933235, now seen corresponding path program 1 times [2024-06-20 17:13:47,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:13:47,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871708042] [2024-06-20 17:13:47,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:13:47,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:13:47,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:13:49,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:13:49,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:13:49,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871708042] [2024-06-20 17:13:49,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871708042] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:13:49,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:13:49,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:13:49,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137925922] [2024-06-20 17:13:49,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:13:49,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:13:49,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:13:49,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:13:49,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:13:49,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:13:49,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 219 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:13:49,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:13:49,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:13:49,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:13:50,229 INFO L124 PetriNetUnfolderBase]: 896/1390 cut-off events. [2024-06-20 17:13:50,229 INFO L125 PetriNetUnfolderBase]: For 2356/2356 co-relation queries the response was YES. [2024-06-20 17:13:50,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4509 conditions, 1390 events. 896/1390 cut-off events. For 2356/2356 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 6371 event pairs, 352 based on Foata normal form. 4/1391 useless extension candidates. Maximal degree in co-relation 4489. Up to 1315 conditions per place. [2024-06-20 17:13:50,237 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 60 selfloop transitions, 13 changer transitions 0/78 dead transitions. [2024-06-20 17:13:50,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 78 transitions, 476 flow [2024-06-20 17:13:50,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:13:50,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:13:50,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-20 17:13:50,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4181184668989547 [2024-06-20 17:13:50,242 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 219 flow. Second operand 7 states and 120 transitions. [2024-06-20 17:13:50,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 78 transitions, 476 flow [2024-06-20 17:13:50,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 78 transitions, 434 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-20 17:13:50,251 INFO L231 Difference]: Finished difference. Result has 57 places, 53 transitions, 281 flow [2024-06-20 17:13:50,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=281, PETRI_PLACES=57, PETRI_TRANSITIONS=53} [2024-06-20 17:13:50,254 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 15 predicate places. [2024-06-20 17:13:50,254 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 53 transitions, 281 flow [2024-06-20 17:13:50,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:13:50,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:13:50,255 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:13:50,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-20 17:13:50,255 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:13:50,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:13:50,255 INFO L85 PathProgramCache]: Analyzing trace with hash 507214060, now seen corresponding path program 1 times [2024-06-20 17:13:50,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:13:50,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001622910] [2024-06-20 17:13:50,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:13:50,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:13:50,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:13:52,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:13:52,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:13:52,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001622910] [2024-06-20 17:13:52,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001622910] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:13:52,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:13:52,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:13:52,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945124485] [2024-06-20 17:13:52,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:13:52,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:13:52,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:13:52,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:13:52,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:13:52,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:13:52,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 53 transitions, 281 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:13:52,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:13:52,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:13:52,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:13:53,006 INFO L124 PetriNetUnfolderBase]: 1124/1722 cut-off events. [2024-06-20 17:13:53,007 INFO L125 PetriNetUnfolderBase]: For 3692/3692 co-relation queries the response was YES. [2024-06-20 17:13:53,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5732 conditions, 1722 events. 1124/1722 cut-off events. For 3692/3692 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 7709 event pairs, 402 based on Foata normal form. 2/1719 useless extension candidates. Maximal degree in co-relation 5709. Up to 1606 conditions per place. [2024-06-20 17:13:53,017 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 53 selfloop transitions, 15 changer transitions 0/72 dead transitions. [2024-06-20 17:13:53,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 72 transitions, 479 flow [2024-06-20 17:13:53,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 17:13:53,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 17:13:53,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 88 transitions. [2024-06-20 17:13:53,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4292682926829268 [2024-06-20 17:13:53,018 INFO L175 Difference]: Start difference. First operand has 57 places, 53 transitions, 281 flow. Second operand 5 states and 88 transitions. [2024-06-20 17:13:53,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 72 transitions, 479 flow [2024-06-20 17:13:53,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 72 transitions, 457 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-06-20 17:13:53,024 INFO L231 Difference]: Finished difference. Result has 60 places, 56 transitions, 333 flow [2024-06-20 17:13:53,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=333, PETRI_PLACES=60, PETRI_TRANSITIONS=56} [2024-06-20 17:13:53,027 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 18 predicate places. [2024-06-20 17:13:53,028 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 56 transitions, 333 flow [2024-06-20 17:13:53,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:13:53,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:13:53,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:13:53,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-20 17:13:53,028 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:13:53,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:13:53,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1434453265, now seen corresponding path program 1 times [2024-06-20 17:13:53,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:13:53,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679088565] [2024-06-20 17:13:53,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:13:53,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:13:53,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:13:55,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:13:55,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:13:55,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679088565] [2024-06-20 17:13:55,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679088565] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:13:55,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:13:55,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:13:55,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322289215] [2024-06-20 17:13:55,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:13:55,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:13:55,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:13:55,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:13:55,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:13:55,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:13:55,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 56 transitions, 333 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:13:55,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:13:55,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:13:55,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:13:56,136 INFO L124 PetriNetUnfolderBase]: 1137/1747 cut-off events. [2024-06-20 17:13:56,136 INFO L125 PetriNetUnfolderBase]: For 5117/5117 co-relation queries the response was YES. [2024-06-20 17:13:56,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6246 conditions, 1747 events. 1137/1747 cut-off events. For 5117/5117 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 7848 event pairs, 384 based on Foata normal form. 2/1744 useless extension candidates. Maximal degree in co-relation 6221. Up to 1597 conditions per place. [2024-06-20 17:13:56,145 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 58 selfloop transitions, 19 changer transitions 0/81 dead transitions. [2024-06-20 17:13:56,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 81 transitions, 567 flow [2024-06-20 17:13:56,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:13:56,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:13:56,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-20 17:13:56,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-20 17:13:56,146 INFO L175 Difference]: Start difference. First operand has 60 places, 56 transitions, 333 flow. Second operand 6 states and 105 transitions. [2024-06-20 17:13:56,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 81 transitions, 567 flow [2024-06-20 17:13:56,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 81 transitions, 521 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-20 17:13:56,151 INFO L231 Difference]: Finished difference. Result has 63 places, 59 transitions, 371 flow [2024-06-20 17:13:56,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=291, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=371, PETRI_PLACES=63, PETRI_TRANSITIONS=59} [2024-06-20 17:13:56,152 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 21 predicate places. [2024-06-20 17:13:56,152 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 59 transitions, 371 flow [2024-06-20 17:13:56,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:13:56,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:13:56,152 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:13:56,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-20 17:13:56,153 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:13:56,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:13:56,153 INFO L85 PathProgramCache]: Analyzing trace with hash -586711659, now seen corresponding path program 2 times [2024-06-20 17:13:56,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:13:56,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297274811] [2024-06-20 17:13:56,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:13:56,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:13:56,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:13:58,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:13:58,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:13:58,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297274811] [2024-06-20 17:13:58,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297274811] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:13:58,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:13:58,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:13:58,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001055954] [2024-06-20 17:13:58,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:13:58,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:13:58,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:13:58,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:13:58,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:13:58,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:13:58,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 59 transitions, 371 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:13:58,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:13:58,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:13:58,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:13:59,532 INFO L124 PetriNetUnfolderBase]: 1132/1744 cut-off events. [2024-06-20 17:13:59,532 INFO L125 PetriNetUnfolderBase]: For 5112/5117 co-relation queries the response was YES. [2024-06-20 17:13:59,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6269 conditions, 1744 events. 1132/1744 cut-off events. For 5112/5117 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 7889 event pairs, 375 based on Foata normal form. 6/1747 useless extension candidates. Maximal degree in co-relation 6243. Up to 1598 conditions per place. [2024-06-20 17:13:59,543 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 66 selfloop transitions, 19 changer transitions 0/89 dead transitions. [2024-06-20 17:13:59,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 89 transitions, 635 flow [2024-06-20 17:13:59,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:13:59,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:13:59,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-20 17:13:59,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-20 17:13:59,546 INFO L175 Difference]: Start difference. First operand has 63 places, 59 transitions, 371 flow. Second operand 7 states and 119 transitions. [2024-06-20 17:13:59,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 89 transitions, 635 flow [2024-06-20 17:13:59,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 89 transitions, 591 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-20 17:13:59,552 INFO L231 Difference]: Finished difference. Result has 66 places, 62 transitions, 409 flow [2024-06-20 17:13:59,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=327, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=409, PETRI_PLACES=66, PETRI_TRANSITIONS=62} [2024-06-20 17:13:59,552 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 24 predicate places. [2024-06-20 17:13:59,552 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 62 transitions, 409 flow [2024-06-20 17:13:59,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:13:59,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:13:59,552 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:13:59,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-20 17:13:59,553 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:13:59,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:13:59,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1885989037, now seen corresponding path program 1 times [2024-06-20 17:13:59,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:13:59,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879480803] [2024-06-20 17:13:59,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:13:59,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:13:59,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:14:01,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:14:01,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:14:01,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879480803] [2024-06-20 17:14:01,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879480803] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:14:01,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:14:01,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 17:14:01,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62014122] [2024-06-20 17:14:01,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:14:01,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:14:01,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:14:01,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:14:01,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:14:01,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:14:01,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 62 transitions, 409 flow. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:14:01,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:14:01,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:14:01,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:14:01,840 INFO L124 PetriNetUnfolderBase]: 893/1386 cut-off events. [2024-06-20 17:14:01,841 INFO L125 PetriNetUnfolderBase]: For 5552/5552 co-relation queries the response was YES. [2024-06-20 17:14:01,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5484 conditions, 1386 events. 893/1386 cut-off events. For 5552/5552 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 6356 event pairs, 338 based on Foata normal form. 2/1383 useless extension candidates. Maximal degree in co-relation 5457. Up to 1329 conditions per place. [2024-06-20 17:14:01,847 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 61 selfloop transitions, 10 changer transitions 0/76 dead transitions. [2024-06-20 17:14:01,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 76 transitions, 603 flow [2024-06-20 17:14:01,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 17:14:01,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 17:14:01,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 85 transitions. [2024-06-20 17:14:01,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-20 17:14:01,849 INFO L175 Difference]: Start difference. First operand has 66 places, 62 transitions, 409 flow. Second operand 5 states and 85 transitions. [2024-06-20 17:14:01,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 76 transitions, 603 flow [2024-06-20 17:14:01,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 76 transitions, 545 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-20 17:14:01,853 INFO L231 Difference]: Finished difference. Result has 66 places, 65 transitions, 404 flow [2024-06-20 17:14:01,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=351, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=404, PETRI_PLACES=66, PETRI_TRANSITIONS=65} [2024-06-20 17:14:01,854 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 24 predicate places. [2024-06-20 17:14:01,854 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 65 transitions, 404 flow [2024-06-20 17:14:01,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:14:01,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:14:01,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:14:01,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-20 17:14:01,854 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:14:01,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:14:01,855 INFO L85 PathProgramCache]: Analyzing trace with hash -651370075, now seen corresponding path program 1 times [2024-06-20 17:14:01,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:14:01,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183109246] [2024-06-20 17:14:01,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:14:01,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:14:01,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:14:03,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:14:03,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:14:03,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183109246] [2024-06-20 17:14:03,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183109246] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:14:03,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:14:03,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:14:03,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978925311] [2024-06-20 17:14:03,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:14:03,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:14:03,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:14:03,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:14:03,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:14:03,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:14:03,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 65 transitions, 404 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:14:03,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:14:03,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:14:03,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:14:04,494 INFO L124 PetriNetUnfolderBase]: 1143/1760 cut-off events. [2024-06-20 17:14:04,495 INFO L125 PetriNetUnfolderBase]: For 7773/7773 co-relation queries the response was YES. [2024-06-20 17:14:04,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6951 conditions, 1760 events. 1143/1760 cut-off events. For 7773/7773 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 7941 event pairs, 240 based on Foata normal form. 4/1759 useless extension candidates. Maximal degree in co-relation 6923. Up to 1622 conditions per place. [2024-06-20 17:14:04,504 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 74 selfloop transitions, 11 changer transitions 0/89 dead transitions. [2024-06-20 17:14:04,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 89 transitions, 646 flow [2024-06-20 17:14:04,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:14:04,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:14:04,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-20 17:14:04,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4105691056910569 [2024-06-20 17:14:04,507 INFO L175 Difference]: Start difference. First operand has 66 places, 65 transitions, 404 flow. Second operand 6 states and 101 transitions. [2024-06-20 17:14:04,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 89 transitions, 646 flow [2024-06-20 17:14:04,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 89 transitions, 619 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-20 17:14:04,514 INFO L231 Difference]: Finished difference. Result has 69 places, 67 transitions, 430 flow [2024-06-20 17:14:04,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=377, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=430, PETRI_PLACES=69, PETRI_TRANSITIONS=67} [2024-06-20 17:14:04,515 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 27 predicate places. [2024-06-20 17:14:04,515 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 67 transitions, 430 flow [2024-06-20 17:14:04,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:14:04,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:14:04,516 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:14:04,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-20 17:14:04,516 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:14:04,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:14:04,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1518375107, now seen corresponding path program 2 times [2024-06-20 17:14:04,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:14:04,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403017928] [2024-06-20 17:14:04,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:14:04,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:14:04,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:14:06,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:14:06,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:14:06,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403017928] [2024-06-20 17:14:06,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403017928] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:14:06,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:14:06,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:14:06,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298974615] [2024-06-20 17:14:06,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:14:06,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:14:06,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:14:06,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:14:06,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:14:06,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:14:06,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 67 transitions, 430 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:14:06,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:14:06,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:14:06,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:14:07,527 INFO L124 PetriNetUnfolderBase]: 1135/1748 cut-off events. [2024-06-20 17:14:07,527 INFO L125 PetriNetUnfolderBase]: For 9011/9011 co-relation queries the response was YES. [2024-06-20 17:14:07,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7153 conditions, 1748 events. 1135/1748 cut-off events. For 9011/9011 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 7867 event pairs, 343 based on Foata normal form. 4/1747 useless extension candidates. Maximal degree in co-relation 7124. Up to 1598 conditions per place. [2024-06-20 17:14:07,553 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 70 selfloop transitions, 17 changer transitions 0/91 dead transitions. [2024-06-20 17:14:07,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 91 transitions, 680 flow [2024-06-20 17:14:07,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:14:07,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:14:07,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 103 transitions. [2024-06-20 17:14:07,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186991869918699 [2024-06-20 17:14:07,560 INFO L175 Difference]: Start difference. First operand has 69 places, 67 transitions, 430 flow. Second operand 6 states and 103 transitions. [2024-06-20 17:14:07,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 91 transitions, 680 flow [2024-06-20 17:14:07,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 91 transitions, 645 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-20 17:14:07,570 INFO L231 Difference]: Finished difference. Result has 71 places, 69 transitions, 465 flow [2024-06-20 17:14:07,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=395, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=465, PETRI_PLACES=71, PETRI_TRANSITIONS=69} [2024-06-20 17:14:07,571 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 29 predicate places. [2024-06-20 17:14:07,571 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 69 transitions, 465 flow [2024-06-20 17:14:07,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:14:07,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:14:07,571 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:14:07,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-20 17:14:07,572 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:14:07,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:14:07,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1518380067, now seen corresponding path program 1 times [2024-06-20 17:14:07,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:14:07,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118560875] [2024-06-20 17:14:07,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:14:07,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:14:07,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:14:10,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:14:10,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:14:10,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118560875] [2024-06-20 17:14:10,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118560875] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:14:10,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:14:10,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:14:10,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710089879] [2024-06-20 17:14:10,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:14:10,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:14:10,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:14:10,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:14:10,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:14:10,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:14:10,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 69 transitions, 465 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:14:10,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:14:10,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:14:10,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:14:11,000 INFO L124 PetriNetUnfolderBase]: 1203/1876 cut-off events. [2024-06-20 17:14:11,000 INFO L125 PetriNetUnfolderBase]: For 11812/11812 co-relation queries the response was YES. [2024-06-20 17:14:11,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7919 conditions, 1876 events. 1203/1876 cut-off events. For 11812/11812 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 8698 event pairs, 306 based on Foata normal form. 16/1887 useless extension candidates. Maximal degree in co-relation 7889. Up to 1546 conditions per place. [2024-06-20 17:14:11,009 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 76 selfloop transitions, 22 changer transitions 0/102 dead transitions. [2024-06-20 17:14:11,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 102 transitions, 773 flow [2024-06-20 17:14:11,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:14:11,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:14:11,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-20 17:14:11,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43205574912891986 [2024-06-20 17:14:11,014 INFO L175 Difference]: Start difference. First operand has 71 places, 69 transitions, 465 flow. Second operand 7 states and 124 transitions. [2024-06-20 17:14:11,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 102 transitions, 773 flow [2024-06-20 17:14:11,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 102 transitions, 723 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-20 17:14:11,023 INFO L231 Difference]: Finished difference. Result has 74 places, 70 transitions, 491 flow [2024-06-20 17:14:11,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=415, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=491, PETRI_PLACES=74, PETRI_TRANSITIONS=70} [2024-06-20 17:14:11,024 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 32 predicate places. [2024-06-20 17:14:11,024 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 70 transitions, 491 flow [2024-06-20 17:14:11,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:14:11,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:14:11,025 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:14:11,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-20 17:14:11,025 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:14:11,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:14:11,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1008183923, now seen corresponding path program 2 times [2024-06-20 17:14:11,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:14:11,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803222321] [2024-06-20 17:14:11,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:14:11,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:14:11,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:14:13,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:14:13,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:14:13,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803222321] [2024-06-20 17:14:13,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803222321] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:14:13,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:14:13,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:14:13,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577676263] [2024-06-20 17:14:13,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:14:13,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:14:13,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:14:13,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:14:13,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:14:13,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:14:13,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 70 transitions, 491 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:14:13,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:14:13,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:14:13,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:14:14,351 INFO L124 PetriNetUnfolderBase]: 1319/2076 cut-off events. [2024-06-20 17:14:14,351 INFO L125 PetriNetUnfolderBase]: For 15052/15052 co-relation queries the response was YES. [2024-06-20 17:14:14,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9092 conditions, 2076 events. 1319/2076 cut-off events. For 15052/15052 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 10078 event pairs, 334 based on Foata normal form. 12/2083 useless extension candidates. Maximal degree in co-relation 9061. Up to 1469 conditions per place. [2024-06-20 17:14:14,364 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 79 selfloop transitions, 31 changer transitions 0/114 dead transitions. [2024-06-20 17:14:14,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 114 transitions, 923 flow [2024-06-20 17:14:14,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:14:14,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:14:14,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-20 17:14:14,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329268292682927 [2024-06-20 17:14:14,385 INFO L175 Difference]: Start difference. First operand has 74 places, 70 transitions, 491 flow. Second operand 8 states and 142 transitions. [2024-06-20 17:14:14,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 114 transitions, 923 flow [2024-06-20 17:14:14,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 114 transitions, 865 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-20 17:14:14,399 INFO L231 Difference]: Finished difference. Result has 77 places, 72 transitions, 551 flow [2024-06-20 17:14:14,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=441, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=551, PETRI_PLACES=77, PETRI_TRANSITIONS=72} [2024-06-20 17:14:14,399 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 35 predicate places. [2024-06-20 17:14:14,399 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 72 transitions, 551 flow [2024-06-20 17:14:14,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:14:14,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:14:14,400 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:14:14,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-20 17:14:14,400 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:14:14,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:14:14,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1008190433, now seen corresponding path program 3 times [2024-06-20 17:14:14,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:14:14,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102015748] [2024-06-20 17:14:14,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:14:14,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:14:14,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:14:16,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:14:16,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:14:16,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102015748] [2024-06-20 17:14:16,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102015748] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:14:16,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:14:16,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:14:16,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264078557] [2024-06-20 17:14:16,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:14:16,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:14:16,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:14:16,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:14:16,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:14:16,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:14:16,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 72 transitions, 551 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:14:16,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:14:16,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:14:16,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:14:17,771 INFO L124 PetriNetUnfolderBase]: 1387/2192 cut-off events. [2024-06-20 17:14:17,771 INFO L125 PetriNetUnfolderBase]: For 16119/16119 co-relation queries the response was YES. [2024-06-20 17:14:17,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9627 conditions, 2192 events. 1387/2192 cut-off events. For 16119/16119 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 10867 event pairs, 409 based on Foata normal form. 16/2203 useless extension candidates. Maximal degree in co-relation 9595. Up to 1885 conditions per place. [2024-06-20 17:14:17,782 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 77 selfloop transitions, 28 changer transitions 0/109 dead transitions. [2024-06-20 17:14:17,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 109 transitions, 885 flow [2024-06-20 17:14:17,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:14:17,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:14:17,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-20 17:14:17,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4176829268292683 [2024-06-20 17:14:17,785 INFO L175 Difference]: Start difference. First operand has 77 places, 72 transitions, 551 flow. Second operand 8 states and 137 transitions. [2024-06-20 17:14:17,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 109 transitions, 885 flow [2024-06-20 17:14:17,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 109 transitions, 845 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-20 17:14:17,826 INFO L231 Difference]: Finished difference. Result has 81 places, 73 transitions, 598 flow [2024-06-20 17:14:17,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=511, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=598, PETRI_PLACES=81, PETRI_TRANSITIONS=73} [2024-06-20 17:14:17,827 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 39 predicate places. [2024-06-20 17:14:17,827 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 73 transitions, 598 flow [2024-06-20 17:14:17,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:14:17,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:14:17,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:14:17,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-20 17:14:17,828 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:14:17,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:14:17,829 INFO L85 PathProgramCache]: Analyzing trace with hash -1008363413, now seen corresponding path program 4 times [2024-06-20 17:14:17,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:14:17,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299470307] [2024-06-20 17:14:17,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:14:17,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:14:17,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:14:20,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:14:20,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:14:20,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299470307] [2024-06-20 17:14:20,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299470307] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:14:20,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:14:20,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:14:20,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526262915] [2024-06-20 17:14:20,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:14:20,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:14:20,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:14:20,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:14:20,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:14:20,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:14:20,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 73 transitions, 598 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:14:20,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:14:20,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:14:20,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:14:21,317 INFO L124 PetriNetUnfolderBase]: 1359/2152 cut-off events. [2024-06-20 17:14:21,318 INFO L125 PetriNetUnfolderBase]: For 17041/17046 co-relation queries the response was YES. [2024-06-20 17:14:21,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9495 conditions, 2152 events. 1359/2152 cut-off events. For 17041/17046 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 10649 event pairs, 384 based on Foata normal form. 20/2169 useless extension candidates. Maximal degree in co-relation 9461. Up to 1921 conditions per place. [2024-06-20 17:14:21,328 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 89 selfloop transitions, 15 changer transitions 0/108 dead transitions. [2024-06-20 17:14:21,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 108 transitions, 906 flow [2024-06-20 17:14:21,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:14:21,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:14:21,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-20 17:14:21,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4054878048780488 [2024-06-20 17:14:21,330 INFO L175 Difference]: Start difference. First operand has 81 places, 73 transitions, 598 flow. Second operand 8 states and 133 transitions. [2024-06-20 17:14:21,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 108 transitions, 906 flow [2024-06-20 17:14:21,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 108 transitions, 839 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-20 17:14:21,349 INFO L231 Difference]: Finished difference. Result has 83 places, 73 transitions, 568 flow [2024-06-20 17:14:21,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=531, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=568, PETRI_PLACES=83, PETRI_TRANSITIONS=73} [2024-06-20 17:14:21,350 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 41 predicate places. [2024-06-20 17:14:21,350 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 73 transitions, 568 flow [2024-06-20 17:14:21,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:14:21,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:14:21,351 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:14:21,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-20 17:14:21,351 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:14:21,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:14:21,351 INFO L85 PathProgramCache]: Analyzing trace with hash -1653154791, now seen corresponding path program 1 times [2024-06-20 17:14:21,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:14:21,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114887034] [2024-06-20 17:14:21,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:14:21,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:14:21,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:14:23,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:14:23,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:14:23,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114887034] [2024-06-20 17:14:23,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114887034] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:14:23,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:14:23,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:14:23,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325364] [2024-06-20 17:14:23,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:14:23,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:14:23,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:14:23,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:14:23,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:14:23,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:14:23,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 73 transitions, 568 flow. Second operand has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:14:23,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:14:23,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:14:23,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:14:23,968 INFO L124 PetriNetUnfolderBase]: 1353/2142 cut-off events. [2024-06-20 17:14:23,968 INFO L125 PetriNetUnfolderBase]: For 16669/16669 co-relation queries the response was YES. [2024-06-20 17:14:23,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9430 conditions, 2142 events. 1353/2142 cut-off events. For 16669/16669 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 10565 event pairs, 373 based on Foata normal form. 2/2142 useless extension candidates. Maximal degree in co-relation 9395. Up to 2085 conditions per place. [2024-06-20 17:14:23,977 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 79 selfloop transitions, 11 changer transitions 0/94 dead transitions. [2024-06-20 17:14:23,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 94 transitions, 826 flow [2024-06-20 17:14:23,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:14:23,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:14:23,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 91 transitions. [2024-06-20 17:14:23,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3699186991869919 [2024-06-20 17:14:23,979 INFO L175 Difference]: Start difference. First operand has 83 places, 73 transitions, 568 flow. Second operand 6 states and 91 transitions. [2024-06-20 17:14:23,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 94 transitions, 826 flow [2024-06-20 17:14:23,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 94 transitions, 755 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-20 17:14:23,991 INFO L231 Difference]: Finished difference. Result has 82 places, 82 transitions, 597 flow [2024-06-20 17:14:23,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=503, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=597, PETRI_PLACES=82, PETRI_TRANSITIONS=82} [2024-06-20 17:14:23,991 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 40 predicate places. [2024-06-20 17:14:23,991 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 82 transitions, 597 flow [2024-06-20 17:14:23,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:14:23,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:14:23,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:14:23,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-20 17:14:23,992 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:14:23,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:14:23,992 INFO L85 PathProgramCache]: Analyzing trace with hash 632164106, now seen corresponding path program 1 times [2024-06-20 17:14:23,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:14:23,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739548515] [2024-06-20 17:14:23,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:14:23,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:14:24,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:14:26,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:14:26,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:14:26,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739548515] [2024-06-20 17:14:26,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739548515] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:14:26,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:14:26,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:14:26,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570657861] [2024-06-20 17:14:26,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:14:26,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:14:26,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:14:26,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:14:26,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:14:26,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:14:26,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 82 transitions, 597 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:14:26,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:14:26,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:14:26,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:14:27,314 INFO L124 PetriNetUnfolderBase]: 1401/2224 cut-off events. [2024-06-20 17:14:27,314 INFO L125 PetriNetUnfolderBase]: For 19149/19149 co-relation queries the response was YES. [2024-06-20 17:14:27,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9959 conditions, 2224 events. 1401/2224 cut-off events. For 19149/19149 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 11044 event pairs, 270 based on Foata normal form. 12/2231 useless extension candidates. Maximal degree in co-relation 9923. Up to 1990 conditions per place. [2024-06-20 17:14:27,326 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 94 selfloop transitions, 14 changer transitions 0/112 dead transitions. [2024-06-20 17:14:27,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 112 transitions, 909 flow [2024-06-20 17:14:27,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:14:27,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:14:27,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-20 17:14:27,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4076655052264808 [2024-06-20 17:14:27,328 INFO L175 Difference]: Start difference. First operand has 82 places, 82 transitions, 597 flow. Second operand 7 states and 117 transitions. [2024-06-20 17:14:27,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 112 transitions, 909 flow [2024-06-20 17:14:27,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 112 transitions, 901 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-06-20 17:14:27,343 INFO L231 Difference]: Finished difference. Result has 88 places, 83 transitions, 647 flow [2024-06-20 17:14:27,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=589, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=647, PETRI_PLACES=88, PETRI_TRANSITIONS=83} [2024-06-20 17:14:27,344 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 46 predicate places. [2024-06-20 17:14:27,344 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 83 transitions, 647 flow [2024-06-20 17:14:27,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:14:27,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:14:27,344 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:14:27,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-20 17:14:27,345 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:14:27,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:14:27,345 INFO L85 PathProgramCache]: Analyzing trace with hash -175010158, now seen corresponding path program 2 times [2024-06-20 17:14:27,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:14:27,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855516470] [2024-06-20 17:14:27,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:14:27,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:14:27,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:14:29,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:14:29,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:14:29,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855516470] [2024-06-20 17:14:29,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855516470] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:14:29,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:14:29,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:14:29,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094268243] [2024-06-20 17:14:29,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:14:29,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:14:29,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:14:29,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:14:29,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:14:29,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:14:29,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 83 transitions, 647 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:14:29,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:14:29,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:14:29,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:14:30,869 INFO L124 PetriNetUnfolderBase]: 1469/2340 cut-off events. [2024-06-20 17:14:30,869 INFO L125 PetriNetUnfolderBase]: For 21855/21855 co-relation queries the response was YES. [2024-06-20 17:14:30,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10622 conditions, 2340 events. 1469/2340 cut-off events. For 21855/21855 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 11883 event pairs, 403 based on Foata normal form. 12/2347 useless extension candidates. Maximal degree in co-relation 10583. Up to 2111 conditions per place. [2024-06-20 17:14:30,883 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 93 selfloop transitions, 18 changer transitions 0/115 dead transitions. [2024-06-20 17:14:30,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 115 transitions, 977 flow [2024-06-20 17:14:30,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:14:30,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:14:30,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-20 17:14:30,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-20 17:14:30,886 INFO L175 Difference]: Start difference. First operand has 88 places, 83 transitions, 647 flow. Second operand 7 states and 119 transitions. [2024-06-20 17:14:30,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 115 transitions, 977 flow [2024-06-20 17:14:30,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 115 transitions, 937 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-20 17:14:30,909 INFO L231 Difference]: Finished difference. Result has 91 places, 86 transitions, 690 flow [2024-06-20 17:14:30,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=607, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=690, PETRI_PLACES=91, PETRI_TRANSITIONS=86} [2024-06-20 17:14:30,910 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 49 predicate places. [2024-06-20 17:14:30,910 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 86 transitions, 690 flow [2024-06-20 17:14:30,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:14:30,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:14:30,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:14:30,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-20 17:14:30,911 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:14:30,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:14:30,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1194646710, now seen corresponding path program 3 times [2024-06-20 17:14:30,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:14:30,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547118412] [2024-06-20 17:14:30,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:14:30,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:14:30,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:14:33,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:14:33,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:14:33,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547118412] [2024-06-20 17:14:33,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547118412] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:14:33,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:14:33,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:14:33,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869358086] [2024-06-20 17:14:33,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:14:33,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:14:33,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:14:33,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:14:33,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:14:33,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:14:33,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 86 transitions, 690 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:14:33,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:14:33,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:14:33,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:14:34,526 INFO L124 PetriNetUnfolderBase]: 1449/2312 cut-off events. [2024-06-20 17:14:34,526 INFO L125 PetriNetUnfolderBase]: For 22830/22835 co-relation queries the response was YES. [2024-06-20 17:14:34,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10442 conditions, 2312 events. 1449/2312 cut-off events. For 22830/22835 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 11728 event pairs, 380 based on Foata normal form. 16/2325 useless extension candidates. Maximal degree in co-relation 10401. Up to 2098 conditions per place. [2024-06-20 17:14:34,539 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 99 selfloop transitions, 16 changer transitions 0/119 dead transitions. [2024-06-20 17:14:34,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 119 transitions, 978 flow [2024-06-20 17:14:34,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:14:34,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:14:34,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-20 17:14:34,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39939024390243905 [2024-06-20 17:14:34,542 INFO L175 Difference]: Start difference. First operand has 91 places, 86 transitions, 690 flow. Second operand 8 states and 131 transitions. [2024-06-20 17:14:34,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 119 transitions, 978 flow [2024-06-20 17:14:34,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 119 transitions, 931 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-20 17:14:34,563 INFO L231 Difference]: Finished difference. Result has 94 places, 85 transitions, 649 flow [2024-06-20 17:14:34,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=613, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=649, PETRI_PLACES=94, PETRI_TRANSITIONS=85} [2024-06-20 17:14:34,564 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 52 predicate places. [2024-06-20 17:14:34,564 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 85 transitions, 649 flow [2024-06-20 17:14:34,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:14:34,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:14:34,564 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:14:34,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-20 17:14:34,565 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:14:34,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:14:34,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1060912178, now seen corresponding path program 1 times [2024-06-20 17:14:34,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:14:34,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489960858] [2024-06-20 17:14:34,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:14:34,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:14:34,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:14:36,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:14:36,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:14:36,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489960858] [2024-06-20 17:14:36,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489960858] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:14:36,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:14:36,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:14:36,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523101851] [2024-06-20 17:14:36,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:14:36,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:14:36,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:14:36,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:14:36,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:14:36,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:14:36,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 85 transitions, 649 flow. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:14:36,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:14:36,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:14:36,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:14:37,429 INFO L124 PetriNetUnfolderBase]: 1371/2229 cut-off events. [2024-06-20 17:14:37,430 INFO L125 PetriNetUnfolderBase]: For 23390/23390 co-relation queries the response was YES. [2024-06-20 17:14:37,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10246 conditions, 2229 events. 1371/2229 cut-off events. For 23390/23390 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 11413 event pairs, 387 based on Foata normal form. 3/2228 useless extension candidates. Maximal degree in co-relation 10204. Up to 2124 conditions per place. [2024-06-20 17:14:37,440 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 80 selfloop transitions, 16 changer transitions 0/104 dead transitions. [2024-06-20 17:14:37,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 104 transitions, 911 flow [2024-06-20 17:14:37,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:14:37,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:14:37,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 100 transitions. [2024-06-20 17:14:37,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4065040650406504 [2024-06-20 17:14:37,443 INFO L175 Difference]: Start difference. First operand has 94 places, 85 transitions, 649 flow. Second operand 6 states and 100 transitions. [2024-06-20 17:14:37,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 104 transitions, 911 flow [2024-06-20 17:14:37,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 104 transitions, 834 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-20 17:14:37,477 INFO L231 Difference]: Finished difference. Result has 92 places, 89 transitions, 654 flow [2024-06-20 17:14:37,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=572, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=654, PETRI_PLACES=92, PETRI_TRANSITIONS=89} [2024-06-20 17:14:37,478 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 50 predicate places. [2024-06-20 17:14:37,478 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 89 transitions, 654 flow [2024-06-20 17:14:37,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:14:37,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:14:37,480 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:14:37,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-20 17:14:37,481 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:14:37,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:14:37,482 INFO L85 PathProgramCache]: Analyzing trace with hash -40662996, now seen corresponding path program 2 times [2024-06-20 17:14:37,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:14:37,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022304097] [2024-06-20 17:14:37,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:14:37,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:14:37,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:14:39,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:14:39,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:14:39,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022304097] [2024-06-20 17:14:39,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022304097] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:14:39,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:14:39,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:14:39,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193244067] [2024-06-20 17:14:39,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:14:39,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:14:39,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:14:39,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:14:39,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:14:39,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:14:39,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 89 transitions, 654 flow. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:14:39,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:14:39,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:14:39,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:14:39,944 INFO L124 PetriNetUnfolderBase]: 1371/2222 cut-off events. [2024-06-20 17:14:39,944 INFO L125 PetriNetUnfolderBase]: For 25086/25086 co-relation queries the response was YES. [2024-06-20 17:14:39,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10417 conditions, 2222 events. 1371/2222 cut-off events. For 25086/25086 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 11454 event pairs, 396 based on Foata normal form. 3/2219 useless extension candidates. Maximal degree in co-relation 10376. Up to 2125 conditions per place. [2024-06-20 17:14:39,959 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 80 selfloop transitions, 17 changer transitions 0/105 dead transitions. [2024-06-20 17:14:39,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 105 transitions, 926 flow [2024-06-20 17:14:39,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:14:39,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:14:39,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 97 transitions. [2024-06-20 17:14:39,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3943089430894309 [2024-06-20 17:14:39,961 INFO L175 Difference]: Start difference. First operand has 92 places, 89 transitions, 654 flow. Second operand 6 states and 97 transitions. [2024-06-20 17:14:39,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 105 transitions, 926 flow [2024-06-20 17:14:39,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 105 transitions, 874 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-20 17:14:39,982 INFO L231 Difference]: Finished difference. Result has 94 places, 92 transitions, 681 flow [2024-06-20 17:14:39,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=602, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=681, PETRI_PLACES=94, PETRI_TRANSITIONS=92} [2024-06-20 17:14:39,982 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 52 predicate places. [2024-06-20 17:14:39,982 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 92 transitions, 681 flow [2024-06-20 17:14:39,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:14:39,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:14:39,983 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:14:39,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-20 17:14:39,983 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:14:39,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:14:39,983 INFO L85 PathProgramCache]: Analyzing trace with hash -733114536, now seen corresponding path program 1 times [2024-06-20 17:14:39,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:14:39,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211273412] [2024-06-20 17:14:39,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:14:39,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:14:40,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:14:41,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:14:41,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:14:41,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211273412] [2024-06-20 17:14:41,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211273412] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:14:41,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:14:41,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:14:41,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510994116] [2024-06-20 17:14:41,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:14:41,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:14:41,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:14:41,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:14:41,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:14:41,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:14:41,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 92 transitions, 681 flow. Second operand has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:14:41,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:14:41,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:14:41,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:14:43,147 INFO L124 PetriNetUnfolderBase]: 1555/2470 cut-off events. [2024-06-20 17:14:43,147 INFO L125 PetriNetUnfolderBase]: For 29618/29618 co-relation queries the response was YES. [2024-06-20 17:14:43,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11808 conditions, 2470 events. 1555/2470 cut-off events. For 29618/29618 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 12601 event pairs, 385 based on Foata normal form. 4/2470 useless extension candidates. Maximal degree in co-relation 11766. Up to 2287 conditions per place. [2024-06-20 17:14:43,163 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 98 selfloop transitions, 33 changer transitions 0/135 dead transitions. [2024-06-20 17:14:43,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 135 transitions, 1226 flow [2024-06-20 17:14:43,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:14:43,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:14:43,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-20 17:14:43,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39939024390243905 [2024-06-20 17:14:43,165 INFO L175 Difference]: Start difference. First operand has 94 places, 92 transitions, 681 flow. Second operand 8 states and 131 transitions. [2024-06-20 17:14:43,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 135 transitions, 1226 flow [2024-06-20 17:14:43,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 135 transitions, 1164 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-20 17:14:43,236 INFO L231 Difference]: Finished difference. Result has 100 places, 108 transitions, 878 flow [2024-06-20 17:14:43,237 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=634, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=878, PETRI_PLACES=100, PETRI_TRANSITIONS=108} [2024-06-20 17:14:43,237 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 58 predicate places. [2024-06-20 17:14:43,237 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 108 transitions, 878 flow [2024-06-20 17:14:43,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:14:43,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:14:43,238 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:14:43,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-20 17:14:43,238 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:14:43,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:14:43,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1271776832, now seen corresponding path program 2 times [2024-06-20 17:14:43,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:14:43,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315492396] [2024-06-20 17:14:43,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:14:43,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:14:43,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:14:45,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:14:45,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:14:45,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315492396] [2024-06-20 17:14:45,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315492396] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:14:45,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:14:45,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:14:45,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278528584] [2024-06-20 17:14:45,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:14:45,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:14:45,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:14:45,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:14:45,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:14:45,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:14:45,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 108 transitions, 878 flow. Second operand has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:14:45,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:14:45,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:14:45,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:14:46,317 INFO L124 PetriNetUnfolderBase]: 1543/2453 cut-off events. [2024-06-20 17:14:46,317 INFO L125 PetriNetUnfolderBase]: For 32211/32213 co-relation queries the response was YES. [2024-06-20 17:14:46,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12229 conditions, 2453 events. 1543/2453 cut-off events. For 32211/32213 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 12450 event pairs, 407 based on Foata normal form. 4/2450 useless extension candidates. Maximal degree in co-relation 12184. Up to 2279 conditions per place. [2024-06-20 17:14:46,331 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 87 selfloop transitions, 31 changer transitions 0/122 dead transitions. [2024-06-20 17:14:46,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 122 transitions, 1166 flow [2024-06-20 17:14:46,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:14:46,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:14:46,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 96 transitions. [2024-06-20 17:14:46,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-20 17:14:46,332 INFO L175 Difference]: Start difference. First operand has 100 places, 108 transitions, 878 flow. Second operand 6 states and 96 transitions. [2024-06-20 17:14:46,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 122 transitions, 1166 flow [2024-06-20 17:14:46,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 122 transitions, 1120 flow, removed 22 selfloop flow, removed 1 redundant places. [2024-06-20 17:14:46,358 INFO L231 Difference]: Finished difference. Result has 105 places, 108 transitions, 908 flow [2024-06-20 17:14:46,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=832, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=908, PETRI_PLACES=105, PETRI_TRANSITIONS=108} [2024-06-20 17:14:46,358 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 63 predicate places. [2024-06-20 17:14:46,358 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 108 transitions, 908 flow [2024-06-20 17:14:46,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:14:46,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:14:46,359 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:14:46,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-20 17:14:46,359 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:14:46,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:14:46,359 INFO L85 PathProgramCache]: Analyzing trace with hash 456210776, now seen corresponding path program 3 times [2024-06-20 17:14:46,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:14:46,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223117713] [2024-06-20 17:14:46,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:14:46,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:14:46,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:14:48,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:14:48,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:14:48,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223117713] [2024-06-20 17:14:48,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223117713] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:14:48,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:14:48,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:14:48,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785747550] [2024-06-20 17:14:48,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:14:48,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:14:48,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:14:48,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:14:48,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:14:48,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:14:48,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 108 transitions, 908 flow. Second operand has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:14:48,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:14:48,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:14:48,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:14:49,291 INFO L124 PetriNetUnfolderBase]: 1531/2437 cut-off events. [2024-06-20 17:14:49,291 INFO L125 PetriNetUnfolderBase]: For 33658/33660 co-relation queries the response was YES. [2024-06-20 17:14:49,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12234 conditions, 2437 events. 1531/2437 cut-off events. For 33658/33660 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 12410 event pairs, 405 based on Foata normal form. 4/2434 useless extension candidates. Maximal degree in co-relation 12186. Up to 2247 conditions per place. [2024-06-20 17:14:49,303 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 90 selfloop transitions, 34 changer transitions 0/128 dead transitions. [2024-06-20 17:14:49,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 128 transitions, 1260 flow [2024-06-20 17:14:49,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:14:49,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:14:49,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 109 transitions. [2024-06-20 17:14:49,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3797909407665505 [2024-06-20 17:14:49,305 INFO L175 Difference]: Start difference. First operand has 105 places, 108 transitions, 908 flow. Second operand 7 states and 109 transitions. [2024-06-20 17:14:49,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 128 transitions, 1260 flow [2024-06-20 17:14:49,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 128 transitions, 1188 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-20 17:14:49,327 INFO L231 Difference]: Finished difference. Result has 106 places, 111 transitions, 954 flow [2024-06-20 17:14:49,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=836, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=954, PETRI_PLACES=106, PETRI_TRANSITIONS=111} [2024-06-20 17:14:49,327 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 64 predicate places. [2024-06-20 17:14:49,327 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 111 transitions, 954 flow [2024-06-20 17:14:49,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:14:49,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:14:49,328 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:14:49,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-20 17:14:49,328 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:14:49,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:14:49,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1408250395, now seen corresponding path program 1 times [2024-06-20 17:14:49,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:14:49,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491659356] [2024-06-20 17:14:49,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:14:49,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:14:49,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:14:51,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:14:51,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:14:51,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491659356] [2024-06-20 17:14:51,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491659356] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:14:51,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:14:51,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:14:51,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911286256] [2024-06-20 17:14:51,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:14:51,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:14:51,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:14:51,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:14:51,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:14:51,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:14:51,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 111 transitions, 954 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:14:51,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:14:51,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:14:51,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:14:52,324 INFO L124 PetriNetUnfolderBase]: 1459/2371 cut-off events. [2024-06-20 17:14:52,325 INFO L125 PetriNetUnfolderBase]: For 34495/34509 co-relation queries the response was YES. [2024-06-20 17:14:52,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12311 conditions, 2371 events. 1459/2371 cut-off events. For 34495/34509 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 12219 event pairs, 386 based on Foata normal form. 11/2371 useless extension candidates. Maximal degree in co-relation 12263. Up to 2205 conditions per place. [2024-06-20 17:14:52,339 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 112 selfloop transitions, 28 changer transitions 0/148 dead transitions. [2024-06-20 17:14:52,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 148 transitions, 1474 flow [2024-06-20 17:14:52,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:14:52,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:14:52,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-20 17:14:52,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41114982578397213 [2024-06-20 17:14:52,341 INFO L175 Difference]: Start difference. First operand has 106 places, 111 transitions, 954 flow. Second operand 7 states and 118 transitions. [2024-06-20 17:14:52,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 148 transitions, 1474 flow [2024-06-20 17:14:52,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 148 transitions, 1374 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-20 17:14:52,369 INFO L231 Difference]: Finished difference. Result has 110 places, 125 transitions, 1086 flow [2024-06-20 17:14:52,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=862, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1086, PETRI_PLACES=110, PETRI_TRANSITIONS=125} [2024-06-20 17:14:52,370 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 68 predicate places. [2024-06-20 17:14:52,370 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 125 transitions, 1086 flow [2024-06-20 17:14:52,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:14:52,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:14:52,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:14:52,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-20 17:14:52,370 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:14:52,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:14:52,371 INFO L85 PathProgramCache]: Analyzing trace with hash -1408160030, now seen corresponding path program 1 times [2024-06-20 17:14:52,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:14:52,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919409279] [2024-06-20 17:14:52,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:14:52,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:14:52,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:14:54,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:14:54,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:14:54,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919409279] [2024-06-20 17:14:54,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919409279] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:14:54,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:14:54,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:14:54,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858486171] [2024-06-20 17:14:54,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:14:54,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:14:54,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:14:54,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:14:54,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:14:54,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:14:54,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 125 transitions, 1086 flow. Second operand has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:14:54,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:14:54,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:14:54,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:14:55,337 INFO L124 PetriNetUnfolderBase]: 1567/2488 cut-off events. [2024-06-20 17:14:55,337 INFO L125 PetriNetUnfolderBase]: For 37460/37462 co-relation queries the response was YES. [2024-06-20 17:14:55,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13152 conditions, 2488 events. 1567/2488 cut-off events. For 37460/37462 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 12670 event pairs, 398 based on Foata normal form. 2/2488 useless extension candidates. Maximal degree in co-relation 13101. Up to 2412 conditions per place. [2024-06-20 17:14:55,353 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 133 selfloop transitions, 14 changer transitions 0/151 dead transitions. [2024-06-20 17:14:55,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 151 transitions, 1491 flow [2024-06-20 17:14:55,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:14:55,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:14:55,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 105 transitions. [2024-06-20 17:14:55,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36585365853658536 [2024-06-20 17:14:55,355 INFO L175 Difference]: Start difference. First operand has 110 places, 125 transitions, 1086 flow. Second operand 7 states and 105 transitions. [2024-06-20 17:14:55,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 151 transitions, 1491 flow [2024-06-20 17:14:55,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 151 transitions, 1449 flow, removed 20 selfloop flow, removed 1 redundant places. [2024-06-20 17:14:55,389 INFO L231 Difference]: Finished difference. Result has 118 places, 134 transitions, 1165 flow [2024-06-20 17:14:55,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1044, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1165, PETRI_PLACES=118, PETRI_TRANSITIONS=134} [2024-06-20 17:14:55,390 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 76 predicate places. [2024-06-20 17:14:55,390 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 134 transitions, 1165 flow [2024-06-20 17:14:55,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:14:55,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:14:55,390 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:14:55,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-20 17:14:55,391 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:14:55,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:14:55,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1471463141, now seen corresponding path program 2 times [2024-06-20 17:14:55,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:14:55,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178924924] [2024-06-20 17:14:55,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:14:55,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:14:55,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:14:58,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:14:58,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:14:58,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178924924] [2024-06-20 17:14:58,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178924924] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:14:58,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:14:58,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:14:58,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937797021] [2024-06-20 17:14:58,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:14:58,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:14:58,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:14:58,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:14:58,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:14:58,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:14:58,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 134 transitions, 1165 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:14:58,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:14:58,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:14:58,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:14:59,149 INFO L124 PetriNetUnfolderBase]: 1480/2396 cut-off events. [2024-06-20 17:14:59,149 INFO L125 PetriNetUnfolderBase]: For 40019/40033 co-relation queries the response was YES. [2024-06-20 17:14:59,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13076 conditions, 2396 events. 1480/2396 cut-off events. For 40019/40033 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 12314 event pairs, 382 based on Foata normal form. 12/2397 useless extension candidates. Maximal degree in co-relation 13020. Up to 2239 conditions per place. [2024-06-20 17:14:59,166 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 119 selfloop transitions, 26 changer transitions 0/156 dead transitions. [2024-06-20 17:14:59,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 156 transitions, 1565 flow [2024-06-20 17:14:59,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:14:59,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:14:59,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-20 17:14:59,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39372822299651566 [2024-06-20 17:14:59,168 INFO L175 Difference]: Start difference. First operand has 118 places, 134 transitions, 1165 flow. Second operand 7 states and 113 transitions. [2024-06-20 17:14:59,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 156 transitions, 1565 flow [2024-06-20 17:14:59,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 156 transitions, 1525 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-20 17:14:59,206 INFO L231 Difference]: Finished difference. Result has 123 places, 138 transitions, 1247 flow [2024-06-20 17:14:59,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1125, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1247, PETRI_PLACES=123, PETRI_TRANSITIONS=138} [2024-06-20 17:14:59,206 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 81 predicate places. [2024-06-20 17:14:59,206 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 138 transitions, 1247 flow [2024-06-20 17:14:59,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:14:59,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:14:59,207 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:14:59,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-20 17:14:59,207 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:14:59,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:14:59,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1260550430, now seen corresponding path program 2 times [2024-06-20 17:14:59,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:14:59,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728808834] [2024-06-20 17:14:59,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:14:59,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:14:59,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:15:01,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:15:01,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:15:01,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728808834] [2024-06-20 17:15:01,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728808834] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:15:01,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:15:01,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:15:01,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323438700] [2024-06-20 17:15:01,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:15:01,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:15:01,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:15:01,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:15:01,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:15:01,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:15:01,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 138 transitions, 1247 flow. Second operand has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:15:01,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:15:01,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:15:01,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:15:02,035 INFO L124 PetriNetUnfolderBase]: 1576/2501 cut-off events. [2024-06-20 17:15:02,035 INFO L125 PetriNetUnfolderBase]: For 44240/44242 co-relation queries the response was YES. [2024-06-20 17:15:02,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14129 conditions, 2501 events. 1576/2501 cut-off events. For 44240/44242 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 12718 event pairs, 393 based on Foata normal form. 2/2501 useless extension candidates. Maximal degree in co-relation 14071. Up to 2416 conditions per place. [2024-06-20 17:15:02,054 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 140 selfloop transitions, 18 changer transitions 0/162 dead transitions. [2024-06-20 17:15:02,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 162 transitions, 1725 flow [2024-06-20 17:15:02,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:15:02,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:15:02,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 106 transitions. [2024-06-20 17:15:02,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3693379790940767 [2024-06-20 17:15:02,057 INFO L175 Difference]: Start difference. First operand has 123 places, 138 transitions, 1247 flow. Second operand 7 states and 106 transitions. [2024-06-20 17:15:02,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 162 transitions, 1725 flow [2024-06-20 17:15:02,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 162 transitions, 1633 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-20 17:15:02,097 INFO L231 Difference]: Finished difference. Result has 126 places, 146 transitions, 1288 flow [2024-06-20 17:15:02,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1155, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1288, PETRI_PLACES=126, PETRI_TRANSITIONS=146} [2024-06-20 17:15:02,102 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 84 predicate places. [2024-06-20 17:15:02,102 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 146 transitions, 1288 flow [2024-06-20 17:15:02,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:15:02,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:15:02,102 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:15:02,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-20 17:15:02,103 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:15:02,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:15:02,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1260550585, now seen corresponding path program 3 times [2024-06-20 17:15:02,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:15:02,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131662435] [2024-06-20 17:15:02,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:15:02,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:15:02,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:15:04,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:15:04,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:15:04,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131662435] [2024-06-20 17:15:04,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131662435] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:15:04,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:15:04,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:15:04,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883145528] [2024-06-20 17:15:04,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:15:04,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:15:04,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:15:04,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:15:04,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:15:04,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:15:04,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 146 transitions, 1288 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:15:04,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:15:04,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:15:04,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:15:05,120 INFO L124 PetriNetUnfolderBase]: 1501/2410 cut-off events. [2024-06-20 17:15:05,120 INFO L125 PetriNetUnfolderBase]: For 46980/46989 co-relation queries the response was YES. [2024-06-20 17:15:05,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13869 conditions, 2410 events. 1501/2410 cut-off events. For 46980/46989 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 12312 event pairs, 399 based on Foata normal form. 8/2403 useless extension candidates. Maximal degree in co-relation 13809. Up to 2229 conditions per place. [2024-06-20 17:15:05,138 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 109 selfloop transitions, 39 changer transitions 0/161 dead transitions. [2024-06-20 17:15:05,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 161 transitions, 1664 flow [2024-06-20 17:15:05,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:15:05,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:15:05,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-20 17:15:05,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3832752613240418 [2024-06-20 17:15:05,140 INFO L175 Difference]: Start difference. First operand has 126 places, 146 transitions, 1288 flow. Second operand 7 states and 110 transitions. [2024-06-20 17:15:05,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 161 transitions, 1664 flow [2024-06-20 17:15:05,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 161 transitions, 1602 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-20 17:15:05,188 INFO L231 Difference]: Finished difference. Result has 129 places, 149 transitions, 1369 flow [2024-06-20 17:15:05,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1226, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1369, PETRI_PLACES=129, PETRI_TRANSITIONS=149} [2024-06-20 17:15:05,189 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 87 predicate places. [2024-06-20 17:15:05,189 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 149 transitions, 1369 flow [2024-06-20 17:15:05,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:15:05,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:15:05,190 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:15:05,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-20 17:15:05,190 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:15:05,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:15:05,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1260343040, now seen corresponding path program 3 times [2024-06-20 17:15:05,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:15:05,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617655233] [2024-06-20 17:15:05,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:15:05,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:15:05,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:15:07,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:15:07,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:15:07,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617655233] [2024-06-20 17:15:07,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617655233] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:15:07,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:15:07,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:15:07,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521631477] [2024-06-20 17:15:07,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:15:07,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:15:07,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:15:07,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:15:07,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:15:07,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:15:07,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 149 transitions, 1369 flow. Second operand has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:15:07,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:15:07,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:15:07,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:15:08,239 INFO L124 PetriNetUnfolderBase]: 1577/2503 cut-off events. [2024-06-20 17:15:08,239 INFO L125 PetriNetUnfolderBase]: For 50729/50731 co-relation queries the response was YES. [2024-06-20 17:15:08,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14702 conditions, 2503 events. 1577/2503 cut-off events. For 50729/50731 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 12751 event pairs, 395 based on Foata normal form. 2/2503 useless extension candidates. Maximal degree in co-relation 14641. Up to 2435 conditions per place. [2024-06-20 17:15:08,256 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 150 selfloop transitions, 14 changer transitions 0/168 dead transitions. [2024-06-20 17:15:08,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 168 transitions, 1785 flow [2024-06-20 17:15:08,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:15:08,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:15:08,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 101 transitions. [2024-06-20 17:15:08,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3519163763066202 [2024-06-20 17:15:08,258 INFO L175 Difference]: Start difference. First operand has 129 places, 149 transitions, 1369 flow. Second operand 7 states and 101 transitions. [2024-06-20 17:15:08,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 168 transitions, 1785 flow [2024-06-20 17:15:08,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 168 transitions, 1670 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-20 17:15:08,298 INFO L231 Difference]: Finished difference. Result has 132 places, 155 transitions, 1358 flow [2024-06-20 17:15:08,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1254, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1358, PETRI_PLACES=132, PETRI_TRANSITIONS=155} [2024-06-20 17:15:08,298 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 90 predicate places. [2024-06-20 17:15:08,299 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 155 transitions, 1358 flow [2024-06-20 17:15:08,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:15:08,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:15:08,299 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:15:08,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-20 17:15:08,299 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:15:08,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:15:08,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1260335104, now seen corresponding path program 1 times [2024-06-20 17:15:08,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:15:08,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767942128] [2024-06-20 17:15:08,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:15:08,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:15:08,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:15:11,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:15:11,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:15:11,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767942128] [2024-06-20 17:15:11,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767942128] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:15:11,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:15:11,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:15:11,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374954178] [2024-06-20 17:15:11,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:15:11,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:15:11,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:15:11,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:15:11,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:15:11,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:15:11,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 155 transitions, 1358 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:15:11,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:15:11,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:15:11,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:15:12,037 INFO L124 PetriNetUnfolderBase]: 1572/2496 cut-off events. [2024-06-20 17:15:12,037 INFO L125 PetriNetUnfolderBase]: For 52532/52534 co-relation queries the response was YES. [2024-06-20 17:15:12,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14727 conditions, 2496 events. 1572/2496 cut-off events. For 52532/52534 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 12692 event pairs, 394 based on Foata normal form. 2/2496 useless extension candidates. Maximal degree in co-relation 14664. Up to 2425 conditions per place. [2024-06-20 17:15:12,055 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 151 selfloop transitions, 15 changer transitions 0/170 dead transitions. [2024-06-20 17:15:12,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 170 transitions, 1744 flow [2024-06-20 17:15:12,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:15:12,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:15:12,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 101 transitions. [2024-06-20 17:15:12,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3519163763066202 [2024-06-20 17:15:12,056 INFO L175 Difference]: Start difference. First operand has 132 places, 155 transitions, 1358 flow. Second operand 7 states and 101 transitions. [2024-06-20 17:15:12,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 170 transitions, 1744 flow [2024-06-20 17:15:12,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 170 transitions, 1706 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-20 17:15:12,109 INFO L231 Difference]: Finished difference. Result has 135 places, 157 transitions, 1379 flow [2024-06-20 17:15:12,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1320, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1379, PETRI_PLACES=135, PETRI_TRANSITIONS=157} [2024-06-20 17:15:12,110 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 93 predicate places. [2024-06-20 17:15:12,110 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 157 transitions, 1379 flow [2024-06-20 17:15:12,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:15:12,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:15:12,110 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:15:12,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-20 17:15:12,111 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:15:12,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:15:12,111 INFO L85 PathProgramCache]: Analyzing trace with hash -706147413, now seen corresponding path program 1 times [2024-06-20 17:15:12,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:15:12,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607795697] [2024-06-20 17:15:12,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:15:12,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:15:12,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:15:14,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:15:14,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:15:14,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607795697] [2024-06-20 17:15:14,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607795697] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:15:14,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:15:14,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:15:14,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580821735] [2024-06-20 17:15:14,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:15:14,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:15:14,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:15:14,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:15:14,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:15:14,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:15:14,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 157 transitions, 1379 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:15:14,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:15:14,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:15:14,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:15:15,524 INFO L124 PetriNetUnfolderBase]: 1548/2491 cut-off events. [2024-06-20 17:15:15,525 INFO L125 PetriNetUnfolderBase]: For 58534/58546 co-relation queries the response was YES. [2024-06-20 17:15:15,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14960 conditions, 2491 events. 1548/2491 cut-off events. For 58534/58546 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 12838 event pairs, 335 based on Foata normal form. 13/2497 useless extension candidates. Maximal degree in co-relation 14896. Up to 2197 conditions per place. [2024-06-20 17:15:15,543 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 138 selfloop transitions, 37 changer transitions 0/191 dead transitions. [2024-06-20 17:15:15,543 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 191 transitions, 1929 flow [2024-06-20 17:15:15,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:15:15,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:15:15,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-20 17:15:15,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4115853658536585 [2024-06-20 17:15:15,546 INFO L175 Difference]: Start difference. First operand has 135 places, 157 transitions, 1379 flow. Second operand 8 states and 135 transitions. [2024-06-20 17:15:15,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 191 transitions, 1929 flow [2024-06-20 17:15:15,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 191 transitions, 1886 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-20 17:15:15,598 INFO L231 Difference]: Finished difference. Result has 138 places, 161 transitions, 1475 flow [2024-06-20 17:15:15,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1336, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1475, PETRI_PLACES=138, PETRI_TRANSITIONS=161} [2024-06-20 17:15:15,598 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 96 predicate places. [2024-06-20 17:15:15,598 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 161 transitions, 1475 flow [2024-06-20 17:15:15,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:15:15,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:15:15,599 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:15:15,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-20 17:15:15,599 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:15:15,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:15:15,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1632076949, now seen corresponding path program 1 times [2024-06-20 17:15:15,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:15:15,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831654376] [2024-06-20 17:15:15,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:15:15,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:15:15,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:15:19,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:15:19,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:15:19,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831654376] [2024-06-20 17:15:19,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831654376] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:15:19,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:15:19,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:15:19,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798455693] [2024-06-20 17:15:19,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:15:19,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:15:19,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:15:19,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:15:19,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:15:19,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:15:19,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 161 transitions, 1475 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:15:19,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:15:19,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:15:19,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:15:20,625 INFO L124 PetriNetUnfolderBase]: 1640/2592 cut-off events. [2024-06-20 17:15:20,625 INFO L125 PetriNetUnfolderBase]: For 62695/62697 co-relation queries the response was YES. [2024-06-20 17:15:20,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15981 conditions, 2592 events. 1640/2592 cut-off events. For 62695/62697 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 13235 event pairs, 391 based on Foata normal form. 2/2592 useless extension candidates. Maximal degree in co-relation 15916. Up to 2482 conditions per place. [2024-06-20 17:15:20,643 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 168 selfloop transitions, 26 changer transitions 0/198 dead transitions. [2024-06-20 17:15:20,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 198 transitions, 2111 flow [2024-06-20 17:15:20,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:15:20,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:15:20,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-20 17:15:20,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38414634146341464 [2024-06-20 17:15:20,645 INFO L175 Difference]: Start difference. First operand has 138 places, 161 transitions, 1475 flow. Second operand 8 states and 126 transitions. [2024-06-20 17:15:20,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 198 transitions, 2111 flow [2024-06-20 17:15:20,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 198 transitions, 2034 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-20 17:15:20,704 INFO L231 Difference]: Finished difference. Result has 144 places, 173 transitions, 1611 flow [2024-06-20 17:15:20,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1401, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1611, PETRI_PLACES=144, PETRI_TRANSITIONS=173} [2024-06-20 17:15:20,704 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 102 predicate places. [2024-06-20 17:15:20,704 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 173 transitions, 1611 flow [2024-06-20 17:15:20,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:15:20,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:15:20,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:15:20,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-20 17:15:20,705 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:15:20,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:15:20,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1632077073, now seen corresponding path program 2 times [2024-06-20 17:15:20,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:15:20,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761622773] [2024-06-20 17:15:20,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:15:20,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:15:20,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:15:24,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:15:24,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:15:24,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761622773] [2024-06-20 17:15:24,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761622773] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:15:24,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:15:24,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:15:24,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619781314] [2024-06-20 17:15:24,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:15:24,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:15:24,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:15:24,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:15:24,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:15:24,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:15:24,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 173 transitions, 1611 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:15:24,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:15:24,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:15:24,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:15:25,371 INFO L124 PetriNetUnfolderBase]: 1639/2620 cut-off events. [2024-06-20 17:15:25,371 INFO L125 PetriNetUnfolderBase]: For 72976/72988 co-relation queries the response was YES. [2024-06-20 17:15:25,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16456 conditions, 2620 events. 1639/2620 cut-off events. For 72976/72988 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 13548 event pairs, 384 based on Foata normal form. 24/2637 useless extension candidates. Maximal degree in co-relation 16387. Up to 2318 conditions per place. [2024-06-20 17:15:25,390 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 141 selfloop transitions, 47 changer transitions 0/207 dead transitions. [2024-06-20 17:15:25,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 207 transitions, 2219 flow [2024-06-20 17:15:25,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:15:25,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:15:25,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-20 17:15:25,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-20 17:15:25,392 INFO L175 Difference]: Start difference. First operand has 144 places, 173 transitions, 1611 flow. Second operand 8 states and 136 transitions. [2024-06-20 17:15:25,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 207 transitions, 2219 flow [2024-06-20 17:15:25,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 207 transitions, 2171 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-20 17:15:25,451 INFO L231 Difference]: Finished difference. Result has 150 places, 180 transitions, 1818 flow [2024-06-20 17:15:25,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1563, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1818, PETRI_PLACES=150, PETRI_TRANSITIONS=180} [2024-06-20 17:15:25,452 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 108 predicate places. [2024-06-20 17:15:25,452 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 180 transitions, 1818 flow [2024-06-20 17:15:25,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:15:25,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:15:25,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:15:25,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-20 17:15:25,453 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:15:25,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:15:25,453 INFO L85 PathProgramCache]: Analyzing trace with hash -703285679, now seen corresponding path program 2 times [2024-06-20 17:15:25,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:15:25,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387329413] [2024-06-20 17:15:25,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:15:25,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:15:25,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:15:29,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:15:29,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:15:29,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387329413] [2024-06-20 17:15:29,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387329413] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:15:29,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:15:29,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:15:29,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952415369] [2024-06-20 17:15:29,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:15:29,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:15:29,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:15:29,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:15:29,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:15:29,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:15:29,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 180 transitions, 1818 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:15:29,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:15:29,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:15:29,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:15:29,800 INFO L124 PetriNetUnfolderBase]: 1707/2693 cut-off events. [2024-06-20 17:15:29,801 INFO L125 PetriNetUnfolderBase]: For 77894/77896 co-relation queries the response was YES. [2024-06-20 17:15:29,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17715 conditions, 2693 events. 1707/2693 cut-off events. For 77894/77896 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 13823 event pairs, 396 based on Foata normal form. 2/2693 useless extension candidates. Maximal degree in co-relation 17643. Up to 2611 conditions per place. [2024-06-20 17:15:29,822 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 181 selfloop transitions, 17 changer transitions 0/202 dead transitions. [2024-06-20 17:15:29,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 202 transitions, 2303 flow [2024-06-20 17:15:29,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:15:29,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:15:29,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 117 transitions. [2024-06-20 17:15:29,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3567073170731707 [2024-06-20 17:15:29,823 INFO L175 Difference]: Start difference. First operand has 150 places, 180 transitions, 1818 flow. Second operand 8 states and 117 transitions. [2024-06-20 17:15:29,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 202 transitions, 2303 flow [2024-06-20 17:15:29,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 202 transitions, 2208 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-20 17:15:29,910 INFO L231 Difference]: Finished difference. Result has 153 places, 183 transitions, 1804 flow [2024-06-20 17:15:29,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1723, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1804, PETRI_PLACES=153, PETRI_TRANSITIONS=183} [2024-06-20 17:15:29,910 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 111 predicate places. [2024-06-20 17:15:29,910 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 183 transitions, 1804 flow [2024-06-20 17:15:29,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:15:29,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:15:29,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:15:29,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-20 17:15:29,911 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:15:29,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:15:29,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1629280439, now seen corresponding path program 3 times [2024-06-20 17:15:29,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:15:29,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990862015] [2024-06-20 17:15:29,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:15:29,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:15:29,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:15:33,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:15:33,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:15:33,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990862015] [2024-06-20 17:15:33,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990862015] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:15:33,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:15:33,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:15:33,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597236367] [2024-06-20 17:15:33,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:15:33,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:15:33,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:15:33,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:15:33,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:15:33,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:15:33,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 183 transitions, 1804 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:15:33,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:15:33,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:15:33,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:15:33,847 INFO L124 PetriNetUnfolderBase]: 1701/2685 cut-off events. [2024-06-20 17:15:33,848 INFO L125 PetriNetUnfolderBase]: For 76800/76802 co-relation queries the response was YES. [2024-06-20 17:15:33,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17586 conditions, 2685 events. 1701/2685 cut-off events. For 76800/76802 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 13793 event pairs, 395 based on Foata normal form. 2/2685 useless extension candidates. Maximal degree in co-relation 17513. Up to 2594 conditions per place. [2024-06-20 17:15:33,865 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 180 selfloop transitions, 22 changer transitions 0/206 dead transitions. [2024-06-20 17:15:33,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 206 transitions, 2289 flow [2024-06-20 17:15:33,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:15:33,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:15:33,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 120 transitions. [2024-06-20 17:15:33,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36585365853658536 [2024-06-20 17:15:33,866 INFO L175 Difference]: Start difference. First operand has 153 places, 183 transitions, 1804 flow. Second operand 8 states and 120 transitions. [2024-06-20 17:15:33,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 206 transitions, 2289 flow [2024-06-20 17:15:33,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 206 transitions, 2223 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-20 17:15:33,925 INFO L231 Difference]: Finished difference. Result has 156 places, 186 transitions, 1823 flow [2024-06-20 17:15:33,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1742, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1823, PETRI_PLACES=156, PETRI_TRANSITIONS=186} [2024-06-20 17:15:33,925 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 114 predicate places. [2024-06-20 17:15:33,926 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 186 transitions, 1823 flow [2024-06-20 17:15:33,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:15:33,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:15:33,926 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:15:33,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-20 17:15:33,926 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:15:33,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:15:33,927 INFO L85 PathProgramCache]: Analyzing trace with hash -703290453, now seen corresponding path program 3 times [2024-06-20 17:15:33,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:15:33,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633241282] [2024-06-20 17:15:33,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:15:33,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:15:33,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:15:37,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:15:37,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:15:37,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633241282] [2024-06-20 17:15:37,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633241282] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:15:37,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:15:37,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:15:37,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078072888] [2024-06-20 17:15:37,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:15:37,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:15:37,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:15:37,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:15:37,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:15:37,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:15:37,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 186 transitions, 1823 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:15:37,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:15:37,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:15:37,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:15:38,369 INFO L124 PetriNetUnfolderBase]: 1659/2654 cut-off events. [2024-06-20 17:15:38,369 INFO L125 PetriNetUnfolderBase]: For 83574/83586 co-relation queries the response was YES. [2024-06-20 17:15:38,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17364 conditions, 2654 events. 1659/2654 cut-off events. For 83574/83586 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 13776 event pairs, 385 based on Foata normal form. 21/2668 useless extension candidates. Maximal degree in co-relation 17289. Up to 2402 conditions per place. [2024-06-20 17:15:38,387 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 159 selfloop transitions, 30 changer transitions 0/211 dead transitions. [2024-06-20 17:15:38,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 211 transitions, 2341 flow [2024-06-20 17:15:38,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:15:38,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:15:38,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-20 17:15:38,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-20 17:15:38,389 INFO L175 Difference]: Start difference. First operand has 156 places, 186 transitions, 1823 flow. Second operand 8 states and 128 transitions. [2024-06-20 17:15:38,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 211 transitions, 2341 flow [2024-06-20 17:15:38,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 211 transitions, 2311 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-20 17:15:38,453 INFO L231 Difference]: Finished difference. Result has 160 places, 188 transitions, 1896 flow [2024-06-20 17:15:38,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1793, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1896, PETRI_PLACES=160, PETRI_TRANSITIONS=188} [2024-06-20 17:15:38,454 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 118 predicate places. [2024-06-20 17:15:38,454 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 188 transitions, 1896 flow [2024-06-20 17:15:38,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:15:38,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:15:38,454 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:15:38,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-20 17:15:38,455 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:15:38,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:15:38,455 INFO L85 PathProgramCache]: Analyzing trace with hash -422360149, now seen corresponding path program 4 times [2024-06-20 17:15:38,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:15:38,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240664905] [2024-06-20 17:15:38,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:15:38,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:15:38,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:15:40,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:15:40,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:15:40,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240664905] [2024-06-20 17:15:40,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240664905] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:15:40,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:15:40,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:15:40,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257029457] [2024-06-20 17:15:40,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:15:40,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:15:40,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:15:40,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:15:40,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:15:40,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 17:15:40,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 188 transitions, 1896 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:15:40,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:15:40,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 17:15:40,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:15:41,774 INFO L124 PetriNetUnfolderBase]: 1687/2689 cut-off events. [2024-06-20 17:15:41,774 INFO L125 PetriNetUnfolderBase]: For 86640/86647 co-relation queries the response was YES. [2024-06-20 17:15:41,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17860 conditions, 2689 events. 1687/2689 cut-off events. For 86640/86647 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 13970 event pairs, 402 based on Foata normal form. 17/2695 useless extension candidates. Maximal degree in co-relation 17783. Up to 2430 conditions per place. [2024-06-20 17:15:41,793 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 147 selfloop transitions, 43 changer transitions 0/212 dead transitions. [2024-06-20 17:15:41,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 212 transitions, 2414 flow [2024-06-20 17:15:41,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:15:41,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:15:41,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-20 17:15:41,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38109756097560976 [2024-06-20 17:15:41,812 INFO L175 Difference]: Start difference. First operand has 160 places, 188 transitions, 1896 flow. Second operand 8 states and 125 transitions. [2024-06-20 17:15:41,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 212 transitions, 2414 flow [2024-06-20 17:15:41,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 212 transitions, 2319 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-20 17:15:41,907 INFO L231 Difference]: Finished difference. Result has 164 places, 195 transitions, 1985 flow [2024-06-20 17:15:41,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1801, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1985, PETRI_PLACES=164, PETRI_TRANSITIONS=195} [2024-06-20 17:15:41,907 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 122 predicate places. [2024-06-20 17:15:41,907 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 195 transitions, 1985 flow [2024-06-20 17:15:41,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:15:41,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:15:41,908 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:15:41,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-20 17:15:41,908 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:15:41,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:15:41,908 INFO L85 PathProgramCache]: Analyzing trace with hash -422360025, now seen corresponding path program 4 times [2024-06-20 17:15:41,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:15:41,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771981276] [2024-06-20 17:15:41,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:15:41,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:15:41,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:15:44,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:15:44,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:15:44,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771981276] [2024-06-20 17:15:44,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771981276] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:15:44,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:15:44,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:15:44,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649178648] [2024-06-20 17:15:44,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:15:44,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:15:44,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:15:44,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:15:44,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:15:44,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:15:44,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 195 transitions, 1985 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:15:44,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:15:44,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:15:44,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:15:45,233 INFO L124 PetriNetUnfolderBase]: 1757/2775 cut-off events. [2024-06-20 17:15:45,233 INFO L125 PetriNetUnfolderBase]: For 84627/84629 co-relation queries the response was YES. [2024-06-20 17:15:45,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18454 conditions, 2775 events. 1757/2775 cut-off events. For 84627/84629 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 14339 event pairs, 400 based on Foata normal form. 2/2775 useless extension candidates. Maximal degree in co-relation 18374. Up to 2664 conditions per place. [2024-06-20 17:15:45,253 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 187 selfloop transitions, 31 changer transitions 0/222 dead transitions. [2024-06-20 17:15:45,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 222 transitions, 2714 flow [2024-06-20 17:15:45,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:15:45,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:15:45,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 130 transitions. [2024-06-20 17:15:45,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3523035230352303 [2024-06-20 17:15:45,256 INFO L175 Difference]: Start difference. First operand has 164 places, 195 transitions, 1985 flow. Second operand 9 states and 130 transitions. [2024-06-20 17:15:45,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 222 transitions, 2714 flow [2024-06-20 17:15:45,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 222 transitions, 2643 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-20 17:15:45,341 INFO L231 Difference]: Finished difference. Result has 170 places, 203 transitions, 2102 flow [2024-06-20 17:15:45,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1915, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2102, PETRI_PLACES=170, PETRI_TRANSITIONS=203} [2024-06-20 17:15:45,342 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 128 predicate places. [2024-06-20 17:15:45,342 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 203 transitions, 2102 flow [2024-06-20 17:15:45,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:15:45,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:15:45,342 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:15:45,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-20 17:15:45,343 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:15:45,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:15:45,343 INFO L85 PathProgramCache]: Analyzing trace with hash 1257818971, now seen corresponding path program 5 times [2024-06-20 17:15:45,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:15:45,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346271965] [2024-06-20 17:15:45,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:15:45,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:15:45,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:15:47,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:15:47,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:15:47,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346271965] [2024-06-20 17:15:47,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346271965] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:15:47,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:15:47,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:15:47,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227318532] [2024-06-20 17:15:47,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:15:47,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:15:47,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:15:47,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:15:47,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:15:47,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:15:47,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 203 transitions, 2102 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:15:47,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:15:47,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:15:47,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:15:48,858 INFO L124 PetriNetUnfolderBase]: 1769/2792 cut-off events. [2024-06-20 17:15:48,859 INFO L125 PetriNetUnfolderBase]: For 89587/89589 co-relation queries the response was YES. [2024-06-20 17:15:48,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18932 conditions, 2792 events. 1769/2792 cut-off events. For 89587/89589 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 14462 event pairs, 403 based on Foata normal form. 2/2792 useless extension candidates. Maximal degree in co-relation 18850. Up to 2706 conditions per place. [2024-06-20 17:15:48,879 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 197 selfloop transitions, 22 changer transitions 0/223 dead transitions. [2024-06-20 17:15:48,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 223 transitions, 2714 flow [2024-06-20 17:15:48,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:15:48,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:15:48,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 115 transitions. [2024-06-20 17:15:48,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35060975609756095 [2024-06-20 17:15:48,880 INFO L175 Difference]: Start difference. First operand has 170 places, 203 transitions, 2102 flow. Second operand 8 states and 115 transitions. [2024-06-20 17:15:48,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 223 transitions, 2714 flow [2024-06-20 17:15:48,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 223 transitions, 2620 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-20 17:15:48,977 INFO L231 Difference]: Finished difference. Result has 174 places, 207 transitions, 2133 flow [2024-06-20 17:15:48,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2021, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2133, PETRI_PLACES=174, PETRI_TRANSITIONS=207} [2024-06-20 17:15:48,977 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 132 predicate places. [2024-06-20 17:15:48,977 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 207 transitions, 2133 flow [2024-06-20 17:15:48,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:15:48,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:15:48,978 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:15:48,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-20 17:15:48,978 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:15:48,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:15:48,978 INFO L85 PathProgramCache]: Analyzing trace with hash -415688949, now seen corresponding path program 1 times [2024-06-20 17:15:48,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:15:48,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581195268] [2024-06-20 17:15:48,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:15:48,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:15:48,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:15:51,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:15:51,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:15:51,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581195268] [2024-06-20 17:15:51,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581195268] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:15:51,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:15:51,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:15:51,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414895440] [2024-06-20 17:15:51,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:15:51,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:15:51,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:15:51,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:15:51,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:15:51,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:15:51,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 207 transitions, 2133 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:15:51,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:15:51,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:15:51,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:15:52,715 INFO L124 PetriNetUnfolderBase]: 1764/2785 cut-off events. [2024-06-20 17:15:52,716 INFO L125 PetriNetUnfolderBase]: For 91734/91736 co-relation queries the response was YES. [2024-06-20 17:15:52,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18931 conditions, 2785 events. 1764/2785 cut-off events. For 91734/91736 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 14420 event pairs, 403 based on Foata normal form. 1/2784 useless extension candidates. Maximal degree in co-relation 18846. Up to 2711 conditions per place. [2024-06-20 17:15:52,740 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 197 selfloop transitions, 19 changer transitions 0/220 dead transitions. [2024-06-20 17:15:52,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 220 transitions, 2601 flow [2024-06-20 17:15:52,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:15:52,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:15:52,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 102 transitions. [2024-06-20 17:15:52,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3554006968641115 [2024-06-20 17:15:52,742 INFO L175 Difference]: Start difference. First operand has 174 places, 207 transitions, 2133 flow. Second operand 7 states and 102 transitions. [2024-06-20 17:15:52,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 220 transitions, 2601 flow [2024-06-20 17:15:52,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 220 transitions, 2530 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-20 17:15:52,861 INFO L231 Difference]: Finished difference. Result has 176 places, 207 transitions, 2110 flow [2024-06-20 17:15:52,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2062, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2110, PETRI_PLACES=176, PETRI_TRANSITIONS=207} [2024-06-20 17:15:52,862 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 134 predicate places. [2024-06-20 17:15:52,862 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 207 transitions, 2110 flow [2024-06-20 17:15:52,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:15:52,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:15:52,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:15:52,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-20 17:15:52,863 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:15:52,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:15:52,863 INFO L85 PathProgramCache]: Analyzing trace with hash -422355375, now seen corresponding path program 6 times [2024-06-20 17:15:52,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:15:52,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873445244] [2024-06-20 17:15:52,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:15:52,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:15:52,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:15:55,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:15:55,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:15:55,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873445244] [2024-06-20 17:15:55,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873445244] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:15:55,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:15:55,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:15:55,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282184564] [2024-06-20 17:15:55,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:15:55,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:15:55,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:15:55,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:15:55,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:15:56,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:15:56,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 207 transitions, 2110 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:15:56,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:15:56,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:15:56,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:15:56,904 INFO L124 PetriNetUnfolderBase]: 1758/2777 cut-off events. [2024-06-20 17:15:56,904 INFO L125 PetriNetUnfolderBase]: For 94646/94648 co-relation queries the response was YES. [2024-06-20 17:15:56,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18869 conditions, 2777 events. 1758/2777 cut-off events. For 94646/94648 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 14365 event pairs, 400 based on Foata normal form. 2/2777 useless extension candidates. Maximal degree in co-relation 18783. Up to 2692 conditions per place. [2024-06-20 17:15:56,924 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 198 selfloop transitions, 22 changer transitions 0/224 dead transitions. [2024-06-20 17:15:56,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 224 transitions, 2605 flow [2024-06-20 17:15:56,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:15:56,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:15:56,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 116 transitions. [2024-06-20 17:15:56,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35365853658536583 [2024-06-20 17:15:56,925 INFO L175 Difference]: Start difference. First operand has 176 places, 207 transitions, 2110 flow. Second operand 8 states and 116 transitions. [2024-06-20 17:15:56,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 224 transitions, 2605 flow [2024-06-20 17:15:57,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 224 transitions, 2547 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-20 17:15:57,038 INFO L231 Difference]: Finished difference. Result has 178 places, 208 transitions, 2113 flow [2024-06-20 17:15:57,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2054, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2113, PETRI_PLACES=178, PETRI_TRANSITIONS=208} [2024-06-20 17:15:57,038 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 136 predicate places. [2024-06-20 17:15:57,038 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 208 transitions, 2113 flow [2024-06-20 17:15:57,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:15:57,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:15:57,039 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:15:57,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-20 17:15:57,039 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:15:57,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:15:57,039 INFO L85 PathProgramCache]: Analyzing trace with hash 804728650, now seen corresponding path program 1 times [2024-06-20 17:15:57,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:15:57,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145592161] [2024-06-20 17:15:57,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:15:57,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:15:57,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:15:59,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:15:59,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:15:59,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145592161] [2024-06-20 17:15:59,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145592161] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:15:59,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:15:59,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:15:59,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947697073] [2024-06-20 17:15:59,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:15:59,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:15:59,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:15:59,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:15:59,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:15:59,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:15:59,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 208 transitions, 2113 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:15:59,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:15:59,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:15:59,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:16:00,713 INFO L124 PetriNetUnfolderBase]: 1766/2790 cut-off events. [2024-06-20 17:16:00,713 INFO L125 PetriNetUnfolderBase]: For 98903/98905 co-relation queries the response was YES. [2024-06-20 17:16:00,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19059 conditions, 2790 events. 1766/2790 cut-off events. For 98903/98905 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 14358 event pairs, 313 based on Foata normal form. 2/2785 useless extension candidates. Maximal degree in co-relation 18972. Up to 2587 conditions per place. [2024-06-20 17:16:00,737 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 199 selfloop transitions, 27 changer transitions 0/230 dead transitions. [2024-06-20 17:16:00,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 230 transitions, 2767 flow [2024-06-20 17:16:00,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:16:00,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:16:00,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 98 transitions. [2024-06-20 17:16:00,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3983739837398374 [2024-06-20 17:16:00,739 INFO L175 Difference]: Start difference. First operand has 178 places, 208 transitions, 2113 flow. Second operand 6 states and 98 transitions. [2024-06-20 17:16:00,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 230 transitions, 2767 flow [2024-06-20 17:16:00,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 230 transitions, 2713 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-20 17:16:00,878 INFO L231 Difference]: Finished difference. Result has 178 places, 212 transitions, 2198 flow [2024-06-20 17:16:00,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2059, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2198, PETRI_PLACES=178, PETRI_TRANSITIONS=212} [2024-06-20 17:16:00,879 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 136 predicate places. [2024-06-20 17:16:00,879 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 212 transitions, 2198 flow [2024-06-20 17:16:00,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:16:00,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:16:00,879 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:16:00,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-20 17:16:00,880 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:16:00,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:16:00,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1834439602, now seen corresponding path program 2 times [2024-06-20 17:16:00,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:16:00,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876694460] [2024-06-20 17:16:00,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:16:00,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:16:00,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:16:04,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:16:04,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:16:04,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876694460] [2024-06-20 17:16:04,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876694460] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:16:04,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:16:04,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:16:04,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119172719] [2024-06-20 17:16:04,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:16:04,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:16:04,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:16:04,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:16:04,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:16:04,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:16:04,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 212 transitions, 2198 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:16:04,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:16:04,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:16:04,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:16:05,050 INFO L124 PetriNetUnfolderBase]: 1761/2781 cut-off events. [2024-06-20 17:16:05,051 INFO L125 PetriNetUnfolderBase]: For 101825/101827 co-relation queries the response was YES. [2024-06-20 17:16:05,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19136 conditions, 2781 events. 1761/2781 cut-off events. For 101825/101827 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 14334 event pairs, 409 based on Foata normal form. 2/2776 useless extension candidates. Maximal degree in co-relation 19048. Up to 2637 conditions per place. [2024-06-20 17:16:05,077 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 192 selfloop transitions, 28 changer transitions 0/224 dead transitions. [2024-06-20 17:16:05,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 224 transitions, 2670 flow [2024-06-20 17:16:05,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:16:05,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:16:05,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 93 transitions. [2024-06-20 17:16:05,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3780487804878049 [2024-06-20 17:16:05,079 INFO L175 Difference]: Start difference. First operand has 178 places, 212 transitions, 2198 flow. Second operand 6 states and 93 transitions. [2024-06-20 17:16:05,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 224 transitions, 2670 flow [2024-06-20 17:16:05,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 224 transitions, 2582 flow, removed 33 selfloop flow, removed 2 redundant places. [2024-06-20 17:16:05,215 INFO L231 Difference]: Finished difference. Result has 182 places, 212 transitions, 2172 flow [2024-06-20 17:16:05,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2110, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2172, PETRI_PLACES=182, PETRI_TRANSITIONS=212} [2024-06-20 17:16:05,216 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 140 predicate places. [2024-06-20 17:16:05,216 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 212 transitions, 2172 flow [2024-06-20 17:16:05,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:16:05,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:16:05,217 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:16:05,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-20 17:16:05,217 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:16:05,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:16:05,217 INFO L85 PathProgramCache]: Analyzing trace with hash 2116151670, now seen corresponding path program 1 times [2024-06-20 17:16:05,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:16:05,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620295676] [2024-06-20 17:16:05,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:16:05,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:16:05,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:16:08,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:16:08,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:16:08,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620295676] [2024-06-20 17:16:08,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620295676] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:16:08,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:16:08,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:16:08,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485030636] [2024-06-20 17:16:08,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:16:08,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:16:08,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:16:08,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:16:08,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:16:08,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:16:08,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 212 transitions, 2172 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:16:08,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:16:08,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:16:08,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:16:09,009 INFO L124 PetriNetUnfolderBase]: 1766/2790 cut-off events. [2024-06-20 17:16:09,010 INFO L125 PetriNetUnfolderBase]: For 105169/105171 co-relation queries the response was YES. [2024-06-20 17:16:09,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19284 conditions, 2790 events. 1766/2790 cut-off events. For 105169/105171 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 14418 event pairs, 408 based on Foata normal form. 1/2784 useless extension candidates. Maximal degree in co-relation 19194. Up to 2597 conditions per place. [2024-06-20 17:16:09,037 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 193 selfloop transitions, 33 changer transitions 0/230 dead transitions. [2024-06-20 17:16:09,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 230 transitions, 2736 flow [2024-06-20 17:16:09,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:16:09,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:16:09,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 99 transitions. [2024-06-20 17:16:09,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-20 17:16:09,038 INFO L175 Difference]: Start difference. First operand has 182 places, 212 transitions, 2172 flow. Second operand 6 states and 99 transitions. [2024-06-20 17:16:09,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 230 transitions, 2736 flow [2024-06-20 17:16:09,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 230 transitions, 2674 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-20 17:16:09,159 INFO L231 Difference]: Finished difference. Result has 183 places, 215 transitions, 2267 flow [2024-06-20 17:16:09,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2110, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2267, PETRI_PLACES=183, PETRI_TRANSITIONS=215} [2024-06-20 17:16:09,160 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 141 predicate places. [2024-06-20 17:16:09,160 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 215 transitions, 2267 flow [2024-06-20 17:16:09,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:16:09,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:16:09,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:16:09,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-20 17:16:09,161 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:16:09,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:16:09,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1079069752, now seen corresponding path program 2 times [2024-06-20 17:16:09,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:16:09,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127337683] [2024-06-20 17:16:09,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:16:09,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:16:09,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:16:12,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:16:12,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:16:12,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127337683] [2024-06-20 17:16:12,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127337683] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:16:12,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:16:12,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:16:12,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690573920] [2024-06-20 17:16:12,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:16:12,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:16:12,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:16:12,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:16:12,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:16:12,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:16:12,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 215 transitions, 2267 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:16:12,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:16:12,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:16:12,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:16:13,258 INFO L124 PetriNetUnfolderBase]: 1776/2806 cut-off events. [2024-06-20 17:16:13,259 INFO L125 PetriNetUnfolderBase]: For 112083/112085 co-relation queries the response was YES. [2024-06-20 17:16:13,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19814 conditions, 2806 events. 1776/2806 cut-off events. For 112083/112085 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 14559 event pairs, 413 based on Foata normal form. 2/2801 useless extension candidates. Maximal degree in co-relation 19723. Up to 2549 conditions per place. [2024-06-20 17:16:13,282 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 175 selfloop transitions, 60 changer transitions 0/239 dead transitions. [2024-06-20 17:16:13,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 239 transitions, 3039 flow [2024-06-20 17:16:13,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:16:13,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:16:13,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-20 17:16:13,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40069686411149824 [2024-06-20 17:16:13,284 INFO L175 Difference]: Start difference. First operand has 183 places, 215 transitions, 2267 flow. Second operand 7 states and 115 transitions. [2024-06-20 17:16:13,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 239 transitions, 3039 flow [2024-06-20 17:16:13,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 239 transitions, 2932 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-20 17:16:13,425 INFO L231 Difference]: Finished difference. Result has 186 places, 222 transitions, 2468 flow [2024-06-20 17:16:13,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2160, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2468, PETRI_PLACES=186, PETRI_TRANSITIONS=222} [2024-06-20 17:16:13,425 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 144 predicate places. [2024-06-20 17:16:13,425 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 222 transitions, 2468 flow [2024-06-20 17:16:13,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:16:13,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:16:13,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:16:13,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-20 17:16:13,426 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:16:13,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:16:13,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1291132705, now seen corresponding path program 1 times [2024-06-20 17:16:13,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:16:13,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255355866] [2024-06-20 17:16:13,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:16:13,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:16:13,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:16:15,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:16:15,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:16:15,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255355866] [2024-06-20 17:16:15,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255355866] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:16:15,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:16:15,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:16:15,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779436945] [2024-06-20 17:16:15,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:16:15,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:16:15,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:16:15,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:16:15,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:16:15,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:16:15,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 222 transitions, 2468 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:16:15,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:16:15,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:16:15,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:16:16,947 INFO L124 PetriNetUnfolderBase]: 1832/2901 cut-off events. [2024-06-20 17:16:16,948 INFO L125 PetriNetUnfolderBase]: For 123016/123026 co-relation queries the response was YES. [2024-06-20 17:16:16,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20918 conditions, 2901 events. 1832/2901 cut-off events. For 123016/123026 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 15156 event pairs, 390 based on Foata normal form. 12/2909 useless extension candidates. Maximal degree in co-relation 20826. Up to 2735 conditions per place. [2024-06-20 17:16:16,970 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 220 selfloop transitions, 31 changer transitions 0/255 dead transitions. [2024-06-20 17:16:16,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 255 transitions, 3245 flow [2024-06-20 17:16:16,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:16:16,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:16:16,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-20 17:16:16,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-20 17:16:16,972 INFO L175 Difference]: Start difference. First operand has 186 places, 222 transitions, 2468 flow. Second operand 7 states and 112 transitions. [2024-06-20 17:16:16,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 255 transitions, 3245 flow [2024-06-20 17:16:17,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 255 transitions, 3088 flow, removed 50 selfloop flow, removed 3 redundant places. [2024-06-20 17:16:17,108 INFO L231 Difference]: Finished difference. Result has 192 places, 235 transitions, 2636 flow [2024-06-20 17:16:17,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2316, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2636, PETRI_PLACES=192, PETRI_TRANSITIONS=235} [2024-06-20 17:16:17,108 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 150 predicate places. [2024-06-20 17:16:17,108 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 235 transitions, 2636 flow [2024-06-20 17:16:17,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:16:17,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:16:17,109 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:16:17,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-20 17:16:17,109 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:16:17,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:16:17,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1438742305, now seen corresponding path program 2 times [2024-06-20 17:16:17,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:16:17,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931759890] [2024-06-20 17:16:17,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:16:17,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:16:17,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:16:19,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:16:19,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:16:19,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931759890] [2024-06-20 17:16:19,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931759890] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:16:19,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:16:19,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:16:19,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697331569] [2024-06-20 17:16:19,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:16:19,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:16:19,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:16:19,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:16:19,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:16:19,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:16:19,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 235 transitions, 2636 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:16:19,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:16:19,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:16:19,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:16:20,439 INFO L124 PetriNetUnfolderBase]: 1894/2982 cut-off events. [2024-06-20 17:16:20,439 INFO L125 PetriNetUnfolderBase]: For 134535/134537 co-relation queries the response was YES. [2024-06-20 17:16:20,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22332 conditions, 2982 events. 1894/2982 cut-off events. For 134535/134537 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 15593 event pairs, 403 based on Foata normal form. 4/2979 useless extension candidates. Maximal degree in co-relation 22236. Up to 2709 conditions per place. [2024-06-20 17:16:20,467 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 200 selfloop transitions, 63 changer transitions 0/267 dead transitions. [2024-06-20 17:16:20,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 267 transitions, 3568 flow [2024-06-20 17:16:20,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:16:20,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:16:20,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-20 17:16:20,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38414634146341464 [2024-06-20 17:16:20,468 INFO L175 Difference]: Start difference. First operand has 192 places, 235 transitions, 2636 flow. Second operand 8 states and 126 transitions. [2024-06-20 17:16:20,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 267 transitions, 3568 flow [2024-06-20 17:16:20,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 267 transitions, 3456 flow, removed 40 selfloop flow, removed 3 redundant places. [2024-06-20 17:16:20,633 INFO L231 Difference]: Finished difference. Result has 198 places, 246 transitions, 2915 flow [2024-06-20 17:16:20,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2524, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2915, PETRI_PLACES=198, PETRI_TRANSITIONS=246} [2024-06-20 17:16:20,634 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 156 predicate places. [2024-06-20 17:16:20,634 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 246 transitions, 2915 flow [2024-06-20 17:16:20,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:16:20,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:16:20,634 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:16:20,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-20 17:16:20,635 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:16:20,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:16:20,635 INFO L85 PathProgramCache]: Analyzing trace with hash 1438949695, now seen corresponding path program 3 times [2024-06-20 17:16:20,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:16:20,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049260892] [2024-06-20 17:16:20,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:16:20,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:16:20,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:16:22,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:16:22,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:16:22,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049260892] [2024-06-20 17:16:22,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049260892] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:16:22,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:16:22,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:16:22,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106567430] [2024-06-20 17:16:22,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:16:22,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:16:22,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:16:22,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:16:22,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:16:22,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:16:22,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 246 transitions, 2915 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:16:22,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:16:22,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:16:22,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:16:24,003 INFO L124 PetriNetUnfolderBase]: 1898/2988 cut-off events. [2024-06-20 17:16:24,004 INFO L125 PetriNetUnfolderBase]: For 140001/140003 co-relation queries the response was YES. [2024-06-20 17:16:24,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22711 conditions, 2988 events. 1898/2988 cut-off events. For 140001/140003 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 15601 event pairs, 405 based on Foata normal form. 4/2985 useless extension candidates. Maximal degree in co-relation 22613. Up to 2793 conditions per place. [2024-06-20 17:16:24,032 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 225 selfloop transitions, 40 changer transitions 0/269 dead transitions. [2024-06-20 17:16:24,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 269 transitions, 3646 flow [2024-06-20 17:16:24,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:16:24,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:16:24,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 109 transitions. [2024-06-20 17:16:24,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3797909407665505 [2024-06-20 17:16:24,034 INFO L175 Difference]: Start difference. First operand has 198 places, 246 transitions, 2915 flow. Second operand 7 states and 109 transitions. [2024-06-20 17:16:24,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 269 transitions, 3646 flow [2024-06-20 17:16:24,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 269 transitions, 3522 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-20 17:16:24,212 INFO L231 Difference]: Finished difference. Result has 201 places, 254 transitions, 3040 flow [2024-06-20 17:16:24,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2801, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3040, PETRI_PLACES=201, PETRI_TRANSITIONS=254} [2024-06-20 17:16:24,212 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 159 predicate places. [2024-06-20 17:16:24,212 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 254 transitions, 3040 flow [2024-06-20 17:16:24,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:16:24,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:16:24,213 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:16:24,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-20 17:16:24,213 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:16:24,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:16:24,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1139449897, now seen corresponding path program 1 times [2024-06-20 17:16:24,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:16:24,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216633216] [2024-06-20 17:16:24,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:16:24,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:16:24,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:16:27,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:16:27,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:16:27,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216633216] [2024-06-20 17:16:27,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216633216] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:16:27,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:16:27,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:16:27,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802787710] [2024-06-20 17:16:27,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:16:27,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:16:27,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:16:27,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:16:27,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:16:27,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:16:27,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 254 transitions, 3040 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:16:27,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:16:27,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:16:27,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:16:28,665 INFO L124 PetriNetUnfolderBase]: 1942/3060 cut-off events. [2024-06-20 17:16:28,665 INFO L125 PetriNetUnfolderBase]: For 147198/147200 co-relation queries the response was YES. [2024-06-20 17:16:28,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23303 conditions, 3060 events. 1942/3060 cut-off events. For 147198/147200 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 16063 event pairs, 407 based on Foata normal form. 12/3065 useless extension candidates. Maximal degree in co-relation 23203. Up to 2802 conditions per place. [2024-06-20 17:16:28,695 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 226 selfloop transitions, 44 changer transitions 0/274 dead transitions. [2024-06-20 17:16:28,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 274 transitions, 3732 flow [2024-06-20 17:16:28,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:16:28,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:16:28,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-20 17:16:28,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-20 17:16:28,697 INFO L175 Difference]: Start difference. First operand has 201 places, 254 transitions, 3040 flow. Second operand 7 states and 112 transitions. [2024-06-20 17:16:28,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 274 transitions, 3732 flow [2024-06-20 17:16:28,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 274 transitions, 3626 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-20 17:16:28,867 INFO L231 Difference]: Finished difference. Result has 204 places, 255 transitions, 3056 flow [2024-06-20 17:16:28,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2936, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3056, PETRI_PLACES=204, PETRI_TRANSITIONS=255} [2024-06-20 17:16:28,867 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 162 predicate places. [2024-06-20 17:16:28,867 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 255 transitions, 3056 flow [2024-06-20 17:16:28,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:16:28,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:16:28,868 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:16:28,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-20 17:16:28,868 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:16:28,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:16:28,868 INFO L85 PathProgramCache]: Analyzing trace with hash -652152253, now seen corresponding path program 4 times [2024-06-20 17:16:28,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:16:28,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117374586] [2024-06-20 17:16:28,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:16:28,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:16:28,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:16:32,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:16:32,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:16:32,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117374586] [2024-06-20 17:16:32,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117374586] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:16:32,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:16:32,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:16:32,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896872842] [2024-06-20 17:16:32,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:16:32,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:16:32,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:16:32,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:16:32,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:16:32,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:16:32,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 255 transitions, 3056 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:16:32,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:16:32,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:16:32,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:16:33,218 INFO L124 PetriNetUnfolderBase]: 1967/3100 cut-off events. [2024-06-20 17:16:33,219 INFO L125 PetriNetUnfolderBase]: For 145584/145594 co-relation queries the response was YES. [2024-06-20 17:16:33,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23643 conditions, 3100 events. 1967/3100 cut-off events. For 145584/145594 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 16312 event pairs, 400 based on Foata normal form. 12/3108 useless extension candidates. Maximal degree in co-relation 23542. Up to 2917 conditions per place. [2024-06-20 17:16:33,246 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 253 selfloop transitions, 30 changer transitions 0/287 dead transitions. [2024-06-20 17:16:33,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 287 transitions, 3845 flow [2024-06-20 17:16:33,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:16:33,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:16:33,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-20 17:16:33,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38414634146341464 [2024-06-20 17:16:33,247 INFO L175 Difference]: Start difference. First operand has 204 places, 255 transitions, 3056 flow. Second operand 8 states and 126 transitions. [2024-06-20 17:16:33,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 287 transitions, 3845 flow [2024-06-20 17:16:33,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 287 transitions, 3763 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-20 17:16:33,414 INFO L231 Difference]: Finished difference. Result has 208 places, 262 transitions, 3200 flow [2024-06-20 17:16:33,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2974, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3200, PETRI_PLACES=208, PETRI_TRANSITIONS=262} [2024-06-20 17:16:33,415 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 166 predicate places. [2024-06-20 17:16:33,415 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 262 transitions, 3200 flow [2024-06-20 17:16:33,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:16:33,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:16:33,415 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:16:33,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-20 17:16:33,416 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:16:33,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:16:33,416 INFO L85 PathProgramCache]: Analyzing trace with hash -327025183, now seen corresponding path program 5 times [2024-06-20 17:16:33,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:16:33,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138099787] [2024-06-20 17:16:33,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:16:33,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:16:33,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:16:36,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:16:36,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:16:36,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138099787] [2024-06-20 17:16:36,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138099787] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:16:36,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:16:36,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:16:36,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159131209] [2024-06-20 17:16:36,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:16:36,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:16:36,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:16:36,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:16:36,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:16:36,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:16:36,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 262 transitions, 3200 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:16:36,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:16:36,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:16:36,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:16:37,206 INFO L124 PetriNetUnfolderBase]: 1993/3140 cut-off events. [2024-06-20 17:16:37,207 INFO L125 PetriNetUnfolderBase]: For 152820/152830 co-relation queries the response was YES. [2024-06-20 17:16:37,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24508 conditions, 3140 events. 1993/3140 cut-off events. For 152820/152830 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 16552 event pairs, 399 based on Foata normal form. 10/3146 useless extension candidates. Maximal degree in co-relation 24405. Up to 2906 conditions per place. [2024-06-20 17:16:37,236 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 235 selfloop transitions, 51 changer transitions 0/290 dead transitions. [2024-06-20 17:16:37,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 290 transitions, 4074 flow [2024-06-20 17:16:37,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:16:37,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:16:37,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-20 17:16:37,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38109756097560976 [2024-06-20 17:16:37,238 INFO L175 Difference]: Start difference. First operand has 208 places, 262 transitions, 3200 flow. Second operand 8 states and 125 transitions. [2024-06-20 17:16:37,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 290 transitions, 4074 flow [2024-06-20 17:16:37,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 290 transitions, 3910 flow, removed 55 selfloop flow, removed 5 redundant places. [2024-06-20 17:16:37,438 INFO L231 Difference]: Finished difference. Result has 211 places, 268 transitions, 3290 flow [2024-06-20 17:16:37,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3036, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3290, PETRI_PLACES=211, PETRI_TRANSITIONS=268} [2024-06-20 17:16:37,438 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 169 predicate places. [2024-06-20 17:16:37,438 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 268 transitions, 3290 flow [2024-06-20 17:16:37,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:16:37,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:16:37,439 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:16:37,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-20 17:16:37,439 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:16:37,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:16:37,439 INFO L85 PathProgramCache]: Analyzing trace with hash 833360331, now seen corresponding path program 6 times [2024-06-20 17:16:37,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:16:37,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712889945] [2024-06-20 17:16:37,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:16:37,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:16:37,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:16:40,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:16:40,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:16:40,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712889945] [2024-06-20 17:16:40,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712889945] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:16:40,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:16:40,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:16:40,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726773993] [2024-06-20 17:16:40,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:16:40,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:16:40,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:16:40,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:16:40,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:16:40,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:16:40,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 268 transitions, 3290 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:16:40,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:16:40,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:16:40,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:16:41,304 INFO L124 PetriNetUnfolderBase]: 1987/3132 cut-off events. [2024-06-20 17:16:41,304 INFO L125 PetriNetUnfolderBase]: For 155745/155755 co-relation queries the response was YES. [2024-06-20 17:16:41,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24438 conditions, 3132 events. 1987/3132 cut-off events. For 155745/155755 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 16485 event pairs, 402 based on Foata normal form. 10/3138 useless extension candidates. Maximal degree in co-relation 24335. Up to 2939 conditions per place. [2024-06-20 17:16:41,334 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 246 selfloop transitions, 38 changer transitions 0/288 dead transitions. [2024-06-20 17:16:41,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 288 transitions, 3920 flow [2024-06-20 17:16:41,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:16:41,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:16:41,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-20 17:16:41,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36890243902439024 [2024-06-20 17:16:41,336 INFO L175 Difference]: Start difference. First operand has 211 places, 268 transitions, 3290 flow. Second operand 8 states and 121 transitions. [2024-06-20 17:16:41,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 288 transitions, 3920 flow [2024-06-20 17:16:41,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 288 transitions, 3767 flow, removed 55 selfloop flow, removed 4 redundant places. [2024-06-20 17:16:41,524 INFO L231 Difference]: Finished difference. Result has 215 places, 268 transitions, 3219 flow [2024-06-20 17:16:41,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3137, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3219, PETRI_PLACES=215, PETRI_TRANSITIONS=268} [2024-06-20 17:16:41,525 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 173 predicate places. [2024-06-20 17:16:41,525 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 268 transitions, 3219 flow [2024-06-20 17:16:41,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:16:41,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:16:41,525 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:16:41,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-20 17:16:41,525 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:16:41,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:16:41,526 INFO L85 PathProgramCache]: Analyzing trace with hash -208120351, now seen corresponding path program 7 times [2024-06-20 17:16:41,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:16:41,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132444650] [2024-06-20 17:16:41,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:16:41,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:16:41,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:16:43,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:16:43,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:16:43,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132444650] [2024-06-20 17:16:43,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132444650] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:16:43,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:16:43,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:16:43,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564501836] [2024-06-20 17:16:43,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:16:43,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:16:43,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:16:43,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:16:43,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:16:43,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:16:43,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 268 transitions, 3219 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:16:43,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:16:43,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:16:43,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:16:44,784 INFO L124 PetriNetUnfolderBase]: 2055/3223 cut-off events. [2024-06-20 17:16:44,784 INFO L125 PetriNetUnfolderBase]: For 173021/173023 co-relation queries the response was YES. [2024-06-20 17:16:44,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25863 conditions, 3223 events. 2055/3223 cut-off events. For 173021/173023 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 16963 event pairs, 415 based on Foata normal form. 4/3220 useless extension candidates. Maximal degree in co-relation 25758. Up to 2845 conditions per place. [2024-06-20 17:16:44,820 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 219 selfloop transitions, 77 changer transitions 0/300 dead transitions. [2024-06-20 17:16:44,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 300 transitions, 4425 flow [2024-06-20 17:16:44,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:16:44,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:16:44,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-20 17:16:44,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-20 17:16:44,821 INFO L175 Difference]: Start difference. First operand has 215 places, 268 transitions, 3219 flow. Second operand 8 states and 128 transitions. [2024-06-20 17:16:44,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 300 transitions, 4425 flow [2024-06-20 17:16:45,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 300 transitions, 4275 flow, removed 15 selfloop flow, removed 9 redundant places. [2024-06-20 17:16:45,034 INFO L231 Difference]: Finished difference. Result has 214 places, 277 transitions, 3511 flow [2024-06-20 17:16:45,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3069, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3511, PETRI_PLACES=214, PETRI_TRANSITIONS=277} [2024-06-20 17:16:45,035 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 172 predicate places. [2024-06-20 17:16:45,035 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 277 transitions, 3511 flow [2024-06-20 17:16:45,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:16:45,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:16:45,035 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:16:45,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-20 17:16:45,036 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:16:45,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:16:45,036 INFO L85 PathProgramCache]: Analyzing trace with hash -208506301, now seen corresponding path program 8 times [2024-06-20 17:16:45,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:16:45,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215845853] [2024-06-20 17:16:45,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:16:45,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:16:45,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:16:47,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:16:47,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:16:47,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215845853] [2024-06-20 17:16:47,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215845853] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:16:47,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:16:47,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:16:47,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123931691] [2024-06-20 17:16:47,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:16:47,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:16:47,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:16:47,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:16:47,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:16:47,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:16:47,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 277 transitions, 3511 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:16:47,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:16:47,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:16:47,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:16:49,362 INFO L124 PetriNetUnfolderBase]: 2183/3422 cut-off events. [2024-06-20 17:16:49,362 INFO L125 PetriNetUnfolderBase]: For 206456/206458 co-relation queries the response was YES. [2024-06-20 17:16:49,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28950 conditions, 3422 events. 2183/3422 cut-off events. For 206456/206458 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 18170 event pairs, 406 based on Foata normal form. 4/3419 useless extension candidates. Maximal degree in co-relation 28846. Up to 2913 conditions per place. [2024-06-20 17:16:49,393 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 228 selfloop transitions, 91 changer transitions 0/323 dead transitions. [2024-06-20 17:16:49,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 323 transitions, 4842 flow [2024-06-20 17:16:49,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:16:49,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:16:49,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-20 17:16:49,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875338753387534 [2024-06-20 17:16:49,396 INFO L175 Difference]: Start difference. First operand has 214 places, 277 transitions, 3511 flow. Second operand 9 states and 143 transitions. [2024-06-20 17:16:49,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 323 transitions, 4842 flow [2024-06-20 17:16:49,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 323 transitions, 4643 flow, removed 78 selfloop flow, removed 3 redundant places. [2024-06-20 17:16:49,648 INFO L231 Difference]: Finished difference. Result has 221 places, 296 transitions, 4067 flow [2024-06-20 17:16:49,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3344, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4067, PETRI_PLACES=221, PETRI_TRANSITIONS=296} [2024-06-20 17:16:49,649 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 179 predicate places. [2024-06-20 17:16:49,649 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 296 transitions, 4067 flow [2024-06-20 17:16:49,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:16:49,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:16:49,649 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:16:49,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-20 17:16:49,649 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:16:49,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:16:49,650 INFO L85 PathProgramCache]: Analyzing trace with hash -14532481, now seen corresponding path program 9 times [2024-06-20 17:16:49,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:16:49,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54427417] [2024-06-20 17:16:49,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:16:49,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:16:49,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:16:52,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:16:52,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:16:52,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54427417] [2024-06-20 17:16:52,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54427417] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:16:52,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:16:52,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:16:52,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418076542] [2024-06-20 17:16:52,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:16:52,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:16:52,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:16:52,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:16:52,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:16:52,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:16:52,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 296 transitions, 4067 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:16:52,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:16:52,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:16:52,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:16:53,674 INFO L124 PetriNetUnfolderBase]: 2259/3534 cut-off events. [2024-06-20 17:16:53,674 INFO L125 PetriNetUnfolderBase]: For 225800/225802 co-relation queries the response was YES. [2024-06-20 17:16:53,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31178 conditions, 3534 events. 2259/3534 cut-off events. For 225800/225802 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 18823 event pairs, 454 based on Foata normal form. 7/3534 useless extension candidates. Maximal degree in co-relation 31071. Up to 3169 conditions per place. [2024-06-20 17:16:53,707 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 255 selfloop transitions, 78 changer transitions 0/337 dead transitions. [2024-06-20 17:16:53,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 337 transitions, 5391 flow [2024-06-20 17:16:53,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:16:53,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:16:53,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-20 17:16:53,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3794037940379404 [2024-06-20 17:16:53,708 INFO L175 Difference]: Start difference. First operand has 221 places, 296 transitions, 4067 flow. Second operand 9 states and 140 transitions. [2024-06-20 17:16:53,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 337 transitions, 5391 flow [2024-06-20 17:16:54,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 337 transitions, 5218 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-20 17:16:54,017 INFO L231 Difference]: Finished difference. Result has 224 places, 311 transitions, 4506 flow [2024-06-20 17:16:54,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3912, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4506, PETRI_PLACES=224, PETRI_TRANSITIONS=311} [2024-06-20 17:16:54,017 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 182 predicate places. [2024-06-20 17:16:54,017 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 311 transitions, 4506 flow [2024-06-20 17:16:54,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:16:54,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:16:54,018 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:16:54,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-20 17:16:54,022 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:16:54,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:16:54,022 INFO L85 PathProgramCache]: Analyzing trace with hash -8818561, now seen corresponding path program 10 times [2024-06-20 17:16:54,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:16:54,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742183299] [2024-06-20 17:16:54,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:16:54,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:16:54,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:16:56,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:16:56,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:16:56,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742183299] [2024-06-20 17:16:56,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742183299] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:16:56,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:16:56,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:16:56,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362265785] [2024-06-20 17:16:56,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:16:56,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:16:56,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:16:56,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:16:56,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:16:56,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:16:56,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 311 transitions, 4506 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:16:56,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:16:56,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:16:56,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:16:57,580 INFO L124 PetriNetUnfolderBase]: 2244/3507 cut-off events. [2024-06-20 17:16:57,580 INFO L125 PetriNetUnfolderBase]: For 226147/226149 co-relation queries the response was YES. [2024-06-20 17:16:57,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31510 conditions, 3507 events. 2244/3507 cut-off events. For 226147/226149 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 18635 event pairs, 451 based on Foata normal form. 5/3505 useless extension candidates. Maximal degree in co-relation 31402. Up to 3190 conditions per place. [2024-06-20 17:16:57,619 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 262 selfloop transitions, 71 changer transitions 0/337 dead transitions. [2024-06-20 17:16:57,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 337 transitions, 5514 flow [2024-06-20 17:16:57,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:16:57,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:16:57,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-20 17:16:57,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3780487804878049 [2024-06-20 17:16:57,620 INFO L175 Difference]: Start difference. First operand has 224 places, 311 transitions, 4506 flow. Second operand 8 states and 124 transitions. [2024-06-20 17:16:57,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 337 transitions, 5514 flow [2024-06-20 17:16:57,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 337 transitions, 5258 flow, removed 73 selfloop flow, removed 6 redundant places. [2024-06-20 17:16:57,945 INFO L231 Difference]: Finished difference. Result has 226 places, 311 transitions, 4411 flow [2024-06-20 17:16:57,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4260, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4411, PETRI_PLACES=226, PETRI_TRANSITIONS=311} [2024-06-20 17:16:57,946 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 184 predicate places. [2024-06-20 17:16:57,946 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 311 transitions, 4411 flow [2024-06-20 17:16:57,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:16:57,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:16:57,946 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:16:57,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-20 17:16:57,947 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:16:57,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:16:57,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1637535, now seen corresponding path program 2 times [2024-06-20 17:16:57,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:16:57,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124184842] [2024-06-20 17:16:57,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:16:57,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:16:57,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:17:00,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:17:00,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:17:00,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124184842] [2024-06-20 17:17:00,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124184842] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:17:00,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:17:00,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:17:00,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097267459] [2024-06-20 17:17:00,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:17:00,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:17:00,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:17:00,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:17:00,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:17:00,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:17:00,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 311 transitions, 4411 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:17:00,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:17:00,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:17:00,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:17:02,288 INFO L124 PetriNetUnfolderBase]: 2288/3579 cut-off events. [2024-06-20 17:17:02,288 INFO L125 PetriNetUnfolderBase]: For 235398/235400 co-relation queries the response was YES. [2024-06-20 17:17:02,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31714 conditions, 3579 events. 2288/3579 cut-off events. For 235398/235400 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 19084 event pairs, 463 based on Foata normal form. 12/3584 useless extension candidates. Maximal degree in co-relation 31605. Up to 3303 conditions per place. [2024-06-20 17:17:02,330 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 285 selfloop transitions, 45 changer transitions 0/334 dead transitions. [2024-06-20 17:17:02,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 334 transitions, 5296 flow [2024-06-20 17:17:02,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:17:02,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:17:02,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-20 17:17:02,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3780487804878049 [2024-06-20 17:17:02,332 INFO L175 Difference]: Start difference. First operand has 226 places, 311 transitions, 4411 flow. Second operand 8 states and 124 transitions. [2024-06-20 17:17:02,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 334 transitions, 5296 flow [2024-06-20 17:17:02,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 334 transitions, 4985 flow, removed 49 selfloop flow, removed 7 redundant places. [2024-06-20 17:17:02,648 INFO L231 Difference]: Finished difference. Result has 227 places, 312 transitions, 4220 flow [2024-06-20 17:17:02,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4100, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4220, PETRI_PLACES=227, PETRI_TRANSITIONS=312} [2024-06-20 17:17:02,649 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 185 predicate places. [2024-06-20 17:17:02,649 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 312 transitions, 4220 flow [2024-06-20 17:17:02,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:17:02,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:17:02,649 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:17:02,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-20 17:17:02,649 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:17:02,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:17:02,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1192065, now seen corresponding path program 3 times [2024-06-20 17:17:02,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:17:02,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669595489] [2024-06-20 17:17:02,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:17:02,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:17:02,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:17:05,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:17:05,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:17:05,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669595489] [2024-06-20 17:17:05,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669595489] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:17:05,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:17:05,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:17:05,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178088744] [2024-06-20 17:17:05,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:17:05,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:17:05,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:17:05,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:17:05,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:17:05,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:17:05,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 312 transitions, 4220 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:17:05,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:17:05,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:17:05,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:17:07,381 INFO L124 PetriNetUnfolderBase]: 2290/3585 cut-off events. [2024-06-20 17:17:07,381 INFO L125 PetriNetUnfolderBase]: For 229078/229080 co-relation queries the response was YES. [2024-06-20 17:17:07,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31207 conditions, 3585 events. 2290/3585 cut-off events. For 229078/229080 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 19141 event pairs, 446 based on Foata normal form. 8/3586 useless extension candidates. Maximal degree in co-relation 31098. Up to 3211 conditions per place. [2024-06-20 17:17:07,420 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 287 selfloop transitions, 47 changer transitions 0/338 dead transitions. [2024-06-20 17:17:07,420 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 338 transitions, 5161 flow [2024-06-20 17:17:07,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:17:07,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:17:07,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-20 17:17:07,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38109756097560976 [2024-06-20 17:17:07,421 INFO L175 Difference]: Start difference. First operand has 227 places, 312 transitions, 4220 flow. Second operand 8 states and 125 transitions. [2024-06-20 17:17:07,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 338 transitions, 5161 flow [2024-06-20 17:17:07,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 338 transitions, 5066 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-20 17:17:07,767 INFO L231 Difference]: Finished difference. Result has 229 places, 313 transitions, 4250 flow [2024-06-20 17:17:07,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4125, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4250, PETRI_PLACES=229, PETRI_TRANSITIONS=313} [2024-06-20 17:17:07,768 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 187 predicate places. [2024-06-20 17:17:07,768 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 313 transitions, 4250 flow [2024-06-20 17:17:07,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:17:07,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:17:07,768 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:17:07,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-20 17:17:07,768 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:17:07,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:17:07,769 INFO L85 PathProgramCache]: Analyzing trace with hash 943346785, now seen corresponding path program 1 times [2024-06-20 17:17:07,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:17:07,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809506598] [2024-06-20 17:17:07,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:17:07,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:17:07,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:17:10,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:17:10,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:17:10,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809506598] [2024-06-20 17:17:10,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809506598] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:17:10,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:17:10,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:17:10,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218626459] [2024-06-20 17:17:10,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:17:10,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:17:10,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:17:10,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:17:10,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:17:10,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:17:10,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 313 transitions, 4250 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:17:10,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:17:10,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:17:10,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:17:11,951 INFO L124 PetriNetUnfolderBase]: 2377/3717 cut-off events. [2024-06-20 17:17:11,952 INFO L125 PetriNetUnfolderBase]: For 252572/252574 co-relation queries the response was YES. [2024-06-20 17:17:11,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32534 conditions, 3717 events. 2377/3717 cut-off events. For 252572/252574 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 20038 event pairs, 469 based on Foata normal form. 8/3723 useless extension candidates. Maximal degree in co-relation 32424. Up to 3379 conditions per place. [2024-06-20 17:17:11,990 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 305 selfloop transitions, 50 changer transitions 0/359 dead transitions. [2024-06-20 17:17:11,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 359 transitions, 5319 flow [2024-06-20 17:17:11,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:17:11,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:17:11,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-20 17:17:11,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4092140921409214 [2024-06-20 17:17:11,995 INFO L175 Difference]: Start difference. First operand has 229 places, 313 transitions, 4250 flow. Second operand 9 states and 151 transitions. [2024-06-20 17:17:11,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 359 transitions, 5319 flow [2024-06-20 17:17:12,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 359 transitions, 5215 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-20 17:17:12,301 INFO L231 Difference]: Finished difference. Result has 234 places, 318 transitions, 4317 flow [2024-06-20 17:17:12,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4146, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4317, PETRI_PLACES=234, PETRI_TRANSITIONS=318} [2024-06-20 17:17:12,303 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 192 predicate places. [2024-06-20 17:17:12,303 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 318 transitions, 4317 flow [2024-06-20 17:17:12,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:17:12,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:17:12,303 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:17:12,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-20 17:17:12,303 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:17:12,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:17:12,304 INFO L85 PathProgramCache]: Analyzing trace with hash -413853207, now seen corresponding path program 2 times [2024-06-20 17:17:12,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:17:12,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394258536] [2024-06-20 17:17:12,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:17:12,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:17:12,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:17:14,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:17:14,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:17:14,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394258536] [2024-06-20 17:17:14,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394258536] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:17:14,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:17:14,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:17:14,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820519176] [2024-06-20 17:17:14,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:17:14,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:17:14,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:17:14,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:17:14,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:17:14,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:17:14,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 318 transitions, 4317 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:17:14,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:17:14,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:17:14,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:17:16,465 INFO L124 PetriNetUnfolderBase]: 2413/3779 cut-off events. [2024-06-20 17:17:16,465 INFO L125 PetriNetUnfolderBase]: For 260012/260014 co-relation queries the response was YES. [2024-06-20 17:17:16,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33054 conditions, 3779 events. 2413/3779 cut-off events. For 260012/260014 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 20449 event pairs, 489 based on Foata normal form. 10/3787 useless extension candidates. Maximal degree in co-relation 32941. Up to 3558 conditions per place. [2024-06-20 17:17:16,501 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 297 selfloop transitions, 48 changer transitions 0/349 dead transitions. [2024-06-20 17:17:16,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 349 transitions, 5165 flow [2024-06-20 17:17:16,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:17:16,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:17:16,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-20 17:17:16,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875338753387534 [2024-06-20 17:17:16,507 INFO L175 Difference]: Start difference. First operand has 234 places, 318 transitions, 4317 flow. Second operand 9 states and 143 transitions. [2024-06-20 17:17:16,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 349 transitions, 5165 flow [2024-06-20 17:17:16,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 349 transitions, 5087 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-20 17:17:16,914 INFO L231 Difference]: Finished difference. Result has 238 places, 319 transitions, 4355 flow [2024-06-20 17:17:16,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4239, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4355, PETRI_PLACES=238, PETRI_TRANSITIONS=319} [2024-06-20 17:17:16,915 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 196 predicate places. [2024-06-20 17:17:16,915 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 319 transitions, 4355 flow [2024-06-20 17:17:16,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:17:16,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:17:16,915 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:17:16,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-20 17:17:16,916 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:17:16,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:17:16,917 INFO L85 PathProgramCache]: Analyzing trace with hash -413856927, now seen corresponding path program 3 times [2024-06-20 17:17:16,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:17:16,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796366523] [2024-06-20 17:17:16,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:17:16,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:17:16,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:17:19,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:17:19,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:17:19,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796366523] [2024-06-20 17:17:19,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796366523] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:17:19,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:17:19,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:17:19,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398186533] [2024-06-20 17:17:19,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:17:19,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:17:19,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:17:19,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:17:19,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:17:19,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:17:19,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 319 transitions, 4355 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:17:19,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:17:19,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:17:19,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:17:20,922 INFO L124 PetriNetUnfolderBase]: 2441/3823 cut-off events. [2024-06-20 17:17:20,922 INFO L125 PetriNetUnfolderBase]: For 265507/265509 co-relation queries the response was YES. [2024-06-20 17:17:20,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33519 conditions, 3823 events. 2441/3823 cut-off events. For 265507/265509 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 20741 event pairs, 483 based on Foata normal form. 8/3829 useless extension candidates. Maximal degree in co-relation 33406. Up to 3564 conditions per place. [2024-06-20 17:17:20,965 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 302 selfloop transitions, 50 changer transitions 0/356 dead transitions. [2024-06-20 17:17:20,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 356 transitions, 5281 flow [2024-06-20 17:17:20,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:17:20,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:17:20,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-20 17:17:20,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3983739837398374 [2024-06-20 17:17:20,967 INFO L175 Difference]: Start difference. First operand has 238 places, 319 transitions, 4355 flow. Second operand 9 states and 147 transitions. [2024-06-20 17:17:20,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 356 transitions, 5281 flow [2024-06-20 17:17:21,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 356 transitions, 5148 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-20 17:17:21,381 INFO L231 Difference]: Finished difference. Result has 241 places, 322 transitions, 4377 flow [2024-06-20 17:17:21,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4226, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4377, PETRI_PLACES=241, PETRI_TRANSITIONS=322} [2024-06-20 17:17:21,381 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 199 predicate places. [2024-06-20 17:17:21,381 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 322 transitions, 4377 flow [2024-06-20 17:17:21,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:17:21,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:17:21,382 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:17:21,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-20 17:17:21,382 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:17:21,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:17:21,382 INFO L85 PathProgramCache]: Analyzing trace with hash 1032066367, now seen corresponding path program 1 times [2024-06-20 17:17:21,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:17:21,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603478220] [2024-06-20 17:17:21,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:17:21,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:17:21,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:17:25,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:17:25,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:17:25,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603478220] [2024-06-20 17:17:25,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603478220] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:17:25,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:17:25,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:17:25,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307450300] [2024-06-20 17:17:25,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:17:25,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:17:25,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:17:25,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:17:25,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:17:25,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:17:25,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 322 transitions, 4377 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:17:25,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:17:25,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:17:25,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:17:26,375 INFO L124 PetriNetUnfolderBase]: 2485/3891 cut-off events. [2024-06-20 17:17:26,376 INFO L125 PetriNetUnfolderBase]: For 270761/270763 co-relation queries the response was YES. [2024-06-20 17:17:26,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33796 conditions, 3891 events. 2485/3891 cut-off events. For 270761/270763 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 21173 event pairs, 508 based on Foata normal form. 12/3901 useless extension candidates. Maximal degree in co-relation 33681. Up to 3702 conditions per place. [2024-06-20 17:17:26,415 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 321 selfloop transitions, 22 changer transitions 0/347 dead transitions. [2024-06-20 17:17:26,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 347 transitions, 5221 flow [2024-06-20 17:17:26,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:17:26,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:17:26,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 122 transitions. [2024-06-20 17:17:26,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3719512195121951 [2024-06-20 17:17:26,417 INFO L175 Difference]: Start difference. First operand has 241 places, 322 transitions, 4377 flow. Second operand 8 states and 122 transitions. [2024-06-20 17:17:26,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 347 transitions, 5221 flow [2024-06-20 17:17:26,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 347 transitions, 5156 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-20 17:17:26,830 INFO L231 Difference]: Finished difference. Result has 244 places, 323 transitions, 4378 flow [2024-06-20 17:17:26,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4312, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4378, PETRI_PLACES=244, PETRI_TRANSITIONS=323} [2024-06-20 17:17:26,831 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 202 predicate places. [2024-06-20 17:17:26,831 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 323 transitions, 4378 flow [2024-06-20 17:17:26,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:17:26,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:17:26,832 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:17:26,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-20 17:17:26,832 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:17:26,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:17:26,832 INFO L85 PathProgramCache]: Analyzing trace with hash -327165117, now seen corresponding path program 4 times [2024-06-20 17:17:26,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:17:26,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329329155] [2024-06-20 17:17:26,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:17:26,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:17:26,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:17:30,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:17:30,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:17:30,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329329155] [2024-06-20 17:17:30,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329329155] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:17:30,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:17:30,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:17:30,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901790870] [2024-06-20 17:17:30,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:17:30,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:17:30,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:17:30,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:17:30,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:17:30,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:17:30,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 323 transitions, 4378 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:17:30,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:17:30,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:17:30,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:17:31,296 INFO L124 PetriNetUnfolderBase]: 2487/3897 cut-off events. [2024-06-20 17:17:31,296 INFO L125 PetriNetUnfolderBase]: For 265247/265249 co-relation queries the response was YES. [2024-06-20 17:17:31,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33801 conditions, 3897 events. 2487/3897 cut-off events. For 265247/265249 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 21237 event pairs, 492 based on Foata normal form. 8/3903 useless extension candidates. Maximal degree in co-relation 33684. Up to 3670 conditions per place. [2024-06-20 17:17:31,337 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 327 selfloop transitions, 25 changer transitions 0/356 dead transitions. [2024-06-20 17:17:31,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 356 transitions, 5320 flow [2024-06-20 17:17:31,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:17:31,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:17:31,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 137 transitions. [2024-06-20 17:17:31,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3712737127371274 [2024-06-20 17:17:31,339 INFO L175 Difference]: Start difference. First operand has 244 places, 323 transitions, 4378 flow. Second operand 9 states and 137 transitions. [2024-06-20 17:17:31,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 356 transitions, 5320 flow [2024-06-20 17:17:31,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 356 transitions, 5282 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-20 17:17:31,744 INFO L231 Difference]: Finished difference. Result has 249 places, 326 transitions, 4451 flow [2024-06-20 17:17:31,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4340, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4451, PETRI_PLACES=249, PETRI_TRANSITIONS=326} [2024-06-20 17:17:31,744 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 207 predicate places. [2024-06-20 17:17:31,745 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 326 transitions, 4451 flow [2024-06-20 17:17:31,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:17:31,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:17:31,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:17:31,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-20 17:17:31,745 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:17:31,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:17:31,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1042388131, now seen corresponding path program 2 times [2024-06-20 17:17:31,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:17:31,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514505474] [2024-06-20 17:17:31,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:17:31,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:17:31,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:17:34,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:17:34,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:17:34,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514505474] [2024-06-20 17:17:34,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514505474] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:17:34,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:17:34,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:17:34,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002103693] [2024-06-20 17:17:34,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:17:34,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:17:34,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:17:34,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:17:34,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:17:34,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:17:34,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 326 transitions, 4451 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:17:34,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:17:34,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:17:34,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:17:35,845 INFO L124 PetriNetUnfolderBase]: 2495/3909 cut-off events. [2024-06-20 17:17:35,846 INFO L125 PetriNetUnfolderBase]: For 265281/265283 co-relation queries the response was YES. [2024-06-20 17:17:35,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34132 conditions, 3909 events. 2495/3909 cut-off events. For 265281/265283 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 21287 event pairs, 502 based on Foata normal form. 2/3909 useless extension candidates. Maximal degree in co-relation 34013. Up to 3789 conditions per place. [2024-06-20 17:17:35,886 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 317 selfloop transitions, 22 changer transitions 0/343 dead transitions. [2024-06-20 17:17:35,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 343 transitions, 5220 flow [2024-06-20 17:17:35,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:17:35,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:17:35,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 113 transitions. [2024-06-20 17:17:35,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3445121951219512 [2024-06-20 17:17:35,887 INFO L175 Difference]: Start difference. First operand has 249 places, 326 transitions, 4451 flow. Second operand 8 states and 113 transitions. [2024-06-20 17:17:35,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 343 transitions, 5220 flow [2024-06-20 17:17:36,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 343 transitions, 5182 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-20 17:17:36,269 INFO L231 Difference]: Finished difference. Result has 252 places, 328 transitions, 4515 flow [2024-06-20 17:17:36,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4413, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4515, PETRI_PLACES=252, PETRI_TRANSITIONS=328} [2024-06-20 17:17:36,270 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 210 predicate places. [2024-06-20 17:17:36,270 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 328 transitions, 4515 flow [2024-06-20 17:17:36,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:17:36,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:17:36,270 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:17:36,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-20 17:17:36,270 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:17:36,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:17:36,271 INFO L85 PathProgramCache]: Analyzing trace with hash -1186113, now seen corresponding path program 3 times [2024-06-20 17:17:36,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:17:36,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088536000] [2024-06-20 17:17:36,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:17:36,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:17:36,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:17:39,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:17:39,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:17:39,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088536000] [2024-06-20 17:17:39,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088536000] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:17:39,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:17:39,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:17:39,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602304315] [2024-06-20 17:17:39,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:17:39,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:17:39,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:17:39,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:17:39,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:17:39,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:17:39,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 328 transitions, 4515 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:17:39,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:17:39,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:17:39,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:17:40,402 INFO L124 PetriNetUnfolderBase]: 2490/3902 cut-off events. [2024-06-20 17:17:40,402 INFO L125 PetriNetUnfolderBase]: For 268314/268316 co-relation queries the response was YES. [2024-06-20 17:17:40,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34163 conditions, 3902 events. 2490/3902 cut-off events. For 268314/268316 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 21255 event pairs, 503 based on Foata normal form. 2/3902 useless extension candidates. Maximal degree in co-relation 34042. Up to 3785 conditions per place. [2024-06-20 17:17:40,447 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 324 selfloop transitions, 17 changer transitions 0/345 dead transitions. [2024-06-20 17:17:40,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 345 transitions, 5284 flow [2024-06-20 17:17:40,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:17:40,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:17:40,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 112 transitions. [2024-06-20 17:17:40,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34146341463414637 [2024-06-20 17:17:40,448 INFO L175 Difference]: Start difference. First operand has 252 places, 328 transitions, 4515 flow. Second operand 8 states and 112 transitions. [2024-06-20 17:17:40,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 345 transitions, 5284 flow [2024-06-20 17:17:40,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 345 transitions, 5200 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-20 17:17:40,953 INFO L231 Difference]: Finished difference. Result has 254 places, 330 transitions, 4523 flow [2024-06-20 17:17:40,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4431, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4523, PETRI_PLACES=254, PETRI_TRANSITIONS=330} [2024-06-20 17:17:40,953 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 212 predicate places. [2024-06-20 17:17:40,953 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 330 transitions, 4523 flow [2024-06-20 17:17:40,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:17:40,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:17:40,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:17:40,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-20 17:17:40,954 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:17:40,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:17:40,954 INFO L85 PathProgramCache]: Analyzing trace with hash 138235099, now seen corresponding path program 5 times [2024-06-20 17:17:40,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:17:40,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932382318] [2024-06-20 17:17:40,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:17:40,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:17:40,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:17:43,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:17:43,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:17:43,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932382318] [2024-06-20 17:17:43,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932382318] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:17:43,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:17:43,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:17:43,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191401045] [2024-06-20 17:17:43,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:17:43,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:17:43,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:17:43,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:17:43,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:17:43,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:17:43,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 330 transitions, 4523 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:17:43,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:17:43,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:17:43,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:17:45,209 INFO L124 PetriNetUnfolderBase]: 2606/4075 cut-off events. [2024-06-20 17:17:45,209 INFO L125 PetriNetUnfolderBase]: For 312125/312127 co-relation queries the response was YES. [2024-06-20 17:17:45,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36570 conditions, 4075 events. 2606/4075 cut-off events. For 312125/312127 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 22333 event pairs, 457 based on Foata normal form. 8/4081 useless extension candidates. Maximal degree in co-relation 36448. Up to 3478 conditions per place. [2024-06-20 17:17:45,257 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 269 selfloop transitions, 111 changer transitions 0/384 dead transitions. [2024-06-20 17:17:45,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 384 transitions, 6073 flow [2024-06-20 17:17:45,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:17:45,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:17:45,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 158 transitions. [2024-06-20 17:17:45,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3853658536585366 [2024-06-20 17:17:45,258 INFO L175 Difference]: Start difference. First operand has 254 places, 330 transitions, 4523 flow. Second operand 10 states and 158 transitions. [2024-06-20 17:17:45,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 384 transitions, 6073 flow [2024-06-20 17:17:45,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 384 transitions, 6000 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-20 17:17:45,770 INFO L231 Difference]: Finished difference. Result has 260 places, 350 transitions, 5160 flow [2024-06-20 17:17:45,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4450, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5160, PETRI_PLACES=260, PETRI_TRANSITIONS=350} [2024-06-20 17:17:45,770 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 218 predicate places. [2024-06-20 17:17:45,770 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 350 transitions, 5160 flow [2024-06-20 17:17:45,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:17:45,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:17:45,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:17:45,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-20 17:17:45,771 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:17:45,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:17:45,771 INFO L85 PathProgramCache]: Analyzing trace with hash 138238819, now seen corresponding path program 6 times [2024-06-20 17:17:45,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:17:45,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449129725] [2024-06-20 17:17:45,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:17:45,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:17:45,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:17:48,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:17:48,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:17:48,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449129725] [2024-06-20 17:17:48,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449129725] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:17:48,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:17:48,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:17:48,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358013701] [2024-06-20 17:17:48,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:17:48,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:17:48,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:17:48,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:17:48,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:17:48,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:17:48,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 350 transitions, 5160 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:17:48,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:17:48,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:17:48,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:17:50,136 INFO L124 PetriNetUnfolderBase]: 2662/4162 cut-off events. [2024-06-20 17:17:50,136 INFO L125 PetriNetUnfolderBase]: For 340259/340261 co-relation queries the response was YES. [2024-06-20 17:17:50,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38396 conditions, 4162 events. 2662/4162 cut-off events. For 340259/340261 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 22843 event pairs, 530 based on Foata normal form. 18/4178 useless extension candidates. Maximal degree in co-relation 38271. Up to 3944 conditions per place. [2024-06-20 17:17:50,191 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 339 selfloop transitions, 36 changer transitions 0/379 dead transitions. [2024-06-20 17:17:50,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 379 transitions, 6158 flow [2024-06-20 17:17:50,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:17:50,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:17:50,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 144 transitions. [2024-06-20 17:17:50,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35121951219512193 [2024-06-20 17:17:50,193 INFO L175 Difference]: Start difference. First operand has 260 places, 350 transitions, 5160 flow. Second operand 10 states and 144 transitions. [2024-06-20 17:17:50,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 379 transitions, 6158 flow [2024-06-20 17:17:50,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 379 transitions, 6070 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-20 17:17:50,907 INFO L231 Difference]: Finished difference. Result has 266 places, 355 transitions, 5257 flow [2024-06-20 17:17:50,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5079, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5257, PETRI_PLACES=266, PETRI_TRANSITIONS=355} [2024-06-20 17:17:50,908 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 224 predicate places. [2024-06-20 17:17:50,908 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 355 transitions, 5257 flow [2024-06-20 17:17:50,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:17:50,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:17:50,908 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:17:50,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-20 17:17:50,908 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:17:50,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:17:50,909 INFO L85 PathProgramCache]: Analyzing trace with hash 337684759, now seen corresponding path program 7 times [2024-06-20 17:17:50,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:17:50,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926599483] [2024-06-20 17:17:50,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:17:50,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:17:50,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:17:53,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:17:53,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:17:53,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926599483] [2024-06-20 17:17:53,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926599483] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:17:53,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:17:53,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:17:53,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193448384] [2024-06-20 17:17:53,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:17:53,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:17:53,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:17:53,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:17:53,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:17:53,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:17:53,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 355 transitions, 5257 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:17:53,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:17:53,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:17:53,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:17:55,032 INFO L124 PetriNetUnfolderBase]: 2639/4129 cut-off events. [2024-06-20 17:17:55,032 INFO L125 PetriNetUnfolderBase]: For 315448/315450 co-relation queries the response was YES. [2024-06-20 17:17:55,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37702 conditions, 4129 events. 2639/4129 cut-off events. For 315448/315450 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 22675 event pairs, 523 based on Foata normal form. 10/4137 useless extension candidates. Maximal degree in co-relation 37574. Up to 3960 conditions per place. [2024-06-20 17:17:55,083 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 346 selfloop transitions, 28 changer transitions 0/378 dead transitions. [2024-06-20 17:17:55,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 378 transitions, 6144 flow [2024-06-20 17:17:55,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:17:55,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:17:55,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 138 transitions. [2024-06-20 17:17:55,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33658536585365856 [2024-06-20 17:17:55,085 INFO L175 Difference]: Start difference. First operand has 266 places, 355 transitions, 5257 flow. Second operand 10 states and 138 transitions. [2024-06-20 17:17:55,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 378 transitions, 6144 flow [2024-06-20 17:17:55,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 378 transitions, 6043 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-20 17:17:55,753 INFO L231 Difference]: Finished difference. Result has 269 places, 356 transitions, 5241 flow [2024-06-20 17:17:55,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5160, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5241, PETRI_PLACES=269, PETRI_TRANSITIONS=356} [2024-06-20 17:17:55,754 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 227 predicate places. [2024-06-20 17:17:55,754 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 356 transitions, 5241 flow [2024-06-20 17:17:55,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:17:55,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:17:55,755 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:17:55,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-20 17:17:55,755 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:17:55,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:17:55,755 INFO L85 PathProgramCache]: Analyzing trace with hash -823213180, now seen corresponding path program 1 times [2024-06-20 17:17:55,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:17:55,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108120686] [2024-06-20 17:17:55,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:17:55,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:17:55,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:17:59,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:17:59,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:17:59,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108120686] [2024-06-20 17:17:59,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108120686] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:17:59,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:17:59,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:17:59,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118677793] [2024-06-20 17:17:59,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:17:59,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:17:59,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:17:59,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:17:59,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:17:59,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:17:59,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 356 transitions, 5241 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:17:59,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:17:59,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:17:59,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:18:00,587 INFO L124 PetriNetUnfolderBase]: 2667/4172 cut-off events. [2024-06-20 17:18:00,588 INFO L125 PetriNetUnfolderBase]: For 322274/322276 co-relation queries the response was YES. [2024-06-20 17:18:00,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38016 conditions, 4172 events. 2667/4172 cut-off events. For 322274/322276 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 22908 event pairs, 394 based on Foata normal form. 8/4173 useless extension candidates. Maximal degree in co-relation 37886. Up to 3750 conditions per place. [2024-06-20 17:18:00,641 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 337 selfloop transitions, 46 changer transitions 0/387 dead transitions. [2024-06-20 17:18:00,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 387 transitions, 6391 flow [2024-06-20 17:18:00,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:18:00,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:18:00,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-20 17:18:00,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39939024390243905 [2024-06-20 17:18:00,642 INFO L175 Difference]: Start difference. First operand has 269 places, 356 transitions, 5241 flow. Second operand 8 states and 131 transitions. [2024-06-20 17:18:00,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 387 transitions, 6391 flow [2024-06-20 17:18:01,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 387 transitions, 6338 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-20 17:18:01,302 INFO L231 Difference]: Finished difference. Result has 269 places, 357 transitions, 5314 flow [2024-06-20 17:18:01,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5188, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5314, PETRI_PLACES=269, PETRI_TRANSITIONS=357} [2024-06-20 17:18:01,302 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 227 predicate places. [2024-06-20 17:18:01,302 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 357 transitions, 5314 flow [2024-06-20 17:18:01,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:18:01,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:18:01,303 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:18:01,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-20 17:18:01,303 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:18:01,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:18:01,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1033050368, now seen corresponding path program 2 times [2024-06-20 17:18:01,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:18:01,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558904486] [2024-06-20 17:18:01,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:18:01,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:18:01,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:18:04,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:18:04,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:18:04,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558904486] [2024-06-20 17:18:04,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558904486] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:18:04,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:18:04,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:18:04,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330403753] [2024-06-20 17:18:04,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:18:04,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:18:04,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:18:04,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:18:04,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:18:04,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:18:04,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 357 transitions, 5314 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:18:04,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:18:04,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:18:04,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:18:06,656 INFO L124 PetriNetUnfolderBase]: 2649/4142 cut-off events. [2024-06-20 17:18:06,656 INFO L125 PetriNetUnfolderBase]: For 312707/312709 co-relation queries the response was YES. [2024-06-20 17:18:06,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37562 conditions, 4142 events. 2649/4142 cut-off events. For 312707/312709 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 22714 event pairs, 496 based on Foata normal form. 8/4143 useless extension candidates. Maximal degree in co-relation 37431. Up to 3828 conditions per place. [2024-06-20 17:18:06,708 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 330 selfloop transitions, 47 changer transitions 0/381 dead transitions. [2024-06-20 17:18:06,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 381 transitions, 6280 flow [2024-06-20 17:18:06,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:18:06,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:18:06,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-20 17:18:06,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38414634146341464 [2024-06-20 17:18:06,709 INFO L175 Difference]: Start difference. First operand has 269 places, 357 transitions, 5314 flow. Second operand 8 states and 126 transitions. [2024-06-20 17:18:06,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 381 transitions, 6280 flow [2024-06-20 17:18:07,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 381 transitions, 6107 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-20 17:18:07,351 INFO L231 Difference]: Finished difference. Result has 271 places, 357 transitions, 5239 flow [2024-06-20 17:18:07,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5141, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5239, PETRI_PLACES=271, PETRI_TRANSITIONS=357} [2024-06-20 17:18:07,352 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 229 predicate places. [2024-06-20 17:18:07,352 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 357 transitions, 5239 flow [2024-06-20 17:18:07,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:18:07,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:18:07,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:18:07,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-20 17:18:07,353 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:18:07,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:18:07,353 INFO L85 PathProgramCache]: Analyzing trace with hash -1244972335, now seen corresponding path program 1 times [2024-06-20 17:18:07,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:18:07,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355797104] [2024-06-20 17:18:07,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:18:07,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:18:07,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:18:10,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:18:10,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:18:10,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355797104] [2024-06-20 17:18:10,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355797104] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:18:10,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:18:10,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:18:10,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212227138] [2024-06-20 17:18:10,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:18:10,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:18:10,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:18:10,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:18:10,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:18:10,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:18:10,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 357 transitions, 5239 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:18:10,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:18:10,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:18:10,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:18:11,721 INFO L124 PetriNetUnfolderBase]: 2674/4185 cut-off events. [2024-06-20 17:18:11,721 INFO L125 PetriNetUnfolderBase]: For 308023/308025 co-relation queries the response was YES. [2024-06-20 17:18:11,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37533 conditions, 4185 events. 2674/4185 cut-off events. For 308023/308025 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 22991 event pairs, 526 based on Foata normal form. 1/4179 useless extension candidates. Maximal degree in co-relation 37402. Up to 3870 conditions per place. [2024-06-20 17:18:11,770 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 317 selfloop transitions, 72 changer transitions 0/393 dead transitions. [2024-06-20 17:18:11,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 393 transitions, 6346 flow [2024-06-20 17:18:11,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:18:11,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:18:11,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-20 17:18:11,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39939024390243905 [2024-06-20 17:18:11,772 INFO L175 Difference]: Start difference. First operand has 271 places, 357 transitions, 5239 flow. Second operand 8 states and 131 transitions. [2024-06-20 17:18:11,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 393 transitions, 6346 flow [2024-06-20 17:18:12,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 393 transitions, 6210 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-20 17:18:12,418 INFO L231 Difference]: Finished difference. Result has 275 places, 372 transitions, 5634 flow [2024-06-20 17:18:12,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5117, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5634, PETRI_PLACES=275, PETRI_TRANSITIONS=372} [2024-06-20 17:18:12,419 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 233 predicate places. [2024-06-20 17:18:12,419 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 372 transitions, 5634 flow [2024-06-20 17:18:12,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:18:12,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:18:12,420 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:18:12,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-20 17:18:12,420 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:18:12,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:18:12,420 INFO L85 PathProgramCache]: Analyzing trace with hash 936713442, now seen corresponding path program 1 times [2024-06-20 17:18:12,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:18:12,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73850263] [2024-06-20 17:18:12,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:18:12,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:18:12,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:18:16,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:18:16,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:18:16,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73850263] [2024-06-20 17:18:16,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73850263] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:18:16,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:18:16,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:18:16,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355914949] [2024-06-20 17:18:16,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:18:16,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:18:16,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:18:16,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:18:16,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:18:16,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:18:16,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 372 transitions, 5634 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:18:16,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:18:16,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:18:16,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:18:18,133 INFO L124 PetriNetUnfolderBase]: 2684/4201 cut-off events. [2024-06-20 17:18:18,133 INFO L125 PetriNetUnfolderBase]: For 321220/321222 co-relation queries the response was YES. [2024-06-20 17:18:18,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38287 conditions, 4201 events. 2684/4201 cut-off events. For 321220/321222 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 23136 event pairs, 515 based on Foata normal form. 2/4196 useless extension candidates. Maximal degree in co-relation 38152. Up to 3950 conditions per place. [2024-06-20 17:18:18,187 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 343 selfloop transitions, 45 changer transitions 0/392 dead transitions. [2024-06-20 17:18:18,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 392 transitions, 6570 flow [2024-06-20 17:18:18,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:18:18,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:18:18,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-20 17:18:18,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39372822299651566 [2024-06-20 17:18:18,189 INFO L175 Difference]: Start difference. First operand has 275 places, 372 transitions, 5634 flow. Second operand 7 states and 113 transitions. [2024-06-20 17:18:18,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 392 transitions, 6570 flow [2024-06-20 17:18:18,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 392 transitions, 6416 flow, removed 39 selfloop flow, removed 4 redundant places. [2024-06-20 17:18:18,933 INFO L231 Difference]: Finished difference. Result has 278 places, 375 transitions, 5697 flow [2024-06-20 17:18:18,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5480, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5697, PETRI_PLACES=278, PETRI_TRANSITIONS=375} [2024-06-20 17:18:18,934 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 236 predicate places. [2024-06-20 17:18:18,934 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 375 transitions, 5697 flow [2024-06-20 17:18:18,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:18:18,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:18:18,934 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:18:18,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-20 17:18:18,934 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:18:18,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:18:18,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1069516203, now seen corresponding path program 2 times [2024-06-20 17:18:18,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:18:18,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55904374] [2024-06-20 17:18:18,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:18:18,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:18:18,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:18:23,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:18:23,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:18:23,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55904374] [2024-06-20 17:18:23,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55904374] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:18:23,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:18:23,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:18:23,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920622651] [2024-06-20 17:18:23,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:18:23,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:18:23,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:18:23,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:18:23,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:18:23,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:18:23,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 375 transitions, 5697 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:18:23,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:18:23,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:18:23,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:18:24,667 INFO L124 PetriNetUnfolderBase]: 2689/4206 cut-off events. [2024-06-20 17:18:24,667 INFO L125 PetriNetUnfolderBase]: For 329719/329721 co-relation queries the response was YES. [2024-06-20 17:18:24,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38674 conditions, 4206 events. 2689/4206 cut-off events. For 329719/329721 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 23122 event pairs, 519 based on Foata normal form. 1/4200 useless extension candidates. Maximal degree in co-relation 38539. Up to 3930 conditions per place. [2024-06-20 17:18:24,716 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 336 selfloop transitions, 54 changer transitions 0/394 dead transitions. [2024-06-20 17:18:24,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 394 transitions, 6591 flow [2024-06-20 17:18:24,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:18:24,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:18:24,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-20 17:18:24,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-20 17:18:24,717 INFO L175 Difference]: Start difference. First operand has 278 places, 375 transitions, 5697 flow. Second operand 7 states and 112 transitions. [2024-06-20 17:18:24,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 394 transitions, 6591 flow [2024-06-20 17:18:25,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 394 transitions, 6448 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-20 17:18:25,486 INFO L231 Difference]: Finished difference. Result has 281 places, 378 transitions, 5754 flow [2024-06-20 17:18:25,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5554, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5754, PETRI_PLACES=281, PETRI_TRANSITIONS=378} [2024-06-20 17:18:25,487 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 239 predicate places. [2024-06-20 17:18:25,487 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 378 transitions, 5754 flow [2024-06-20 17:18:25,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:18:25,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:18:25,487 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:18:25,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-20 17:18:25,488 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:18:25,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:18:25,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1745692109, now seen corresponding path program 3 times [2024-06-20 17:18:25,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:18:25,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263721207] [2024-06-20 17:18:25,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:18:25,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:18:25,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:18:28,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:18:28,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:18:28,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263721207] [2024-06-20 17:18:28,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263721207] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:18:28,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:18:28,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:18:28,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556769814] [2024-06-20 17:18:28,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:18:28,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:18:28,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:18:28,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:18:28,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:18:28,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:18:28,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 378 transitions, 5754 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:18:28,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:18:28,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:18:28,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:18:30,303 INFO L124 PetriNetUnfolderBase]: 2702/4237 cut-off events. [2024-06-20 17:18:30,303 INFO L125 PetriNetUnfolderBase]: For 340534/340544 co-relation queries the response was YES. [2024-06-20 17:18:30,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39094 conditions, 4237 events. 2702/4237 cut-off events. For 340534/340544 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 23429 event pairs, 504 based on Foata normal form. 9/4242 useless extension candidates. Maximal degree in co-relation 38958. Up to 3960 conditions per place. [2024-06-20 17:18:30,357 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 365 selfloop transitions, 43 changer transitions 0/412 dead transitions. [2024-06-20 17:18:30,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 412 transitions, 6994 flow [2024-06-20 17:18:30,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:18:30,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:18:30,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-20 17:18:30,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39939024390243905 [2024-06-20 17:18:30,359 INFO L175 Difference]: Start difference. First operand has 281 places, 378 transitions, 5754 flow. Second operand 8 states and 131 transitions. [2024-06-20 17:18:30,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 412 transitions, 6994 flow [2024-06-20 17:18:31,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 412 transitions, 6852 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-20 17:18:31,218 INFO L231 Difference]: Finished difference. Result has 284 places, 384 transitions, 5914 flow [2024-06-20 17:18:31,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5612, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5914, PETRI_PLACES=284, PETRI_TRANSITIONS=384} [2024-06-20 17:18:31,222 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 242 predicate places. [2024-06-20 17:18:31,222 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 384 transitions, 5914 flow [2024-06-20 17:18:31,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:18:31,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:18:31,222 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:18:31,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-20 17:18:31,223 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:18:31,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:18:31,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1745422998, now seen corresponding path program 1 times [2024-06-20 17:18:31,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:18:31,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347694815] [2024-06-20 17:18:31,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:18:31,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:18:31,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:18:33,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:18:33,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:18:33,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347694815] [2024-06-20 17:18:33,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347694815] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:18:33,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:18:33,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:18:33,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791217871] [2024-06-20 17:18:33,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:18:33,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:18:33,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:18:33,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:18:33,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:18:33,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:18:33,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 384 transitions, 5914 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:18:33,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:18:33,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:18:33,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:18:35,410 INFO L124 PetriNetUnfolderBase]: 2751/4312 cut-off events. [2024-06-20 17:18:35,410 INFO L125 PetriNetUnfolderBase]: For 359753/359763 co-relation queries the response was YES. [2024-06-20 17:18:35,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40315 conditions, 4312 events. 2751/4312 cut-off events. For 359753/359763 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 23870 event pairs, 505 based on Foata normal form. 10/4318 useless extension candidates. Maximal degree in co-relation 40178. Up to 3979 conditions per place. [2024-06-20 17:18:35,461 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 350 selfloop transitions, 93 changer transitions 0/447 dead transitions. [2024-06-20 17:18:35,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 447 transitions, 7807 flow [2024-06-20 17:18:35,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:18:35,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:18:35,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-20 17:18:35,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3983739837398374 [2024-06-20 17:18:35,463 INFO L175 Difference]: Start difference. First operand has 284 places, 384 transitions, 5914 flow. Second operand 9 states and 147 transitions. [2024-06-20 17:18:35,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 447 transitions, 7807 flow [2024-06-20 17:18:36,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 447 transitions, 7652 flow, removed 65 selfloop flow, removed 3 redundant places. [2024-06-20 17:18:36,325 INFO L231 Difference]: Finished difference. Result has 294 places, 416 transitions, 6721 flow [2024-06-20 17:18:36,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5759, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6721, PETRI_PLACES=294, PETRI_TRANSITIONS=416} [2024-06-20 17:18:36,325 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 252 predicate places. [2024-06-20 17:18:36,326 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 416 transitions, 6721 flow [2024-06-20 17:18:36,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:18:36,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:18:36,326 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:18:36,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-20 17:18:36,326 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:18:36,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:18:36,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1745423339, now seen corresponding path program 4 times [2024-06-20 17:18:36,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:18:36,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289656634] [2024-06-20 17:18:36,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:18:36,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:18:36,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:18:40,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:18:40,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:18:40,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289656634] [2024-06-20 17:18:40,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289656634] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:18:40,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:18:40,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:18:40,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271129561] [2024-06-20 17:18:40,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:18:40,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:18:40,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:18:40,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:18:40,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:18:40,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:18:40,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 416 transitions, 6721 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:18:40,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:18:40,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:18:40,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:18:42,253 INFO L124 PetriNetUnfolderBase]: 2748/4297 cut-off events. [2024-06-20 17:18:42,254 INFO L125 PetriNetUnfolderBase]: For 366818/366820 co-relation queries the response was YES. [2024-06-20 17:18:42,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41077 conditions, 4297 events. 2748/4297 cut-off events. For 366818/366820 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 23745 event pairs, 536 based on Foata normal form. 1/4291 useless extension candidates. Maximal degree in co-relation 40934. Up to 3867 conditions per place. [2024-06-20 17:18:42,304 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 325 selfloop transitions, 112 changer transitions 0/441 dead transitions. [2024-06-20 17:18:42,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 441 transitions, 7905 flow [2024-06-20 17:18:42,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:18:42,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:18:42,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-20 17:18:42,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39939024390243905 [2024-06-20 17:18:42,306 INFO L175 Difference]: Start difference. First operand has 294 places, 416 transitions, 6721 flow. Second operand 8 states and 131 transitions. [2024-06-20 17:18:42,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 441 transitions, 7905 flow [2024-06-20 17:18:43,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 441 transitions, 7725 flow, removed 83 selfloop flow, removed 2 redundant places. [2024-06-20 17:18:43,242 INFO L231 Difference]: Finished difference. Result has 301 places, 419 transitions, 6933 flow [2024-06-20 17:18:43,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6541, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6933, PETRI_PLACES=301, PETRI_TRANSITIONS=419} [2024-06-20 17:18:43,243 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 259 predicate places. [2024-06-20 17:18:43,243 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 419 transitions, 6933 flow [2024-06-20 17:18:43,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:18:43,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:18:43,243 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:18:43,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-20 17:18:43,244 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:18:43,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:18:43,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1998586808, now seen corresponding path program 2 times [2024-06-20 17:18:43,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:18:43,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408561315] [2024-06-20 17:18:43,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:18:43,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:18:43,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:18:46,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:18:46,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:18:46,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408561315] [2024-06-20 17:18:46,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408561315] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:18:46,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:18:46,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:18:46,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885344640] [2024-06-20 17:18:46,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:18:46,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:18:46,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:18:46,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:18:46,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:18:46,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:18:46,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 419 transitions, 6933 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:18:46,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:18:46,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:18:46,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:18:48,203 INFO L124 PetriNetUnfolderBase]: 2778/4344 cut-off events. [2024-06-20 17:18:48,203 INFO L125 PetriNetUnfolderBase]: For 387793/387803 co-relation queries the response was YES. [2024-06-20 17:18:48,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42144 conditions, 4344 events. 2778/4344 cut-off events. For 387793/387803 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 24014 event pairs, 508 based on Foata normal form. 12/4352 useless extension candidates. Maximal degree in co-relation 41998. Up to 4099 conditions per place. [2024-06-20 17:18:48,259 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 397 selfloop transitions, 48 changer transitions 0/449 dead transitions. [2024-06-20 17:18:48,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 449 transitions, 8088 flow [2024-06-20 17:18:48,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:18:48,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:18:48,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 139 transitions. [2024-06-20 17:18:48,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37669376693766937 [2024-06-20 17:18:48,261 INFO L175 Difference]: Start difference. First operand has 301 places, 419 transitions, 6933 flow. Second operand 9 states and 139 transitions. [2024-06-20 17:18:48,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 449 transitions, 8088 flow [2024-06-20 17:18:49,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 449 transitions, 7889 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-20 17:18:49,108 INFO L231 Difference]: Finished difference. Result has 306 places, 427 transitions, 7056 flow [2024-06-20 17:18:49,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6734, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7056, PETRI_PLACES=306, PETRI_TRANSITIONS=427} [2024-06-20 17:18:49,109 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 264 predicate places. [2024-06-20 17:18:49,109 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 427 transitions, 7056 flow [2024-06-20 17:18:49,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:18:49,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:18:49,109 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:18:49,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-20 17:18:49,109 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:18:49,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:18:49,110 INFO L85 PathProgramCache]: Analyzing trace with hash -798335506, now seen corresponding path program 2 times [2024-06-20 17:18:49,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:18:49,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061765915] [2024-06-20 17:18:49,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:18:49,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:18:49,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:18:52,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:18:52,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:18:52,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061765915] [2024-06-20 17:18:52,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061765915] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:18:52,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:18:52,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:18:52,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207734193] [2024-06-20 17:18:52,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:18:52,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:18:52,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:18:52,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:18:52,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:18:52,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:18:52,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 427 transitions, 7056 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:18:52,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:18:52,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:18:52,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:18:53,853 INFO L124 PetriNetUnfolderBase]: 2848/4449 cut-off events. [2024-06-20 17:18:53,853 INFO L125 PetriNetUnfolderBase]: For 421547/421557 co-relation queries the response was YES. [2024-06-20 17:18:53,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44351 conditions, 4449 events. 2848/4449 cut-off events. For 421547/421557 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 24651 event pairs, 512 based on Foata normal form. 12/4457 useless extension candidates. Maximal degree in co-relation 44203. Up to 4139 conditions per place. [2024-06-20 17:18:53,915 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 406 selfloop transitions, 55 changer transitions 0/465 dead transitions. [2024-06-20 17:18:53,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 465 transitions, 8752 flow [2024-06-20 17:18:53,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:18:53,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:18:53,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-20 17:18:53,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3932926829268293 [2024-06-20 17:18:53,916 INFO L175 Difference]: Start difference. First operand has 306 places, 427 transitions, 7056 flow. Second operand 8 states and 129 transitions. [2024-06-20 17:18:53,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 465 transitions, 8752 flow [2024-06-20 17:18:55,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 465 transitions, 8545 flow, removed 63 selfloop flow, removed 8 redundant places. [2024-06-20 17:18:55,087 INFO L231 Difference]: Finished difference. Result has 307 places, 440 transitions, 7375 flow [2024-06-20 17:18:55,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6857, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7375, PETRI_PLACES=307, PETRI_TRANSITIONS=440} [2024-06-20 17:18:55,087 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 265 predicate places. [2024-06-20 17:18:55,087 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 440 transitions, 7375 flow [2024-06-20 17:18:55,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:18:55,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:18:55,088 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:18:55,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-20 17:18:55,088 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:18:55,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:18:55,088 INFO L85 PathProgramCache]: Analyzing trace with hash -908573765, now seen corresponding path program 5 times [2024-06-20 17:18:55,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:18:55,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640337522] [2024-06-20 17:18:55,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:18:55,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:18:55,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:18:58,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:18:58,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:18:58,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640337522] [2024-06-20 17:18:58,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640337522] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:18:58,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:18:58,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:18:58,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477725435] [2024-06-20 17:18:58,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:18:58,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:18:58,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:18:58,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:18:58,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:18:58,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:18:58,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 440 transitions, 7375 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:18:58,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:18:58,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:18:58,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:19:00,520 INFO L124 PetriNetUnfolderBase]: 2842/4432 cut-off events. [2024-06-20 17:19:00,520 INFO L125 PetriNetUnfolderBase]: For 409235/409237 co-relation queries the response was YES. [2024-06-20 17:19:00,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44271 conditions, 4432 events. 2842/4432 cut-off events. For 409235/409237 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 24529 event pairs, 542 based on Foata normal form. 2/4427 useless extension candidates. Maximal degree in co-relation 44123. Up to 4100 conditions per place. [2024-06-20 17:19:00,579 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 370 selfloop transitions, 87 changer transitions 0/461 dead transitions. [2024-06-20 17:19:00,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 461 transitions, 8365 flow [2024-06-20 17:19:00,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:19:00,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:19:00,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-20 17:19:00,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-20 17:19:00,580 INFO L175 Difference]: Start difference. First operand has 307 places, 440 transitions, 7375 flow. Second operand 8 states and 123 transitions. [2024-06-20 17:19:00,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 461 transitions, 8365 flow [2024-06-20 17:19:01,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 461 transitions, 8125 flow, removed 115 selfloop flow, removed 2 redundant places. [2024-06-20 17:19:01,554 INFO L231 Difference]: Finished difference. Result has 314 places, 444 transitions, 7364 flow [2024-06-20 17:19:01,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7135, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7364, PETRI_PLACES=314, PETRI_TRANSITIONS=444} [2024-06-20 17:19:01,554 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 272 predicate places. [2024-06-20 17:19:01,555 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 444 transitions, 7364 flow [2024-06-20 17:19:01,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:01,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:19:01,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:19:01,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-20 17:19:01,555 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:19:01,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:19:01,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1370400066, now seen corresponding path program 3 times [2024-06-20 17:19:01,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:19:01,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797665768] [2024-06-20 17:19:01,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:19:01,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:19:01,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:19:05,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:19:05,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:19:05,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797665768] [2024-06-20 17:19:05,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797665768] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:19:05,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:19:05,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:19:05,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116694095] [2024-06-20 17:19:05,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:19:05,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:19:05,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:19:05,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:19:05,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:19:05,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:19:05,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 444 transitions, 7364 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:05,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:19:05,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:19:05,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:19:07,223 INFO L124 PetriNetUnfolderBase]: 2836/4435 cut-off events. [2024-06-20 17:19:07,224 INFO L125 PetriNetUnfolderBase]: For 407338/407348 co-relation queries the response was YES. [2024-06-20 17:19:07,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43900 conditions, 4435 events. 2836/4435 cut-off events. For 407338/407348 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 24626 event pairs, 513 based on Foata normal form. 10/4441 useless extension candidates. Maximal degree in co-relation 43749. Up to 4206 conditions per place. [2024-06-20 17:19:07,295 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 430 selfloop transitions, 38 changer transitions 0/472 dead transitions. [2024-06-20 17:19:07,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 472 transitions, 8529 flow [2024-06-20 17:19:07,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:19:07,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:19:07,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-20 17:19:07,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38109756097560976 [2024-06-20 17:19:07,297 INFO L175 Difference]: Start difference. First operand has 314 places, 444 transitions, 7364 flow. Second operand 8 states and 125 transitions. [2024-06-20 17:19:07,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 472 transitions, 8529 flow [2024-06-20 17:19:08,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 472 transitions, 8276 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-20 17:19:08,312 INFO L231 Difference]: Finished difference. Result has 317 places, 450 transitions, 7354 flow [2024-06-20 17:19:08,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7112, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7354, PETRI_PLACES=317, PETRI_TRANSITIONS=450} [2024-06-20 17:19:08,312 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 275 predicate places. [2024-06-20 17:19:08,313 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 450 transitions, 7354 flow [2024-06-20 17:19:08,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:08,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:19:08,313 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:19:08,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-20 17:19:08,313 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:19:08,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:19:08,313 INFO L85 PathProgramCache]: Analyzing trace with hash -969886245, now seen corresponding path program 6 times [2024-06-20 17:19:08,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:19:08,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474012015] [2024-06-20 17:19:08,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:19:08,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:19:08,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:19:11,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:19:11,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:19:11,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474012015] [2024-06-20 17:19:11,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474012015] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:19:11,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:19:11,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:19:11,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341711084] [2024-06-20 17:19:11,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:19:11,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:19:11,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:19:11,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:19:11,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:19:11,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:19:11,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 450 transitions, 7354 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:11,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:19:11,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:19:11,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:19:12,644 INFO L124 PetriNetUnfolderBase]: 2833/4420 cut-off events. [2024-06-20 17:19:12,644 INFO L125 PetriNetUnfolderBase]: For 410722/410724 co-relation queries the response was YES. [2024-06-20 17:19:12,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43813 conditions, 4420 events. 2833/4420 cut-off events. For 410722/410724 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 24412 event pairs, 534 based on Foata normal form. 1/4414 useless extension candidates. Maximal degree in co-relation 43660. Up to 4174 conditions per place. [2024-06-20 17:19:12,702 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 390 selfloop transitions, 69 changer transitions 0/463 dead transitions. [2024-06-20 17:19:12,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 463 transitions, 8306 flow [2024-06-20 17:19:12,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:19:12,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:19:12,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 119 transitions. [2024-06-20 17:19:12,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3628048780487805 [2024-06-20 17:19:12,703 INFO L175 Difference]: Start difference. First operand has 317 places, 450 transitions, 7354 flow. Second operand 8 states and 119 transitions. [2024-06-20 17:19:12,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 463 transitions, 8306 flow [2024-06-20 17:19:13,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 463 transitions, 8104 flow, removed 69 selfloop flow, removed 5 redundant places. [2024-06-20 17:19:13,754 INFO L231 Difference]: Finished difference. Result has 320 places, 450 transitions, 7297 flow [2024-06-20 17:19:13,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7152, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7297, PETRI_PLACES=320, PETRI_TRANSITIONS=450} [2024-06-20 17:19:13,754 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 278 predicate places. [2024-06-20 17:19:13,754 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 450 transitions, 7297 flow [2024-06-20 17:19:13,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:13,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:19:13,755 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:19:13,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-20 17:19:13,755 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:19:13,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:19:13,755 INFO L85 PathProgramCache]: Analyzing trace with hash 395682688, now seen corresponding path program 3 times [2024-06-20 17:19:13,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:19:13,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830516526] [2024-06-20 17:19:13,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:19:13,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:19:13,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:19:16,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:19:16,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:19:16,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830516526] [2024-06-20 17:19:16,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830516526] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:19:16,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:19:16,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:19:16,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937371648] [2024-06-20 17:19:16,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:19:16,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:19:16,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:19:16,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:19:16,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:19:16,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:19:16,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 450 transitions, 7297 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:16,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:19:16,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:19:16,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:19:18,331 INFO L124 PetriNetUnfolderBase]: 2863/4463 cut-off events. [2024-06-20 17:19:18,332 INFO L125 PetriNetUnfolderBase]: For 426534/426536 co-relation queries the response was YES. [2024-06-20 17:19:18,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44270 conditions, 4463 events. 2863/4463 cut-off events. For 426534/426536 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 24686 event pairs, 532 based on Foata normal form. 4/4460 useless extension candidates. Maximal degree in co-relation 44116. Up to 4129 conditions per place. [2024-06-20 17:19:18,390 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 369 selfloop transitions, 110 changer transitions 0/483 dead transitions. [2024-06-20 17:19:18,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 483 transitions, 8825 flow [2024-06-20 17:19:18,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:19:18,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:19:18,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-20 17:19:18,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3794037940379404 [2024-06-20 17:19:18,392 INFO L175 Difference]: Start difference. First operand has 320 places, 450 transitions, 7297 flow. Second operand 9 states and 140 transitions. [2024-06-20 17:19:18,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 483 transitions, 8825 flow [2024-06-20 17:19:19,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 483 transitions, 8603 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-20 17:19:19,476 INFO L231 Difference]: Finished difference. Result has 324 places, 464 transitions, 7753 flow [2024-06-20 17:19:19,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7075, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7753, PETRI_PLACES=324, PETRI_TRANSITIONS=464} [2024-06-20 17:19:19,476 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 282 predicate places. [2024-06-20 17:19:19,477 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 464 transitions, 7753 flow [2024-06-20 17:19:19,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:19,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:19:19,477 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:19:19,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-20 17:19:19,477 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:19:19,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:19:19,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1052778792, now seen corresponding path program 1 times [2024-06-20 17:19:19,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:19:19,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338632525] [2024-06-20 17:19:19,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:19:19,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:19:19,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:19:22,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:19:22,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:19:22,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338632525] [2024-06-20 17:19:22,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338632525] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:19:22,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:19:22,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:19:22,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780074230] [2024-06-20 17:19:22,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:19:22,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:19:22,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:19:22,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:19:22,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:19:22,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:19:22,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 464 transitions, 7753 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:22,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:19:22,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:19:22,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:19:24,034 INFO L124 PetriNetUnfolderBase]: 2854/4452 cut-off events. [2024-06-20 17:19:24,034 INFO L125 PetriNetUnfolderBase]: For 430847/430849 co-relation queries the response was YES. [2024-06-20 17:19:24,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44570 conditions, 4452 events. 2854/4452 cut-off events. For 430847/430849 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 24659 event pairs, 527 based on Foata normal form. 3/4448 useless extension candidates. Maximal degree in co-relation 44413. Up to 4170 conditions per place. [2024-06-20 17:19:24,092 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 396 selfloop transitions, 79 changer transitions 0/479 dead transitions. [2024-06-20 17:19:24,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 479 transitions, 8762 flow [2024-06-20 17:19:24,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:19:24,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:19:24,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-20 17:19:24,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3832752613240418 [2024-06-20 17:19:24,094 INFO L175 Difference]: Start difference. First operand has 324 places, 464 transitions, 7753 flow. Second operand 7 states and 110 transitions. [2024-06-20 17:19:24,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 479 transitions, 8762 flow [2024-06-20 17:19:25,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 479 transitions, 8225 flow, removed 198 selfloop flow, removed 6 redundant places. [2024-06-20 17:19:25,261 INFO L231 Difference]: Finished difference. Result has 325 places, 464 transitions, 7412 flow [2024-06-20 17:19:25,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7216, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=385, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7412, PETRI_PLACES=325, PETRI_TRANSITIONS=464} [2024-06-20 17:19:25,261 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 283 predicate places. [2024-06-20 17:19:25,262 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 464 transitions, 7412 flow [2024-06-20 17:19:25,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:25,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:19:25,262 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:19:25,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-20 17:19:25,263 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:19:25,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:19:25,263 INFO L85 PathProgramCache]: Analyzing trace with hash 395678038, now seen corresponding path program 4 times [2024-06-20 17:19:25,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:19:25,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525766069] [2024-06-20 17:19:25,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:19:25,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:19:25,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:19:27,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:19:27,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:19:27,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525766069] [2024-06-20 17:19:27,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525766069] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:19:27,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:19:27,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:19:27,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166943404] [2024-06-20 17:19:27,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:19:27,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:19:27,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:19:27,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:19:27,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:19:27,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:19:27,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 464 transitions, 7412 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:27,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:19:27,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:19:27,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:19:29,731 INFO L124 PetriNetUnfolderBase]: 2890/4500 cut-off events. [2024-06-20 17:19:29,731 INFO L125 PetriNetUnfolderBase]: For 440230/440232 co-relation queries the response was YES. [2024-06-20 17:19:29,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45017 conditions, 4500 events. 2890/4500 cut-off events. For 440230/440232 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 24895 event pairs, 526 based on Foata normal form. 4/4497 useless extension candidates. Maximal degree in co-relation 44860. Up to 4100 conditions per place. [2024-06-20 17:19:29,786 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 349 selfloop transitions, 139 changer transitions 0/492 dead transitions. [2024-06-20 17:19:29,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 492 transitions, 8958 flow [2024-06-20 17:19:29,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:19:29,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:19:29,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-20 17:19:29,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3821138211382114 [2024-06-20 17:19:29,788 INFO L175 Difference]: Start difference. First operand has 325 places, 464 transitions, 7412 flow. Second operand 9 states and 141 transitions. [2024-06-20 17:19:29,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 492 transitions, 8958 flow [2024-06-20 17:19:30,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 492 transitions, 8665 flow, removed 31 selfloop flow, removed 8 redundant places. [2024-06-20 17:19:30,748 INFO L231 Difference]: Finished difference. Result has 327 places, 474 transitions, 7829 flow [2024-06-20 17:19:30,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7123, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7829, PETRI_PLACES=327, PETRI_TRANSITIONS=474} [2024-06-20 17:19:30,749 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 285 predicate places. [2024-06-20 17:19:30,749 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 474 transitions, 7829 flow [2024-06-20 17:19:30,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:30,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:19:30,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:19:30,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-20 17:19:30,749 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:19:30,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:19:30,750 INFO L85 PathProgramCache]: Analyzing trace with hash 395855668, now seen corresponding path program 5 times [2024-06-20 17:19:30,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:19:30,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770779650] [2024-06-20 17:19:30,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:19:30,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:19:30,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:19:33,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:19:33,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:19:33,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770779650] [2024-06-20 17:19:33,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770779650] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:19:33,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:19:33,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:19:33,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479274903] [2024-06-20 17:19:33,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:19:33,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:19:33,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:19:33,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:19:33,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:19:33,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:19:33,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 474 transitions, 7829 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:33,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:19:33,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:19:33,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:19:35,256 INFO L124 PetriNetUnfolderBase]: 2901/4518 cut-off events. [2024-06-20 17:19:35,257 INFO L125 PetriNetUnfolderBase]: For 431090/431092 co-relation queries the response was YES. [2024-06-20 17:19:35,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45407 conditions, 4518 events. 2901/4518 cut-off events. For 431090/431092 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 25044 event pairs, 536 based on Foata normal form. 4/4515 useless extension candidates. Maximal degree in co-relation 45249. Up to 4220 conditions per place. [2024-06-20 17:19:35,322 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 410 selfloop transitions, 90 changer transitions 0/504 dead transitions. [2024-06-20 17:19:35,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 504 transitions, 9189 flow [2024-06-20 17:19:35,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:19:35,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:19:35,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 136 transitions. [2024-06-20 17:19:35,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3685636856368564 [2024-06-20 17:19:35,323 INFO L175 Difference]: Start difference. First operand has 327 places, 474 transitions, 7829 flow. Second operand 9 states and 136 transitions. [2024-06-20 17:19:35,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 504 transitions, 9189 flow [2024-06-20 17:19:36,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 504 transitions, 8791 flow, removed 128 selfloop flow, removed 6 redundant places. [2024-06-20 17:19:36,462 INFO L231 Difference]: Finished difference. Result has 332 places, 487 transitions, 8005 flow [2024-06-20 17:19:36,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7472, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8005, PETRI_PLACES=332, PETRI_TRANSITIONS=487} [2024-06-20 17:19:36,463 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 290 predicate places. [2024-06-20 17:19:36,463 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 487 transitions, 8005 flow [2024-06-20 17:19:36,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:36,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:19:36,463 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:19:36,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-20 17:19:36,463 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:19:36,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:19:36,464 INFO L85 PathProgramCache]: Analyzing trace with hash 437052330, now seen corresponding path program 6 times [2024-06-20 17:19:36,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:19:36,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259485093] [2024-06-20 17:19:36,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:19:36,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:19:36,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:19:39,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:19:39,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:19:39,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259485093] [2024-06-20 17:19:39,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259485093] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:19:39,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:19:39,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:19:39,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301777418] [2024-06-20 17:19:39,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:19:39,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:19:39,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:19:39,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:19:39,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:19:39,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:19:39,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 487 transitions, 8005 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:39,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:19:39,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:19:39,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:19:40,983 INFO L124 PetriNetUnfolderBase]: 2950/4600 cut-off events. [2024-06-20 17:19:40,983 INFO L125 PetriNetUnfolderBase]: For 430061/430071 co-relation queries the response was YES. [2024-06-20 17:19:41,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46264 conditions, 4600 events. 2950/4600 cut-off events. For 430061/430071 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 25570 event pairs, 517 based on Foata normal form. 10/4606 useless extension candidates. Maximal degree in co-relation 46103. Up to 4347 conditions per place. [2024-06-20 17:19:41,048 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 483 selfloop transitions, 50 changer transitions 0/537 dead transitions. [2024-06-20 17:19:41,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 537 transitions, 9763 flow [2024-06-20 17:19:41,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:19:41,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:19:41,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 156 transitions. [2024-06-20 17:19:41,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3804878048780488 [2024-06-20 17:19:41,050 INFO L175 Difference]: Start difference. First operand has 332 places, 487 transitions, 8005 flow. Second operand 10 states and 156 transitions. [2024-06-20 17:19:41,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 537 transitions, 9763 flow [2024-06-20 17:19:42,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 537 transitions, 9536 flow, removed 58 selfloop flow, removed 5 redundant places. [2024-06-20 17:19:42,379 INFO L231 Difference]: Finished difference. Result has 340 places, 504 transitions, 8352 flow [2024-06-20 17:19:42,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7778, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=441, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8352, PETRI_PLACES=340, PETRI_TRANSITIONS=504} [2024-06-20 17:19:42,380 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 298 predicate places. [2024-06-20 17:19:42,380 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 504 transitions, 8352 flow [2024-06-20 17:19:42,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:42,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:19:42,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:19:42,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-20 17:19:42,381 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:19:42,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:19:42,381 INFO L85 PathProgramCache]: Analyzing trace with hash 1258108512, now seen corresponding path program 4 times [2024-06-20 17:19:42,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:19:42,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236426241] [2024-06-20 17:19:42,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:19:42,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:19:42,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:19:45,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:19:45,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:19:45,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236426241] [2024-06-20 17:19:45,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236426241] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:19:45,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:19:45,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:19:45,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53252029] [2024-06-20 17:19:45,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:19:45,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:19:45,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:19:45,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:19:45,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:19:46,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:19:46,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 504 transitions, 8352 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:46,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:19:46,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:19:46,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:19:48,049 INFO L124 PetriNetUnfolderBase]: 2981/4649 cut-off events. [2024-06-20 17:19:48,049 INFO L125 PetriNetUnfolderBase]: For 453466/453476 co-relation queries the response was YES. [2024-06-20 17:19:48,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47441 conditions, 4649 events. 2981/4649 cut-off events. For 453466/453476 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 25960 event pairs, 528 based on Foata normal form. 10/4655 useless extension candidates. Maximal degree in co-relation 47276. Up to 4394 conditions per place. [2024-06-20 17:19:48,119 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 499 selfloop transitions, 38 changer transitions 0/541 dead transitions. [2024-06-20 17:19:48,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 541 transitions, 9988 flow [2024-06-20 17:19:48,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:19:48,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:19:48,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-20 17:19:48,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3821138211382114 [2024-06-20 17:19:48,120 INFO L175 Difference]: Start difference. First operand has 340 places, 504 transitions, 8352 flow. Second operand 9 states and 141 transitions. [2024-06-20 17:19:48,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 541 transitions, 9988 flow [2024-06-20 17:19:49,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 541 transitions, 9738 flow, removed 107 selfloop flow, removed 3 redundant places. [2024-06-20 17:19:49,457 INFO L231 Difference]: Finished difference. Result has 347 places, 513 transitions, 8512 flow [2024-06-20 17:19:49,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8102, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8512, PETRI_PLACES=347, PETRI_TRANSITIONS=513} [2024-06-20 17:19:49,458 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 305 predicate places. [2024-06-20 17:19:49,458 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 513 transitions, 8512 flow [2024-06-20 17:19:49,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:49,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:19:49,458 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:19:49,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-20 17:19:49,458 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:19:49,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:19:49,459 INFO L85 PathProgramCache]: Analyzing trace with hash -50148634, now seen corresponding path program 7 times [2024-06-20 17:19:49,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:19:49,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398600917] [2024-06-20 17:19:49,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:19:49,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:19:49,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:19:52,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:19:52,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:19:52,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398600917] [2024-06-20 17:19:52,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398600917] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:19:52,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:19:52,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:19:52,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146091173] [2024-06-20 17:19:52,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:19:52,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:19:52,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:19:52,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:19:52,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:19:52,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:19:52,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 513 transitions, 8512 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:52,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:19:52,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:19:52,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:19:54,197 INFO L124 PetriNetUnfolderBase]: 3012/4692 cut-off events. [2024-06-20 17:19:54,197 INFO L125 PetriNetUnfolderBase]: For 474361/474371 co-relation queries the response was YES. [2024-06-20 17:19:54,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48435 conditions, 4692 events. 3012/4692 cut-off events. For 474361/474371 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 26142 event pairs, 537 based on Foata normal form. 10/4698 useless extension candidates. Maximal degree in co-relation 48267. Up to 4387 conditions per place. [2024-06-20 17:19:54,258 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 480 selfloop transitions, 71 changer transitions 0/555 dead transitions. [2024-06-20 17:19:54,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 555 transitions, 10179 flow [2024-06-20 17:19:54,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:19:54,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:19:54,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 155 transitions. [2024-06-20 17:19:54,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3780487804878049 [2024-06-20 17:19:54,260 INFO L175 Difference]: Start difference. First operand has 347 places, 513 transitions, 8512 flow. Second operand 10 states and 155 transitions. [2024-06-20 17:19:54,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 555 transitions, 10179 flow [2024-06-20 17:19:55,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 555 transitions, 9961 flow, removed 94 selfloop flow, removed 4 redundant places. [2024-06-20 17:19:55,462 INFO L231 Difference]: Finished difference. Result has 353 places, 523 transitions, 8753 flow [2024-06-20 17:19:55,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8294, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8753, PETRI_PLACES=353, PETRI_TRANSITIONS=523} [2024-06-20 17:19:55,463 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 311 predicate places. [2024-06-20 17:19:55,463 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 523 transitions, 8753 flow [2024-06-20 17:19:55,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:55,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:19:55,463 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:19:55,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-20 17:19:55,464 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:19:55,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:19:55,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1663283760, now seen corresponding path program 8 times [2024-06-20 17:19:55,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:19:55,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860686320] [2024-06-20 17:19:55,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:19:55,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:19:55,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:19:58,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:19:58,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:19:58,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860686320] [2024-06-20 17:19:58,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860686320] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:19:58,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:19:58,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:19:58,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922418992] [2024-06-20 17:19:58,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:19:58,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:19:58,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:19:58,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:19:58,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:19:58,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:19:58,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 523 transitions, 8753 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:58,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:19:58,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:19:58,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:20:00,154 INFO L124 PetriNetUnfolderBase]: 3022/4708 cut-off events. [2024-06-20 17:20:00,154 INFO L125 PetriNetUnfolderBase]: For 487843/487853 co-relation queries the response was YES. [2024-06-20 17:20:00,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48990 conditions, 4708 events. 3022/4708 cut-off events. For 487843/487853 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 26278 event pairs, 537 based on Foata normal form. 10/4714 useless extension candidates. Maximal degree in co-relation 48820. Up to 4412 conditions per place. [2024-06-20 17:20:00,228 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 478 selfloop transitions, 69 changer transitions 0/551 dead transitions. [2024-06-20 17:20:00,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 551 transitions, 10051 flow [2024-06-20 17:20:00,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:20:00,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:20:00,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 138 transitions. [2024-06-20 17:20:00,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37398373983739835 [2024-06-20 17:20:00,229 INFO L175 Difference]: Start difference. First operand has 353 places, 523 transitions, 8753 flow. Second operand 9 states and 138 transitions. [2024-06-20 17:20:00,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 551 transitions, 10051 flow [2024-06-20 17:20:01,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 551 transitions, 9674 flow, removed 136 selfloop flow, removed 7 redundant places. [2024-06-20 17:20:01,588 INFO L231 Difference]: Finished difference. Result has 355 places, 526 transitions, 8648 flow [2024-06-20 17:20:01,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8430, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=523, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=454, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8648, PETRI_PLACES=355, PETRI_TRANSITIONS=526} [2024-06-20 17:20:01,589 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 313 predicate places. [2024-06-20 17:20:01,589 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 526 transitions, 8648 flow [2024-06-20 17:20:01,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:20:01,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:20:01,589 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:20:01,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-20 17:20:01,590 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:20:01,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:20:01,590 INFO L85 PathProgramCache]: Analyzing trace with hash 55445896, now seen corresponding path program 9 times [2024-06-20 17:20:01,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:20:01,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926136325] [2024-06-20 17:20:01,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:20:01,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:20:01,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:20:07,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:20:07,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:20:07,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926136325] [2024-06-20 17:20:07,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926136325] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:20:07,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:20:07,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:20:07,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153726617] [2024-06-20 17:20:07,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:20:07,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:20:07,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:20:07,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:20:07,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:20:07,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:20:07,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 526 transitions, 8648 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:20:07,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:20:07,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:20:07,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:20:09,451 INFO L124 PetriNetUnfolderBase]: 3080/4780 cut-off events. [2024-06-20 17:20:09,451 INFO L125 PetriNetUnfolderBase]: For 519795/519805 co-relation queries the response was YES. [2024-06-20 17:20:09,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50563 conditions, 4780 events. 3080/4780 cut-off events. For 519795/519805 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 26616 event pairs, 511 based on Foata normal form. 10/4786 useless extension candidates. Maximal degree in co-relation 50395. Up to 4286 conditions per place. [2024-06-20 17:20:09,524 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 439 selfloop transitions, 122 changer transitions 0/565 dead transitions. [2024-06-20 17:20:09,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 565 transitions, 10638 flow [2024-06-20 17:20:09,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:20:09,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:20:09,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-20 17:20:09,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4037940379403794 [2024-06-20 17:20:09,525 INFO L175 Difference]: Start difference. First operand has 355 places, 526 transitions, 8648 flow. Second operand 9 states and 149 transitions. [2024-06-20 17:20:09,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 565 transitions, 10638 flow [2024-06-20 17:20:10,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 565 transitions, 10429 flow, removed 26 selfloop flow, removed 8 redundant places. [2024-06-20 17:20:10,944 INFO L231 Difference]: Finished difference. Result has 356 places, 536 transitions, 9155 flow [2024-06-20 17:20:10,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8443, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9155, PETRI_PLACES=356, PETRI_TRANSITIONS=536} [2024-06-20 17:20:10,945 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 314 predicate places. [2024-06-20 17:20:10,945 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 536 transitions, 9155 flow [2024-06-20 17:20:10,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:20:10,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:20:10,945 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:20:10,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-20 17:20:10,946 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:20:10,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:20:10,946 INFO L85 PathProgramCache]: Analyzing trace with hash 439853304, now seen corresponding path program 5 times [2024-06-20 17:20:10,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:20:10,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706509312] [2024-06-20 17:20:10,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:20:10,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:20:10,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:20:14,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:20:14,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:20:14,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706509312] [2024-06-20 17:20:14,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706509312] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:20:14,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:20:14,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:20:14,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500068327] [2024-06-20 17:20:14,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:20:14,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:20:14,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:20:14,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:20:14,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:20:14,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:20:14,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 536 transitions, 9155 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:20:14,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:20:14,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:20:14,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:20:16,289 INFO L124 PetriNetUnfolderBase]: 3074/4782 cut-off events. [2024-06-20 17:20:16,289 INFO L125 PetriNetUnfolderBase]: For 522853/522863 co-relation queries the response was YES. [2024-06-20 17:20:16,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50904 conditions, 4782 events. 3074/4782 cut-off events. For 522853/522863 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 26702 event pairs, 528 based on Foata normal form. 10/4788 useless extension candidates. Maximal degree in co-relation 50736. Up to 4526 conditions per place. [2024-06-20 17:20:16,370 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 520 selfloop transitions, 38 changer transitions 0/562 dead transitions. [2024-06-20 17:20:16,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 562 transitions, 10363 flow [2024-06-20 17:20:16,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:20:16,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:20:16,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 138 transitions. [2024-06-20 17:20:16,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37398373983739835 [2024-06-20 17:20:16,372 INFO L175 Difference]: Start difference. First operand has 356 places, 536 transitions, 9155 flow. Second operand 9 states and 138 transitions. [2024-06-20 17:20:16,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 562 transitions, 10363 flow [2024-06-20 17:20:18,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 562 transitions, 10048 flow, removed 123 selfloop flow, removed 5 redundant places. [2024-06-20 17:20:18,036 INFO L231 Difference]: Finished difference. Result has 360 places, 536 transitions, 8922 flow [2024-06-20 17:20:18,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8840, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=498, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8922, PETRI_PLACES=360, PETRI_TRANSITIONS=536} [2024-06-20 17:20:18,037 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 318 predicate places. [2024-06-20 17:20:18,037 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 536 transitions, 8922 flow [2024-06-20 17:20:18,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:20:18,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:20:18,037 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:20:18,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-20 17:20:18,037 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:20:18,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:20:18,038 INFO L85 PathProgramCache]: Analyzing trace with hash 439848840, now seen corresponding path program 10 times [2024-06-20 17:20:18,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:20:18,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863393858] [2024-06-20 17:20:18,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:20:18,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:20:18,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:20:21,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:20:21,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:20:21,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863393858] [2024-06-20 17:20:21,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863393858] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:20:21,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:20:21,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:20:21,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126314502] [2024-06-20 17:20:21,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:20:21,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:20:21,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:20:21,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:20:21,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:20:21,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:20:21,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 536 transitions, 8922 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:20:21,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:20:21,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:20:21,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:20:23,643 INFO L124 PetriNetUnfolderBase]: 3115/4833 cut-off events. [2024-06-20 17:20:23,644 INFO L125 PetriNetUnfolderBase]: For 533169/533179 co-relation queries the response was YES. [2024-06-20 17:20:23,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51491 conditions, 4833 events. 3115/4833 cut-off events. For 533169/533179 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 26977 event pairs, 525 based on Foata normal form. 12/4841 useless extension candidates. Maximal degree in co-relation 51322. Up to 4560 conditions per place. [2024-06-20 17:20:23,721 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 529 selfloop transitions, 41 changer transitions 0/574 dead transitions. [2024-06-20 17:20:23,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 574 transitions, 10629 flow [2024-06-20 17:20:23,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:20:23,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:20:23,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-20 17:20:23,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875338753387534 [2024-06-20 17:20:23,723 INFO L175 Difference]: Start difference. First operand has 360 places, 536 transitions, 8922 flow. Second operand 9 states and 143 transitions. [2024-06-20 17:20:23,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 574 transitions, 10629 flow [2024-06-20 17:20:25,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 574 transitions, 10561 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-20 17:20:25,092 INFO L231 Difference]: Finished difference. Result has 364 places, 546 transitions, 9272 flow [2024-06-20 17:20:25,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8854, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=499, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9272, PETRI_PLACES=364, PETRI_TRANSITIONS=546} [2024-06-20 17:20:25,092 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 322 predicate places. [2024-06-20 17:20:25,092 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 546 transitions, 9272 flow [2024-06-20 17:20:25,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:20:25,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:20:25,093 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:20:25,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-20 17:20:25,093 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:20:25,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:20:25,093 INFO L85 PathProgramCache]: Analyzing trace with hash 1258118928, now seen corresponding path program 11 times [2024-06-20 17:20:25,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:20:25,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722792441] [2024-06-20 17:20:25,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:20:25,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:20:25,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:20:28,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:20:28,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:20:28,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722792441] [2024-06-20 17:20:28,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722792441] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:20:28,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:20:28,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:20:28,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074974290] [2024-06-20 17:20:28,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:20:28,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:20:28,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:20:28,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:20:28,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:20:28,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:20:28,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 546 transitions, 9272 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:20:28,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:20:28,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:20:28,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:20:30,489 INFO L124 PetriNetUnfolderBase]: 3103/4817 cut-off events. [2024-06-20 17:20:30,489 INFO L125 PetriNetUnfolderBase]: For 530835/530845 co-relation queries the response was YES. [2024-06-20 17:20:30,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51171 conditions, 4817 events. 3103/4817 cut-off events. For 530835/530845 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 26883 event pairs, 525 based on Foata normal form. 12/4825 useless extension candidates. Maximal degree in co-relation 51000. Up to 4568 conditions per place. [2024-06-20 17:20:30,569 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 534 selfloop transitions, 34 changer transitions 0/572 dead transitions. [2024-06-20 17:20:30,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 572 transitions, 10500 flow [2024-06-20 17:20:30,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:20:30,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:20:30,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 139 transitions. [2024-06-20 17:20:30,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37669376693766937 [2024-06-20 17:20:30,570 INFO L175 Difference]: Start difference. First operand has 364 places, 546 transitions, 9272 flow. Second operand 9 states and 139 transitions. [2024-06-20 17:20:30,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 572 transitions, 10500 flow [2024-06-20 17:20:32,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 572 transitions, 10202 flow, removed 131 selfloop flow, removed 5 redundant places. [2024-06-20 17:20:32,148 INFO L231 Difference]: Finished difference. Result has 368 places, 546 transitions, 9049 flow [2024-06-20 17:20:32,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8974, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=546, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=512, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9049, PETRI_PLACES=368, PETRI_TRANSITIONS=546} [2024-06-20 17:20:32,149 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 326 predicate places. [2024-06-20 17:20:32,149 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 546 transitions, 9049 flow [2024-06-20 17:20:32,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:20:32,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:20:32,150 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:20:32,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-20 17:20:32,150 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:20:32,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:20:32,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1916883202, now seen corresponding path program 6 times [2024-06-20 17:20:32,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:20:32,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175948257] [2024-06-20 17:20:32,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:20:32,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:20:32,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:20:35,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:20:35,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:20:35,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175948257] [2024-06-20 17:20:35,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175948257] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:20:35,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:20:35,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:20:35,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396208445] [2024-06-20 17:20:35,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:20:35,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:20:35,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:20:35,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:20:35,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:20:35,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:20:35,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 546 transitions, 9049 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:20:35,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:20:35,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:20:35,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:20:38,156 INFO L124 PetriNetUnfolderBase]: 3129/4863 cut-off events. [2024-06-20 17:20:38,156 INFO L125 PetriNetUnfolderBase]: For 540677/540687 co-relation queries the response was YES. [2024-06-20 17:20:38,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51666 conditions, 4863 events. 3129/4863 cut-off events. For 540677/540687 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 27291 event pairs, 533 based on Foata normal form. 10/4869 useless extension candidates. Maximal degree in co-relation 51493. Up to 4588 conditions per place. [2024-06-20 17:20:38,235 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 523 selfloop transitions, 51 changer transitions 0/578 dead transitions. [2024-06-20 17:20:38,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 578 transitions, 10757 flow [2024-06-20 17:20:38,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:20:38,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:20:38,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 157 transitions. [2024-06-20 17:20:38,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34811529933481156 [2024-06-20 17:20:38,236 INFO L175 Difference]: Start difference. First operand has 368 places, 546 transitions, 9049 flow. Second operand 11 states and 157 transitions. [2024-06-20 17:20:38,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 578 transitions, 10757 flow [2024-06-20 17:20:39,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 578 transitions, 10684 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-20 17:20:39,823 INFO L231 Difference]: Finished difference. Result has 372 places, 552 transitions, 9394 flow [2024-06-20 17:20:39,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8976, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=546, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=498, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9394, PETRI_PLACES=372, PETRI_TRANSITIONS=552} [2024-06-20 17:20:39,824 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 330 predicate places. [2024-06-20 17:20:39,824 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 552 transitions, 9394 flow [2024-06-20 17:20:39,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:20:39,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:20:39,824 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:20:39,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-20 17:20:39,825 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:20:39,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:20:39,825 INFO L85 PathProgramCache]: Analyzing trace with hash 1916888968, now seen corresponding path program 12 times [2024-06-20 17:20:39,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:20:39,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337077270] [2024-06-20 17:20:39,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:20:39,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:20:39,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:20:42,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:20:42,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:20:42,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337077270] [2024-06-20 17:20:42,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337077270] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:20:42,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:20:42,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:20:42,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391670328] [2024-06-20 17:20:42,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:20:42,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:20:42,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:20:42,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:20:42,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:20:42,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:20:42,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 552 transitions, 9394 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:20:42,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:20:42,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:20:42,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:20:44,633 INFO L124 PetriNetUnfolderBase]: 3160/4904 cut-off events. [2024-06-20 17:20:44,633 INFO L125 PetriNetUnfolderBase]: For 566105/566115 co-relation queries the response was YES. [2024-06-20 17:20:44,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52842 conditions, 4904 events. 3160/4904 cut-off events. For 566105/566115 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 27488 event pairs, 540 based on Foata normal form. 10/4910 useless extension candidates. Maximal degree in co-relation 52668. Up to 4637 conditions per place. [2024-06-20 17:20:44,711 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 535 selfloop transitions, 47 changer transitions 0/586 dead transitions. [2024-06-20 17:20:44,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 586 transitions, 11085 flow [2024-06-20 17:20:44,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:20:44,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:20:44,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 147 transitions. [2024-06-20 17:20:44,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35853658536585364 [2024-06-20 17:20:44,712 INFO L175 Difference]: Start difference. First operand has 372 places, 552 transitions, 9394 flow. Second operand 10 states and 147 transitions. [2024-06-20 17:20:44,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 586 transitions, 11085 flow [2024-06-20 17:20:46,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 586 transitions, 10848 flow, removed 98 selfloop flow, removed 6 redundant places. [2024-06-20 17:20:46,673 INFO L231 Difference]: Finished difference. Result has 377 places, 561 transitions, 9548 flow [2024-06-20 17:20:46,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9157, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=552, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=508, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9548, PETRI_PLACES=377, PETRI_TRANSITIONS=561} [2024-06-20 17:20:46,674 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 335 predicate places. [2024-06-20 17:20:46,674 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 561 transitions, 9548 flow [2024-06-20 17:20:46,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:20:46,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:20:46,674 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:20:46,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-20 17:20:46,675 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:20:46,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:20:46,675 INFO L85 PathProgramCache]: Analyzing trace with hash 726740634, now seen corresponding path program 7 times [2024-06-20 17:20:46,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:20:46,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260785602] [2024-06-20 17:20:46,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:20:46,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:20:46,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:20:50,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:20:50,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:20:50,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260785602] [2024-06-20 17:20:50,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260785602] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:20:50,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:20:50,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:20:50,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512760122] [2024-06-20 17:20:50,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:20:50,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:20:50,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:20:50,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:20:50,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:20:50,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:20:50,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 561 transitions, 9548 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:20:50,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:20:50,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:20:50,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:20:52,899 INFO L124 PetriNetUnfolderBase]: 3154/4898 cut-off events. [2024-06-20 17:20:52,899 INFO L125 PetriNetUnfolderBase]: For 565772/565782 co-relation queries the response was YES. [2024-06-20 17:20:52,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52531 conditions, 4898 events. 3154/4898 cut-off events. For 565772/565782 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 27466 event pairs, 536 based on Foata normal form. 10/4904 useless extension candidates. Maximal degree in co-relation 52355. Up to 4626 conditions per place. [2024-06-20 17:20:52,978 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 529 selfloop transitions, 50 changer transitions 0/583 dead transitions. [2024-06-20 17:20:52,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 583 transitions, 10786 flow [2024-06-20 17:20:52,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:20:52,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:20:52,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 135 transitions. [2024-06-20 17:20:52,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36585365853658536 [2024-06-20 17:20:52,980 INFO L175 Difference]: Start difference. First operand has 377 places, 561 transitions, 9548 flow. Second operand 9 states and 135 transitions. [2024-06-20 17:20:52,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 583 transitions, 10786 flow [2024-06-20 17:20:54,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 583 transitions, 10509 flow, removed 114 selfloop flow, removed 6 redundant places. [2024-06-20 17:20:54,764 INFO L231 Difference]: Finished difference. Result has 380 places, 561 transitions, 9377 flow [2024-06-20 17:20:54,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9271, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=511, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9377, PETRI_PLACES=380, PETRI_TRANSITIONS=561} [2024-06-20 17:20:54,765 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 338 predicate places. [2024-06-20 17:20:54,765 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 561 transitions, 9377 flow [2024-06-20 17:20:54,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:20:54,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:20:54,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:20:54,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-20 17:20:54,766 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:20:54,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:20:54,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1547843790, now seen corresponding path program 13 times [2024-06-20 17:20:54,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:20:54,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317238875] [2024-06-20 17:20:54,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:20:54,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:20:54,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:20:58,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:20:58,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:20:58,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317238875] [2024-06-20 17:20:58,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317238875] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:20:58,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:20:58,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:20:58,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412371989] [2024-06-20 17:20:58,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:20:58,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:20:58,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:20:58,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:20:58,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:20:58,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:20:58,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 561 transitions, 9377 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:20:58,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:20:58,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:20:58,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:21:00,038 INFO L124 PetriNetUnfolderBase]: 3164/4904 cut-off events. [2024-06-20 17:21:00,038 INFO L125 PetriNetUnfolderBase]: For 572859/572869 co-relation queries the response was YES. [2024-06-20 17:21:00,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52602 conditions, 4904 events. 3164/4904 cut-off events. For 572859/572869 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 27449 event pairs, 522 based on Foata normal form. 10/4910 useless extension candidates. Maximal degree in co-relation 52424. Up to 4617 conditions per place. [2024-06-20 17:21:00,121 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 529 selfloop transitions, 54 changer transitions 0/587 dead transitions. [2024-06-20 17:21:00,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 587 transitions, 10751 flow [2024-06-20 17:21:00,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:21:00,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:21:00,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 136 transitions. [2024-06-20 17:21:00,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3685636856368564 [2024-06-20 17:21:00,122 INFO L175 Difference]: Start difference. First operand has 380 places, 561 transitions, 9377 flow. Second operand 9 states and 136 transitions. [2024-06-20 17:21:00,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 587 transitions, 10751 flow [2024-06-20 17:21:02,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 587 transitions, 10651 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-20 17:21:02,125 INFO L231 Difference]: Finished difference. Result has 381 places, 564 transitions, 9515 flow [2024-06-20 17:21:02,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9277, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=507, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9515, PETRI_PLACES=381, PETRI_TRANSITIONS=564} [2024-06-20 17:21:02,126 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 339 predicate places. [2024-06-20 17:21:02,126 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 564 transitions, 9515 flow [2024-06-20 17:21:02,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:21:02,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:21:02,126 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:21:02,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-20 17:21:02,126 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:21:02,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:21:02,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1924240618, now seen corresponding path program 14 times [2024-06-20 17:21:02,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:21:02,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377875233] [2024-06-20 17:21:02,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:21:02,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:21:02,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:21:05,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:21:05,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:21:05,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377875233] [2024-06-20 17:21:05,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377875233] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:21:05,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:21:05,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:21:05,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284043752] [2024-06-20 17:21:05,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:21:05,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:21:05,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:21:05,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:21:05,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:21:05,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:21:05,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 564 transitions, 9515 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:21:05,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:21:05,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:21:05,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:21:07,639 INFO L124 PetriNetUnfolderBase]: 3168/4916 cut-off events. [2024-06-20 17:21:07,640 INFO L125 PetriNetUnfolderBase]: For 585083/585093 co-relation queries the response was YES. [2024-06-20 17:21:07,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52779 conditions, 4916 events. 3168/4916 cut-off events. For 585083/585093 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 27542 event pairs, 541 based on Foata normal form. 12/4924 useless extension candidates. Maximal degree in co-relation 52600. Up to 4628 conditions per place. [2024-06-20 17:21:07,864 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 522 selfloop transitions, 63 changer transitions 0/589 dead transitions. [2024-06-20 17:21:07,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 589 transitions, 10881 flow [2024-06-20 17:21:07,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:21:07,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:21:07,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 146 transitions. [2024-06-20 17:21:07,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35609756097560974 [2024-06-20 17:21:07,866 INFO L175 Difference]: Start difference. First operand has 381 places, 564 transitions, 9515 flow. Second operand 10 states and 146 transitions. [2024-06-20 17:21:07,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 589 transitions, 10881 flow [2024-06-20 17:21:09,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 589 transitions, 10639 flow, removed 69 selfloop flow, removed 7 redundant places. [2024-06-20 17:21:09,713 INFO L231 Difference]: Finished difference. Result has 384 places, 567 transitions, 9545 flow [2024-06-20 17:21:09,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9273, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=564, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=501, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9545, PETRI_PLACES=384, PETRI_TRANSITIONS=567} [2024-06-20 17:21:09,714 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 342 predicate places. [2024-06-20 17:21:09,714 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 567 transitions, 9545 flow [2024-06-20 17:21:09,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:21:09,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:21:09,714 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:21:09,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-20 17:21:09,715 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:21:09,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:21:09,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1552075290, now seen corresponding path program 15 times [2024-06-20 17:21:09,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:21:09,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980527621] [2024-06-20 17:21:09,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:21:09,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:21:09,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:21:13,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:21:13,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:21:13,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980527621] [2024-06-20 17:21:13,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980527621] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:21:13,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:21:13,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:21:13,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092306999] [2024-06-20 17:21:13,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:21:13,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:21:13,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:21:13,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:21:13,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:21:13,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:21:13,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 567 transitions, 9545 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:21:13,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:21:13,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:21:13,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:21:15,276 INFO L124 PetriNetUnfolderBase]: 3198/4950 cut-off events. [2024-06-20 17:21:15,277 INFO L125 PetriNetUnfolderBase]: For 588058/588068 co-relation queries the response was YES. [2024-06-20 17:21:15,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53134 conditions, 4950 events. 3198/4950 cut-off events. For 588058/588068 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 27672 event pairs, 518 based on Foata normal form. 10/4956 useless extension candidates. Maximal degree in co-relation 52954. Up to 4535 conditions per place. [2024-06-20 17:21:15,349 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 494 selfloop transitions, 101 changer transitions 0/599 dead transitions. [2024-06-20 17:21:15,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 599 transitions, 11188 flow [2024-06-20 17:21:15,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:21:15,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:21:15,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-20 17:21:15,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38482384823848237 [2024-06-20 17:21:15,350 INFO L175 Difference]: Start difference. First operand has 384 places, 567 transitions, 9545 flow. Second operand 9 states and 142 transitions. [2024-06-20 17:21:15,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 599 transitions, 11188 flow [2024-06-20 17:21:17,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 599 transitions, 10925 flow, removed 63 selfloop flow, removed 11 redundant places. [2024-06-20 17:21:17,243 INFO L231 Difference]: Finished difference. Result has 382 places, 574 transitions, 9675 flow [2024-06-20 17:21:17,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9286, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=473, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9675, PETRI_PLACES=382, PETRI_TRANSITIONS=574} [2024-06-20 17:21:17,244 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 340 predicate places. [2024-06-20 17:21:17,244 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 574 transitions, 9675 flow [2024-06-20 17:21:17,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:21:17,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:21:17,245 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:21:17,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-20 17:21:17,245 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:21:17,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:21:17,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1547843976, now seen corresponding path program 8 times [2024-06-20 17:21:17,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:21:17,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362589320] [2024-06-20 17:21:17,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:21:17,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:21:17,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:21:20,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:21:20,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:21:20,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362589320] [2024-06-20 17:21:20,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362589320] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:21:20,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:21:20,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:21:20,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064390596] [2024-06-20 17:21:20,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:21:20,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:21:20,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:21:20,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:21:20,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:21:20,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:21:20,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 574 transitions, 9675 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:21:20,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:21:20,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:21:20,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:21:22,628 INFO L124 PetriNetUnfolderBase]: 3192/4952 cut-off events. [2024-06-20 17:21:22,629 INFO L125 PetriNetUnfolderBase]: For 569995/570005 co-relation queries the response was YES. [2024-06-20 17:21:22,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52632 conditions, 4952 events. 3192/4952 cut-off events. For 569995/570005 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 27809 event pairs, 528 based on Foata normal form. 10/4958 useless extension candidates. Maximal degree in co-relation 52455. Up to 4606 conditions per place. [2024-06-20 17:21:22,845 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 521 selfloop transitions, 75 changer transitions 0/600 dead transitions. [2024-06-20 17:21:22,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 600 transitions, 11115 flow [2024-06-20 17:21:22,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:21:22,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:21:22,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 136 transitions. [2024-06-20 17:21:22,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3685636856368564 [2024-06-20 17:21:22,846 INFO L175 Difference]: Start difference. First operand has 382 places, 574 transitions, 9675 flow. Second operand 9 states and 136 transitions. [2024-06-20 17:21:22,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 600 transitions, 11115 flow [2024-06-20 17:21:24,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 600 transitions, 10770 flow, removed 68 selfloop flow, removed 6 redundant places. [2024-06-20 17:21:24,785 INFO L231 Difference]: Finished difference. Result has 385 places, 577 transitions, 9650 flow [2024-06-20 17:21:24,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9330, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=499, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9650, PETRI_PLACES=385, PETRI_TRANSITIONS=577} [2024-06-20 17:21:24,786 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 343 predicate places. [2024-06-20 17:21:24,786 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 577 transitions, 9650 flow [2024-06-20 17:21:24,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:21:24,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:21:24,786 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:21:24,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-20 17:21:24,787 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:21:24,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:21:24,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1929095218, now seen corresponding path program 16 times [2024-06-20 17:21:24,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:21:24,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481297524] [2024-06-20 17:21:24,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:21:24,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:21:24,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:21:28,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:21:28,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:21:28,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481297524] [2024-06-20 17:21:28,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481297524] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:21:28,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:21:28,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:21:28,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637634333] [2024-06-20 17:21:28,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:21:28,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:21:28,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:21:28,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:21:28,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:21:28,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:21:28,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 577 transitions, 9650 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:21:28,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:21:28,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:21:28,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:21:30,261 INFO L124 PetriNetUnfolderBase]: 3186/4936 cut-off events. [2024-06-20 17:21:30,261 INFO L125 PetriNetUnfolderBase]: For 573345/573355 co-relation queries the response was YES. [2024-06-20 17:21:30,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52356 conditions, 4936 events. 3186/4936 cut-off events. For 573345/573355 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 27626 event pairs, 521 based on Foata normal form. 10/4942 useless extension candidates. Maximal degree in co-relation 52178. Up to 4593 conditions per place. [2024-06-20 17:21:30,349 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 526 selfloop transitions, 70 changer transitions 0/600 dead transitions. [2024-06-20 17:21:30,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 600 transitions, 10932 flow [2024-06-20 17:21:30,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:21:30,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:21:30,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 138 transitions. [2024-06-20 17:21:30,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37398373983739835 [2024-06-20 17:21:30,351 INFO L175 Difference]: Start difference. First operand has 385 places, 577 transitions, 9650 flow. Second operand 9 states and 138 transitions. [2024-06-20 17:21:30,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 600 transitions, 10932 flow [2024-06-20 17:21:32,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 600 transitions, 10648 flow, removed 87 selfloop flow, removed 6 redundant places. [2024-06-20 17:21:32,455 INFO L231 Difference]: Finished difference. Result has 388 places, 577 transitions, 9512 flow [2024-06-20 17:21:32,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9366, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=577, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=507, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9512, PETRI_PLACES=388, PETRI_TRANSITIONS=577} [2024-06-20 17:21:32,456 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 346 predicate places. [2024-06-20 17:21:32,456 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 577 transitions, 9512 flow [2024-06-20 17:21:32,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:21:32,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:21:32,456 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:21:32,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-20 17:21:32,457 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:21:32,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:21:32,457 INFO L85 PathProgramCache]: Analyzing trace with hash -5338982, now seen corresponding path program 17 times [2024-06-20 17:21:32,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:21:32,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784421438] [2024-06-20 17:21:32,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:21:32,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:21:32,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:21:35,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:21:35,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:21:35,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784421438] [2024-06-20 17:21:35,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784421438] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:21:35,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:21:35,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:21:35,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266345863] [2024-06-20 17:21:35,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:21:35,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:21:35,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:21:35,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:21:35,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:21:35,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:21:35,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 577 transitions, 9512 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:21:35,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:21:35,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:21:35,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:21:37,152 INFO L124 PetriNetUnfolderBase]: 3211/4966 cut-off events. [2024-06-20 17:21:37,152 INFO L125 PetriNetUnfolderBase]: For 581305/581307 co-relation queries the response was YES. [2024-06-20 17:21:37,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52625 conditions, 4966 events. 3211/4966 cut-off events. For 581305/581307 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 27748 event pairs, 550 based on Foata normal form. 2/4961 useless extension candidates. Maximal degree in co-relation 52446. Up to 4575 conditions per place. [2024-06-20 17:21:37,255 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 485 selfloop transitions, 134 changer transitions 0/623 dead transitions. [2024-06-20 17:21:37,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 623 transitions, 11428 flow [2024-06-20 17:21:37,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:21:37,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:21:37,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 149 transitions. [2024-06-20 17:21:37,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36341463414634145 [2024-06-20 17:21:37,257 INFO L175 Difference]: Start difference. First operand has 388 places, 577 transitions, 9512 flow. Second operand 10 states and 149 transitions. [2024-06-20 17:21:37,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 623 transitions, 11428 flow [2024-06-20 17:21:39,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 623 transitions, 11203 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-20 17:21:39,459 INFO L231 Difference]: Finished difference. Result has 395 places, 603 transitions, 10322 flow [2024-06-20 17:21:39,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9287, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=577, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10322, PETRI_PLACES=395, PETRI_TRANSITIONS=603} [2024-06-20 17:21:39,459 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 353 predicate places. [2024-06-20 17:21:39,459 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 603 transitions, 10322 flow [2024-06-20 17:21:39,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:21:39,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:21:39,460 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:21:39,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-20 17:21:39,460 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:21:39,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:21:39,460 INFO L85 PathProgramCache]: Analyzing trace with hash 2138443152, now seen corresponding path program 18 times [2024-06-20 17:21:39,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:21:39,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315645617] [2024-06-20 17:21:39,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:21:39,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:21:39,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:21:42,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:21:42,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:21:42,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315645617] [2024-06-20 17:21:42,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315645617] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:21:42,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:21:42,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:21:42,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880531289] [2024-06-20 17:21:42,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:21:42,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:21:42,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:21:42,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:21:42,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:21:42,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:21:42,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 603 transitions, 10322 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:21:42,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:21:42,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:21:42,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:21:44,318 INFO L124 PetriNetUnfolderBase]: 3237/5002 cut-off events. [2024-06-20 17:21:44,319 INFO L125 PetriNetUnfolderBase]: For 608303/608305 co-relation queries the response was YES. [2024-06-20 17:21:44,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54078 conditions, 5002 events. 3237/5002 cut-off events. For 608303/608305 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 27992 event pairs, 551 based on Foata normal form. 2/4997 useless extension candidates. Maximal degree in co-relation 53894. Up to 4551 conditions per place. [2024-06-20 17:21:44,405 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 467 selfloop transitions, 158 changer transitions 0/629 dead transitions. [2024-06-20 17:21:44,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 629 transitions, 12050 flow [2024-06-20 17:21:44,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:21:44,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:21:44,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-20 17:21:44,406 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3794037940379404 [2024-06-20 17:21:44,407 INFO L175 Difference]: Start difference. First operand has 395 places, 603 transitions, 10322 flow. Second operand 9 states and 140 transitions. [2024-06-20 17:21:44,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 629 transitions, 12050 flow [2024-06-20 17:21:46,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 629 transitions, 11571 flow, removed 220 selfloop flow, removed 3 redundant places. [2024-06-20 17:21:46,724 INFO L231 Difference]: Finished difference. Result has 402 places, 609 transitions, 10419 flow [2024-06-20 17:21:46,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9845, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=603, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10419, PETRI_PLACES=402, PETRI_TRANSITIONS=609} [2024-06-20 17:21:46,724 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 360 predicate places. [2024-06-20 17:21:46,725 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 609 transitions, 10419 flow [2024-06-20 17:21:46,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:21:46,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:21:46,725 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:21:46,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-20 17:21:46,725 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:21:46,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:21:46,737 INFO L85 PathProgramCache]: Analyzing trace with hash -9570482, now seen corresponding path program 19 times [2024-06-20 17:21:46,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:21:46,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494606892] [2024-06-20 17:21:46,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:21:46,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:21:46,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:21:49,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:21:49,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:21:49,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494606892] [2024-06-20 17:21:49,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494606892] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:21:49,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:21:49,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:21:49,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487827269] [2024-06-20 17:21:49,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:21:49,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:21:49,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:21:49,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:21:49,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:21:49,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:21:49,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 609 transitions, 10419 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:21:49,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:21:49,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:21:49,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:21:52,247 INFO L124 PetriNetUnfolderBase]: 3317/5123 cut-off events. [2024-06-20 17:21:52,248 INFO L125 PetriNetUnfolderBase]: For 661828/661830 co-relation queries the response was YES. [2024-06-20 17:21:52,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56715 conditions, 5123 events. 3317/5123 cut-off events. For 661828/661830 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 28766 event pairs, 547 based on Foata normal form. 4/5120 useless extension candidates. Maximal degree in co-relation 56528. Up to 4495 conditions per place. [2024-06-20 17:21:52,328 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 475 selfloop transitions, 188 changer transitions 0/667 dead transitions. [2024-06-20 17:21:52,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 667 transitions, 13135 flow [2024-06-20 17:21:52,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:21:52,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:21:52,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 169 transitions. [2024-06-20 17:21:52,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37472283813747226 [2024-06-20 17:21:52,330 INFO L175 Difference]: Start difference. First operand has 402 places, 609 transitions, 10419 flow. Second operand 11 states and 169 transitions. [2024-06-20 17:21:52,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 667 transitions, 13135 flow [2024-06-20 17:21:54,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 667 transitions, 12643 flow, removed 139 selfloop flow, removed 5 redundant places. [2024-06-20 17:21:54,630 INFO L231 Difference]: Finished difference. Result has 410 places, 635 transitions, 11295 flow [2024-06-20 17:21:54,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9981, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=609, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11295, PETRI_PLACES=410, PETRI_TRANSITIONS=635} [2024-06-20 17:21:54,631 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 368 predicate places. [2024-06-20 17:21:54,631 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 635 transitions, 11295 flow [2024-06-20 17:21:54,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:21:54,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:21:54,631 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:21:54,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-20 17:21:54,631 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:21:54,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:21:54,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1700917692, now seen corresponding path program 20 times [2024-06-20 17:21:54,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:21:54,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237012927] [2024-06-20 17:21:54,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:21:54,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:21:54,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:21:57,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:21:57,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:21:57,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237012927] [2024-06-20 17:21:57,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237012927] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:21:57,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:21:57,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:21:57,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475724259] [2024-06-20 17:21:57,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:21:57,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:21:57,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:21:57,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:21:57,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:21:57,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:21:57,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 635 transitions, 11295 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:21:57,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:21:57,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:21:57,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:21:59,512 INFO L124 PetriNetUnfolderBase]: 3347/5157 cut-off events. [2024-06-20 17:21:59,512 INFO L125 PetriNetUnfolderBase]: For 699646/699648 co-relation queries the response was YES. [2024-06-20 17:21:59,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58289 conditions, 5157 events. 3347/5157 cut-off events. For 699646/699648 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 28877 event pairs, 563 based on Foata normal form. 6/5156 useless extension candidates. Maximal degree in co-relation 58099. Up to 4855 conditions per place. [2024-06-20 17:21:59,603 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 577 selfloop transitions, 81 changer transitions 0/662 dead transitions. [2024-06-20 17:21:59,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 662 transitions, 13130 flow [2024-06-20 17:21:59,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:21:59,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:21:59,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 158 transitions. [2024-06-20 17:21:59,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35033259423503327 [2024-06-20 17:21:59,604 INFO L175 Difference]: Start difference. First operand has 410 places, 635 transitions, 11295 flow. Second operand 11 states and 158 transitions. [2024-06-20 17:21:59,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 662 transitions, 13130 flow [2024-06-20 17:22:01,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 662 transitions, 12714 flow, removed 167 selfloop flow, removed 5 redundant places. [2024-06-20 17:22:01,993 INFO L231 Difference]: Finished difference. Result has 417 places, 644 transitions, 11542 flow [2024-06-20 17:22:01,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10929, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=635, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=554, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11542, PETRI_PLACES=417, PETRI_TRANSITIONS=644} [2024-06-20 17:22:01,993 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 375 predicate places. [2024-06-20 17:22:01,993 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 644 transitions, 11542 flow [2024-06-20 17:22:01,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:22:01,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:22:01,994 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:22:01,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-20 17:22:01,994 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:22:01,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:22:01,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1878049212, now seen corresponding path program 21 times [2024-06-20 17:22:01,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:22:01,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650597078] [2024-06-20 17:22:01,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:22:01,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:22:02,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:22:04,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:22:04,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:22:04,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650597078] [2024-06-20 17:22:04,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650597078] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:22:04,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:22:04,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:22:04,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783259551] [2024-06-20 17:22:04,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:22:04,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:22:04,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:22:04,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:22:04,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:22:04,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:22:04,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 644 transitions, 11542 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:22:04,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:22:04,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:22:04,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:22:06,679 INFO L124 PetriNetUnfolderBase]: 3367/5191 cut-off events. [2024-06-20 17:22:06,679 INFO L125 PetriNetUnfolderBase]: For 702173/702175 co-relation queries the response was YES. [2024-06-20 17:22:06,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58773 conditions, 5191 events. 3367/5191 cut-off events. For 702173/702175 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 29187 event pairs, 557 based on Foata normal form. 4/5188 useless extension candidates. Maximal degree in co-relation 58580. Up to 4859 conditions per place. [2024-06-20 17:22:06,761 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 589 selfloop transitions, 79 changer transitions 0/672 dead transitions. [2024-06-20 17:22:06,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 672 transitions, 13223 flow [2024-06-20 17:22:06,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:22:06,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:22:06,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 135 transitions. [2024-06-20 17:22:06,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36585365853658536 [2024-06-20 17:22:06,763 INFO L175 Difference]: Start difference. First operand has 417 places, 644 transitions, 11542 flow. Second operand 9 states and 135 transitions. [2024-06-20 17:22:06,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 672 transitions, 13223 flow [2024-06-20 17:22:09,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 672 transitions, 12752 flow, removed 172 selfloop flow, removed 6 redundant places. [2024-06-20 17:22:09,360 INFO L231 Difference]: Finished difference. Result has 420 places, 648 transitions, 11430 flow [2024-06-20 17:22:09,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11076, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=644, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=565, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11430, PETRI_PLACES=420, PETRI_TRANSITIONS=648} [2024-06-20 17:22:09,365 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 378 predicate places. [2024-06-20 17:22:09,365 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 648 transitions, 11430 flow [2024-06-20 17:22:09,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:22:09,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:22:09,366 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:22:09,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-20 17:22:09,366 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:22:09,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:22:09,367 INFO L85 PathProgramCache]: Analyzing trace with hash 1389049026, now seen corresponding path program 22 times [2024-06-20 17:22:09,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:22:09,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595872860] [2024-06-20 17:22:09,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:22:09,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:22:09,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:22:12,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:22:12,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:22:12,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595872860] [2024-06-20 17:22:12,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595872860] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:22:12,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:22:12,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:22:12,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150590584] [2024-06-20 17:22:12,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:22:12,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:22:12,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:22:12,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:22:12,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:22:12,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:22:12,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 648 transitions, 11430 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:22:12,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:22:12,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:22:12,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:22:14,359 INFO L124 PetriNetUnfolderBase]: 3370/5190 cut-off events. [2024-06-20 17:22:14,359 INFO L125 PetriNetUnfolderBase]: For 700612/700614 co-relation queries the response was YES. [2024-06-20 17:22:14,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58070 conditions, 5190 events. 3370/5190 cut-off events. For 700612/700614 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 29091 event pairs, 565 based on Foata normal form. 6/5189 useless extension candidates. Maximal degree in co-relation 57876. Up to 4907 conditions per place. [2024-06-20 17:22:14,447 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 595 selfloop transitions, 72 changer transitions 0/671 dead transitions. [2024-06-20 17:22:14,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 671 transitions, 12984 flow [2024-06-20 17:22:14,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:22:14,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:22:14,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 145 transitions. [2024-06-20 17:22:14,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35365853658536583 [2024-06-20 17:22:14,448 INFO L175 Difference]: Start difference. First operand has 420 places, 648 transitions, 11430 flow. Second operand 10 states and 145 transitions. [2024-06-20 17:22:14,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 671 transitions, 12984 flow [2024-06-20 17:22:16,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 671 transitions, 12583 flow, removed 114 selfloop flow, removed 6 redundant places. [2024-06-20 17:22:16,857 INFO L231 Difference]: Finished difference. Result has 425 places, 654 transitions, 11367 flow [2024-06-20 17:22:16,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11029, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=648, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=576, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11367, PETRI_PLACES=425, PETRI_TRANSITIONS=654} [2024-06-20 17:22:16,858 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 383 predicate places. [2024-06-20 17:22:16,858 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 654 transitions, 11367 flow [2024-06-20 17:22:16,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:22:16,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:22:16,858 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:22:16,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-20 17:22:16,859 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:22:16,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:22:16,859 INFO L85 PathProgramCache]: Analyzing trace with hash 1878286362, now seen corresponding path program 23 times [2024-06-20 17:22:16,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:22:16,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006029015] [2024-06-20 17:22:16,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:22:16,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:22:16,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:22:19,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:22:19,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:22:19,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006029015] [2024-06-20 17:22:19,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006029015] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:22:19,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:22:19,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:22:19,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602036545] [2024-06-20 17:22:19,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:22:19,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:22:19,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:22:19,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:22:19,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:22:19,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:22:19,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 654 transitions, 11367 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:22:19,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:22:19,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:22:19,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:22:21,426 INFO L124 PetriNetUnfolderBase]: 3369/5189 cut-off events. [2024-06-20 17:22:21,426 INFO L125 PetriNetUnfolderBase]: For 687356/687358 co-relation queries the response was YES. [2024-06-20 17:22:21,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57565 conditions, 5189 events. 3369/5189 cut-off events. For 687356/687358 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 29069 event pairs, 558 based on Foata normal form. 3/5185 useless extension candidates. Maximal degree in co-relation 57369. Up to 4782 conditions per place. [2024-06-20 17:22:21,507 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 542 selfloop transitions, 139 changer transitions 0/685 dead transitions. [2024-06-20 17:22:21,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 685 transitions, 13417 flow [2024-06-20 17:22:21,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:22:21,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:22:21,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 149 transitions. [2024-06-20 17:22:21,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36341463414634145 [2024-06-20 17:22:21,509 INFO L175 Difference]: Start difference. First operand has 425 places, 654 transitions, 11367 flow. Second operand 10 states and 149 transitions. [2024-06-20 17:22:21,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 685 transitions, 13417 flow [2024-06-20 17:22:24,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 685 transitions, 13119 flow, removed 57 selfloop flow, removed 8 redundant places. [2024-06-20 17:22:24,025 INFO L231 Difference]: Finished difference. Result has 428 places, 664 transitions, 11833 flow [2024-06-20 17:22:24,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11069, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=654, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=518, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11833, PETRI_PLACES=428, PETRI_TRANSITIONS=664} [2024-06-20 17:22:24,026 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 386 predicate places. [2024-06-20 17:22:24,026 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 664 transitions, 11833 flow [2024-06-20 17:22:24,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:22:24,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:22:24,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:22:24,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-20 17:22:24,026 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:22:24,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:22:24,027 INFO L85 PathProgramCache]: Analyzing trace with hash -9956432, now seen corresponding path program 24 times [2024-06-20 17:22:24,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:22:24,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052715865] [2024-06-20 17:22:24,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:22:24,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:22:24,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:22:27,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:22:27,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:22:27,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052715865] [2024-06-20 17:22:27,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052715865] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:22:27,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:22:27,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:22:27,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888786607] [2024-06-20 17:22:27,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:22:27,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:22:27,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:22:27,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:22:27,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:22:27,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:22:27,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 664 transitions, 11833 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:22:27,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:22:27,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:22:27,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:22:29,403 INFO L124 PetriNetUnfolderBase]: 3383/5211 cut-off events. [2024-06-20 17:22:29,403 INFO L125 PetriNetUnfolderBase]: For 690976/690978 co-relation queries the response was YES. [2024-06-20 17:22:29,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57906 conditions, 5211 events. 3383/5211 cut-off events. For 690976/690978 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 29274 event pairs, 561 based on Foata normal form. 2/5206 useless extension candidates. Maximal degree in co-relation 57709. Up to 4906 conditions per place. [2024-06-20 17:22:29,492 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 590 selfloop transitions, 92 changer transitions 0/686 dead transitions. [2024-06-20 17:22:29,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 686 transitions, 13307 flow [2024-06-20 17:22:29,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:22:29,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:22:29,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 146 transitions. [2024-06-20 17:22:29,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35609756097560974 [2024-06-20 17:22:29,493 INFO L175 Difference]: Start difference. First operand has 428 places, 664 transitions, 11833 flow. Second operand 10 states and 146 transitions. [2024-06-20 17:22:29,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 686 transitions, 13307 flow [2024-06-20 17:22:31,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 686 transitions, 12805 flow, removed 176 selfloop flow, removed 6 redundant places. [2024-06-20 17:22:31,962 INFO L231 Difference]: Finished difference. Result has 432 places, 669 transitions, 11597 flow [2024-06-20 17:22:31,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11331, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=664, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=572, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11597, PETRI_PLACES=432, PETRI_TRANSITIONS=669} [2024-06-20 17:22:31,963 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 390 predicate places. [2024-06-20 17:22:31,963 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 669 transitions, 11597 flow [2024-06-20 17:22:31,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:22:31,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:22:31,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:22:31,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-20 17:22:31,963 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:22:31,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:22:31,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1878479740, now seen corresponding path program 1 times [2024-06-20 17:22:31,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:22:31,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784626478] [2024-06-20 17:22:31,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:22:31,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:22:31,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:22:35,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:22:35,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:22:35,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784626478] [2024-06-20 17:22:35,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784626478] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:22:35,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:22:35,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:22:35,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009371663] [2024-06-20 17:22:35,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:22:35,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:22:35,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:22:35,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:22:35,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:22:35,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:22:35,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 669 transitions, 11597 flow. Second operand has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 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) [2024-06-20 17:22:35,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:22:35,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:22:35,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:22:37,426 INFO L124 PetriNetUnfolderBase]: 3403/5244 cut-off events. [2024-06-20 17:22:37,426 INFO L125 PetriNetUnfolderBase]: For 713696/713698 co-relation queries the response was YES. [2024-06-20 17:22:37,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58062 conditions, 5244 events. 3403/5244 cut-off events. For 713696/713698 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 29507 event pairs, 555 based on Foata normal form. 6/5248 useless extension candidates. Maximal degree in co-relation 57863. Up to 5064 conditions per place. [2024-06-20 17:22:37,553 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 662 selfloop transitions, 23 changer transitions 0/689 dead transitions. [2024-06-20 17:22:37,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 689 transitions, 13095 flow [2024-06-20 17:22:37,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:22:37,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:22:37,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 125 transitions. [2024-06-20 17:22:37,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33875338753387535 [2024-06-20 17:22:37,555 INFO L175 Difference]: Start difference. First operand has 432 places, 669 transitions, 11597 flow. Second operand 9 states and 125 transitions. [2024-06-20 17:22:37,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 689 transitions, 13095 flow [2024-06-20 17:22:40,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 689 transitions, 12921 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-20 17:22:40,288 INFO L231 Difference]: Finished difference. Result has 434 places, 670 transitions, 11499 flow [2024-06-20 17:22:40,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11423, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=669, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=646, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11499, PETRI_PLACES=434, PETRI_TRANSITIONS=670} [2024-06-20 17:22:40,289 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 392 predicate places. [2024-06-20 17:22:40,289 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 670 transitions, 11499 flow [2024-06-20 17:22:40,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 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) [2024-06-20 17:22:40,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:22:40,289 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:22:40,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-20 17:22:40,289 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:22:40,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:22:40,290 INFO L85 PathProgramCache]: Analyzing trace with hash -36767212, now seen corresponding path program 2 times [2024-06-20 17:22:40,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:22:40,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428460153] [2024-06-20 17:22:40,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:22:40,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:22:40,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:22:43,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:22:43,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:22:43,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428460153] [2024-06-20 17:22:43,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428460153] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:22:43,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:22:43,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:22:43,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476622936] [2024-06-20 17:22:43,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:22:43,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:22:43,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:22:43,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:22:43,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:22:43,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:22:43,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 670 transitions, 11499 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:22:43,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:22:43,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:22:43,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:22:45,528 INFO L124 PetriNetUnfolderBase]: 3390/5229 cut-off events. [2024-06-20 17:22:45,528 INFO L125 PetriNetUnfolderBase]: For 699346/699348 co-relation queries the response was YES. [2024-06-20 17:22:45,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57306 conditions, 5229 events. 3390/5229 cut-off events. For 699346/699348 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 29481 event pairs, 541 based on Foata normal form. 6/5233 useless extension candidates. Maximal degree in co-relation 57107. Up to 5048 conditions per place. [2024-06-20 17:22:45,609 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 667 selfloop transitions, 18 changer transitions 0/689 dead transitions. [2024-06-20 17:22:45,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 689 transitions, 12967 flow [2024-06-20 17:22:45,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:22:45,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:22:45,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 124 transitions. [2024-06-20 17:22:45,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33604336043360433 [2024-06-20 17:22:45,611 INFO L175 Difference]: Start difference. First operand has 434 places, 670 transitions, 11499 flow. Second operand 9 states and 124 transitions. [2024-06-20 17:22:45,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 689 transitions, 12967 flow [2024-06-20 17:22:48,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 689 transitions, 12905 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-20 17:22:48,739 INFO L231 Difference]: Finished difference. Result has 436 places, 670 transitions, 11477 flow [2024-06-20 17:22:48,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11437, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=670, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=652, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11477, PETRI_PLACES=436, PETRI_TRANSITIONS=670} [2024-06-20 17:22:48,739 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 394 predicate places. [2024-06-20 17:22:48,739 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 670 transitions, 11477 flow [2024-06-20 17:22:48,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:22:48,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:22:48,740 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:22:48,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-20 17:22:48,740 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:22:48,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:22:48,740 INFO L85 PathProgramCache]: Analyzing trace with hash 390827453, now seen corresponding path program 1 times [2024-06-20 17:22:48,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:22:48,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604390471] [2024-06-20 17:22:48,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:22:48,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:22:48,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:22:51,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:22:51,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:22:51,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604390471] [2024-06-20 17:22:51,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604390471] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:22:51,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:22:51,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:22:51,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896674841] [2024-06-20 17:22:51,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:22:51,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:22:51,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:22:51,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:22:51,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:22:51,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:22:51,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 670 transitions, 11477 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:22:51,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:22:51,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:22:51,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:22:53,949 INFO L124 PetriNetUnfolderBase]: 3398/5240 cut-off events. [2024-06-20 17:22:53,949 INFO L125 PetriNetUnfolderBase]: For 695199/695201 co-relation queries the response was YES. [2024-06-20 17:22:54,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57502 conditions, 5240 events. 3398/5240 cut-off events. For 695199/695201 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 29381 event pairs, 449 based on Foata normal form. 2/5235 useless extension candidates. Maximal degree in co-relation 57302. Up to 4965 conditions per place. [2024-06-20 17:22:54,192 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 671 selfloop transitions, 20 changer transitions 0/695 dead transitions. [2024-06-20 17:22:54,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 695 transitions, 13005 flow [2024-06-20 17:22:54,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:22:54,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:22:54,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-20 17:22:54,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3832752613240418 [2024-06-20 17:22:54,193 INFO L175 Difference]: Start difference. First operand has 436 places, 670 transitions, 11477 flow. Second operand 7 states and 110 transitions. [2024-06-20 17:22:54,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 695 transitions, 13005 flow [2024-06-20 17:22:56,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 695 transitions, 12942 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-20 17:22:56,961 INFO L231 Difference]: Finished difference. Result has 436 places, 672 transitions, 11547 flow [2024-06-20 17:22:56,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11414, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=670, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=650, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11547, PETRI_PLACES=436, PETRI_TRANSITIONS=672} [2024-06-20 17:22:56,961 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 394 predicate places. [2024-06-20 17:22:56,962 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 672 transitions, 11547 flow [2024-06-20 17:22:56,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:22:56,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:22:56,976 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:22:56,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-20 17:22:56,977 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:22:56,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:22:56,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1405701445, now seen corresponding path program 2 times [2024-06-20 17:22:56,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:22:56,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466116009] [2024-06-20 17:22:56,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:22:56,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:22:56,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:22:59,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:22:59,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:22:59,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466116009] [2024-06-20 17:22:59,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466116009] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:22:59,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:22:59,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:22:59,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795550670] [2024-06-20 17:22:59,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:22:59,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:22:59,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:22:59,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:22:59,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:22:59,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:22:59,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 672 transitions, 11547 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:22:59,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:22:59,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:22:59,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:23:01,683 INFO L124 PetriNetUnfolderBase]: 3406/5248 cut-off events. [2024-06-20 17:23:01,683 INFO L125 PetriNetUnfolderBase]: For 706401/706403 co-relation queries the response was YES. [2024-06-20 17:23:01,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57672 conditions, 5248 events. 3406/5248 cut-off events. For 706401/706403 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 29384 event pairs, 448 based on Foata normal form. 2/5243 useless extension candidates. Maximal degree in co-relation 57472. Up to 4962 conditions per place. [2024-06-20 17:23:01,773 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 654 selfloop transitions, 35 changer transitions 0/693 dead transitions. [2024-06-20 17:23:01,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 693 transitions, 13036 flow [2024-06-20 17:23:01,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:23:01,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:23:01,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 108 transitions. [2024-06-20 17:23:01,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37630662020905925 [2024-06-20 17:23:01,774 INFO L175 Difference]: Start difference. First operand has 436 places, 672 transitions, 11547 flow. Second operand 7 states and 108 transitions. [2024-06-20 17:23:01,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 693 transitions, 13036 flow [2024-06-20 17:23:04,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 693 transitions, 12917 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-06-20 17:23:04,253 INFO L231 Difference]: Finished difference. Result has 438 places, 674 transitions, 11568 flow [2024-06-20 17:23:04,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11428, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=672, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=637, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11568, PETRI_PLACES=438, PETRI_TRANSITIONS=674} [2024-06-20 17:23:04,253 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 396 predicate places. [2024-06-20 17:23:04,253 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 674 transitions, 11568 flow [2024-06-20 17:23:04,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:23:04,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:23:04,254 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:23:04,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-20 17:23:04,254 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:23:04,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:23:04,254 INFO L85 PathProgramCache]: Analyzing trace with hash 894426847, now seen corresponding path program 3 times [2024-06-20 17:23:04,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:23:04,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121115316] [2024-06-20 17:23:04,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:23:04,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:23:04,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:23:07,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:23:07,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:23:07,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121115316] [2024-06-20 17:23:07,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121115316] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:23:07,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:23:07,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:23:07,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97669813] [2024-06-20 17:23:07,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:23:07,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:23:07,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:23:07,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:23:07,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:23:07,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:23:07,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 674 transitions, 11568 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:23:07,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:23:07,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:23:07,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:23:09,777 INFO L124 PetriNetUnfolderBase]: 3414/5260 cut-off events. [2024-06-20 17:23:09,777 INFO L125 PetriNetUnfolderBase]: For 709191/709193 co-relation queries the response was YES. [2024-06-20 17:23:09,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57797 conditions, 5260 events. 3414/5260 cut-off events. For 709191/709193 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 29618 event pairs, 550 based on Foata normal form. 2/5255 useless extension candidates. Maximal degree in co-relation 57596. Up to 4931 conditions per place. [2024-06-20 17:23:09,867 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 659 selfloop transitions, 35 changer transitions 0/698 dead transitions. [2024-06-20 17:23:09,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 698 transitions, 13104 flow [2024-06-20 17:23:09,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:23:09,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:23:09,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-20 17:23:09,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-20 17:23:09,868 INFO L175 Difference]: Start difference. First operand has 438 places, 674 transitions, 11568 flow. Second operand 7 states and 112 transitions. [2024-06-20 17:23:09,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 698 transitions, 13104 flow [2024-06-20 17:23:12,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 698 transitions, 12987 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-20 17:23:12,569 INFO L231 Difference]: Finished difference. Result has 440 places, 676 transitions, 11619 flow [2024-06-20 17:23:12,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11451, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=674, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=639, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11619, PETRI_PLACES=440, PETRI_TRANSITIONS=676} [2024-06-20 17:23:12,570 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 398 predicate places. [2024-06-20 17:23:12,570 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 676 transitions, 11619 flow [2024-06-20 17:23:12,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:23:12,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:23:12,570 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:23:12,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-20 17:23:12,571 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:23:12,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:23:12,571 INFO L85 PathProgramCache]: Analyzing trace with hash -977062913, now seen corresponding path program 4 times [2024-06-20 17:23:12,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:23:12,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492754428] [2024-06-20 17:23:12,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:23:12,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:23:12,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:23:16,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:23:16,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:23:16,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492754428] [2024-06-20 17:23:16,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492754428] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:23:16,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:23:16,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:23:16,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322493004] [2024-06-20 17:23:16,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:23:16,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:23:16,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:23:16,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:23:16,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:23:16,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:23:16,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 676 transitions, 11619 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:23:16,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:23:16,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:23:16,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:23:18,532 INFO L124 PetriNetUnfolderBase]: 3450/5316 cut-off events. [2024-06-20 17:23:18,533 INFO L125 PetriNetUnfolderBase]: For 764066/764068 co-relation queries the response was YES. [2024-06-20 17:23:18,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58770 conditions, 5316 events. 3450/5316 cut-off events. For 764066/764068 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 30050 event pairs, 566 based on Foata normal form. 10/5319 useless extension candidates. Maximal degree in co-relation 58568. Up to 4892 conditions per place. [2024-06-20 17:23:18,624 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 631 selfloop transitions, 64 changer transitions 0/699 dead transitions. [2024-06-20 17:23:18,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 699 transitions, 13292 flow [2024-06-20 17:23:18,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:23:18,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:23:18,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-20 17:23:18,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40418118466898956 [2024-06-20 17:23:18,626 INFO L175 Difference]: Start difference. First operand has 440 places, 676 transitions, 11619 flow. Second operand 7 states and 116 transitions. [2024-06-20 17:23:18,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 699 transitions, 13292 flow [2024-06-20 17:23:21,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 699 transitions, 13142 flow, removed 42 selfloop flow, removed 5 redundant places. [2024-06-20 17:23:21,407 INFO L231 Difference]: Finished difference. Result has 442 places, 678 transitions, 11679 flow [2024-06-20 17:23:21,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11469, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=676, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=612, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11679, PETRI_PLACES=442, PETRI_TRANSITIONS=678} [2024-06-20 17:23:21,407 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 400 predicate places. [2024-06-20 17:23:21,408 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 678 transitions, 11679 flow [2024-06-20 17:23:21,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:23:21,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:23:21,408 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:23:21,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-20 17:23:21,408 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:23:21,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:23:21,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1017336577, now seen corresponding path program 5 times [2024-06-20 17:23:21,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:23:21,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586811476] [2024-06-20 17:23:21,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:23:21,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:23:21,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:23:24,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:23:24,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:23:24,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586811476] [2024-06-20 17:23:24,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586811476] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:23:24,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:23:24,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:23:24,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110618350] [2024-06-20 17:23:24,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:23:24,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:23:24,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:23:24,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:23:24,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:23:24,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:23:24,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 678 transitions, 11679 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:23:24,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:23:24,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:23:24,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:23:27,054 INFO L124 PetriNetUnfolderBase]: 3471/5347 cut-off events. [2024-06-20 17:23:27,054 INFO L125 PetriNetUnfolderBase]: For 749438/749440 co-relation queries the response was YES. [2024-06-20 17:23:27,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59453 conditions, 5347 events. 3471/5347 cut-off events. For 749438/749440 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 30257 event pairs, 529 based on Foata normal form. 2/5342 useless extension candidates. Maximal degree in co-relation 59250. Up to 4744 conditions per place. [2024-06-20 17:23:27,145 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 559 selfloop transitions, 147 changer transitions 0/710 dead transitions. [2024-06-20 17:23:27,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 710 transitions, 13611 flow [2024-06-20 17:23:27,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:23:27,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:23:27,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-20 17:23:27,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3932926829268293 [2024-06-20 17:23:27,147 INFO L175 Difference]: Start difference. First operand has 442 places, 678 transitions, 11679 flow. Second operand 8 states and 129 transitions. [2024-06-20 17:23:27,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 710 transitions, 13611 flow [2024-06-20 17:23:30,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 710 transitions, 13492 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-20 17:23:30,179 INFO L231 Difference]: Finished difference. Result has 446 places, 687 transitions, 12202 flow [2024-06-20 17:23:30,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11560, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=678, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=533, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12202, PETRI_PLACES=446, PETRI_TRANSITIONS=687} [2024-06-20 17:23:30,179 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 404 predicate places. [2024-06-20 17:23:30,180 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 687 transitions, 12202 flow [2024-06-20 17:23:30,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:23:30,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:23:30,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:23:30,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-20 17:23:30,180 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:23:30,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:23:30,181 INFO L85 PathProgramCache]: Analyzing trace with hash -351084325, now seen corresponding path program 6 times [2024-06-20 17:23:30,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:23:30,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926574531] [2024-06-20 17:23:30,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:23:30,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:23:30,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:23:33,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:23:33,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:23:33,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926574531] [2024-06-20 17:23:33,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926574531] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:23:33,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:23:33,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:23:33,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746668199] [2024-06-20 17:23:33,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:23:33,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:23:33,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:23:33,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:23:33,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:23:33,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:23:33,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 687 transitions, 12202 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:23:33,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:23:33,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:23:33,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:23:35,178 INFO L124 PetriNetUnfolderBase]: 3466/5340 cut-off events. [2024-06-20 17:23:35,179 INFO L125 PetriNetUnfolderBase]: For 754115/754117 co-relation queries the response was YES. [2024-06-20 17:23:35,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60216 conditions, 5340 events. 3466/5340 cut-off events. For 754115/754117 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 30169 event pairs, 566 based on Foata normal form. 2/5335 useless extension candidates. Maximal degree in co-relation 60011. Up to 5108 conditions per place. [2024-06-20 17:23:35,272 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 662 selfloop transitions, 36 changer transitions 0/702 dead transitions. [2024-06-20 17:23:35,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 702 transitions, 13672 flow [2024-06-20 17:23:35,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:23:35,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:23:35,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 104 transitions. [2024-06-20 17:23:35,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3623693379790941 [2024-06-20 17:23:35,274 INFO L175 Difference]: Start difference. First operand has 446 places, 687 transitions, 12202 flow. Second operand 7 states and 104 transitions. [2024-06-20 17:23:35,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 702 transitions, 13672 flow [2024-06-20 17:23:38,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 702 transitions, 13549 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-20 17:23:38,575 INFO L231 Difference]: Finished difference. Result has 449 places, 688 transitions, 12196 flow [2024-06-20 17:23:38,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12079, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=687, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=651, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12196, PETRI_PLACES=449, PETRI_TRANSITIONS=688} [2024-06-20 17:23:38,576 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 407 predicate places. [2024-06-20 17:23:38,576 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 688 transitions, 12196 flow [2024-06-20 17:23:38,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:23:38,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:23:38,576 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:23:38,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-20 17:23:38,577 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:23:38,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:23:38,578 INFO L85 PathProgramCache]: Analyzing trace with hash 503504691, now seen corresponding path program 1 times [2024-06-20 17:23:38,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:23:38,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472831879] [2024-06-20 17:23:38,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:23:38,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:23:38,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:23:42,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:23:42,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:23:42,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472831879] [2024-06-20 17:23:42,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472831879] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:23:42,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:23:42,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:23:42,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900653198] [2024-06-20 17:23:42,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:23:42,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:23:42,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:23:42,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:23:42,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:23:42,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:23:42,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 688 transitions, 12196 flow. Second operand has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 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) [2024-06-20 17:23:42,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:23:42,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:23:42,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:23:44,422 INFO L124 PetriNetUnfolderBase]: 3540/5454 cut-off events. [2024-06-20 17:23:44,423 INFO L125 PetriNetUnfolderBase]: For 842736/842738 co-relation queries the response was YES. [2024-06-20 17:23:44,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62768 conditions, 5454 events. 3540/5454 cut-off events. For 842736/842738 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 30960 event pairs, 515 based on Foata normal form. 8/5455 useless extension candidates. Maximal degree in co-relation 62561. Up to 4618 conditions per place. [2024-06-20 17:23:44,527 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 646 selfloop transitions, 74 changer transitions 0/724 dead transitions. [2024-06-20 17:23:44,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 456 places, 724 transitions, 14250 flow [2024-06-20 17:23:44,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:23:44,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:23:44,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-20 17:23:44,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-20 17:23:44,529 INFO L175 Difference]: Start difference. First operand has 449 places, 688 transitions, 12196 flow. Second operand 8 states and 140 transitions. [2024-06-20 17:23:44,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 456 places, 724 transitions, 14250 flow [2024-06-20 17:23:47,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 724 transitions, 14127 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-20 17:23:47,910 INFO L231 Difference]: Finished difference. Result has 452 places, 690 transitions, 12317 flow [2024-06-20 17:23:47,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12073, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=688, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=615, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12317, PETRI_PLACES=452, PETRI_TRANSITIONS=690} [2024-06-20 17:23:47,911 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 410 predicate places. [2024-06-20 17:23:47,911 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 690 transitions, 12317 flow [2024-06-20 17:23:47,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 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) [2024-06-20 17:23:47,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:23:47,912 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:23:47,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-20 17:23:47,912 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:23:47,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:23:47,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1989272945, now seen corresponding path program 1 times [2024-06-20 17:23:47,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:23:47,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153586227] [2024-06-20 17:23:47,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:23:47,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:23:47,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:23:51,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:23:51,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:23:51,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153586227] [2024-06-20 17:23:51,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153586227] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:23:51,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:23:51,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:23:51,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897522078] [2024-06-20 17:23:51,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:23:51,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:23:51,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:23:51,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:23:51,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:23:51,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:23:51,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 690 transitions, 12317 flow. Second operand has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 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) [2024-06-20 17:23:51,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:23:51,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:23:51,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:23:53,758 INFO L124 PetriNetUnfolderBase]: 3715/5701 cut-off events. [2024-06-20 17:23:53,758 INFO L125 PetriNetUnfolderBase]: For 835102/835104 co-relation queries the response was YES. [2024-06-20 17:23:53,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65901 conditions, 5701 events. 3715/5701 cut-off events. For 835102/835104 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 32485 event pairs, 583 based on Foata normal form. 2/5696 useless extension candidates. Maximal degree in co-relation 65693. Up to 5210 conditions per place. [2024-06-20 17:23:53,860 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 622 selfloop transitions, 166 changer transitions 0/792 dead transitions. [2024-06-20 17:23:53,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 792 transitions, 15765 flow [2024-06-20 17:23:53,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:23:53,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:23:53,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-20 17:23:53,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4092140921409214 [2024-06-20 17:23:53,862 INFO L175 Difference]: Start difference. First operand has 452 places, 690 transitions, 12317 flow. Second operand 9 states and 151 transitions. [2024-06-20 17:23:53,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 792 transitions, 15765 flow [2024-06-20 17:23:57,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 792 transitions, 15670 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-20 17:23:57,555 INFO L231 Difference]: Finished difference. Result has 459 places, 763 transitions, 14578 flow [2024-06-20 17:23:57,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12222, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=690, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=524, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14578, PETRI_PLACES=459, PETRI_TRANSITIONS=763} [2024-06-20 17:23:57,556 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 417 predicate places. [2024-06-20 17:23:57,556 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 763 transitions, 14578 flow [2024-06-20 17:23:57,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 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) [2024-06-20 17:23:57,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:23:57,556 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:23:57,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-20 17:23:57,556 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:23:57,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:23:57,557 INFO L85 PathProgramCache]: Analyzing trace with hash 1989272821, now seen corresponding path program 2 times [2024-06-20 17:23:57,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:23:57,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611836045] [2024-06-20 17:23:57,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:23:57,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:23:57,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:24:00,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:24:00,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:24:00,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611836045] [2024-06-20 17:24:00,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611836045] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:24:00,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:24:00,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:24:00,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077867107] [2024-06-20 17:24:00,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:24:00,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:24:00,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:24:00,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:24:00,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:24:00,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:24:00,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 763 transitions, 14578 flow. Second operand has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 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) [2024-06-20 17:24:00,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:24:00,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:24:00,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:24:03,330 INFO L124 PetriNetUnfolderBase]: 3697/5677 cut-off events. [2024-06-20 17:24:03,330 INFO L125 PetriNetUnfolderBase]: For 834481/834483 co-relation queries the response was YES. [2024-06-20 17:24:03,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65966 conditions, 5677 events. 3697/5677 cut-off events. For 834481/834483 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 32364 event pairs, 585 based on Foata normal form. 8/5678 useless extension candidates. Maximal degree in co-relation 65754. Up to 5246 conditions per place. [2024-06-20 17:24:03,434 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 681 selfloop transitions, 104 changer transitions 0/789 dead transitions. [2024-06-20 17:24:03,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 789 transitions, 16340 flow [2024-06-20 17:24:03,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:24:03,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:24:03,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-20 17:24:03,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3956639566395664 [2024-06-20 17:24:03,435 INFO L175 Difference]: Start difference. First operand has 459 places, 763 transitions, 14578 flow. Second operand 9 states and 146 transitions. [2024-06-20 17:24:03,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 789 transitions, 16340 flow [2024-06-20 17:24:06,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 789 transitions, 16012 flow, removed 85 selfloop flow, removed 5 redundant places. [2024-06-20 17:24:06,840 INFO L231 Difference]: Finished difference. Result has 463 places, 763 transitions, 14471 flow [2024-06-20 17:24:06,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14250, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=763, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=659, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14471, PETRI_PLACES=463, PETRI_TRANSITIONS=763} [2024-06-20 17:24:06,841 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 421 predicate places. [2024-06-20 17:24:06,841 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 763 transitions, 14471 flow [2024-06-20 17:24:06,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 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) [2024-06-20 17:24:06,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:24:06,841 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:24:06,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-20 17:24:06,842 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:24:06,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:24:06,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1161531097, now seen corresponding path program 2 times [2024-06-20 17:24:06,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:24:06,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721748978] [2024-06-20 17:24:06,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:24:06,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:24:06,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:24:11,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:24:11,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:24:11,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721748978] [2024-06-20 17:24:11,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721748978] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:24:11,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:24:11,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:24:11,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498973797] [2024-06-20 17:24:11,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:24:11,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:24:11,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:24:11,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:24:11,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:24:11,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:24:11,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 763 transitions, 14471 flow. Second operand has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 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) [2024-06-20 17:24:11,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:24:11,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:24:11,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:24:13,269 INFO L124 PetriNetUnfolderBase]: 3707/5695 cut-off events. [2024-06-20 17:24:13,269 INFO L125 PetriNetUnfolderBase]: For 807802/807804 co-relation queries the response was YES. [2024-06-20 17:24:13,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65952 conditions, 5695 events. 3707/5695 cut-off events. For 807802/807804 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 32530 event pairs, 560 based on Foata normal form. 2/5690 useless extension candidates. Maximal degree in co-relation 65740. Up to 5374 conditions per place. [2024-06-20 17:24:13,372 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 726 selfloop transitions, 55 changer transitions 0/785 dead transitions. [2024-06-20 17:24:13,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 785 transitions, 16297 flow [2024-06-20 17:24:13,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:24:13,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:24:13,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-20 17:24:13,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3871951219512195 [2024-06-20 17:24:13,374 INFO L175 Difference]: Start difference. First operand has 463 places, 763 transitions, 14471 flow. Second operand 8 states and 127 transitions. [2024-06-20 17:24:13,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 785 transitions, 16297 flow [2024-06-20 17:24:16,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 463 places, 785 transitions, 16100 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-20 17:24:16,646 INFO L231 Difference]: Finished difference. Result has 464 places, 766 transitions, 14595 flow [2024-06-20 17:24:16,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14274, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=763, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=708, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=14595, PETRI_PLACES=464, PETRI_TRANSITIONS=766} [2024-06-20 17:24:16,647 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 422 predicate places. [2024-06-20 17:24:16,647 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 766 transitions, 14595 flow [2024-06-20 17:24:16,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 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) [2024-06-20 17:24:16,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:24:16,648 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:24:16,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-20 17:24:16,648 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:24:16,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:24:16,649 INFO L85 PathProgramCache]: Analyzing trace with hash 63362235, now seen corresponding path program 3 times [2024-06-20 17:24:16,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:24:16,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960039818] [2024-06-20 17:24:16,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:24:16,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:24:16,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:24:20,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:24:20,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:24:20,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960039818] [2024-06-20 17:24:20,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960039818] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:24:20,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:24:20,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:24:20,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219290819] [2024-06-20 17:24:20,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:24:20,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:24:20,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:24:20,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:24:20,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:24:21,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:24:21,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 766 transitions, 14595 flow. Second operand has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 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) [2024-06-20 17:24:21,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:24:21,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:24:21,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:24:23,813 INFO L124 PetriNetUnfolderBase]: 3717/5709 cut-off events. [2024-06-20 17:24:23,813 INFO L125 PetriNetUnfolderBase]: For 833641/833643 co-relation queries the response was YES. [2024-06-20 17:24:23,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66750 conditions, 5709 events. 3717/5709 cut-off events. For 833641/833643 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 32593 event pairs, 554 based on Foata normal form. 2/5704 useless extension candidates. Maximal degree in co-relation 66537. Up to 5352 conditions per place. [2024-06-20 17:24:23,905 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 710 selfloop transitions, 75 changer transitions 0/789 dead transitions. [2024-06-20 17:24:23,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 789 transitions, 16437 flow [2024-06-20 17:24:23,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:24:23,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:24:23,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-20 17:24:23,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3794037940379404 [2024-06-20 17:24:23,907 INFO L175 Difference]: Start difference. First operand has 464 places, 766 transitions, 14595 flow. Second operand 9 states and 140 transitions. [2024-06-20 17:24:23,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 789 transitions, 16437 flow [2024-06-20 17:24:27,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 789 transitions, 16186 flow, removed 77 selfloop flow, removed 6 redundant places. [2024-06-20 17:24:27,102 INFO L231 Difference]: Finished difference. Result has 467 places, 769 transitions, 14724 flow [2024-06-20 17:24:27,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14344, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=766, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=691, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14724, PETRI_PLACES=467, PETRI_TRANSITIONS=769} [2024-06-20 17:24:27,103 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 425 predicate places. [2024-06-20 17:24:27,103 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 769 transitions, 14724 flow [2024-06-20 17:24:27,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 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) [2024-06-20 17:24:27,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:24:27,103 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:24:27,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-20 17:24:27,103 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:24:27,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:24:27,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1826835093, now seen corresponding path program 7 times [2024-06-20 17:24:27,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:24:27,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845429822] [2024-06-20 17:24:27,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:24:27,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:24:27,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:24:30,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:24:30,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:24:30,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845429822] [2024-06-20 17:24:30,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845429822] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:24:30,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:24:30,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:24:30,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342909873] [2024-06-20 17:24:30,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:24:30,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:24:30,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:24:30,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:24:30,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:24:30,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:24:30,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 769 transitions, 14724 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:24:30,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:24:30,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:24:30,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:24:32,909 INFO L124 PetriNetUnfolderBase]: 3740/5751 cut-off events. [2024-06-20 17:24:32,910 INFO L125 PetriNetUnfolderBase]: For 888950/888960 co-relation queries the response was YES. [2024-06-20 17:24:32,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67531 conditions, 5751 events. 3740/5751 cut-off events. For 888950/888960 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 32899 event pairs, 575 based on Foata normal form. 18/5765 useless extension candidates. Maximal degree in co-relation 67317. Up to 5410 conditions per place. [2024-06-20 17:24:33,004 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 721 selfloop transitions, 69 changer transitions 0/794 dead transitions. [2024-06-20 17:24:33,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 794 transitions, 16600 flow [2024-06-20 17:24:33,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:24:33,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:24:33,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-20 17:24:33,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38109756097560976 [2024-06-20 17:24:33,005 INFO L175 Difference]: Start difference. First operand has 467 places, 769 transitions, 14724 flow. Second operand 8 states and 125 transitions. [2024-06-20 17:24:33,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 794 transitions, 16600 flow [2024-06-20 17:24:36,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 794 transitions, 16299 flow, removed 83 selfloop flow, removed 7 redundant places. [2024-06-20 17:24:36,051 INFO L231 Difference]: Finished difference. Result has 468 places, 771 transitions, 14678 flow [2024-06-20 17:24:36,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14427, PETRI_DIFFERENCE_MINUEND_PLACES=460, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=769, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=700, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=14678, PETRI_PLACES=468, PETRI_TRANSITIONS=771} [2024-06-20 17:24:36,052 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 426 predicate places. [2024-06-20 17:24:36,052 INFO L495 AbstractCegarLoop]: Abstraction has has 468 places, 771 transitions, 14678 flow [2024-06-20 17:24:36,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:24:36,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:24:36,052 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:24:36,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-20 17:24:36,053 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:24:36,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:24:36,053 INFO L85 PathProgramCache]: Analyzing trace with hash -1915485173, now seen corresponding path program 3 times [2024-06-20 17:24:36,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:24:36,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639282584] [2024-06-20 17:24:36,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:24:36,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:24:36,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:24:39,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:24:39,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:24:39,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639282584] [2024-06-20 17:24:39,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639282584] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:24:39,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:24:39,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:24:39,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912522129] [2024-06-20 17:24:39,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:24:39,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:24:39,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:24:39,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:24:39,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:24:40,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:24:40,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 771 transitions, 14678 flow. Second operand has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 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) [2024-06-20 17:24:40,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:24:40,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:24:40,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:24:42,493 INFO L124 PetriNetUnfolderBase]: 3839/5903 cut-off events. [2024-06-20 17:24:42,494 INFO L125 PetriNetUnfolderBase]: For 941252/941254 co-relation queries the response was YES. [2024-06-20 17:24:42,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70622 conditions, 5903 events. 3839/5903 cut-off events. For 941252/941254 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 33929 event pairs, 533 based on Foata normal form. 6/5902 useless extension candidates. Maximal degree in co-relation 70407. Up to 4762 conditions per place. [2024-06-20 17:24:42,591 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 695 selfloop transitions, 117 changer transitions 0/816 dead transitions. [2024-06-20 17:24:42,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 476 places, 816 transitions, 17236 flow [2024-06-20 17:24:42,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:24:42,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:24:42,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-20 17:24:42,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4254742547425474 [2024-06-20 17:24:42,592 INFO L175 Difference]: Start difference. First operand has 468 places, 771 transitions, 14678 flow. Second operand 9 states and 157 transitions. [2024-06-20 17:24:42,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 476 places, 816 transitions, 17236 flow [2024-06-20 17:24:46,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 470 places, 816 transitions, 17063 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-20 17:24:46,413 INFO L231 Difference]: Finished difference. Result has 471 places, 774 transitions, 14883 flow [2024-06-20 17:24:46,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14505, PETRI_DIFFERENCE_MINUEND_PLACES=462, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=771, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=656, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14883, PETRI_PLACES=471, PETRI_TRANSITIONS=774} [2024-06-20 17:24:46,414 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 429 predicate places. [2024-06-20 17:24:46,414 INFO L495 AbstractCegarLoop]: Abstraction has has 471 places, 774 transitions, 14883 flow [2024-06-20 17:24:46,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 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) [2024-06-20 17:24:46,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:24:46,415 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:24:46,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-20 17:24:46,415 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:24:46,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:24:46,416 INFO L85 PathProgramCache]: Analyzing trace with hash -728357753, now seen corresponding path program 4 times [2024-06-20 17:24:46,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:24:46,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172593637] [2024-06-20 17:24:46,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:24:46,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:24:46,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:24:49,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:24:49,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:24:49,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172593637] [2024-06-20 17:24:49,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172593637] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:24:49,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:24:49,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:24:49,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321253573] [2024-06-20 17:24:49,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:24:49,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:24:49,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:24:49,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:24:49,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:24:49,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:24:49,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 774 transitions, 14883 flow. Second operand has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 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) [2024-06-20 17:24:49,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:24:49,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:24:49,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:24:52,506 INFO L124 PetriNetUnfolderBase]: 3867/5954 cut-off events. [2024-06-20 17:24:52,506 INFO L125 PetriNetUnfolderBase]: For 933944/933954 co-relation queries the response was YES. [2024-06-20 17:24:52,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71263 conditions, 5954 events. 3867/5954 cut-off events. For 933944/933954 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 34434 event pairs, 614 based on Foata normal form. 10/5960 useless extension candidates. Maximal degree in co-relation 71047. Up to 5717 conditions per place. [2024-06-20 17:24:52,610 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 781 selfloop transitions, 27 changer transitions 0/812 dead transitions. [2024-06-20 17:24:52,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 479 places, 812 transitions, 16793 flow [2024-06-20 17:24:52,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:24:52,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:24:52,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 137 transitions. [2024-06-20 17:24:52,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3712737127371274 [2024-06-20 17:24:52,612 INFO L175 Difference]: Start difference. First operand has 471 places, 774 transitions, 14883 flow. Second operand 9 states and 137 transitions. [2024-06-20 17:24:52,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 479 places, 812 transitions, 16793 flow [2024-06-20 17:24:56,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 812 transitions, 16623 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-20 17:24:56,395 INFO L231 Difference]: Finished difference. Result has 478 places, 783 transitions, 14995 flow [2024-06-20 17:24:56,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14716, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=774, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=747, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14995, PETRI_PLACES=478, PETRI_TRANSITIONS=783} [2024-06-20 17:24:56,395 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 436 predicate places. [2024-06-20 17:24:56,395 INFO L495 AbstractCegarLoop]: Abstraction has has 478 places, 783 transitions, 14995 flow [2024-06-20 17:24:56,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 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) [2024-06-20 17:24:56,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:24:56,396 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:24:56,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-20 17:24:56,396 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:24:56,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:24:56,396 INFO L85 PathProgramCache]: Analyzing trace with hash -555659667, now seen corresponding path program 4 times [2024-06-20 17:24:56,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:24:56,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778144609] [2024-06-20 17:24:56,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:24:56,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:24:56,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:24:59,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:24:59,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:24:59,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778144609] [2024-06-20 17:24:59,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778144609] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:24:59,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:24:59,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:24:59,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279487382] [2024-06-20 17:24:59,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:24:59,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:24:59,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:24:59,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:24:59,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:24:59,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:24:59,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 478 places, 783 transitions, 14995 flow. Second operand has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 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) [2024-06-20 17:24:59,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:24:59,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:24:59,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:25:02,432 INFO L124 PetriNetUnfolderBase]: 3979/6119 cut-off events. [2024-06-20 17:25:02,432 INFO L125 PetriNetUnfolderBase]: For 1063063/1063065 co-relation queries the response was YES. [2024-06-20 17:25:02,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75527 conditions, 6119 events. 3979/6119 cut-off events. For 1063063/1063065 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 35312 event pairs, 567 based on Foata normal form. 6/6118 useless extension candidates. Maximal degree in co-relation 75307. Up to 4607 conditions per place. [2024-06-20 17:25:02,538 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 675 selfloop transitions, 146 changer transitions 0/825 dead transitions. [2024-06-20 17:25:02,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 825 transitions, 17631 flow [2024-06-20 17:25:02,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:25:02,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:25:02,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-20 17:25:02,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42005420054200543 [2024-06-20 17:25:02,539 INFO L175 Difference]: Start difference. First operand has 478 places, 783 transitions, 14995 flow. Second operand 9 states and 155 transitions. [2024-06-20 17:25:02,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 825 transitions, 17631 flow [2024-06-20 17:25:06,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 481 places, 825 transitions, 17474 flow, removed 53 selfloop flow, removed 5 redundant places. [2024-06-20 17:25:06,805 INFO L231 Difference]: Finished difference. Result has 482 places, 786 transitions, 15280 flow [2024-06-20 17:25:06,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14838, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=783, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=639, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15280, PETRI_PLACES=482, PETRI_TRANSITIONS=786} [2024-06-20 17:25:06,806 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 440 predicate places. [2024-06-20 17:25:06,806 INFO L495 AbstractCegarLoop]: Abstraction has has 482 places, 786 transitions, 15280 flow [2024-06-20 17:25:06,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 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) [2024-06-20 17:25:06,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:25:06,807 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:25:06,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-20 17:25:06,808 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:25:06,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:25:06,809 INFO L85 PathProgramCache]: Analyzing trace with hash -555659326, now seen corresponding path program 1 times [2024-06-20 17:25:06,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:25:06,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007869807] [2024-06-20 17:25:06,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:25:06,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:25:06,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:25:09,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:25:09,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:25:09,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007869807] [2024-06-20 17:25:09,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007869807] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:25:09,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:25:09,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:25:09,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946237381] [2024-06-20 17:25:09,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:25:09,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:25:09,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:25:09,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:25:09,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:25:09,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:25:09,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 482 places, 786 transitions, 15280 flow. Second operand has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 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) [2024-06-20 17:25:09,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:25:09,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:25:09,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:25:12,481 INFO L124 PetriNetUnfolderBase]: 4110/6333 cut-off events. [2024-06-20 17:25:12,481 INFO L125 PetriNetUnfolderBase]: For 1159355/1159365 co-relation queries the response was YES. [2024-06-20 17:25:12,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79309 conditions, 6333 events. 4110/6333 cut-off events. For 1159355/1159365 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 37075 event pairs, 607 based on Foata normal form. 16/6345 useless extension candidates. Maximal degree in co-relation 79088. Up to 5434 conditions per place. [2024-06-20 17:25:12,808 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 679 selfloop transitions, 156 changer transitions 0/839 dead transitions. [2024-06-20 17:25:12,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 491 places, 839 transitions, 17704 flow [2024-06-20 17:25:12,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:25:12,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:25:12,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 168 transitions. [2024-06-20 17:25:12,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4097560975609756 [2024-06-20 17:25:12,810 INFO L175 Difference]: Start difference. First operand has 482 places, 786 transitions, 15280 flow. Second operand 10 states and 168 transitions. [2024-06-20 17:25:12,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 491 places, 839 transitions, 17704 flow [2024-06-20 17:25:17,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 487 places, 839 transitions, 17519 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-20 17:25:17,607 INFO L231 Difference]: Finished difference. Result has 490 places, 794 transitions, 15645 flow [2024-06-20 17:25:17,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=15095, PETRI_DIFFERENCE_MINUEND_PLACES=478, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=786, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=631, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=15645, PETRI_PLACES=490, PETRI_TRANSITIONS=794} [2024-06-20 17:25:17,609 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 448 predicate places. [2024-06-20 17:25:17,609 INFO L495 AbstractCegarLoop]: Abstraction has has 490 places, 794 transitions, 15645 flow [2024-06-20 17:25:17,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 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) [2024-06-20 17:25:17,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:25:17,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:25:17,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-20 17:25:17,609 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:25:17,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:25:17,610 INFO L85 PathProgramCache]: Analyzing trace with hash -562126887, now seen corresponding path program 5 times [2024-06-20 17:25:17,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:25:17,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923531855] [2024-06-20 17:25:17,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:25:17,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:25:17,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:25:21,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:25:21,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:25:21,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923531855] [2024-06-20 17:25:21,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923531855] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:25:21,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:25:21,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:25:21,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108796457] [2024-06-20 17:25:21,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:25:21,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:25:21,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:25:21,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:25:21,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:25:21,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:25:21,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 490 places, 794 transitions, 15645 flow. Second operand has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 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) [2024-06-20 17:25:21,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:25:21,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:25:21,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:25:24,138 INFO L124 PetriNetUnfolderBase]: 4171/6419 cut-off events. [2024-06-20 17:25:24,139 INFO L125 PetriNetUnfolderBase]: For 1224585/1224587 co-relation queries the response was YES. [2024-06-20 17:25:24,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82072 conditions, 6419 events. 4171/6419 cut-off events. For 1224585/1224587 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 37603 event pairs, 709 based on Foata normal form. 8/6420 useless extension candidates. Maximal degree in co-relation 81847. Up to 5642 conditions per place. [2024-06-20 17:25:24,252 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 693 selfloop transitions, 138 changer transitions 0/835 dead transitions. [2024-06-20 17:25:24,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 498 places, 835 transitions, 17975 flow [2024-06-20 17:25:24,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:25:24,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:25:24,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-20 17:25:24,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4173441734417344 [2024-06-20 17:25:24,254 INFO L175 Difference]: Start difference. First operand has 490 places, 794 transitions, 15645 flow. Second operand 9 states and 154 transitions. [2024-06-20 17:25:24,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 498 places, 835 transitions, 17975 flow [2024-06-20 17:25:28,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 493 places, 835 transitions, 17783 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-20 17:25:28,797 INFO L231 Difference]: Finished difference. Result has 495 places, 796 transitions, 15844 flow [2024-06-20 17:25:28,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=15455, PETRI_DIFFERENCE_MINUEND_PLACES=485, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=794, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=656, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15844, PETRI_PLACES=495, PETRI_TRANSITIONS=796} [2024-06-20 17:25:28,798 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 453 predicate places. [2024-06-20 17:25:28,798 INFO L495 AbstractCegarLoop]: Abstraction has has 495 places, 796 transitions, 15844 flow [2024-06-20 17:25:28,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 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) [2024-06-20 17:25:28,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:25:28,798 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:25:28,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-20 17:25:28,798 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:25:28,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:25:28,799 INFO L85 PathProgramCache]: Analyzing trace with hash -51058575, now seen corresponding path program 5 times [2024-06-20 17:25:28,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:25:28,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456088668] [2024-06-20 17:25:28,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:25:28,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:25:28,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:25:32,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:25:32,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:25:32,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456088668] [2024-06-20 17:25:32,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456088668] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:25:32,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:25:32,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:25:32,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740633836] [2024-06-20 17:25:32,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:25:32,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:25:32,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:25:32,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:25:32,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:25:32,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:25:32,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 495 places, 796 transitions, 15844 flow. Second operand has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 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) [2024-06-20 17:25:32,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:25:32,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:25:32,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:25:35,612 INFO L124 PetriNetUnfolderBase]: 4244/6541 cut-off events. [2024-06-20 17:25:35,612 INFO L125 PetriNetUnfolderBase]: For 1231356/1231358 co-relation queries the response was YES. [2024-06-20 17:25:35,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84739 conditions, 6541 events. 4244/6541 cut-off events. For 1231356/1231358 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 38561 event pairs, 722 based on Foata normal form. 2/6536 useless extension candidates. Maximal degree in co-relation 84512. Up to 5733 conditions per place. [2024-06-20 17:25:35,736 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 581 selfloop transitions, 266 changer transitions 0/851 dead transitions. [2024-06-20 17:25:35,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 504 places, 851 transitions, 18946 flow [2024-06-20 17:25:35,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:25:35,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:25:35,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-20 17:25:35,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4073170731707317 [2024-06-20 17:25:35,738 INFO L175 Difference]: Start difference. First operand has 495 places, 796 transitions, 15844 flow. Second operand 10 states and 167 transitions. [2024-06-20 17:25:35,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 504 places, 851 transitions, 18946 flow [2024-06-20 17:25:40,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 497 places, 851 transitions, 18642 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-20 17:25:40,703 INFO L231 Difference]: Finished difference. Result has 501 places, 816 transitions, 17088 flow [2024-06-20 17:25:40,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=15550, PETRI_DIFFERENCE_MINUEND_PLACES=488, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=796, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=249, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=536, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=17088, PETRI_PLACES=501, PETRI_TRANSITIONS=816} [2024-06-20 17:25:40,704 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 459 predicate places. [2024-06-20 17:25:40,704 INFO L495 AbstractCegarLoop]: Abstraction has has 501 places, 816 transitions, 17088 flow [2024-06-20 17:25:40,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 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) [2024-06-20 17:25:40,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:25:40,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:25:40,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-20 17:25:40,705 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:25:40,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:25:40,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1718121791, now seen corresponding path program 6 times [2024-06-20 17:25:40,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:25:40,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426252582] [2024-06-20 17:25:40,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:25:40,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:25:40,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:25:43,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:25:43,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:25:43,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426252582] [2024-06-20 17:25:43,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426252582] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:25:43,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:25:43,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:25:43,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864097318] [2024-06-20 17:25:43,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:25:43,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:25:43,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:25:43,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:25:43,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:25:43,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:25:43,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 501 places, 816 transitions, 17088 flow. Second operand has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 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) [2024-06-20 17:25:43,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:25:43,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:25:43,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:25:46,898 INFO L124 PetriNetUnfolderBase]: 4272/6577 cut-off events. [2024-06-20 17:25:46,899 INFO L125 PetriNetUnfolderBase]: For 1303482/1303484 co-relation queries the response was YES. [2024-06-20 17:25:46,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86516 conditions, 6577 events. 4272/6577 cut-off events. For 1303482/1303484 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 38787 event pairs, 735 based on Foata normal form. 8/6578 useless extension candidates. Maximal degree in co-relation 86285. Up to 6003 conditions per place. [2024-06-20 17:25:47,023 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 699 selfloop transitions, 144 changer transitions 0/847 dead transitions. [2024-06-20 17:25:47,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 509 places, 847 transitions, 19030 flow [2024-06-20 17:25:47,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:25:47,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:25:47,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-20 17:25:47,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3956639566395664 [2024-06-20 17:25:47,024 INFO L175 Difference]: Start difference. First operand has 501 places, 816 transitions, 17088 flow. Second operand 9 states and 146 transitions. [2024-06-20 17:25:47,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 509 places, 847 transitions, 19030 flow [2024-06-20 17:25:52,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 505 places, 847 transitions, 18537 flow, removed 149 selfloop flow, removed 4 redundant places. [2024-06-20 17:25:52,086 INFO L231 Difference]: Finished difference. Result has 506 places, 817 transitions, 16936 flow [2024-06-20 17:25:52,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=16595, PETRI_DIFFERENCE_MINUEND_PLACES=497, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=816, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=672, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=16936, PETRI_PLACES=506, PETRI_TRANSITIONS=817} [2024-06-20 17:25:52,087 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 464 predicate places. [2024-06-20 17:25:52,087 INFO L495 AbstractCegarLoop]: Abstraction has has 506 places, 817 transitions, 16936 flow [2024-06-20 17:25:52,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 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) [2024-06-20 17:25:52,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:25:52,087 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:25:52,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-20 17:25:52,088 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:25:52,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:25:52,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1726464015, now seen corresponding path program 6 times [2024-06-20 17:25:52,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:25:52,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635170664] [2024-06-20 17:25:52,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:25:52,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:25:52,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:25:55,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:25:55,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:25:55,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635170664] [2024-06-20 17:25:55,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635170664] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:25:55,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:25:55,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:25:55,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112648492] [2024-06-20 17:25:55,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:25:55,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:25:55,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:25:55,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:25:55,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:25:55,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:25:55,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 506 places, 817 transitions, 16936 flow. Second operand has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 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) [2024-06-20 17:25:55,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:25:55,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:25:55,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:25:58,560 INFO L124 PetriNetUnfolderBase]: 4303/6630 cut-off events. [2024-06-20 17:25:58,561 INFO L125 PetriNetUnfolderBase]: For 1298927/1298929 co-relation queries the response was YES. [2024-06-20 17:25:58,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87710 conditions, 6630 events. 4303/6630 cut-off events. For 1298927/1298929 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 39163 event pairs, 722 based on Foata normal form. 2/6625 useless extension candidates. Maximal degree in co-relation 87477. Up to 5764 conditions per place. [2024-06-20 17:25:58,682 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 566 selfloop transitions, 287 changer transitions 0/857 dead transitions. [2024-06-20 17:25:58,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 515 places, 857 transitions, 19657 flow [2024-06-20 17:25:58,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:25:58,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:25:58,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 165 transitions. [2024-06-20 17:25:58,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-20 17:25:58,683 INFO L175 Difference]: Start difference. First operand has 506 places, 817 transitions, 16936 flow. Second operand 10 states and 165 transitions. [2024-06-20 17:25:58,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 515 places, 857 transitions, 19657 flow [2024-06-20 17:26:03,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 508 places, 857 transitions, 19352 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-20 17:26:03,898 INFO L231 Difference]: Finished difference. Result has 510 places, 826 transitions, 17679 flow [2024-06-20 17:26:03,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=16639, PETRI_DIFFERENCE_MINUEND_PLACES=499, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=817, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=281, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=533, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=17679, PETRI_PLACES=510, PETRI_TRANSITIONS=826} [2024-06-20 17:26:03,898 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 468 predicate places. [2024-06-20 17:26:03,898 INFO L495 AbstractCegarLoop]: Abstraction has has 510 places, 826 transitions, 17679 flow [2024-06-20 17:26:03,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 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) [2024-06-20 17:26:03,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:26:03,899 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:26:03,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-20 17:26:03,899 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:26:03,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:26:03,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1913338392, now seen corresponding path program 2 times [2024-06-20 17:26:03,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:26:03,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075309991] [2024-06-20 17:26:03,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:26:03,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:26:03,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:26:06,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:26:06,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:26:06,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075309991] [2024-06-20 17:26:06,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075309991] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:26:06,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:26:06,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:26:06,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231566570] [2024-06-20 17:26:06,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:26:06,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:26:06,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:26:06,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:26:06,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:26:06,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:26:06,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 510 places, 826 transitions, 17679 flow. Second operand has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 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) [2024-06-20 17:26:06,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:26:06,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:26:06,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:26:09,988 INFO L124 PetriNetUnfolderBase]: 4339/6689 cut-off events. [2024-06-20 17:26:09,988 INFO L125 PetriNetUnfolderBase]: For 1381337/1381347 co-relation queries the response was YES. [2024-06-20 17:26:10,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89505 conditions, 6689 events. 4339/6689 cut-off events. For 1381337/1381347 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 39554 event pairs, 715 based on Foata normal form. 18/6703 useless extension candidates. Maximal degree in co-relation 89270. Up to 6157 conditions per place. [2024-06-20 17:26:10,127 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 715 selfloop transitions, 142 changer transitions 0/861 dead transitions. [2024-06-20 17:26:10,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 519 places, 861 transitions, 19714 flow [2024-06-20 17:26:10,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:26:10,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:26:10,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 160 transitions. [2024-06-20 17:26:10,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-20 17:26:10,128 INFO L175 Difference]: Start difference. First operand has 510 places, 826 transitions, 17679 flow. Second operand 10 states and 160 transitions. [2024-06-20 17:26:10,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 519 places, 861 transitions, 19714 flow [2024-06-20 17:26:15,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 514 places, 861 transitions, 19120 flow, removed 133 selfloop flow, removed 5 redundant places. [2024-06-20 17:26:15,694 INFO L231 Difference]: Finished difference. Result has 515 places, 827 transitions, 17430 flow [2024-06-20 17:26:15,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=17089, PETRI_DIFFERENCE_MINUEND_PLACES=505, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=826, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=684, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=17430, PETRI_PLACES=515, PETRI_TRANSITIONS=827} [2024-06-20 17:26:15,694 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 473 predicate places. [2024-06-20 17:26:15,694 INFO L495 AbstractCegarLoop]: Abstraction has has 515 places, 827 transitions, 17430 flow [2024-06-20 17:26:15,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 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) [2024-06-20 17:26:15,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:26:15,694 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:26:15,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-20 17:26:15,695 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:26:15,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:26:15,695 INFO L85 PathProgramCache]: Analyzing trace with hash -553785717, now seen corresponding path program 7 times [2024-06-20 17:26:15,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:26:15,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490910417] [2024-06-20 17:26:15,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:26:15,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:26:15,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:26:19,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:26:19,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:26:19,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490910417] [2024-06-20 17:26:19,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490910417] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:26:19,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:26:19,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:26:19,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332142950] [2024-06-20 17:26:19,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:26:19,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:26:19,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:26:19,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:26:19,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:26:19,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:26:19,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 515 places, 827 transitions, 17430 flow. Second operand has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 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) [2024-06-20 17:26:19,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:26:19,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:26:19,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:26:22,793 INFO L124 PetriNetUnfolderBase]: 4326/6664 cut-off events. [2024-06-20 17:26:22,793 INFO L125 PetriNetUnfolderBase]: For 1317992/1318002 co-relation queries the response was YES. [2024-06-20 17:26:22,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88068 conditions, 6664 events. 4326/6664 cut-off events. For 1317992/1318002 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 39354 event pairs, 714 based on Foata normal form. 14/6674 useless extension candidates. Maximal degree in co-relation 87831. Up to 6098 conditions per place. [2024-06-20 17:26:22,926 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 778 selfloop transitions, 77 changer transitions 0/859 dead transitions. [2024-06-20 17:26:22,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 523 places, 859 transitions, 19658 flow [2024-06-20 17:26:22,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:26:22,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:26:22,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-20 17:26:22,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875338753387534 [2024-06-20 17:26:22,927 INFO L175 Difference]: Start difference. First operand has 515 places, 827 transitions, 17430 flow. Second operand 9 states and 143 transitions. [2024-06-20 17:26:22,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 523 places, 859 transitions, 19658 flow [2024-06-20 17:26:27,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 515 places, 859 transitions, 19374 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-20 17:26:27,908 INFO L231 Difference]: Finished difference. Result has 516 places, 827 transitions, 17305 flow [2024-06-20 17:26:27,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=17146, PETRI_DIFFERENCE_MINUEND_PLACES=507, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=827, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=750, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=17305, PETRI_PLACES=516, PETRI_TRANSITIONS=827} [2024-06-20 17:26:27,909 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 474 predicate places. [2024-06-20 17:26:27,909 INFO L495 AbstractCegarLoop]: Abstraction has has 516 places, 827 transitions, 17305 flow [2024-06-20 17:26:27,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 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) [2024-06-20 17:26:27,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:26:27,909 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:26:27,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-20 17:26:27,909 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:26:27,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:26:27,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1726460512, now seen corresponding path program 3 times [2024-06-20 17:26:27,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:26:27,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503088510] [2024-06-20 17:26:27,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:26:27,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:26:27,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:26:32,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:26:32,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:26:32,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503088510] [2024-06-20 17:26:32,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503088510] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:26:32,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:26:32,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:26:32,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271589302] [2024-06-20 17:26:32,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:26:32,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:26:32,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:26:32,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:26:32,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:26:32,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:26:32,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 516 places, 827 transitions, 17305 flow. Second operand has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 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) [2024-06-20 17:26:32,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:26:32,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:26:32,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:26:36,423 INFO L124 PetriNetUnfolderBase]: 4759/7357 cut-off events. [2024-06-20 17:26:36,423 INFO L125 PetriNetUnfolderBase]: For 1952111/1952121 co-relation queries the response was YES. [2024-06-20 17:26:36,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102410 conditions, 7357 events. 4759/7357 cut-off events. For 1952111/1952121 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 44160 event pairs, 766 based on Foata normal form. 56/7409 useless extension candidates. Maximal degree in co-relation 102172. Up to 6209 conditions per place. [2024-06-20 17:26:36,581 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 784 selfloop transitions, 84 changer transitions 5/877 dead transitions. [2024-06-20 17:26:36,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 524 places, 877 transitions, 20118 flow [2024-06-20 17:26:36,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:26:36,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:26:36,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-20 17:26:36,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43089430894308944 [2024-06-20 17:26:36,582 INFO L175 Difference]: Start difference. First operand has 516 places, 827 transitions, 17305 flow. Second operand 9 states and 159 transitions. [2024-06-20 17:26:36,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 524 places, 877 transitions, 20118 flow [2024-06-20 17:26:42,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 517 places, 877 transitions, 19862 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-20 17:26:42,421 INFO L231 Difference]: Finished difference. Result has 519 places, 833 transitions, 17501 flow [2024-06-20 17:26:42,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=17053, PETRI_DIFFERENCE_MINUEND_PLACES=509, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=827, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=744, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=17501, PETRI_PLACES=519, PETRI_TRANSITIONS=833} [2024-06-20 17:26:42,422 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 477 predicate places. [2024-06-20 17:26:42,422 INFO L495 AbstractCegarLoop]: Abstraction has has 519 places, 833 transitions, 17501 flow [2024-06-20 17:26:42,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 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) [2024-06-20 17:26:42,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:26:42,422 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:26:42,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-20 17:26:42,423 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:26:42,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:26:42,423 INFO L85 PathProgramCache]: Analyzing trace with hash -553792227, now seen corresponding path program 8 times [2024-06-20 17:26:42,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:26:42,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064197011] [2024-06-20 17:26:42,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:26:42,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:26:42,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:26:46,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:26:46,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:26:46,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064197011] [2024-06-20 17:26:46,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064197011] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:26:46,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:26:46,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:26:46,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504002641] [2024-06-20 17:26:46,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:26:46,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:26:46,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:26:46,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:26:46,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:26:46,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:26:46,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 519 places, 833 transitions, 17501 flow. Second operand has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 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) [2024-06-20 17:26:46,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:26:46,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:26:46,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:26:49,619 INFO L124 PetriNetUnfolderBase]: 4613/7108 cut-off events. [2024-06-20 17:26:49,619 INFO L125 PetriNetUnfolderBase]: For 1663247/1663249 co-relation queries the response was YES. [2024-06-20 17:26:49,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98631 conditions, 7108 events. 4613/7108 cut-off events. For 1663247/1663249 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 42299 event pairs, 880 based on Foata normal form. 8/7109 useless extension candidates. Maximal degree in co-relation 98392. Up to 6535 conditions per place. [2024-06-20 17:26:49,776 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 710 selfloop transitions, 145 changer transitions 0/859 dead transitions. [2024-06-20 17:26:49,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 527 places, 859 transitions, 19411 flow [2024-06-20 17:26:49,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:26:49,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:26:49,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-20 17:26:49,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875338753387534 [2024-06-20 17:26:49,777 INFO L175 Difference]: Start difference. First operand has 519 places, 833 transitions, 17501 flow. Second operand 9 states and 143 transitions. [2024-06-20 17:26:49,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 527 places, 859 transitions, 19411 flow [2024-06-20 17:26:55,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 522 places, 859 transitions, 19297 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-20 17:26:55,260 INFO L231 Difference]: Finished difference. Result has 523 places, 833 transitions, 17684 flow [2024-06-20 17:26:55,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=17387, PETRI_DIFFERENCE_MINUEND_PLACES=514, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=833, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=688, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=17684, PETRI_PLACES=523, PETRI_TRANSITIONS=833} [2024-06-20 17:26:55,260 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 481 predicate places. [2024-06-20 17:26:55,260 INFO L495 AbstractCegarLoop]: Abstraction has has 523 places, 833 transitions, 17684 flow [2024-06-20 17:26:55,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 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) [2024-06-20 17:26:55,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:26:55,261 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:26:55,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-20 17:26:55,261 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:26:55,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:26:55,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1812467973, now seen corresponding path program 7 times [2024-06-20 17:26:55,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:26:55,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63994330] [2024-06-20 17:26:55,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:26:55,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:26:55,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:26:58,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:26:58,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:26:58,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63994330] [2024-06-20 17:26:58,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63994330] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:26:58,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:26:58,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:26:58,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777817976] [2024-06-20 17:26:58,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:26:58,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:26:58,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:26:58,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:26:58,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:26:58,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:26:58,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 523 places, 833 transitions, 17684 flow. Second operand has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 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) [2024-06-20 17:26:58,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:26:58,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:26:58,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:27:02,876 INFO L124 PetriNetUnfolderBase]: 4607/7110 cut-off events. [2024-06-20 17:27:02,876 INFO L125 PetriNetUnfolderBase]: For 1609744/1609746 co-relation queries the response was YES. [2024-06-20 17:27:02,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98240 conditions, 7110 events. 4607/7110 cut-off events. For 1609744/1609746 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 42401 event pairs, 863 based on Foata normal form. 2/7105 useless extension candidates. Maximal degree in co-relation 98000. Up to 6249 conditions per place. [2024-06-20 17:27:03,036 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 579 selfloop transitions, 281 changer transitions 0/864 dead transitions. [2024-06-20 17:27:03,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 532 places, 864 transitions, 19786 flow [2024-06-20 17:27:03,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:27:03,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:27:03,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 165 transitions. [2024-06-20 17:27:03,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-20 17:27:03,038 INFO L175 Difference]: Start difference. First operand has 523 places, 833 transitions, 17684 flow. Second operand 10 states and 165 transitions. [2024-06-20 17:27:03,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 532 places, 864 transitions, 19786 flow [2024-06-20 17:27:07,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 525 places, 864 transitions, 19403 flow, removed 48 selfloop flow, removed 7 redundant places. [2024-06-20 17:27:07,777 INFO L231 Difference]: Finished difference. Result has 526 places, 833 transitions, 17871 flow [2024-06-20 17:27:07,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=17303, PETRI_DIFFERENCE_MINUEND_PLACES=516, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=833, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=281, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=552, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=17871, PETRI_PLACES=526, PETRI_TRANSITIONS=833} [2024-06-20 17:27:07,778 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 484 predicate places. [2024-06-20 17:27:07,778 INFO L495 AbstractCegarLoop]: Abstraction has has 526 places, 833 transitions, 17871 flow [2024-06-20 17:27:07,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 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) [2024-06-20 17:27:07,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:27:07,779 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:27:07,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-20 17:27:07,779 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:27:07,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:27:07,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1899320332, now seen corresponding path program 1 times [2024-06-20 17:27:07,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:27:07,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829916294] [2024-06-20 17:27:07,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:27:07,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:27:07,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:27:11,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:27:11,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:27:11,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829916294] [2024-06-20 17:27:11,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829916294] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:27:11,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:27:11,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:27:11,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621321779] [2024-06-20 17:27:11,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:27:11,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:27:11,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:27:11,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:27:11,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:27:11,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 17:27:11,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 526 places, 833 transitions, 17871 flow. Second operand has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 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) [2024-06-20 17:27:11,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:27:11,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 17:27:11,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:27:15,209 INFO L124 PetriNetUnfolderBase]: 4579/7077 cut-off events. [2024-06-20 17:27:15,209 INFO L125 PetriNetUnfolderBase]: For 1608243/1608253 co-relation queries the response was YES. [2024-06-20 17:27:15,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96618 conditions, 7077 events. 4579/7077 cut-off events. For 1608243/1608253 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 42248 event pairs, 804 based on Foata normal form. 20/7093 useless extension candidates. Maximal degree in co-relation 96377. Up to 6755 conditions per place. [2024-06-20 17:27:15,349 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 820 selfloop transitions, 34 changer transitions 0/858 dead transitions. [2024-06-20 17:27:15,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 533 places, 858 transitions, 19811 flow [2024-06-20 17:27:15,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:27:15,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:27:15,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-20 17:27:15,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-20 17:27:15,350 INFO L175 Difference]: Start difference. First operand has 526 places, 833 transitions, 17871 flow. Second operand 8 states and 128 transitions. [2024-06-20 17:27:15,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 533 places, 858 transitions, 19811 flow [2024-06-20 17:27:21,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 524 places, 858 transitions, 19037 flow, removed 13 selfloop flow, removed 9 redundant places. [2024-06-20 17:27:21,084 INFO L231 Difference]: Finished difference. Result has 525 places, 833 transitions, 17173 flow [2024-06-20 17:27:21,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=17097, PETRI_DIFFERENCE_MINUEND_PLACES=517, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=833, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=799, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=17173, PETRI_PLACES=525, PETRI_TRANSITIONS=833} [2024-06-20 17:27:21,084 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 483 predicate places. [2024-06-20 17:27:21,085 INFO L495 AbstractCegarLoop]: Abstraction has has 525 places, 833 transitions, 17173 flow [2024-06-20 17:27:21,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 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) [2024-06-20 17:27:21,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:27:21,085 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:27:21,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-20 17:27:21,085 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:27:21,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:27:21,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1899166169, now seen corresponding path program 9 times [2024-06-20 17:27:21,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:27:21,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710988473] [2024-06-20 17:27:21,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:27:21,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:27:21,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Killed by 15