./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe009_rmo.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe009_rmo.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe009_rmo.opt.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe009_rmo.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-7724a2d-m [2024-06-28 03:58:52,090 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-28 03:58:52,159 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-28 03:58:52,164 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-28 03:58:52,164 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-28 03:58:52,187 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-28 03:58:52,188 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-28 03:58:52,188 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-28 03:58:52,189 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-28 03:58:52,192 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-28 03:58:52,192 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-28 03:58:52,192 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-28 03:58:52,193 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-28 03:58:52,194 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-28 03:58:52,194 INFO L153 SettingsManager]: * Use SBE=true [2024-06-28 03:58:52,194 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-28 03:58:52,194 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-28 03:58:52,194 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-28 03:58:52,194 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-28 03:58:52,195 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-28 03:58:52,195 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-28 03:58:52,195 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-28 03:58:52,195 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-28 03:58:52,195 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-28 03:58:52,196 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-28 03:58:52,196 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-28 03:58:52,196 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-28 03:58:52,196 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-28 03:58:52,196 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-28 03:58:52,197 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-28 03:58:52,197 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-28 03:58:52,197 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-28 03:58:52,198 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 03:58:52,198 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-28 03:58:52,198 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-28 03:58:52,198 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-28 03:58:52,198 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-28 03:58:52,198 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-28 03:58:52,198 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-28 03:58:52,198 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-28 03:58:52,199 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-28 03:58:52,199 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-28 03:58:52,199 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-28 03:58:52,199 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-28 03:58:52,399 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-28 03:58:52,418 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-28 03:58:52,420 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-28 03:58:52,421 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-28 03:58:52,421 INFO L274 PluginConnector]: CDTParser initialized [2024-06-28 03:58:52,422 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe009_rmo.opt.i [2024-06-28 03:58:53,592 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-28 03:58:53,796 INFO L384 CDTParser]: Found 1 translation units. [2024-06-28 03:58:53,796 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe009_rmo.opt.i [2024-06-28 03:58:53,815 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42222aa2c/2428d8e802b64fb78ea0c7149cefbb83/FLAG72f622c05 [2024-06-28 03:58:53,834 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42222aa2c/2428d8e802b64fb78ea0c7149cefbb83 [2024-06-28 03:58:53,836 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-28 03:58:53,837 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-28 03:58:53,837 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe009_rmo.opt.yml/witness.yml [2024-06-28 03:58:54,019 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-28 03:58:54,020 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-28 03:58:54,021 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-28 03:58:54,021 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-28 03:58:54,027 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-28 03:58:54,027 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 03:58:53" (1/2) ... [2024-06-28 03:58:54,028 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5afeb446 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:58:54, skipping insertion in model container [2024-06-28 03:58:54,029 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 03:58:53" (1/2) ... [2024-06-28 03:58:54,034 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4a653372 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:58:54, skipping insertion in model container [2024-06-28 03:58:54,034 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 03:58:54" (2/2) ... [2024-06-28 03:58:54,034 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5afeb446 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:58:54, skipping insertion in model container [2024-06-28 03:58:54,034 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 03:58:54" (2/2) ... [2024-06-28 03:58:54,035 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-28 03:58:54,129 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-28 03:58:54,130 INFO L97 edCorrectnessWitness]: Location invariant before [L844-L844] (((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p1_EAX$w_buff0_used == (_Bool)0) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || x$w_buff0_used == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX$read_delayed_var == 0 || (__unbuffered_p1_EAX$read_delayed_var == & x && (*__unbuffered_p1_EAX$read_delayed_var == 0 || *__unbuffered_p1_EAX$read_delayed_var == 1))))) && (! multithreaded || __unbuffered_p1_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (((((((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p1_EAX$flush_delayed == (_Bool)0) && __unbuffered_p1_EAX$mem_tmp == 0) && __unbuffered_p1_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p1_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p1_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p1_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p1_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p1_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p1_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p1_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p1_EAX$w_buff0 == 0) && __unbuffered_p1_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p1_EAX$w_buff1 == 0) && __unbuffered_p1_EAX$w_buff1_used == (_Bool)0) && x$flush_delayed == (_Bool)0) && x$r_buff0_thd0 == (_Bool)0) && x$r_buff0_thd1 == (_Bool)0) && x$r_buff0_thd2 == (_Bool)0) && x$r_buff0_thd3 == (_Bool)0) && x$r_buff1_thd0 == (_Bool)0) && x$r_buff1_thd1 == (_Bool)0) && x$r_buff1_thd2 == (_Bool)0) && x$r_buff1_thd3 == (_Bool)0) && x$read_delayed == (_Bool)0) && x$read_delayed_var == 0) && x$w_buff0 == 0) && x$w_buff0_used == (_Bool)0) && x$w_buff1 == 0) && x$w_buff1_used == (_Bool)0) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p1_EAX$read_delayed_var == 0 || (__unbuffered_p1_EAX$read_delayed_var == & x && (*__unbuffered_p1_EAX$read_delayed_var == 0 || *__unbuffered_p1_EAX$read_delayed_var == 1)))) && (x == 0 || x == 1)) && (x$mem_tmp == 0 || x$mem_tmp == 1)) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || __unbuffered_p1_EAX$w_buff1 == 0)) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff0 == 0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || x$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$mem_tmp == 0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$w_buff0 == 0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2)) [2024-06-28 03:58:54,130 INFO L97 edCorrectnessWitness]: Location invariant before [L841-L841] (((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p1_EAX$w_buff0_used == (_Bool)0) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || x$w_buff0_used == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX$read_delayed_var == 0 || (__unbuffered_p1_EAX$read_delayed_var == & x && (*__unbuffered_p1_EAX$read_delayed_var == 0 || *__unbuffered_p1_EAX$read_delayed_var == 1))))) && (! multithreaded || __unbuffered_p1_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (((((((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p1_EAX$flush_delayed == (_Bool)0) && __unbuffered_p1_EAX$mem_tmp == 0) && __unbuffered_p1_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p1_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p1_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p1_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p1_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p1_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p1_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p1_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p1_EAX$w_buff0 == 0) && __unbuffered_p1_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p1_EAX$w_buff1 == 0) && __unbuffered_p1_EAX$w_buff1_used == (_Bool)0) && x$flush_delayed == (_Bool)0) && x$r_buff0_thd0 == (_Bool)0) && x$r_buff0_thd1 == (_Bool)0) && x$r_buff0_thd2 == (_Bool)0) && x$r_buff0_thd3 == (_Bool)0) && x$r_buff1_thd0 == (_Bool)0) && x$r_buff1_thd1 == (_Bool)0) && x$r_buff1_thd2 == (_Bool)0) && x$r_buff1_thd3 == (_Bool)0) && x$read_delayed == (_Bool)0) && x$read_delayed_var == 0) && x$w_buff0 == 0) && x$w_buff0_used == (_Bool)0) && x$w_buff1 == 0) && x$w_buff1_used == (_Bool)0) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p1_EAX$read_delayed_var == 0 || (__unbuffered_p1_EAX$read_delayed_var == & x && (*__unbuffered_p1_EAX$read_delayed_var == 0 || *__unbuffered_p1_EAX$read_delayed_var == 1)))) && (x == 0 || x == 1)) && (x$mem_tmp == 0 || x$mem_tmp == 1)) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || __unbuffered_p1_EAX$w_buff1 == 0)) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff0 == 0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || x$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$mem_tmp == 0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$w_buff0 == 0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2)) [2024-06-28 03:58:54,131 INFO L97 edCorrectnessWitness]: Location invariant before [L843-L843] (((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p1_EAX$w_buff0_used == (_Bool)0) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || x$w_buff0_used == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX$read_delayed_var == 0 || (__unbuffered_p1_EAX$read_delayed_var == & x && (*__unbuffered_p1_EAX$read_delayed_var == 0 || *__unbuffered_p1_EAX$read_delayed_var == 1))))) && (! multithreaded || __unbuffered_p1_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (((((((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p1_EAX$flush_delayed == (_Bool)0) && __unbuffered_p1_EAX$mem_tmp == 0) && __unbuffered_p1_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p1_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p1_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p1_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p1_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p1_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p1_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p1_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p1_EAX$w_buff0 == 0) && __unbuffered_p1_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p1_EAX$w_buff1 == 0) && __unbuffered_p1_EAX$w_buff1_used == (_Bool)0) && x$flush_delayed == (_Bool)0) && x$r_buff0_thd0 == (_Bool)0) && x$r_buff0_thd1 == (_Bool)0) && x$r_buff0_thd2 == (_Bool)0) && x$r_buff0_thd3 == (_Bool)0) && x$r_buff1_thd0 == (_Bool)0) && x$r_buff1_thd1 == (_Bool)0) && x$r_buff1_thd2 == (_Bool)0) && x$r_buff1_thd3 == (_Bool)0) && x$read_delayed == (_Bool)0) && x$read_delayed_var == 0) && x$w_buff0 == 0) && x$w_buff0_used == (_Bool)0) && x$w_buff1 == 0) && x$w_buff1_used == (_Bool)0) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p1_EAX$read_delayed_var == 0 || (__unbuffered_p1_EAX$read_delayed_var == & x && (*__unbuffered_p1_EAX$read_delayed_var == 0 || *__unbuffered_p1_EAX$read_delayed_var == 1)))) && (x == 0 || x == 1)) && (x$mem_tmp == 0 || x$mem_tmp == 1)) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || __unbuffered_p1_EAX$w_buff1 == 0)) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff0 == 0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || x$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$mem_tmp == 0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$w_buff0 == 0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2)) [2024-06-28 03:58:54,131 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-28 03:58:54,131 INFO L106 edCorrectnessWitness]: ghost_update [L839-L839] multithreaded = 1; [2024-06-28 03:58:54,166 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-28 03:58:54,456 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 03:58:54,472 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-28 03:58:54,613 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 03:58:54,639 INFO L206 MainTranslator]: Completed translation [2024-06-28 03:58:54,639 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:58:54 WrapperNode [2024-06-28 03:58:54,639 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-28 03:58:54,640 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-28 03:58:54,640 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-28 03:58:54,640 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-28 03:58:54,645 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:58:54" (1/1) ... [2024-06-28 03:58:54,658 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:58:54" (1/1) ... [2024-06-28 03:58:54,690 INFO L138 Inliner]: procedures = 175, calls = 82, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 207 [2024-06-28 03:58:54,690 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-28 03:58:54,691 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-28 03:58:54,691 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-28 03:58:54,691 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-28 03:58:54,699 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:58:54" (1/1) ... [2024-06-28 03:58:54,699 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:58:54" (1/1) ... [2024-06-28 03:58:54,703 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:58:54" (1/1) ... [2024-06-28 03:58:54,717 INFO L175 MemorySlicer]: Split 43 memory accesses to 2 slices as follows [2, 41]. 95 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]. [2024-06-28 03:58:54,718 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:58:54" (1/1) ... [2024-06-28 03:58:54,718 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:58:54" (1/1) ... [2024-06-28 03:58:54,729 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:58:54" (1/1) ... [2024-06-28 03:58:54,732 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:58:54" (1/1) ... [2024-06-28 03:58:54,734 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:58:54" (1/1) ... [2024-06-28 03:58:54,736 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:58:54" (1/1) ... [2024-06-28 03:58:54,739 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-28 03:58:54,748 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-28 03:58:54,755 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-28 03:58:54,755 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-28 03:58:54,756 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:58:54" (1/1) ... [2024-06-28 03:58:54,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 03:58:54,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 03:58:54,793 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) [2024-06-28 03:58:54,811 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 [2024-06-28 03:58:54,825 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-28 03:58:54,825 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-28 03:58:54,826 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-28 03:58:54,826 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-28 03:58:54,826 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-28 03:58:54,826 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-28 03:58:54,826 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-28 03:58:54,827 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-28 03:58:54,827 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-28 03:58:54,827 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-28 03:58:54,827 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-28 03:58:54,827 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-28 03:58:54,827 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-28 03:58:54,827 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-28 03:58:54,828 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-28 03:58:54,828 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-28 03:58:54,829 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-28 03:58:54,830 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-28 03:58:54,997 INFO L244 CfgBuilder]: Building ICFG [2024-06-28 03:58:54,998 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-28 03:58:55,517 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-28 03:58:55,518 INFO L293 CfgBuilder]: Performing block encoding [2024-06-28 03:58:55,816 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-28 03:58:55,817 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-28 03:58:55,817 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 03:58:55 BoogieIcfgContainer [2024-06-28 03:58:55,818 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-28 03:58:55,819 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-28 03:58:55,819 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-28 03:58:55,822 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-28 03:58:55,822 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.06 03:58:53" (1/4) ... [2024-06-28 03:58:55,822 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e910957 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 03:58:55, skipping insertion in model container [2024-06-28 03:58:55,822 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 03:58:54" (2/4) ... [2024-06-28 03:58:55,823 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e910957 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 03:58:55, skipping insertion in model container [2024-06-28 03:58:55,823 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:58:54" (3/4) ... [2024-06-28 03:58:55,823 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e910957 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 03:58:55, skipping insertion in model container [2024-06-28 03:58:55,823 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 03:58:55" (4/4) ... [2024-06-28 03:58:55,824 INFO L112 eAbstractionObserver]: Analyzing ICFG safe009_rmo.opt.i [2024-06-28 03:58:55,838 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-28 03:58:55,838 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-28 03:58:55,838 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-28 03:58:55,895 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-28 03:58:55,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-28 03:58:56,007 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-28 03:58:56,008 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 03:58:56,009 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 56 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. [2024-06-28 03:58:56,009 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-28 03:58:56,012 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-28 03:58:56,022 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-28 03:58:56,028 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;@18788d3a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-28 03:58:56,028 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-28 03:58:56,031 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-28 03:58:56,031 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-28 03:58:56,032 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 03:58:56,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:58:56,032 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-28 03:58:56,033 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)] === [2024-06-28 03:58:56,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:58:56,038 INFO L85 PathProgramCache]: Analyzing trace with hash 719301889, now seen corresponding path program 1 times [2024-06-28 03:58:56,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:58:56,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564998424] [2024-06-28 03:58:56,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:58:56,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:58:56,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:58:57,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:58:57,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:58:57,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564998424] [2024-06-28 03:58:57,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564998424] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:58:57,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:58:57,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-28 03:58:57,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978710411] [2024-06-28 03:58:57,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:58:57,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-28 03:58:57,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:58:57,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-28 03:58:57,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-28 03:58:57,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:58:57,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:58:57,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:58:57,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:58:57,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:58:58,403 INFO L124 PetriNetUnfolderBase]: 1205/1833 cut-off events. [2024-06-28 03:58:58,403 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-06-28 03:58:58,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3738 conditions, 1833 events. 1205/1833 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 8333 event pairs, 800 based on Foata normal form. 1/1800 useless extension candidates. Maximal degree in co-relation 3726. Up to 1818 conditions per place. [2024-06-28 03:58:58,415 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 35 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2024-06-28 03:58:58,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 44 transitions, 181 flow [2024-06-28 03:58:58,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-28 03:58:58,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-28 03:58:58,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 66 transitions. [2024-06-28 03:58:58,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-28 03:58:58,425 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 66 transitions. [2024-06-28 03:58:58,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 44 transitions, 181 flow [2024-06-28 03:58:58,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 44 transitions, 176 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-28 03:58:58,428 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-28 03:58:58,430 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} [2024-06-28 03:58:58,432 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-28 03:58:58,432 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-28 03:58:58,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:58:58,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:58:58,433 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:58:58,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-28 03:58:58,433 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)] === [2024-06-28 03:58:58,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:58:58,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1132113769, now seen corresponding path program 1 times [2024-06-28 03:58:58,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:58:58,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249631049] [2024-06-28 03:58:58,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:58:58,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:58:58,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:59:00,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:59:00,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:59:00,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249631049] [2024-06-28 03:59:00,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249631049] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:59:00,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:59:00,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 03:59:00,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749648060] [2024-06-28 03:59:00,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:59:00,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 03:59:00,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:59:00,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 03:59:00,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 03:59:00,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 03:59:00,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 100 flow. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:59:00,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:59:00,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 03:59:00,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:59:00,855 INFO L124 PetriNetUnfolderBase]: 1454/2199 cut-off events. [2024-06-28 03:59:00,855 INFO L125 PetriNetUnfolderBase]: For 387/391 co-relation queries the response was YES. [2024-06-28 03:59:00,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5057 conditions, 2199 events. 1454/2199 cut-off events. For 387/391 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 9910 event pairs, 628 based on Foata normal form. 10/2209 useless extension candidates. Maximal degree in co-relation 5045. Up to 2126 conditions per place. [2024-06-28 03:59:00,865 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 47 selfloop transitions, 7 changer transitions 0/58 dead transitions. [2024-06-28 03:59:00,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 58 transitions, 266 flow [2024-06-28 03:59:00,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 03:59:00,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 03:59:00,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 85 transitions. [2024-06-28 03:59:00,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5182926829268293 [2024-06-28 03:59:00,867 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 85 transitions. [2024-06-28 03:59:00,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 58 transitions, 266 flow [2024-06-28 03:59:00,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 58 transitions, 262 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-28 03:59:00,869 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 136 flow [2024-06-28 03:59:00,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=136, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2024-06-28 03:59:00,869 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 3 predicate places. [2024-06-28 03:59:00,869 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 136 flow [2024-06-28 03:59:00,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:59:00,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:59:00,870 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:59:00,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-28 03:59:00,870 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:59:00,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:59:00,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1159447834, now seen corresponding path program 1 times [2024-06-28 03:59:00,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:59:00,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148041350] [2024-06-28 03:59:00,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:59:00,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:59:00,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:59:03,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:59:03,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:59:03,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148041350] [2024-06-28 03:59:03,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148041350] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:59:03,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:59:03,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:59:03,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000738320] [2024-06-28 03:59:03,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:59:03,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:59:03,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:59:03,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:59:03,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:59:03,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 03:59:03,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 136 flow. Second operand has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:59:03,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:59:03,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 03:59:03,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:59:04,320 INFO L124 PetriNetUnfolderBase]: 1445/2184 cut-off events. [2024-06-28 03:59:04,321 INFO L125 PetriNetUnfolderBase]: For 1101/1109 co-relation queries the response was YES. [2024-06-28 03:59:04,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5563 conditions, 2184 events. 1445/2184 cut-off events. For 1101/1109 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 9793 event pairs, 483 based on Foata normal form. 14/2198 useless extension candidates. Maximal degree in co-relation 5549. Up to 2073 conditions per place. [2024-06-28 03:59:04,332 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 52 selfloop transitions, 9 changer transitions 0/65 dead transitions. [2024-06-28 03:59:04,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 65 transitions, 326 flow [2024-06-28 03:59:04,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 03:59:04,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 03:59:04,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 99 transitions. [2024-06-28 03:59:04,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48292682926829267 [2024-06-28 03:59:04,336 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 136 flow. Second operand 5 states and 99 transitions. [2024-06-28 03:59:04,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 65 transitions, 326 flow [2024-06-28 03:59:04,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 65 transitions, 312 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-28 03:59:04,339 INFO L231 Difference]: Finished difference. Result has 47 places, 39 transitions, 157 flow [2024-06-28 03:59:04,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=157, PETRI_PLACES=47, PETRI_TRANSITIONS=39} [2024-06-28 03:59:04,340 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 5 predicate places. [2024-06-28 03:59:04,340 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 39 transitions, 157 flow [2024-06-28 03:59:04,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:59:04,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:59:04,341 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:59:04,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-28 03:59:04,341 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)] === [2024-06-28 03:59:04,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:59:04,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1132942948, now seen corresponding path program 1 times [2024-06-28 03:59:04,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:59:04,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464360089] [2024-06-28 03:59:04,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:59:04,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:59:04,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:59:06,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:59:06,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:59:06,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464360089] [2024-06-28 03:59:06,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464360089] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:59:06,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:59:06,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 03:59:06,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143583464] [2024-06-28 03:59:06,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:59:06,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 03:59:06,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:59:06,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 03:59:06,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-28 03:59:06,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-28 03:59:06,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 39 transitions, 157 flow. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:59:06,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:59:06,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-28 03:59:06,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:59:06,979 INFO L124 PetriNetUnfolderBase]: 1179/1793 cut-off events. [2024-06-28 03:59:06,979 INFO L125 PetriNetUnfolderBase]: For 1667/1667 co-relation queries the response was YES. [2024-06-28 03:59:06,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4952 conditions, 1793 events. 1179/1793 cut-off events. For 1667/1667 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 8058 event pairs, 604 based on Foata normal form. 2/1794 useless extension candidates. Maximal degree in co-relation 4936. Up to 1767 conditions per place. [2024-06-28 03:59:07,000 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 44 selfloop transitions, 8 changer transitions 0/56 dead transitions. [2024-06-28 03:59:07,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 56 transitions, 309 flow [2024-06-28 03:59:07,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 03:59:07,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 03:59:07,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 84 transitions. [2024-06-28 03:59:07,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4097560975609756 [2024-06-28 03:59:07,003 INFO L175 Difference]: Start difference. First operand has 47 places, 39 transitions, 157 flow. Second operand 5 states and 84 transitions. [2024-06-28 03:59:07,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 56 transitions, 309 flow [2024-06-28 03:59:07,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 56 transitions, 286 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-28 03:59:07,008 INFO L231 Difference]: Finished difference. Result has 49 places, 42 transitions, 178 flow [2024-06-28 03:59:07,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=178, PETRI_PLACES=49, PETRI_TRANSITIONS=42} [2024-06-28 03:59:07,009 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 7 predicate places. [2024-06-28 03:59:07,009 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 42 transitions, 178 flow [2024-06-28 03:59:07,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:59:07,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:59:07,010 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:59:07,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-28 03:59:07,011 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)] === [2024-06-28 03:59:07,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:59:07,011 INFO L85 PathProgramCache]: Analyzing trace with hash 761495015, now seen corresponding path program 1 times [2024-06-28 03:59:07,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:59:07,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020758550] [2024-06-28 03:59:07,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:59:07,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:59:07,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:59:09,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:59:09,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:59:09,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020758550] [2024-06-28 03:59:09,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020758550] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:59:09,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:59:09,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:59:09,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959836879] [2024-06-28 03:59:09,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:59:09,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:59:09,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:59:09,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:59:09,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:59:09,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-28 03:59:09,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 42 transitions, 178 flow. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:59:09,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:59:09,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-28 03:59:09,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:59:10,074 INFO L124 PetriNetUnfolderBase]: 1453/2194 cut-off events. [2024-06-28 03:59:10,074 INFO L125 PetriNetUnfolderBase]: For 2939/2939 co-relation queries the response was YES. [2024-06-28 03:59:10,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6409 conditions, 2194 events. 1453/2194 cut-off events. For 2939/2939 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9828 event pairs, 632 based on Foata normal form. 8/2202 useless extension candidates. Maximal degree in co-relation 6391. Up to 2077 conditions per place. [2024-06-28 03:59:10,088 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 65 selfloop transitions, 15 changer transitions 0/83 dead transitions. [2024-06-28 03:59:10,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 83 transitions, 481 flow [2024-06-28 03:59:10,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:59:10,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:59:10,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-28 03:59:10,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-28 03:59:10,093 INFO L175 Difference]: Start difference. First operand has 49 places, 42 transitions, 178 flow. Second operand 6 states and 105 transitions. [2024-06-28 03:59:10,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 83 transitions, 481 flow [2024-06-28 03:59:10,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 83 transitions, 450 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-28 03:59:10,102 INFO L231 Difference]: Finished difference. Result has 54 places, 55 transitions, 275 flow [2024-06-28 03:59:10,102 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=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=275, PETRI_PLACES=54, PETRI_TRANSITIONS=55} [2024-06-28 03:59:10,104 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 12 predicate places. [2024-06-28 03:59:10,105 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 55 transitions, 275 flow [2024-06-28 03:59:10,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:59:10,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:59:10,105 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:59:10,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-28 03:59:10,105 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)] === [2024-06-28 03:59:10,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:59:10,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1377232946, now seen corresponding path program 1 times [2024-06-28 03:59:10,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:59:10,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445780210] [2024-06-28 03:59:10,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:59:10,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:59:10,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:59:12,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:59:12,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:59:12,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445780210] [2024-06-28 03:59:12,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445780210] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:59:12,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:59:12,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:59:12,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524906396] [2024-06-28 03:59:12,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:59:12,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:59:12,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:59:12,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:59:12,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:59:12,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-28 03:59:12,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 55 transitions, 275 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:59:12,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:59:12,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-28 03:59:12,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:59:13,343 INFO L124 PetriNetUnfolderBase]: 1479/2236 cut-off events. [2024-06-28 03:59:13,344 INFO L125 PetriNetUnfolderBase]: For 4750/4768 co-relation queries the response was YES. [2024-06-28 03:59:13,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7464 conditions, 2236 events. 1479/2236 cut-off events. For 4750/4768 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 10081 event pairs, 535 based on Foata normal form. 19/2255 useless extension candidates. Maximal degree in co-relation 7443. Up to 2077 conditions per place. [2024-06-28 03:59:13,355 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 70 selfloop transitions, 17 changer transitions 0/90 dead transitions. [2024-06-28 03:59:13,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 90 transitions, 587 flow [2024-06-28 03:59:13,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:59:13,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:59:13,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-28 03:59:13,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-28 03:59:13,357 INFO L175 Difference]: Start difference. First operand has 54 places, 55 transitions, 275 flow. Second operand 6 states and 105 transitions. [2024-06-28 03:59:13,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 90 transitions, 587 flow [2024-06-28 03:59:13,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 90 transitions, 577 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-06-28 03:59:13,364 INFO L231 Difference]: Finished difference. Result has 59 places, 61 transitions, 357 flow [2024-06-28 03:59:13,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=265, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=357, PETRI_PLACES=59, PETRI_TRANSITIONS=61} [2024-06-28 03:59:13,368 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 17 predicate places. [2024-06-28 03:59:13,368 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 61 transitions, 357 flow [2024-06-28 03:59:13,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:59:13,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:59:13,368 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:59:13,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-28 03:59:13,368 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)] === [2024-06-28 03:59:13,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:59:13,369 INFO L85 PathProgramCache]: Analyzing trace with hash 975212740, now seen corresponding path program 1 times [2024-06-28 03:59:13,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:59:13,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806174436] [2024-06-28 03:59:13,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:59:13,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:59:13,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:59:15,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:59:15,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:59:15,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806174436] [2024-06-28 03:59:15,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806174436] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:59:15,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:59:15,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:59:15,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754608674] [2024-06-28 03:59:15,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:59:15,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:59:15,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:59:15,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:59:15,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:59:15,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-28 03:59:15,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 61 transitions, 357 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:59:15,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:59:15,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-28 03:59:15,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:59:16,751 INFO L124 PetriNetUnfolderBase]: 1597/2400 cut-off events. [2024-06-28 03:59:16,751 INFO L125 PetriNetUnfolderBase]: For 6760/6768 co-relation queries the response was YES. [2024-06-28 03:59:16,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8621 conditions, 2400 events. 1597/2400 cut-off events. For 6760/6768 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 10855 event pairs, 582 based on Foata normal form. 16/2416 useless extension candidates. Maximal degree in co-relation 8597. Up to 2153 conditions per place. [2024-06-28 03:59:16,765 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 67 selfloop transitions, 32 changer transitions 0/102 dead transitions. [2024-06-28 03:59:16,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 102 transitions, 723 flow [2024-06-28 03:59:16,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:59:16,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:59:16,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-28 03:59:16,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-28 03:59:16,767 INFO L175 Difference]: Start difference. First operand has 59 places, 61 transitions, 357 flow. Second operand 8 states and 128 transitions. [2024-06-28 03:59:16,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 102 transitions, 723 flow [2024-06-28 03:59:16,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 102 transitions, 696 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-28 03:59:16,774 INFO L231 Difference]: Finished difference. Result has 67 places, 74 transitions, 526 flow [2024-06-28 03:59:16,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=330, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=526, PETRI_PLACES=67, PETRI_TRANSITIONS=74} [2024-06-28 03:59:16,775 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 25 predicate places. [2024-06-28 03:59:16,775 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 74 transitions, 526 flow [2024-06-28 03:59:16,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:59:16,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:59:16,776 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:59:16,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-28 03:59:16,776 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)] === [2024-06-28 03:59:16,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:59:16,776 INFO L85 PathProgramCache]: Analyzing trace with hash 974578294, now seen corresponding path program 2 times [2024-06-28 03:59:16,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:59:16,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005297555] [2024-06-28 03:59:16,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:59:16,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:59:16,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:59:18,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:59:18,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:59:18,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005297555] [2024-06-28 03:59:18,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005297555] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:59:18,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:59:18,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:59:18,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527386396] [2024-06-28 03:59:18,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:59:18,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:59:18,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:59:18,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:59:18,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:59:18,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-28 03:59:18,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 74 transitions, 526 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:59:18,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:59:18,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-28 03:59:18,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:59:19,366 INFO L124 PetriNetUnfolderBase]: 1587/2386 cut-off events. [2024-06-28 03:59:19,367 INFO L125 PetriNetUnfolderBase]: For 9452/9460 co-relation queries the response was YES. [2024-06-28 03:59:19,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9673 conditions, 2386 events. 1587/2386 cut-off events. For 9452/9460 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 10731 event pairs, 649 based on Foata normal form. 12/2398 useless extension candidates. Maximal degree in co-relation 9645. Up to 2301 conditions per place. [2024-06-28 03:59:19,381 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 78 selfloop transitions, 13 changer transitions 0/94 dead transitions. [2024-06-28 03:59:19,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 94 transitions, 756 flow [2024-06-28 03:59:19,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:59:19,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:59:19,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 97 transitions. [2024-06-28 03:59:19,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3943089430894309 [2024-06-28 03:59:19,385 INFO L175 Difference]: Start difference. First operand has 67 places, 74 transitions, 526 flow. Second operand 6 states and 97 transitions. [2024-06-28 03:59:19,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 94 transitions, 756 flow [2024-06-28 03:59:19,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 94 transitions, 717 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-28 03:59:19,398 INFO L231 Difference]: Finished difference. Result has 70 places, 74 transitions, 521 flow [2024-06-28 03:59:19,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=487, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=521, PETRI_PLACES=70, PETRI_TRANSITIONS=74} [2024-06-28 03:59:19,399 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 28 predicate places. [2024-06-28 03:59:19,399 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 74 transitions, 521 flow [2024-06-28 03:59:19,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:59:19,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:59:19,400 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:59:19,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-28 03:59:19,400 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:59:19,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:59:19,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1786146320, now seen corresponding path program 2 times [2024-06-28 03:59:19,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:59:19,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326371784] [2024-06-28 03:59:19,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:59:19,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:59:19,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:59:21,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:59:21,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:59:21,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326371784] [2024-06-28 03:59:21,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326371784] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:59:21,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:59:21,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:59:21,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637111078] [2024-06-28 03:59:21,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:59:21,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:59:21,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:59:21,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:59:21,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:59:21,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-28 03:59:21,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 74 transitions, 521 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:59:21,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:59:21,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-28 03:59:21,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:59:22,870 INFO L124 PetriNetUnfolderBase]: 1637/2456 cut-off events. [2024-06-28 03:59:22,870 INFO L125 PetriNetUnfolderBase]: For 10867/10873 co-relation queries the response was YES. [2024-06-28 03:59:22,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10083 conditions, 2456 events. 1637/2456 cut-off events. For 10867/10873 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 11174 event pairs, 587 based on Foata normal form. 14/2470 useless extension candidates. Maximal degree in co-relation 10053. Up to 2059 conditions per place. [2024-06-28 03:59:22,882 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 77 selfloop transitions, 42 changer transitions 0/122 dead transitions. [2024-06-28 03:59:22,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 122 transitions, 997 flow [2024-06-28 03:59:22,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:59:22,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:59:22,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-28 03:59:22,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-28 03:59:22,884 INFO L175 Difference]: Start difference. First operand has 70 places, 74 transitions, 521 flow. Second operand 7 states and 126 transitions. [2024-06-28 03:59:22,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 122 transitions, 997 flow [2024-06-28 03:59:22,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 122 transitions, 949 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-28 03:59:22,893 INFO L231 Difference]: Finished difference. Result has 74 places, 88 transitions, 730 flow [2024-06-28 03:59:22,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=481, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=730, PETRI_PLACES=74, PETRI_TRANSITIONS=88} [2024-06-28 03:59:22,894 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 32 predicate places. [2024-06-28 03:59:22,894 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 88 transitions, 730 flow [2024-06-28 03:59:22,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:59:22,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:59:22,895 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:59:22,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-28 03:59:22,895 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)] === [2024-06-28 03:59:22,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:59:22,895 INFO L85 PathProgramCache]: Analyzing trace with hash -1786137392, now seen corresponding path program 1 times [2024-06-28 03:59:22,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:59:22,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281161808] [2024-06-28 03:59:22,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:59:22,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:59:22,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:59:25,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:59:25,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:59:25,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281161808] [2024-06-28 03:59:25,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281161808] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:59:25,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:59:25,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:59:25,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429939393] [2024-06-28 03:59:25,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:59:25,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:59:25,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:59:25,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:59:25,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:59:25,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-28 03:59:25,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 88 transitions, 730 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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) [2024-06-28 03:59:25,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:59:25,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-28 03:59:25,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:59:27,052 INFO L124 PetriNetUnfolderBase]: 1689/2538 cut-off events. [2024-06-28 03:59:27,052 INFO L125 PetriNetUnfolderBase]: For 13132/13132 co-relation queries the response was YES. [2024-06-28 03:59:27,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11120 conditions, 2538 events. 1689/2538 cut-off events. For 13132/13132 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 11638 event pairs, 594 based on Foata normal form. 16/2554 useless extension candidates. Maximal degree in co-relation 11087. Up to 2327 conditions per place. [2024-06-28 03:59:27,066 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 107 selfloop transitions, 19 changer transitions 0/129 dead transitions. [2024-06-28 03:59:27,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 129 transitions, 1144 flow [2024-06-28 03:59:27,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:59:27,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:59:27,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-28 03:59:27,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43205574912891986 [2024-06-28 03:59:27,077 INFO L175 Difference]: Start difference. First operand has 74 places, 88 transitions, 730 flow. Second operand 7 states and 124 transitions. [2024-06-28 03:59:27,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 129 transitions, 1144 flow [2024-06-28 03:59:27,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 129 transitions, 1098 flow, removed 22 selfloop flow, removed 1 redundant places. [2024-06-28 03:59:27,090 INFO L231 Difference]: Finished difference. Result has 80 places, 90 transitions, 758 flow [2024-06-28 03:59:27,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=688, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=758, PETRI_PLACES=80, PETRI_TRANSITIONS=90} [2024-06-28 03:59:27,090 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 38 predicate places. [2024-06-28 03:59:27,090 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 90 transitions, 758 flow [2024-06-28 03:59:27,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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) [2024-06-28 03:59:27,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:59:27,091 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:59:27,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-28 03:59:27,091 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)] === [2024-06-28 03:59:27,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:59:27,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1524715937, now seen corresponding path program 1 times [2024-06-28 03:59:27,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:59:27,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15068971] [2024-06-28 03:59:27,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:59:27,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:59:27,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:59:29,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:59:29,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:59:29,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15068971] [2024-06-28 03:59:29,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15068971] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:59:29,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:59:29,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:59:29,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884153601] [2024-06-28 03:59:29,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:59:29,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:59:29,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:59:29,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:59:29,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:59:29,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-28 03:59:29,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 90 transitions, 758 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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) [2024-06-28 03:59:29,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:59:29,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-28 03:59:29,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:59:30,963 INFO L124 PetriNetUnfolderBase]: 2093/3110 cut-off events. [2024-06-28 03:59:30,963 INFO L125 PetriNetUnfolderBase]: For 16321/16345 co-relation queries the response was YES. [2024-06-28 03:59:30,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13163 conditions, 3110 events. 2093/3110 cut-off events. For 16321/16345 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 14601 event pairs, 479 based on Foata normal form. 39/3149 useless extension candidates. Maximal degree in co-relation 13127. Up to 2321 conditions per place. [2024-06-28 03:59:30,980 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 112 selfloop transitions, 45 changer transitions 0/160 dead transitions. [2024-06-28 03:59:30,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 160 transitions, 1388 flow [2024-06-28 03:59:30,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:59:30,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:59:30,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 179 transitions. [2024-06-28 03:59:30,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43658536585365854 [2024-06-28 03:59:30,982 INFO L175 Difference]: Start difference. First operand has 80 places, 90 transitions, 758 flow. Second operand 10 states and 179 transitions. [2024-06-28 03:59:30,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 160 transitions, 1388 flow [2024-06-28 03:59:30,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 160 transitions, 1340 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-28 03:59:30,999 INFO L231 Difference]: Finished difference. Result has 87 places, 102 transitions, 929 flow [2024-06-28 03:59:30,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=710, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=929, PETRI_PLACES=87, PETRI_TRANSITIONS=102} [2024-06-28 03:59:30,999 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 45 predicate places. [2024-06-28 03:59:31,000 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 102 transitions, 929 flow [2024-06-28 03:59:31,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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) [2024-06-28 03:59:31,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:59:31,000 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:59:31,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-28 03:59:31,000 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)] === [2024-06-28 03:59:31,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:59:31,001 INFO L85 PathProgramCache]: Analyzing trace with hash 166825677, now seen corresponding path program 2 times [2024-06-28 03:59:31,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:59:31,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858709406] [2024-06-28 03:59:31,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:59:31,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:59:31,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:59:33,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:59:33,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:59:33,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858709406] [2024-06-28 03:59:33,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858709406] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:59:33,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:59:33,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:59:33,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508107613] [2024-06-28 03:59:33,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:59:33,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:59:33,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:59:33,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:59:33,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:59:33,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-28 03:59:33,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 102 transitions, 929 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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) [2024-06-28 03:59:33,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:59:33,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-28 03:59:33,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:59:34,810 INFO L124 PetriNetUnfolderBase]: 2265/3352 cut-off events. [2024-06-28 03:59:34,811 INFO L125 PetriNetUnfolderBase]: For 21977/21985 co-relation queries the response was YES. [2024-06-28 03:59:34,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15488 conditions, 3352 events. 2265/3352 cut-off events. For 21977/21985 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 15864 event pairs, 639 based on Foata normal form. 24/3376 useless extension candidates. Maximal degree in co-relation 15449. Up to 2721 conditions per place. [2024-06-28 03:59:34,830 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 119 selfloop transitions, 46 changer transitions 0/168 dead transitions. [2024-06-28 03:59:34,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 168 transitions, 1605 flow [2024-06-28 03:59:34,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 03:59:34,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 03:59:34,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 186 transitions. [2024-06-28 03:59:34,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4124168514412417 [2024-06-28 03:59:34,832 INFO L175 Difference]: Start difference. First operand has 87 places, 102 transitions, 929 flow. Second operand 11 states and 186 transitions. [2024-06-28 03:59:34,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 168 transitions, 1605 flow [2024-06-28 03:59:34,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 168 transitions, 1492 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-06-28 03:59:34,857 INFO L231 Difference]: Finished difference. Result has 94 places, 113 transitions, 1057 flow [2024-06-28 03:59:34,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=836, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1057, PETRI_PLACES=94, PETRI_TRANSITIONS=113} [2024-06-28 03:59:34,857 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 52 predicate places. [2024-06-28 03:59:34,857 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 113 transitions, 1057 flow [2024-06-28 03:59:34,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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) [2024-06-28 03:59:34,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:59:34,858 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:59:34,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-28 03:59:34,858 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)] === [2024-06-28 03:59:34,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:59:34,858 INFO L85 PathProgramCache]: Analyzing trace with hash -434660193, now seen corresponding path program 3 times [2024-06-28 03:59:34,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:59:34,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321825091] [2024-06-28 03:59:34,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:59:34,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:59:34,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:59:36,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:59:36,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:59:36,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321825091] [2024-06-28 03:59:36,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321825091] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:59:36,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:59:36,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:59:36,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050178648] [2024-06-28 03:59:36,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:59:36,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:59:36,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:59:36,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:59:36,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:59:36,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-28 03:59:36,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 113 transitions, 1057 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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) [2024-06-28 03:59:36,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:59:36,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-28 03:59:36,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:59:38,420 INFO L124 PetriNetUnfolderBase]: 2237/3316 cut-off events. [2024-06-28 03:59:38,420 INFO L125 PetriNetUnfolderBase]: For 23991/23999 co-relation queries the response was YES. [2024-06-28 03:59:38,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15609 conditions, 3316 events. 2237/3316 cut-off events. For 23991/23999 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 15706 event pairs, 659 based on Foata normal form. 24/3340 useless extension candidates. Maximal degree in co-relation 15567. Up to 2713 conditions per place. [2024-06-28 03:59:38,439 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 111 selfloop transitions, 41 changer transitions 0/155 dead transitions. [2024-06-28 03:59:38,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 155 transitions, 1523 flow [2024-06-28 03:59:38,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:59:38,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:59:38,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-28 03:59:38,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-28 03:59:38,441 INFO L175 Difference]: Start difference. First operand has 94 places, 113 transitions, 1057 flow. Second operand 9 states and 153 transitions. [2024-06-28 03:59:38,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 155 transitions, 1523 flow [2024-06-28 03:59:38,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 155 transitions, 1430 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-28 03:59:38,486 INFO L231 Difference]: Finished difference. Result has 97 places, 113 transitions, 1056 flow [2024-06-28 03:59:38,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=964, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1056, PETRI_PLACES=97, PETRI_TRANSITIONS=113} [2024-06-28 03:59:38,487 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 55 predicate places. [2024-06-28 03:59:38,488 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 113 transitions, 1056 flow [2024-06-28 03:59:38,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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) [2024-06-28 03:59:38,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:59:38,488 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:59:38,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-28 03:59:38,488 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)] === [2024-06-28 03:59:38,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:59:38,490 INFO L85 PathProgramCache]: Analyzing trace with hash 464040737, now seen corresponding path program 4 times [2024-06-28 03:59:38,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:59:38,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795852144] [2024-06-28 03:59:38,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:59:38,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:59:38,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:59:40,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:59:40,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:59:40,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795852144] [2024-06-28 03:59:40,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795852144] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:59:40,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:59:40,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:59:40,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022774805] [2024-06-28 03:59:40,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:59:40,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:59:40,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:59:40,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:59:40,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:59:40,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-28 03:59:40,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 113 transitions, 1056 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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) [2024-06-28 03:59:40,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:59:40,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-28 03:59:40,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:59:42,182 INFO L124 PetriNetUnfolderBase]: 2433/3588 cut-off events. [2024-06-28 03:59:42,182 INFO L125 PetriNetUnfolderBase]: For 27699/27707 co-relation queries the response was YES. [2024-06-28 03:59:42,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17053 conditions, 3588 events. 2433/3588 cut-off events. For 27699/27707 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 17112 event pairs, 625 based on Foata normal form. 24/3612 useless extension candidates. Maximal degree in co-relation 17009. Up to 2549 conditions per place. [2024-06-28 03:59:42,202 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 114 selfloop transitions, 67 changer transitions 0/184 dead transitions. [2024-06-28 03:59:42,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 184 transitions, 1780 flow [2024-06-28 03:59:42,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:59:42,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:59:42,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 183 transitions. [2024-06-28 03:59:42,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44634146341463415 [2024-06-28 03:59:42,204 INFO L175 Difference]: Start difference. First operand has 97 places, 113 transitions, 1056 flow. Second operand 10 states and 183 transitions. [2024-06-28 03:59:42,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 184 transitions, 1780 flow [2024-06-28 03:59:42,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 184 transitions, 1698 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-28 03:59:42,232 INFO L231 Difference]: Finished difference. Result has 100 places, 124 transitions, 1249 flow [2024-06-28 03:59:42,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=974, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1249, PETRI_PLACES=100, PETRI_TRANSITIONS=124} [2024-06-28 03:59:42,233 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 58 predicate places. [2024-06-28 03:59:42,233 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 124 transitions, 1249 flow [2024-06-28 03:59:42,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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) [2024-06-28 03:59:42,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:59:42,233 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:59:42,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-28 03:59:42,234 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:59:42,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:59:42,234 INFO L85 PathProgramCache]: Analyzing trace with hash -1761408745, now seen corresponding path program 1 times [2024-06-28 03:59:42,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:59:42,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995517178] [2024-06-28 03:59:42,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:59:42,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:59:42,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:59:43,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:59:43,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:59:43,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995517178] [2024-06-28 03:59:43,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995517178] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:59:43,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:59:43,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 03:59:43,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617832527] [2024-06-28 03:59:43,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:59:43,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 03:59:43,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:59:43,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 03:59:43,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-28 03:59:43,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-28 03:59:43,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 124 transitions, 1249 flow. Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:59:43,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:59:43,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-28 03:59:43,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:59:44,331 INFO L124 PetriNetUnfolderBase]: 2427/3578 cut-off events. [2024-06-28 03:59:44,332 INFO L125 PetriNetUnfolderBase]: For 31439/31439 co-relation queries the response was YES. [2024-06-28 03:59:44,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18080 conditions, 3578 events. 2427/3578 cut-off events. For 31439/31439 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 17192 event pairs, 897 based on Foata normal form. 2/3580 useless extension candidates. Maximal degree in co-relation 18034. Up to 3558 conditions per place. [2024-06-28 03:59:44,354 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 125 selfloop transitions, 8 changer transitions 0/136 dead transitions. [2024-06-28 03:59:44,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 136 transitions, 1548 flow [2024-06-28 03:59:44,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 03:59:44,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 03:59:44,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 76 transitions. [2024-06-28 03:59:44,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37073170731707317 [2024-06-28 03:59:44,356 INFO L175 Difference]: Start difference. First operand has 100 places, 124 transitions, 1249 flow. Second operand 5 states and 76 transitions. [2024-06-28 03:59:44,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 136 transitions, 1548 flow [2024-06-28 03:59:44,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 136 transitions, 1425 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-28 03:59:44,411 INFO L231 Difference]: Finished difference. Result has 101 places, 125 transitions, 1161 flow [2024-06-28 03:59:44,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1126, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1161, PETRI_PLACES=101, PETRI_TRANSITIONS=125} [2024-06-28 03:59:44,425 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 59 predicate places. [2024-06-28 03:59:44,425 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 125 transitions, 1161 flow [2024-06-28 03:59:44,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:59:44,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:59:44,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:59:44,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-28 03:59:44,426 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:59:44,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:59:44,426 INFO L85 PathProgramCache]: Analyzing trace with hash -24413685, now seen corresponding path program 1 times [2024-06-28 03:59:44,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:59:44,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749081066] [2024-06-28 03:59:44,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:59:44,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:59:44,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:59:47,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:59:47,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:59:47,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749081066] [2024-06-28 03:59:47,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749081066] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:59:47,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:59:47,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:59:47,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335875433] [2024-06-28 03:59:47,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:59:47,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:59:47,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:59:47,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:59:47,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:59:47,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-28 03:59:47,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 125 transitions, 1161 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:59:47,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:59:47,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-28 03:59:47,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:59:48,655 INFO L124 PetriNetUnfolderBase]: 2447/3614 cut-off events. [2024-06-28 03:59:48,655 INFO L125 PetriNetUnfolderBase]: For 32796/32815 co-relation queries the response was YES. [2024-06-28 03:59:48,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17953 conditions, 3614 events. 2447/3614 cut-off events. For 32796/32815 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 17366 event pairs, 649 based on Foata normal form. 22/3636 useless extension candidates. Maximal degree in co-relation 17904. Up to 3361 conditions per place. [2024-06-28 03:59:48,677 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 136 selfloop transitions, 23 changer transitions 0/162 dead transitions. [2024-06-28 03:59:48,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 162 transitions, 1683 flow [2024-06-28 03:59:48,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:59:48,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:59:48,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-28 03:59:48,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-28 03:59:48,682 INFO L175 Difference]: Start difference. First operand has 101 places, 125 transitions, 1161 flow. Second operand 7 states and 119 transitions. [2024-06-28 03:59:48,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 162 transitions, 1683 flow [2024-06-28 03:59:48,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 162 transitions, 1665 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-28 03:59:48,716 INFO L231 Difference]: Finished difference. Result has 105 places, 129 transitions, 1272 flow [2024-06-28 03:59:48,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1143, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1272, PETRI_PLACES=105, PETRI_TRANSITIONS=129} [2024-06-28 03:59:48,717 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 63 predicate places. [2024-06-28 03:59:48,717 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 129 transitions, 1272 flow [2024-06-28 03:59:48,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:59:48,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:59:48,717 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:59:48,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-28 03:59:48,717 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)] === [2024-06-28 03:59:48,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:59:48,718 INFO L85 PathProgramCache]: Analyzing trace with hash -704973519, now seen corresponding path program 2 times [2024-06-28 03:59:48,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:59:48,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484047816] [2024-06-28 03:59:48,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:59:48,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:59:48,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:59:51,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:59:51,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:59:51,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484047816] [2024-06-28 03:59:51,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484047816] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:59:51,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:59:51,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:59:51,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55436991] [2024-06-28 03:59:51,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:59:51,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:59:51,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:59:51,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:59:51,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:59:51,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-28 03:59:51,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 129 transitions, 1272 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:59:51,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:59:51,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-28 03:59:51,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:59:52,838 INFO L124 PetriNetUnfolderBase]: 2467/3646 cut-off events. [2024-06-28 03:59:52,838 INFO L125 PetriNetUnfolderBase]: For 37385/37404 co-relation queries the response was YES. [2024-06-28 03:59:52,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18602 conditions, 3646 events. 2467/3646 cut-off events. For 37385/37404 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 17603 event pairs, 753 based on Foata normal form. 22/3668 useless extension candidates. Maximal degree in co-relation 18552. Up to 3471 conditions per place. [2024-06-28 03:59:52,863 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 139 selfloop transitions, 20 changer transitions 0/162 dead transitions. [2024-06-28 03:59:52,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 162 transitions, 1704 flow [2024-06-28 03:59:52,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:59:52,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:59:52,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-28 03:59:52,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4076655052264808 [2024-06-28 03:59:52,865 INFO L175 Difference]: Start difference. First operand has 105 places, 129 transitions, 1272 flow. Second operand 7 states and 117 transitions. [2024-06-28 03:59:52,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 162 transitions, 1704 flow [2024-06-28 03:59:52,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 162 transitions, 1628 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-28 03:59:52,916 INFO L231 Difference]: Finished difference. Result has 109 places, 131 transitions, 1287 flow [2024-06-28 03:59:52,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1208, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1287, PETRI_PLACES=109, PETRI_TRANSITIONS=131} [2024-06-28 03:59:52,916 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 67 predicate places. [2024-06-28 03:59:52,917 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 131 transitions, 1287 flow [2024-06-28 03:59:52,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:59:52,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:59:52,917 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:59:52,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-28 03:59:52,917 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)] === [2024-06-28 03:59:52,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:59:52,918 INFO L85 PathProgramCache]: Analyzing trace with hash 876452777, now seen corresponding path program 3 times [2024-06-28 03:59:52,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:59:52,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583568518] [2024-06-28 03:59:52,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:59:52,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:59:52,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:59:55,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:59:55,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:59:55,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583568518] [2024-06-28 03:59:55,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583568518] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:59:55,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:59:55,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:59:55,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687656988] [2024-06-28 03:59:55,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:59:55,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:59:55,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:59:55,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:59:55,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:59:55,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-28 03:59:55,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 131 transitions, 1287 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:59:55,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:59:55,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-28 03:59:55,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:59:56,918 INFO L124 PetriNetUnfolderBase]: 2459/3632 cut-off events. [2024-06-28 03:59:56,919 INFO L125 PetriNetUnfolderBase]: For 39927/39935 co-relation queries the response was YES. [2024-06-28 03:59:56,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18624 conditions, 3632 events. 2459/3632 cut-off events. For 39927/39935 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 17599 event pairs, 893 based on Foata normal form. 12/3644 useless extension candidates. Maximal degree in co-relation 18572. Up to 3525 conditions per place. [2024-06-28 03:59:56,939 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 138 selfloop transitions, 16 changer transitions 0/157 dead transitions. [2024-06-28 03:59:56,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 157 transitions, 1657 flow [2024-06-28 03:59:56,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:59:56,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:59:56,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-28 03:59:56,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3867595818815331 [2024-06-28 03:59:56,941 INFO L175 Difference]: Start difference. First operand has 109 places, 131 transitions, 1287 flow. Second operand 7 states and 111 transitions. [2024-06-28 03:59:56,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 157 transitions, 1657 flow [2024-06-28 03:59:56,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 157 transitions, 1582 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-28 03:59:56,989 INFO L231 Difference]: Finished difference. Result has 111 places, 131 transitions, 1251 flow [2024-06-28 03:59:56,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1212, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1251, PETRI_PLACES=111, PETRI_TRANSITIONS=131} [2024-06-28 03:59:56,989 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 69 predicate places. [2024-06-28 03:59:56,990 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 131 transitions, 1251 flow [2024-06-28 03:59:56,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:59:56,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:59:56,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:59:56,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-28 03:59:56,990 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)] === [2024-06-28 03:59:56,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:59:56,991 INFO L85 PathProgramCache]: Analyzing trace with hash 267113615, now seen corresponding path program 1 times [2024-06-28 03:59:56,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:59:56,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299498172] [2024-06-28 03:59:56,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:59:56,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:59:57,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:59:59,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:59:59,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:59:59,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299498172] [2024-06-28 03:59:59,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299498172] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:59:59,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:59:59,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:59:59,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664086888] [2024-06-28 03:59:59,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:59:59,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:59:59,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:59:59,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:59:59,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:59:59,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-28 03:59:59,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 131 transitions, 1251 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:59:59,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:59:59,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-28 03:59:59,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:00:01,649 INFO L124 PetriNetUnfolderBase]: 2539/3760 cut-off events. [2024-06-28 04:00:01,650 INFO L125 PetriNetUnfolderBase]: For 45552/45560 co-relation queries the response was YES. [2024-06-28 04:00:01,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19249 conditions, 3760 events. 2539/3760 cut-off events. For 45552/45560 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 18280 event pairs, 692 based on Foata normal form. 24/3784 useless extension candidates. Maximal degree in co-relation 19196. Up to 3330 conditions per place. [2024-06-28 04:00:01,674 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 132 selfloop transitions, 37 changer transitions 0/172 dead transitions. [2024-06-28 04:00:01,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 172 transitions, 1795 flow [2024-06-28 04:00:01,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:00:01,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:00:01,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-28 04:00:01,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4010840108401084 [2024-06-28 04:00:01,676 INFO L175 Difference]: Start difference. First operand has 111 places, 131 transitions, 1251 flow. Second operand 9 states and 148 transitions. [2024-06-28 04:00:01,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 172 transitions, 1795 flow [2024-06-28 04:00:01,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 172 transitions, 1751 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-28 04:00:01,722 INFO L231 Difference]: Finished difference. Result has 114 places, 133 transitions, 1331 flow [2024-06-28 04:00:01,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1207, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1331, PETRI_PLACES=114, PETRI_TRANSITIONS=133} [2024-06-28 04:00:01,722 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 72 predicate places. [2024-06-28 04:00:01,723 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 133 transitions, 1331 flow [2024-06-28 04:00:01,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:00:01,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:00:01,723 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:00:01,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-28 04:00:01,723 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:00:01,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:00:01,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1245206617, now seen corresponding path program 2 times [2024-06-28 04:00:01,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:00:01,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230550118] [2024-06-28 04:00:01,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:00:01,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:00:01,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:00:05,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:00:05,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:00:05,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230550118] [2024-06-28 04:00:05,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230550118] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:00:05,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:00:05,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:00:05,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611148665] [2024-06-28 04:00:05,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:00:05,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:00:05,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:00:05,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:00:05,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:00:05,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-28 04:00:05,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 133 transitions, 1331 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:00:05,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:00:05,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-28 04:00:05,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:00:06,966 INFO L124 PetriNetUnfolderBase]: 2619/3888 cut-off events. [2024-06-28 04:00:06,967 INFO L125 PetriNetUnfolderBase]: For 51438/51446 co-relation queries the response was YES. [2024-06-28 04:00:06,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20467 conditions, 3888 events. 2619/3888 cut-off events. For 51438/51446 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 19052 event pairs, 655 based on Foata normal form. 24/3912 useless extension candidates. Maximal degree in co-relation 20413. Up to 3404 conditions per place. [2024-06-28 04:00:07,001 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 133 selfloop transitions, 44 changer transitions 0/180 dead transitions. [2024-06-28 04:00:07,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 180 transitions, 1949 flow [2024-06-28 04:00:07,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:00:07,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:00:07,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-28 04:00:07,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420731707317073 [2024-06-28 04:00:07,003 INFO L175 Difference]: Start difference. First operand has 114 places, 133 transitions, 1331 flow. Second operand 8 states and 145 transitions. [2024-06-28 04:00:07,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 180 transitions, 1949 flow [2024-06-28 04:00:07,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 180 transitions, 1857 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-28 04:00:07,065 INFO L231 Difference]: Finished difference. Result has 115 places, 135 transitions, 1377 flow [2024-06-28 04:00:07,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1239, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1377, PETRI_PLACES=115, PETRI_TRANSITIONS=135} [2024-06-28 04:00:07,066 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 73 predicate places. [2024-06-28 04:00:07,066 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 135 transitions, 1377 flow [2024-06-28 04:00:07,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:00:07,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:00:07,066 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:00:07,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-28 04:00:07,067 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:00:07,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:00:07,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1244909947, now seen corresponding path program 3 times [2024-06-28 04:00:07,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:00:07,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422353597] [2024-06-28 04:00:07,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:00:07,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:00:07,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:00:10,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:00:10,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:00:10,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422353597] [2024-06-28 04:00:10,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422353597] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:00:10,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:00:10,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:00:10,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241802003] [2024-06-28 04:00:10,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:00:10,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:00:10,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:00:10,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:00:10,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:00:10,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-28 04:00:10,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 135 transitions, 1377 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:00:10,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:00:10,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-28 04:00:10,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:00:11,583 INFO L124 PetriNetUnfolderBase]: 2743/4080 cut-off events. [2024-06-28 04:00:11,583 INFO L125 PetriNetUnfolderBase]: For 58509/58517 co-relation queries the response was YES. [2024-06-28 04:00:11,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21740 conditions, 4080 events. 2743/4080 cut-off events. For 58509/58517 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 20298 event pairs, 641 based on Foata normal form. 24/4104 useless extension candidates. Maximal degree in co-relation 21685. Up to 3200 conditions per place. [2024-06-28 04:00:11,608 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 135 selfloop transitions, 50 changer transitions 0/188 dead transitions. [2024-06-28 04:00:11,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 188 transitions, 2097 flow [2024-06-28 04:00:11,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:00:11,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:00:11,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-28 04:00:11,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45426829268292684 [2024-06-28 04:00:11,610 INFO L175 Difference]: Start difference. First operand has 115 places, 135 transitions, 1377 flow. Second operand 8 states and 149 transitions. [2024-06-28 04:00:11,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 188 transitions, 2097 flow [2024-06-28 04:00:11,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 188 transitions, 1981 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-28 04:00:11,664 INFO L231 Difference]: Finished difference. Result has 117 places, 138 transitions, 1426 flow [2024-06-28 04:00:11,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1261, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1426, PETRI_PLACES=117, PETRI_TRANSITIONS=138} [2024-06-28 04:00:11,665 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 75 predicate places. [2024-06-28 04:00:11,665 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 138 transitions, 1426 flow [2024-06-28 04:00:11,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:00:11,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:00:11,666 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:00:11,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-28 04:00:11,666 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:00:11,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:00:11,666 INFO L85 PathProgramCache]: Analyzing trace with hash -464331454, now seen corresponding path program 1 times [2024-06-28 04:00:11,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:00:11,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929509508] [2024-06-28 04:00:11,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:00:11,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:00:11,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:00:14,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:00:14,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:00:14,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929509508] [2024-06-28 04:00:14,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929509508] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:00:14,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:00:14,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 04:00:14,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135265422] [2024-06-28 04:00:14,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:00:14,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 04:00:14,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:00:14,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 04:00:14,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-28 04:00:15,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-28 04:00:15,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 138 transitions, 1426 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:00:15,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:00:15,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-28 04:00:15,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:00:17,404 INFO L124 PetriNetUnfolderBase]: 3847/5846 cut-off events. [2024-06-28 04:00:17,404 INFO L125 PetriNetUnfolderBase]: For 109062/109081 co-relation queries the response was YES. [2024-06-28 04:00:17,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31295 conditions, 5846 events. 3847/5846 cut-off events. For 109062/109081 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 32160 event pairs, 817 based on Foata normal form. 82/5928 useless extension candidates. Maximal degree in co-relation 31239. Up to 2728 conditions per place. [2024-06-28 04:00:17,435 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 166 selfloop transitions, 55 changer transitions 0/224 dead transitions. [2024-06-28 04:00:17,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 224 transitions, 2422 flow [2024-06-28 04:00:17,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:00:17,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:00:17,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 199 transitions. [2024-06-28 04:00:17,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4853658536585366 [2024-06-28 04:00:17,437 INFO L175 Difference]: Start difference. First operand has 117 places, 138 transitions, 1426 flow. Second operand 10 states and 199 transitions. [2024-06-28 04:00:17,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 224 transitions, 2422 flow [2024-06-28 04:00:17,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 224 transitions, 2331 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-28 04:00:17,544 INFO L231 Difference]: Finished difference. Result has 125 places, 141 transitions, 1543 flow [2024-06-28 04:00:17,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1335, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1543, PETRI_PLACES=125, PETRI_TRANSITIONS=141} [2024-06-28 04:00:17,545 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 83 predicate places. [2024-06-28 04:00:17,545 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 141 transitions, 1543 flow [2024-06-28 04:00:17,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:00:17,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:00:17,545 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:00:17,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-28 04:00:17,545 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:00:17,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:00:17,546 INFO L85 PathProgramCache]: Analyzing trace with hash -457235520, now seen corresponding path program 2 times [2024-06-28 04:00:17,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:00:17,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258832410] [2024-06-28 04:00:17,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:00:17,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:00:17,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:00:20,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:00:20,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:00:20,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258832410] [2024-06-28 04:00:20,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258832410] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:00:20,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:00:20,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 04:00:20,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259396011] [2024-06-28 04:00:20,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:00:20,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 04:00:20,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:00:20,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 04:00:20,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-28 04:00:20,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-28 04:00:20,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 141 transitions, 1543 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:00:20,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:00:20,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-28 04:00:20,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:00:23,469 INFO L124 PetriNetUnfolderBase]: 4203/6442 cut-off events. [2024-06-28 04:00:23,469 INFO L125 PetriNetUnfolderBase]: For 130410/130429 co-relation queries the response was YES. [2024-06-28 04:00:23,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34494 conditions, 6442 events. 4203/6442 cut-off events. For 130410/130429 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 36630 event pairs, 1213 based on Foata normal form. 98/6540 useless extension candidates. Maximal degree in co-relation 34434. Up to 4906 conditions per place. [2024-06-28 04:00:23,505 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 153 selfloop transitions, 55 changer transitions 0/211 dead transitions. [2024-06-28 04:00:23,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 211 transitions, 2299 flow [2024-06-28 04:00:23,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 04:00:23,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 04:00:23,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 199 transitions. [2024-06-28 04:00:23,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44124168514412415 [2024-06-28 04:00:23,507 INFO L175 Difference]: Start difference. First operand has 125 places, 141 transitions, 1543 flow. Second operand 11 states and 199 transitions. [2024-06-28 04:00:23,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 211 transitions, 2299 flow [2024-06-28 04:00:23,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 211 transitions, 2183 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-28 04:00:23,623 INFO L231 Difference]: Finished difference. Result has 130 places, 142 transitions, 1581 flow [2024-06-28 04:00:23,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1427, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1581, PETRI_PLACES=130, PETRI_TRANSITIONS=142} [2024-06-28 04:00:23,624 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 88 predicate places. [2024-06-28 04:00:23,624 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 142 transitions, 1581 flow [2024-06-28 04:00:23,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:00:23,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:00:23,625 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:00:23,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-28 04:00:23,625 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:00:23,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:00:23,625 INFO L85 PathProgramCache]: Analyzing trace with hash -379340614, now seen corresponding path program 3 times [2024-06-28 04:00:23,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:00:23,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016298494] [2024-06-28 04:00:23,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:00:23,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:00:23,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:00:27,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:00:27,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:00:27,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016298494] [2024-06-28 04:00:27,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016298494] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:00:27,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:00:27,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 04:00:27,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377055610] [2024-06-28 04:00:27,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:00:27,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 04:00:27,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:00:27,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 04:00:27,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-28 04:00:27,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-28 04:00:27,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 142 transitions, 1581 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:00:27,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:00:27,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-28 04:00:27,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:00:29,621 INFO L124 PetriNetUnfolderBase]: 4851/7486 cut-off events. [2024-06-28 04:00:29,621 INFO L125 PetriNetUnfolderBase]: For 153011/153030 co-relation queries the response was YES. [2024-06-28 04:00:29,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39955 conditions, 7486 events. 4851/7486 cut-off events. For 153011/153030 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 44240 event pairs, 1431 based on Foata normal form. 82/7568 useless extension candidates. Maximal degree in co-relation 39894. Up to 4796 conditions per place. [2024-06-28 04:00:29,788 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 166 selfloop transitions, 55 changer transitions 0/224 dead transitions. [2024-06-28 04:00:29,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 224 transitions, 2479 flow [2024-06-28 04:00:29,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 04:00:29,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 04:00:29,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 209 transitions. [2024-06-28 04:00:29,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-28 04:00:29,790 INFO L175 Difference]: Start difference. First operand has 130 places, 142 transitions, 1581 flow. Second operand 11 states and 209 transitions. [2024-06-28 04:00:29,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 224 transitions, 2479 flow [2024-06-28 04:00:29,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 224 transitions, 2345 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-28 04:00:29,924 INFO L231 Difference]: Finished difference. Result has 133 places, 144 transitions, 1630 flow [2024-06-28 04:00:29,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1447, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1630, PETRI_PLACES=133, PETRI_TRANSITIONS=144} [2024-06-28 04:00:29,925 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 91 predicate places. [2024-06-28 04:00:29,925 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 144 transitions, 1630 flow [2024-06-28 04:00:29,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:00:29,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:00:29,925 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:00:29,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-28 04:00:29,925 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:00:29,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:00:29,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1400238026, now seen corresponding path program 4 times [2024-06-28 04:00:29,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:00:29,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763876641] [2024-06-28 04:00:29,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:00:29,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:00:29,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:00:33,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:00:33,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:00:33,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763876641] [2024-06-28 04:00:33,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763876641] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:00:33,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:00:33,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 04:00:33,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846454497] [2024-06-28 04:00:33,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:00:33,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 04:00:33,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:00:33,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 04:00:33,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-28 04:00:33,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-28 04:00:33,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 144 transitions, 1630 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:00:33,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:00:33,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-28 04:00:33,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:00:35,624 INFO L124 PetriNetUnfolderBase]: 5207/8080 cut-off events. [2024-06-28 04:00:35,624 INFO L125 PetriNetUnfolderBase]: For 174464/174472 co-relation queries the response was YES. [2024-06-28 04:00:35,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42561 conditions, 8080 events. 5207/8080 cut-off events. For 174464/174472 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 48912 event pairs, 2148 based on Foata normal form. 88/8168 useless extension candidates. Maximal degree in co-relation 42498. Up to 6850 conditions per place. [2024-06-28 04:00:35,685 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 155 selfloop transitions, 43 changer transitions 0/201 dead transitions. [2024-06-28 04:00:35,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 201 transitions, 2352 flow [2024-06-28 04:00:35,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:00:35,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:00:35,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 174 transitions. [2024-06-28 04:00:35,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.424390243902439 [2024-06-28 04:00:35,687 INFO L175 Difference]: Start difference. First operand has 133 places, 144 transitions, 1630 flow. Second operand 10 states and 174 transitions. [2024-06-28 04:00:35,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 201 transitions, 2352 flow [2024-06-28 04:00:35,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 201 transitions, 2217 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-28 04:00:35,884 INFO L231 Difference]: Finished difference. Result has 135 places, 145 transitions, 1629 flow [2024-06-28 04:00:35,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1495, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1629, PETRI_PLACES=135, PETRI_TRANSITIONS=145} [2024-06-28 04:00:35,884 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 93 predicate places. [2024-06-28 04:00:35,884 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 145 transitions, 1629 flow [2024-06-28 04:00:35,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:00:35,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:00:35,885 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:00:35,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-28 04:00:35,885 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:00:35,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:00:35,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1090988708, now seen corresponding path program 1 times [2024-06-28 04:00:35,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:00:35,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809499483] [2024-06-28 04:00:35,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:00:35,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:00:35,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:00:39,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:00:39,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:00:39,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809499483] [2024-06-28 04:00:39,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809499483] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:00:39,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:00:39,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 04:00:39,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292592219] [2024-06-28 04:00:39,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:00:39,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 04:00:39,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:00:39,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 04:00:39,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-28 04:00:39,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-28 04:00:39,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 145 transitions, 1629 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:00:39,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:00:39,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-28 04:00:39,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:00:42,228 INFO L124 PetriNetUnfolderBase]: 5507/8588 cut-off events. [2024-06-28 04:00:42,228 INFO L125 PetriNetUnfolderBase]: For 187623/187631 co-relation queries the response was YES. [2024-06-28 04:00:42,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44260 conditions, 8588 events. 5507/8588 cut-off events. For 187623/187631 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 52978 event pairs, 2274 based on Foata normal form. 88/8676 useless extension candidates. Maximal degree in co-relation 44196. Up to 7358 conditions per place. [2024-06-28 04:00:42,283 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 162 selfloop transitions, 48 changer transitions 0/213 dead transitions. [2024-06-28 04:00:42,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 213 transitions, 2407 flow [2024-06-28 04:00:42,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 04:00:42,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 04:00:42,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 205 transitions. [2024-06-28 04:00:42,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-28 04:00:42,285 INFO L175 Difference]: Start difference. First operand has 135 places, 145 transitions, 1629 flow. Second operand 12 states and 205 transitions. [2024-06-28 04:00:42,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 213 transitions, 2407 flow [2024-06-28 04:00:42,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 213 transitions, 2293 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-28 04:00:42,472 INFO L231 Difference]: Finished difference. Result has 139 places, 146 transitions, 1661 flow [2024-06-28 04:00:42,473 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1515, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1661, PETRI_PLACES=139, PETRI_TRANSITIONS=146} [2024-06-28 04:00:42,473 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 97 predicate places. [2024-06-28 04:00:42,473 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 146 transitions, 1661 flow [2024-06-28 04:00:42,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:00:42,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:00:42,474 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:00:42,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-28 04:00:42,474 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:00:42,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:00:42,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1090981268, now seen corresponding path program 2 times [2024-06-28 04:00:42,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:00:42,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873897976] [2024-06-28 04:00:42,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:00:42,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:00:42,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:00:45,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:00:45,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:00:45,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873897976] [2024-06-28 04:00:45,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873897976] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:00:45,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:00:45,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 04:00:45,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134410994] [2024-06-28 04:00:45,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:00:45,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 04:00:45,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:00:45,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 04:00:45,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-28 04:00:45,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-28 04:00:45,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 146 transitions, 1661 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:00:45,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:00:45,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-28 04:00:45,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:00:48,551 INFO L124 PetriNetUnfolderBase]: 5779/9052 cut-off events. [2024-06-28 04:00:48,552 INFO L125 PetriNetUnfolderBase]: For 197823/197831 co-relation queries the response was YES. [2024-06-28 04:00:48,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46143 conditions, 9052 events. 5779/9052 cut-off events. For 197823/197831 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 56699 event pairs, 1992 based on Foata normal form. 72/9124 useless extension candidates. Maximal degree in co-relation 46078. Up to 6506 conditions per place. [2024-06-28 04:00:48,607 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 163 selfloop transitions, 54 changer transitions 0/220 dead transitions. [2024-06-28 04:00:48,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 220 transitions, 2497 flow [2024-06-28 04:00:48,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 04:00:48,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 04:00:48,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 210 transitions. [2024-06-28 04:00:48,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-28 04:00:48,609 INFO L175 Difference]: Start difference. First operand has 139 places, 146 transitions, 1661 flow. Second operand 12 states and 210 transitions. [2024-06-28 04:00:48,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 220 transitions, 2497 flow [2024-06-28 04:00:48,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 220 transitions, 2371 flow, removed 17 selfloop flow, removed 10 redundant places. [2024-06-28 04:00:48,821 INFO L231 Difference]: Finished difference. Result has 141 places, 147 transitions, 1693 flow [2024-06-28 04:00:48,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1535, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1693, PETRI_PLACES=141, PETRI_TRANSITIONS=147} [2024-06-28 04:00:48,821 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 99 predicate places. [2024-06-28 04:00:48,822 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 147 transitions, 1693 flow [2024-06-28 04:00:48,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:00:48,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:00:48,822 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:00:48,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-28 04:00:48,822 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:00:48,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:00:48,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1096706720, now seen corresponding path program 5 times [2024-06-28 04:00:48,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:00:48,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617367855] [2024-06-28 04:00:48,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:00:48,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:00:48,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:00:52,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:00:52,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:00:52,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617367855] [2024-06-28 04:00:52,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617367855] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:00:52,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:00:52,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 04:00:52,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663952197] [2024-06-28 04:00:52,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:00:52,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 04:00:52,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:00:52,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 04:00:52,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-28 04:00:52,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-28 04:00:52,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 147 transitions, 1693 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:00:52,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:00:52,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-28 04:00:52,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:00:54,384 INFO L124 PetriNetUnfolderBase]: 5955/9356 cut-off events. [2024-06-28 04:00:54,385 INFO L125 PetriNetUnfolderBase]: For 202015/202023 co-relation queries the response was YES. [2024-06-28 04:00:54,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46814 conditions, 9356 events. 5955/9356 cut-off events. For 202015/202023 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 59144 event pairs, 2332 based on Foata normal form. 72/9428 useless extension candidates. Maximal degree in co-relation 46748. Up to 6316 conditions per place. [2024-06-28 04:00:54,454 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 167 selfloop transitions, 42 changer transitions 0/212 dead transitions. [2024-06-28 04:00:54,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 212 transitions, 2569 flow [2024-06-28 04:00:54,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:00:54,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:00:54,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 179 transitions. [2024-06-28 04:00:54,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43658536585365854 [2024-06-28 04:00:54,456 INFO L175 Difference]: Start difference. First operand has 141 places, 147 transitions, 1693 flow. Second operand 10 states and 179 transitions. [2024-06-28 04:00:54,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 212 transitions, 2569 flow [2024-06-28 04:00:54,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 212 transitions, 2427 flow, removed 18 selfloop flow, removed 10 redundant places. [2024-06-28 04:00:54,708 INFO L231 Difference]: Finished difference. Result has 142 places, 149 transitions, 1721 flow [2024-06-28 04:00:54,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1551, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1721, PETRI_PLACES=142, PETRI_TRANSITIONS=149} [2024-06-28 04:00:54,708 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 100 predicate places. [2024-06-28 04:00:54,708 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 149 transitions, 1721 flow [2024-06-28 04:00:54,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:00:54,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:00:54,709 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:00:54,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-28 04:00:54,709 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)] === [2024-06-28 04:00:54,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:00:54,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1759799638, now seen corresponding path program 1 times [2024-06-28 04:00:54,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:00:54,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607358604] [2024-06-28 04:00:54,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:00:54,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:00:54,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:00:55,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:00:55,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:00:55,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607358604] [2024-06-28 04:00:55,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607358604] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:00:55,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:00:55,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 04:00:55,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164499610] [2024-06-28 04:00:55,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:00:55,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 04:00:55,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:00:55,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 04:00:55,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 04:00:55,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-28 04:00:55,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 149 transitions, 1721 flow. Second operand has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:00:55,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:00:55,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-28 04:00:55,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:00:57,782 INFO L124 PetriNetUnfolderBase]: 5949/9348 cut-off events. [2024-06-28 04:00:57,782 INFO L125 PetriNetUnfolderBase]: For 192725/192733 co-relation queries the response was YES. [2024-06-28 04:00:57,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46882 conditions, 9348 events. 5949/9348 cut-off events. For 192725/192733 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 59529 event pairs, 3122 based on Foata normal form. 10/9358 useless extension candidates. Maximal degree in co-relation 46814. Up to 9301 conditions per place. [2024-06-28 04:00:57,841 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 144 selfloop transitions, 13 changer transitions 0/160 dead transitions. [2024-06-28 04:00:57,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 160 transitions, 2061 flow [2024-06-28 04:00:57,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 04:00:57,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 04:00:57,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 78 transitions. [2024-06-28 04:00:57,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3804878048780488 [2024-06-28 04:00:57,843 INFO L175 Difference]: Start difference. First operand has 142 places, 149 transitions, 1721 flow. Second operand 5 states and 78 transitions. [2024-06-28 04:00:57,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 160 transitions, 2061 flow [2024-06-28 04:00:58,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 160 transitions, 1935 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-28 04:00:58,127 INFO L231 Difference]: Finished difference. Result has 140 places, 149 transitions, 1631 flow [2024-06-28 04:00:58,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1595, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1631, PETRI_PLACES=140, PETRI_TRANSITIONS=149} [2024-06-28 04:00:58,128 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 98 predicate places. [2024-06-28 04:00:58,128 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 149 transitions, 1631 flow [2024-06-28 04:00:58,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:00:58,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:00:58,128 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:00:58,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-28 04:00:58,129 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:00:58,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:00:58,129 INFO L85 PathProgramCache]: Analyzing trace with hash -203413366, now seen corresponding path program 6 times [2024-06-28 04:00:58,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:00:58,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652186794] [2024-06-28 04:00:58,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:00:58,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:00:58,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:01:01,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:01:01,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:01:01,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652186794] [2024-06-28 04:01:01,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652186794] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:01:01,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:01:01,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 04:01:01,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291071095] [2024-06-28 04:01:01,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:01:01,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 04:01:01,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:01:01,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 04:01:01,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-28 04:01:01,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-28 04:01:01,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 149 transitions, 1631 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:01:01,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:01:01,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-28 04:01:01,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:01:03,856 INFO L124 PetriNetUnfolderBase]: 6249/9856 cut-off events. [2024-06-28 04:01:03,857 INFO L125 PetriNetUnfolderBase]: For 230416/230424 co-relation queries the response was YES. [2024-06-28 04:01:03,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48187 conditions, 9856 events. 6249/9856 cut-off events. For 230416/230424 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 63517 event pairs, 2548 based on Foata normal form. 88/9944 useless extension candidates. Maximal degree in co-relation 48118. Up to 8197 conditions per place. [2024-06-28 04:01:03,929 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 153 selfloop transitions, 68 changer transitions 0/224 dead transitions. [2024-06-28 04:01:03,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 224 transitions, 2589 flow [2024-06-28 04:01:03,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 04:01:03,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 04:01:03,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 204 transitions. [2024-06-28 04:01:03,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523281596452328 [2024-06-28 04:01:03,931 INFO L175 Difference]: Start difference. First operand has 140 places, 149 transitions, 1631 flow. Second operand 11 states and 204 transitions. [2024-06-28 04:01:03,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 224 transitions, 2589 flow [2024-06-28 04:01:04,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 224 transitions, 2547 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-28 04:01:04,140 INFO L231 Difference]: Finished difference. Result has 146 places, 150 transitions, 1791 flow [2024-06-28 04:01:04,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1599, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1791, PETRI_PLACES=146, PETRI_TRANSITIONS=150} [2024-06-28 04:01:04,141 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 104 predicate places. [2024-06-28 04:01:04,141 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 150 transitions, 1791 flow [2024-06-28 04:01:04,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:01:04,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:01:04,141 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:01:04,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-28 04:01:04,142 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:01:04,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:01:04,142 INFO L85 PathProgramCache]: Analyzing trace with hash -502523926, now seen corresponding path program 3 times [2024-06-28 04:01:04,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:01:04,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921170546] [2024-06-28 04:01:04,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:01:04,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:01:04,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:01:07,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:01:07,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:01:07,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921170546] [2024-06-28 04:01:07,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921170546] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:01:07,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:01:07,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 04:01:07,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052115512] [2024-06-28 04:01:07,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:01:07,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 04:01:07,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:01:07,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 04:01:07,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-28 04:01:07,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-28 04:01:07,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 150 transitions, 1791 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:01:07,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:01:07,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-28 04:01:07,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:01:10,226 INFO L124 PetriNetUnfolderBase]: 6521/10320 cut-off events. [2024-06-28 04:01:10,226 INFO L125 PetriNetUnfolderBase]: For 232185/232193 co-relation queries the response was YES. [2024-06-28 04:01:10,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50617 conditions, 10320 events. 6521/10320 cut-off events. For 232185/232193 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 67488 event pairs, 2540 based on Foata normal form. 72/10392 useless extension candidates. Maximal degree in co-relation 50548. Up to 8071 conditions per place. [2024-06-28 04:01:10,298 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 165 selfloop transitions, 73 changer transitions 0/241 dead transitions. [2024-06-28 04:01:10,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 241 transitions, 2860 flow [2024-06-28 04:01:10,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-28 04:01:10,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-28 04:01:10,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 234 transitions. [2024-06-28 04:01:10,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-28 04:01:10,300 INFO L175 Difference]: Start difference. First operand has 146 places, 150 transitions, 1791 flow. Second operand 13 states and 234 transitions. [2024-06-28 04:01:10,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 241 transitions, 2860 flow [2024-06-28 04:01:10,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 241 transitions, 2686 flow, removed 20 selfloop flow, removed 9 redundant places. [2024-06-28 04:01:10,600 INFO L231 Difference]: Finished difference. Result has 151 places, 153 transitions, 1841 flow [2024-06-28 04:01:10,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1619, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1841, PETRI_PLACES=151, PETRI_TRANSITIONS=153} [2024-06-28 04:01:10,600 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 109 predicate places. [2024-06-28 04:01:10,601 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 153 transitions, 1841 flow [2024-06-28 04:01:10,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:01:10,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:01:10,601 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:01:10,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-28 04:01:10,601 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:01:10,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:01:10,601 INFO L85 PathProgramCache]: Analyzing trace with hash 62499116, now seen corresponding path program 4 times [2024-06-28 04:01:10,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:01:10,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804118906] [2024-06-28 04:01:10,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:01:10,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:01:10,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:01:13,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:01:13,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:01:13,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804118906] [2024-06-28 04:01:13,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804118906] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:01:13,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:01:13,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 04:01:13,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504115266] [2024-06-28 04:01:13,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:01:13,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 04:01:13,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:01:13,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 04:01:13,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-28 04:01:13,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-28 04:01:13,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 153 transitions, 1841 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:01:13,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:01:13,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-28 04:01:13,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:01:16,507 INFO L124 PetriNetUnfolderBase]: 7001/11096 cut-off events. [2024-06-28 04:01:16,507 INFO L125 PetriNetUnfolderBase]: For 260192/260200 co-relation queries the response was YES. [2024-06-28 04:01:16,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54017 conditions, 11096 events. 7001/11096 cut-off events. For 260192/260200 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 72989 event pairs, 2425 based on Foata normal form. 72/11168 useless extension candidates. Maximal degree in co-relation 53946. Up to 5651 conditions per place. [2024-06-28 04:01:16,574 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 154 selfloop transitions, 79 changer transitions 0/236 dead transitions. [2024-06-28 04:01:16,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 236 transitions, 2847 flow [2024-06-28 04:01:16,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 04:01:16,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 04:01:16,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 211 transitions. [2024-06-28 04:01:16,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4678492239467849 [2024-06-28 04:01:16,576 INFO L175 Difference]: Start difference. First operand has 151 places, 153 transitions, 1841 flow. Second operand 11 states and 211 transitions. [2024-06-28 04:01:16,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 236 transitions, 2847 flow [2024-06-28 04:01:16,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 236 transitions, 2663 flow, removed 21 selfloop flow, removed 10 redundant places. [2024-06-28 04:01:16,850 INFO L231 Difference]: Finished difference. Result has 151 places, 152 transitions, 1761 flow [2024-06-28 04:01:16,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1599, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1761, PETRI_PLACES=151, PETRI_TRANSITIONS=152} [2024-06-28 04:01:16,850 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 109 predicate places. [2024-06-28 04:01:16,850 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 152 transitions, 1761 flow [2024-06-28 04:01:16,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:01:16,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:01:16,851 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:01:16,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-28 04:01:16,851 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)] === [2024-06-28 04:01:16,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:01:16,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1973549820, now seen corresponding path program 2 times [2024-06-28 04:01:16,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:01:16,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876835919] [2024-06-28 04:01:16,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:01:16,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:01:16,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:01:18,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:01:18,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:01:18,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876835919] [2024-06-28 04:01:18,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876835919] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:01:18,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:01:18,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 04:01:18,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31457873] [2024-06-28 04:01:18,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:01:18,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 04:01:18,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:01:18,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 04:01:18,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-28 04:01:18,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-28 04:01:18,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 152 transitions, 1761 flow. Second operand has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:01:18,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:01:18,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-28 04:01:18,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:01:20,376 INFO L124 PetriNetUnfolderBase]: 6995/11088 cut-off events. [2024-06-28 04:01:20,376 INFO L125 PetriNetUnfolderBase]: For 242358/242366 co-relation queries the response was YES. [2024-06-28 04:01:20,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54207 conditions, 11088 events. 6995/11088 cut-off events. For 242358/242366 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 73818 event pairs, 3888 based on Foata normal form. 10/11098 useless extension candidates. Maximal degree in co-relation 54135. Up to 11033 conditions per place. [2024-06-28 04:01:20,593 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 144 selfloop transitions, 17 changer transitions 0/164 dead transitions. [2024-06-28 04:01:20,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 164 transitions, 2111 flow [2024-06-28 04:01:20,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:01:20,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:01:20,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 88 transitions. [2024-06-28 04:01:20,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35772357723577236 [2024-06-28 04:01:20,595 INFO L175 Difference]: Start difference. First operand has 151 places, 152 transitions, 1761 flow. Second operand 6 states and 88 transitions. [2024-06-28 04:01:20,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 164 transitions, 2111 flow [2024-06-28 04:01:20,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 164 transitions, 1905 flow, removed 25 selfloop flow, removed 9 redundant places. [2024-06-28 04:01:20,821 INFO L231 Difference]: Finished difference. Result has 148 places, 152 transitions, 1595 flow [2024-06-28 04:01:20,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1555, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1595, PETRI_PLACES=148, PETRI_TRANSITIONS=152} [2024-06-28 04:01:20,821 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 106 predicate places. [2024-06-28 04:01:20,821 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 152 transitions, 1595 flow [2024-06-28 04:01:20,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:01:20,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:01:20,822 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:01:20,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-28 04:01:20,822 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)] === [2024-06-28 04:01:20,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:01:20,822 INFO L85 PathProgramCache]: Analyzing trace with hash -680933930, now seen corresponding path program 1 times [2024-06-28 04:01:20,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:01:20,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083618133] [2024-06-28 04:01:20,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:01:20,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:01:20,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:01:22,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:01:22,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:01:22,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083618133] [2024-06-28 04:01:22,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083618133] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:01:22,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:01:22,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 04:01:22,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434593444] [2024-06-28 04:01:22,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:01:22,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 04:01:22,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:01:22,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 04:01:22,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 04:01:22,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-28 04:01:22,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 152 transitions, 1595 flow. Second operand has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:01:22,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:01:22,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-28 04:01:22,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:01:25,014 INFO L124 PetriNetUnfolderBase]: 6689/10612 cut-off events. [2024-06-28 04:01:25,014 INFO L125 PetriNetUnfolderBase]: For 221089/221089 co-relation queries the response was YES. [2024-06-28 04:01:25,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50269 conditions, 10612 events. 6689/10612 cut-off events. For 221089/221089 co-relation queries the response was YES. Maximal size of possible extension queue 529. Compared 69761 event pairs, 3391 based on Foata normal form. 6/10618 useless extension candidates. Maximal degree in co-relation 50196. Up to 10500 conditions per place. [2024-06-28 04:01:25,092 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 155 selfloop transitions, 18 changer transitions 1/177 dead transitions. [2024-06-28 04:01:25,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 177 transitions, 2104 flow [2024-06-28 04:01:25,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:01:25,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:01:25,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 98 transitions. [2024-06-28 04:01:25,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3983739837398374 [2024-06-28 04:01:25,094 INFO L175 Difference]: Start difference. First operand has 148 places, 152 transitions, 1595 flow. Second operand 6 states and 98 transitions. [2024-06-28 04:01:25,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 177 transitions, 2104 flow [2024-06-28 04:01:25,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 177 transitions, 2052 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-28 04:01:25,293 INFO L231 Difference]: Finished difference. Result has 150 places, 155 transitions, 1633 flow [2024-06-28 04:01:25,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1543, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1633, PETRI_PLACES=150, PETRI_TRANSITIONS=155} [2024-06-28 04:01:25,293 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 108 predicate places. [2024-06-28 04:01:25,293 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 155 transitions, 1633 flow [2024-06-28 04:01:25,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:01:25,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:01:25,294 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:01:25,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-28 04:01:25,294 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)] === [2024-06-28 04:01:25,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:01:25,294 INFO L85 PathProgramCache]: Analyzing trace with hash -496634154, now seen corresponding path program 2 times [2024-06-28 04:01:25,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:01:25,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094750611] [2024-06-28 04:01:25,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:01:25,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:01:25,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:01:27,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:01:27,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:01:27,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094750611] [2024-06-28 04:01:27,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094750611] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:01:27,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:01:27,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 04:01:27,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206444932] [2024-06-28 04:01:27,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:01:27,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 04:01:27,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:01:27,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 04:01:27,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 04:01:27,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-28 04:01:27,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 155 transitions, 1633 flow. Second operand has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:01:27,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:01:27,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-28 04:01:27,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:01:29,187 INFO L124 PetriNetUnfolderBase]: 6431/10151 cut-off events. [2024-06-28 04:01:29,188 INFO L125 PetriNetUnfolderBase]: For 229875/229881 co-relation queries the response was YES. [2024-06-28 04:01:29,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48995 conditions, 10151 events. 6431/10151 cut-off events. For 229875/229881 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 65742 event pairs, 3167 based on Foata normal form. 8/10159 useless extension candidates. Maximal degree in co-relation 48921. Up to 10049 conditions per place. [2024-06-28 04:01:29,260 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 146 selfloop transitions, 17 changer transitions 5/171 dead transitions. [2024-06-28 04:01:29,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 171 transitions, 2008 flow [2024-06-28 04:01:29,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:01:29,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:01:29,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 93 transitions. [2024-06-28 04:01:29,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3780487804878049 [2024-06-28 04:01:29,261 INFO L175 Difference]: Start difference. First operand has 150 places, 155 transitions, 1633 flow. Second operand 6 states and 93 transitions. [2024-06-28 04:01:29,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 171 transitions, 2008 flow [2024-06-28 04:01:29,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 171 transitions, 1987 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-28 04:01:29,487 INFO L231 Difference]: Finished difference. Result has 153 places, 151 transitions, 1598 flow [2024-06-28 04:01:29,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1612, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1598, PETRI_PLACES=153, PETRI_TRANSITIONS=151} [2024-06-28 04:01:29,488 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 111 predicate places. [2024-06-28 04:01:29,488 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 151 transitions, 1598 flow [2024-06-28 04:01:29,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:01:29,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:01:29,488 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:01:29,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-28 04:01:29,488 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)] === [2024-06-28 04:01:29,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:01:29,489 INFO L85 PathProgramCache]: Analyzing trace with hash -526119308, now seen corresponding path program 1 times [2024-06-28 04:01:29,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:01:29,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816839724] [2024-06-28 04:01:29,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:01:29,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:01:29,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:01:32,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:01:32,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:01:32,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816839724] [2024-06-28 04:01:32,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816839724] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:01:32,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:01:32,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:01:32,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821474350] [2024-06-28 04:01:32,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:01:32,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:01:32,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:01:32,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:01:32,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:01:32,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-28 04:01:32,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 151 transitions, 1598 flow. Second operand has 9 states, 9 states have (on average 7.777777777777778) internal successors, (70), 9 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:01:32,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:01:32,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-28 04:01:32,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:01:34,142 INFO L124 PetriNetUnfolderBase]: 5722/9029 cut-off events. [2024-06-28 04:01:34,143 INFO L125 PetriNetUnfolderBase]: For 240284/240284 co-relation queries the response was YES. [2024-06-28 04:01:34,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45615 conditions, 9029 events. 5722/9029 cut-off events. For 240284/240284 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 57159 event pairs, 2996 based on Foata normal form. 2/9031 useless extension candidates. Maximal degree in co-relation 45540. Up to 9003 conditions per place. [2024-06-28 04:01:34,202 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 153 selfloop transitions, 10 changer transitions 0/166 dead transitions. [2024-06-28 04:01:34,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 166 transitions, 1977 flow [2024-06-28 04:01:34,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:01:34,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:01:34,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 85 transitions. [2024-06-28 04:01:34,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34552845528455284 [2024-06-28 04:01:34,203 INFO L175 Difference]: Start difference. First operand has 153 places, 151 transitions, 1598 flow. Second operand 6 states and 85 transitions. [2024-06-28 04:01:34,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 166 transitions, 1977 flow [2024-06-28 04:01:34,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 166 transitions, 1946 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-28 04:01:34,400 INFO L231 Difference]: Finished difference. Result has 156 places, 153 transitions, 1616 flow [2024-06-28 04:01:34,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1567, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1616, PETRI_PLACES=156, PETRI_TRANSITIONS=153} [2024-06-28 04:01:34,401 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 114 predicate places. [2024-06-28 04:01:34,401 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 153 transitions, 1616 flow [2024-06-28 04:01:34,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.777777777777778) internal successors, (70), 9 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:01:34,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:01:34,401 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:01:34,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-28 04:01:34,401 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)] === [2024-06-28 04:01:34,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:01:34,403 INFO L85 PathProgramCache]: Analyzing trace with hash 857767027, now seen corresponding path program 1 times [2024-06-28 04:01:34,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:01:34,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472183505] [2024-06-28 04:01:34,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:01:34,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:01:34,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:01:36,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:01:36,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:01:36,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472183505] [2024-06-28 04:01:36,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472183505] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:01:36,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:01:36,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:01:36,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292291246] [2024-06-28 04:01:36,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:01:36,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:01:36,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:01:36,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:01:36,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:01:36,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-28 04:01:36,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 153 transitions, 1616 flow. Second operand has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 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) [2024-06-28 04:01:36,157 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:01:36,157 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-28 04:01:36,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:01:38,170 INFO L124 PetriNetUnfolderBase]: 5742/9059 cut-off events. [2024-06-28 04:01:38,170 INFO L125 PetriNetUnfolderBase]: For 253988/253994 co-relation queries the response was YES. [2024-06-28 04:01:38,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46171 conditions, 9059 events. 5742/9059 cut-off events. For 253988/253994 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 57445 event pairs, 2799 based on Foata normal form. 10/9069 useless extension candidates. Maximal degree in co-relation 46094. Up to 8934 conditions per place. [2024-06-28 04:01:38,246 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 157 selfloop transitions, 23 changer transitions 0/183 dead transitions. [2024-06-28 04:01:38,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 183 transitions, 2142 flow [2024-06-28 04:01:38,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:01:38,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:01:38,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-28 04:01:38,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36890243902439024 [2024-06-28 04:01:38,248 INFO L175 Difference]: Start difference. First operand has 156 places, 153 transitions, 1616 flow. Second operand 8 states and 121 transitions. [2024-06-28 04:01:38,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 183 transitions, 2142 flow [2024-06-28 04:01:38,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 183 transitions, 2109 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-28 04:01:38,496 INFO L231 Difference]: Finished difference. Result has 160 places, 156 transitions, 1669 flow [2024-06-28 04:01:38,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1583, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1669, PETRI_PLACES=160, PETRI_TRANSITIONS=156} [2024-06-28 04:01:38,497 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 118 predicate places. [2024-06-28 04:01:38,497 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 156 transitions, 1669 flow [2024-06-28 04:01:38,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 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) [2024-06-28 04:01:38,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:01:38,497 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:01:38,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-28 04:01:38,498 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)] === [2024-06-28 04:01:38,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:01:38,498 INFO L85 PathProgramCache]: Analyzing trace with hash -1309383831, now seen corresponding path program 2 times [2024-06-28 04:01:38,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:01:38,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939867099] [2024-06-28 04:01:38,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:01:38,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:01:38,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:01:39,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:01:39,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:01:39,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939867099] [2024-06-28 04:01:39,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939867099] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:01:39,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:01:39,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:01:39,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360831842] [2024-06-28 04:01:39,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:01:39,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:01:39,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:01:39,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:01:39,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:01:39,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-28 04:01:39,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 156 transitions, 1669 flow. Second operand has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 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) [2024-06-28 04:01:39,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:01:39,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-28 04:01:39,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:01:41,966 INFO L124 PetriNetUnfolderBase]: 5730/9045 cut-off events. [2024-06-28 04:01:41,967 INFO L125 PetriNetUnfolderBase]: For 265340/265346 co-relation queries the response was YES. [2024-06-28 04:01:42,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46410 conditions, 9045 events. 5730/9045 cut-off events. For 265340/265346 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 57317 event pairs, 2813 based on Foata normal form. 7/9052 useless extension candidates. Maximal degree in co-relation 46332. Up to 8926 conditions per place. [2024-06-28 04:01:42,035 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 148 selfloop transitions, 21 changer transitions 0/172 dead transitions. [2024-06-28 04:01:42,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 172 transitions, 2045 flow [2024-06-28 04:01:42,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:01:42,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:01:42,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 93 transitions. [2024-06-28 04:01:42,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3780487804878049 [2024-06-28 04:01:42,036 INFO L175 Difference]: Start difference. First operand has 160 places, 156 transitions, 1669 flow. Second operand 6 states and 93 transitions. [2024-06-28 04:01:42,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 172 transitions, 2045 flow [2024-06-28 04:01:42,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 172 transitions, 1951 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-28 04:01:42,300 INFO L231 Difference]: Finished difference. Result has 160 places, 156 transitions, 1623 flow [2024-06-28 04:01:42,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1575, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1623, PETRI_PLACES=160, PETRI_TRANSITIONS=156} [2024-06-28 04:01:42,301 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 118 predicate places. [2024-06-28 04:01:42,301 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 156 transitions, 1623 flow [2024-06-28 04:01:42,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 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) [2024-06-28 04:01:42,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:01:42,301 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:01:42,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-28 04:01:42,302 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)] === [2024-06-28 04:01:42,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:01:42,302 INFO L85 PathProgramCache]: Analyzing trace with hash 869741707, now seen corresponding path program 3 times [2024-06-28 04:01:42,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:01:42,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062603544] [2024-06-28 04:01:42,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:01:42,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:01:42,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:01:44,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:01:44,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:01:44,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062603544] [2024-06-28 04:01:44,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062603544] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:01:44,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:01:44,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:01:44,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408761607] [2024-06-28 04:01:44,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:01:44,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:01:44,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:01:44,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:01:44,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:01:44,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-28 04:01:44,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 156 transitions, 1623 flow. Second operand has 9 states, 9 states have (on average 7.777777777777778) internal successors, (70), 9 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:01:44,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:01:44,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-28 04:01:44,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:01:46,510 INFO L124 PetriNetUnfolderBase]: 5718/9029 cut-off events. [2024-06-28 04:01:46,511 INFO L125 PetriNetUnfolderBase]: For 276745/276751 co-relation queries the response was YES. [2024-06-28 04:01:46,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46239 conditions, 9029 events. 5718/9029 cut-off events. For 276745/276751 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 57268 event pairs, 2805 based on Foata normal form. 7/9036 useless extension candidates. Maximal degree in co-relation 46161. Up to 8886 conditions per place. [2024-06-28 04:01:46,584 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 148 selfloop transitions, 26 changer transitions 0/177 dead transitions. [2024-06-28 04:01:46,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 177 transitions, 2049 flow [2024-06-28 04:01:46,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:01:46,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:01:46,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 104 transitions. [2024-06-28 04:01:46,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3623693379790941 [2024-06-28 04:01:46,586 INFO L175 Difference]: Start difference. First operand has 160 places, 156 transitions, 1623 flow. Second operand 7 states and 104 transitions. [2024-06-28 04:01:46,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 177 transitions, 2049 flow [2024-06-28 04:01:46,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 177 transitions, 2007 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-28 04:01:46,887 INFO L231 Difference]: Finished difference. Result has 162 places, 159 transitions, 1681 flow [2024-06-28 04:01:46,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1581, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1681, PETRI_PLACES=162, PETRI_TRANSITIONS=159} [2024-06-28 04:01:46,888 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 120 predicate places. [2024-06-28 04:01:46,888 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 159 transitions, 1681 flow [2024-06-28 04:01:46,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.777777777777778) internal successors, (70), 9 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:01:46,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:01:46,888 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:01:46,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-28 04:01:46,888 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)] === [2024-06-28 04:01:46,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:01:46,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1941901419, now seen corresponding path program 1 times [2024-06-28 04:01:46,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:01:46,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103502945] [2024-06-28 04:01:46,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:01:46,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:01:46,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:01:48,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:01:48,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:01:48,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103502945] [2024-06-28 04:01:48,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103502945] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:01:48,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:01:48,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:01:48,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542644431] [2024-06-28 04:01:48,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:01:48,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:01:48,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:01:48,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:01:48,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:01:48,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-28 04:01:48,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 159 transitions, 1681 flow. Second operand has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 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) [2024-06-28 04:01:48,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:01:48,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-28 04:01:48,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:01:50,993 INFO L124 PetriNetUnfolderBase]: 5716/9025 cut-off events. [2024-06-28 04:01:50,994 INFO L125 PetriNetUnfolderBase]: For 290110/290116 co-relation queries the response was YES. [2024-06-28 04:01:51,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47436 conditions, 9025 events. 5716/9025 cut-off events. For 290110/290116 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 57040 event pairs, 2689 based on Foata normal form. 12/9037 useless extension candidates. Maximal degree in co-relation 47357. Up to 8817 conditions per place. [2024-06-28 04:01:51,063 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 148 selfloop transitions, 36 changer transitions 1/188 dead transitions. [2024-06-28 04:01:51,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 188 transitions, 2230 flow [2024-06-28 04:01:51,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:01:51,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:01:51,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-28 04:01:51,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38414634146341464 [2024-06-28 04:01:51,065 INFO L175 Difference]: Start difference. First operand has 162 places, 159 transitions, 1681 flow. Second operand 8 states and 126 transitions. [2024-06-28 04:01:51,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 188 transitions, 2230 flow [2024-06-28 04:01:51,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 188 transitions, 2152 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-28 04:01:51,405 INFO L231 Difference]: Finished difference. Result has 165 places, 161 transitions, 1721 flow [2024-06-28 04:01:51,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1603, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1721, PETRI_PLACES=165, PETRI_TRANSITIONS=161} [2024-06-28 04:01:51,421 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 123 predicate places. [2024-06-28 04:01:51,421 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 161 transitions, 1721 flow [2024-06-28 04:01:51,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 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) [2024-06-28 04:01:51,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:01:51,422 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:01:51,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-28 04:01:51,422 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)] === [2024-06-28 04:01:51,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:01:51,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1936187499, now seen corresponding path program 2 times [2024-06-28 04:01:51,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:01:51,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123397515] [2024-06-28 04:01:51,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:01:51,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:01:51,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:01:53,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:01:53,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:01:53,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123397515] [2024-06-28 04:01:53,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123397515] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:01:53,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:01:53,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:01:53,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129357563] [2024-06-28 04:01:53,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:01:53,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:01:53,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:01:53,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:01:53,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:01:53,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-28 04:01:53,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 161 transitions, 1721 flow. Second operand has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 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) [2024-06-28 04:01:53,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:01:53,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-28 04:01:53,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:01:55,467 INFO L124 PetriNetUnfolderBase]: 5550/8731 cut-off events. [2024-06-28 04:01:55,467 INFO L125 PetriNetUnfolderBase]: For 299903/299920 co-relation queries the response was YES. [2024-06-28 04:01:55,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46611 conditions, 8731 events. 5550/8731 cut-off events. For 299903/299920 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 54645 event pairs, 2538 based on Foata normal form. 18/8749 useless extension candidates. Maximal degree in co-relation 46531. Up to 8534 conditions per place. [2024-06-28 04:01:55,539 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 141 selfloop transitions, 33 changer transitions 4/181 dead transitions. [2024-06-28 04:01:55,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 181 transitions, 2123 flow [2024-06-28 04:01:55,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:01:55,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:01:55,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-28 04:01:55,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3832752613240418 [2024-06-28 04:01:55,541 INFO L175 Difference]: Start difference. First operand has 165 places, 161 transitions, 1721 flow. Second operand 7 states and 110 transitions. [2024-06-28 04:01:55,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 181 transitions, 2123 flow [2024-06-28 04:01:55,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 181 transitions, 2059 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-28 04:01:55,843 INFO L231 Difference]: Finished difference. Result has 166 places, 158 transitions, 1688 flow [2024-06-28 04:01:55,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1657, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1688, PETRI_PLACES=166, PETRI_TRANSITIONS=158} [2024-06-28 04:01:55,843 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 124 predicate places. [2024-06-28 04:01:55,843 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 158 transitions, 1688 flow [2024-06-28 04:01:55,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 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) [2024-06-28 04:01:55,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:01:55,844 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:01:55,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-28 04:01:55,844 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)] === [2024-06-28 04:01:55,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:01:55,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1049599403, now seen corresponding path program 1 times [2024-06-28 04:01:55,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:01:55,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229615794] [2024-06-28 04:01:55,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:01:55,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:01:55,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:01:58,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:01:58,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:01:58,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229615794] [2024-06-28 04:01:58,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229615794] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:01:58,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:01:58,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:01:58,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688778916] [2024-06-28 04:01:58,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:01:58,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:01:58,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:01:58,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:01:58,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:01:58,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-28 04:01:58,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 158 transitions, 1688 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-28 04:01:58,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:01:58,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-28 04:01:58,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:02:00,070 INFO L124 PetriNetUnfolderBase]: 5114/8041 cut-off events. [2024-06-28 04:02:00,071 INFO L125 PetriNetUnfolderBase]: For 298943/298949 co-relation queries the response was YES. [2024-06-28 04:02:00,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44203 conditions, 8041 events. 5114/8041 cut-off events. For 298943/298949 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 49502 event pairs, 2573 based on Foata normal form. 8/8049 useless extension candidates. Maximal degree in co-relation 44123. Up to 7982 conditions per place. [2024-06-28 04:02:00,126 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 151 selfloop transitions, 18 changer transitions 0/172 dead transitions. [2024-06-28 04:02:00,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 172 transitions, 2086 flow [2024-06-28 04:02:00,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:02:00,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:02:00,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 88 transitions. [2024-06-28 04:02:00,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35772357723577236 [2024-06-28 04:02:00,130 INFO L175 Difference]: Start difference. First operand has 166 places, 158 transitions, 1688 flow. Second operand 6 states and 88 transitions. [2024-06-28 04:02:00,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 172 transitions, 2086 flow [2024-06-28 04:02:00,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 172 transitions, 1989 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-28 04:02:00,374 INFO L231 Difference]: Finished difference. Result has 164 places, 160 transitions, 1671 flow [2024-06-28 04:02:00,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1591, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1671, PETRI_PLACES=164, PETRI_TRANSITIONS=160} [2024-06-28 04:02:00,375 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 122 predicate places. [2024-06-28 04:02:00,375 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 160 transitions, 1671 flow [2024-06-28 04:02:00,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-28 04:02:00,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:02:00,375 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:02:00,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-28 04:02:00,376 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)] === [2024-06-28 04:02:00,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:02:00,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1598210317, now seen corresponding path program 3 times [2024-06-28 04:02:00,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:02:00,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905034338] [2024-06-28 04:02:00,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:02:00,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:02:00,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:02:02,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:02:02,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:02:02,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905034338] [2024-06-28 04:02:02,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905034338] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:02:02,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:02:02,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:02:02,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095537739] [2024-06-28 04:02:02,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:02:02,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:02:02,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:02:02,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:02:02,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:02:02,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-28 04:02:02,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 160 transitions, 1671 flow. Second operand has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 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) [2024-06-28 04:02:02,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:02:02,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-28 04:02:02,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:02:04,456 INFO L124 PetriNetUnfolderBase]: 5144/8083 cut-off events. [2024-06-28 04:02:04,457 INFO L125 PetriNetUnfolderBase]: For 300483/300489 co-relation queries the response was YES. [2024-06-28 04:02:04,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44417 conditions, 8083 events. 5144/8083 cut-off events. For 300483/300489 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 49576 event pairs, 2352 based on Foata normal form. 12/8095 useless extension candidates. Maximal degree in co-relation 44337. Up to 7771 conditions per place. [2024-06-28 04:02:04,525 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 141 selfloop transitions, 46 changer transitions 0/190 dead transitions. [2024-06-28 04:02:04,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 190 transitions, 2325 flow [2024-06-28 04:02:04,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:02:04,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:02:04,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-28 04:02:04,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.397212543554007 [2024-06-28 04:02:04,528 INFO L175 Difference]: Start difference. First operand has 164 places, 160 transitions, 1671 flow. Second operand 7 states and 114 transitions. [2024-06-28 04:02:04,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 190 transitions, 2325 flow [2024-06-28 04:02:04,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 190 transitions, 2269 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-28 04:02:04,828 INFO L231 Difference]: Finished difference. Result has 167 places, 166 transitions, 1790 flow [2024-06-28 04:02:04,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1615, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1790, PETRI_PLACES=167, PETRI_TRANSITIONS=166} [2024-06-28 04:02:04,829 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 125 predicate places. [2024-06-28 04:02:04,829 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 166 transitions, 1790 flow [2024-06-28 04:02:04,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 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) [2024-06-28 04:02:04,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:02:04,830 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:02:04,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-28 04:02:04,830 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)] === [2024-06-28 04:02:04,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:02:04,830 INFO L85 PathProgramCache]: Analyzing trace with hash -524002923, now seen corresponding path program 4 times [2024-06-28 04:02:04,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:02:04,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241744091] [2024-06-28 04:02:04,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:02:04,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:02:04,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:02:07,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:02:07,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:02:07,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241744091] [2024-06-28 04:02:07,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241744091] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:02:07,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:02:07,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:02:07,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498775391] [2024-06-28 04:02:07,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:02:07,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:02:07,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:02:07,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:02:07,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:02:07,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-28 04:02:07,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 166 transitions, 1790 flow. Second operand has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 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) [2024-06-28 04:02:07,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:02:07,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-28 04:02:07,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:02:09,122 INFO L124 PetriNetUnfolderBase]: 5154/8103 cut-off events. [2024-06-28 04:02:09,123 INFO L125 PetriNetUnfolderBase]: For 313285/313304 co-relation queries the response was YES. [2024-06-28 04:02:09,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45075 conditions, 8103 events. 5154/8103 cut-off events. For 313285/313304 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 49814 event pairs, 2398 based on Foata normal form. 17/8120 useless extension candidates. Maximal degree in co-relation 44994. Up to 7777 conditions per place. [2024-06-28 04:02:09,177 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 136 selfloop transitions, 50 changer transitions 0/189 dead transitions. [2024-06-28 04:02:09,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 189 transitions, 2484 flow [2024-06-28 04:02:09,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:02:09,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:02:09,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-28 04:02:09,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3867595818815331 [2024-06-28 04:02:09,179 INFO L175 Difference]: Start difference. First operand has 167 places, 166 transitions, 1790 flow. Second operand 7 states and 111 transitions. [2024-06-28 04:02:09,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 189 transitions, 2484 flow [2024-06-28 04:02:09,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 189 transitions, 2412 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-28 04:02:09,515 INFO L231 Difference]: Finished difference. Result has 171 places, 169 transitions, 1868 flow [2024-06-28 04:02:09,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1720, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1868, PETRI_PLACES=171, PETRI_TRANSITIONS=169} [2024-06-28 04:02:09,515 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 129 predicate places. [2024-06-28 04:02:09,516 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 169 transitions, 1868 flow [2024-06-28 04:02:09,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 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) [2024-06-28 04:02:09,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:02:09,516 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:02:09,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-28 04:02:09,516 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)] === [2024-06-28 04:02:09,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:02:09,517 INFO L85 PathProgramCache]: Analyzing trace with hash -407814413, now seen corresponding path program 5 times [2024-06-28 04:02:09,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:02:09,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975013374] [2024-06-28 04:02:09,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:02:09,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:02:09,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:02:11,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:02:11,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:02:11,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975013374] [2024-06-28 04:02:11,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975013374] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:02:11,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:02:11,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:02:11,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430231136] [2024-06-28 04:02:11,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:02:11,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:02:11,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:02:11,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:02:11,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:02:11,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-28 04:02:11,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 169 transitions, 1868 flow. Second operand has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 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) [2024-06-28 04:02:11,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:02:11,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-28 04:02:11,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:02:13,476 INFO L124 PetriNetUnfolderBase]: 5148/8095 cut-off events. [2024-06-28 04:02:13,477 INFO L125 PetriNetUnfolderBase]: For 327402/327421 co-relation queries the response was YES. [2024-06-28 04:02:13,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45309 conditions, 8095 events. 5148/8095 cut-off events. For 327402/327421 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 49703 event pairs, 2394 based on Foata normal form. 17/8112 useless extension candidates. Maximal degree in co-relation 45227. Up to 7774 conditions per place. [2024-06-28 04:02:13,578 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 136 selfloop transitions, 50 changer transitions 0/189 dead transitions. [2024-06-28 04:02:13,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 189 transitions, 2444 flow [2024-06-28 04:02:13,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:02:13,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:02:13,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-28 04:02:13,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3867595818815331 [2024-06-28 04:02:13,580 INFO L175 Difference]: Start difference. First operand has 171 places, 169 transitions, 1868 flow. Second operand 7 states and 111 transitions. [2024-06-28 04:02:13,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 189 transitions, 2444 flow [2024-06-28 04:02:13,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 189 transitions, 2269 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-28 04:02:13,972 INFO L231 Difference]: Finished difference. Result has 172 places, 169 transitions, 1799 flow [2024-06-28 04:02:13,972 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1693, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1799, PETRI_PLACES=172, PETRI_TRANSITIONS=169} [2024-06-28 04:02:13,973 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 130 predicate places. [2024-06-28 04:02:13,973 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 169 transitions, 1799 flow [2024-06-28 04:02:13,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 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) [2024-06-28 04:02:13,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:02:13,973 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:02:13,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-28 04:02:13,974 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)] === [2024-06-28 04:02:13,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:02:13,974 INFO L85 PathProgramCache]: Analyzing trace with hash -407431687, now seen corresponding path program 2 times [2024-06-28 04:02:13,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:02:13,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707819108] [2024-06-28 04:02:13,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:02:13,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:02:13,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:02:16,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:02:16,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:02:16,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707819108] [2024-06-28 04:02:16,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707819108] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:02:16,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:02:16,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:02:16,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913433243] [2024-06-28 04:02:16,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:02:16,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:02:16,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:02:16,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:02:16,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:02:16,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-28 04:02:16,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 169 transitions, 1799 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-28 04:02:16,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:02:16,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-28 04:02:16,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:02:18,663 INFO L124 PetriNetUnfolderBase]: 5156/8101 cut-off events. [2024-06-28 04:02:18,664 INFO L125 PetriNetUnfolderBase]: For 341635/341641 co-relation queries the response was YES. [2024-06-28 04:02:18,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45684 conditions, 8101 events. 5156/8101 cut-off events. For 341635/341641 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 49893 event pairs, 2590 based on Foata normal form. 8/8109 useless extension candidates. Maximal degree in co-relation 45601. Up to 8040 conditions per place. [2024-06-28 04:02:18,720 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 163 selfloop transitions, 19 changer transitions 0/185 dead transitions. [2024-06-28 04:02:18,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 185 transitions, 2231 flow [2024-06-28 04:02:18,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:02:18,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:02:18,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 98 transitions. [2024-06-28 04:02:18,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34146341463414637 [2024-06-28 04:02:18,722 INFO L175 Difference]: Start difference. First operand has 172 places, 169 transitions, 1799 flow. Second operand 7 states and 98 transitions. [2024-06-28 04:02:18,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 185 transitions, 2231 flow [2024-06-28 04:02:19,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 185 transitions, 2099 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-28 04:02:19,061 INFO L231 Difference]: Finished difference. Result has 172 places, 171 transitions, 1750 flow [2024-06-28 04:02:19,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1667, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1750, PETRI_PLACES=172, PETRI_TRANSITIONS=171} [2024-06-28 04:02:19,061 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 130 predicate places. [2024-06-28 04:02:19,061 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 171 transitions, 1750 flow [2024-06-28 04:02:19,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-28 04:02:19,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:02:19,062 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:02:19,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-28 04:02:19,062 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)] === [2024-06-28 04:02:19,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:02:19,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1205535155, now seen corresponding path program 3 times [2024-06-28 04:02:19,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:02:19,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40199847] [2024-06-28 04:02:19,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:02:19,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:02:19,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:02:21,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:02:21,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:02:21,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40199847] [2024-06-28 04:02:21,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40199847] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:02:21,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:02:21,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:02:21,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132712354] [2024-06-28 04:02:21,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:02:21,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:02:21,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:02:21,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:02:21,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:02:21,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-28 04:02:21,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 171 transitions, 1750 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-28 04:02:21,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:02:21,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-28 04:02:21,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:02:23,327 INFO L124 PetriNetUnfolderBase]: 5151/8094 cut-off events. [2024-06-28 04:02:23,327 INFO L125 PetriNetUnfolderBase]: For 355542/355548 co-relation queries the response was YES. [2024-06-28 04:02:23,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45760 conditions, 8094 events. 5151/8094 cut-off events. For 355542/355548 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 49899 event pairs, 2569 based on Foata normal form. 8/8102 useless extension candidates. Maximal degree in co-relation 45677. Up to 8013 conditions per place. [2024-06-28 04:02:23,395 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 160 selfloop transitions, 25 changer transitions 0/188 dead transitions. [2024-06-28 04:02:23,396 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 188 transitions, 2199 flow [2024-06-28 04:02:23,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:02:23,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:02:23,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 106 transitions. [2024-06-28 04:02:23,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3231707317073171 [2024-06-28 04:02:23,397 INFO L175 Difference]: Start difference. First operand has 172 places, 171 transitions, 1750 flow. Second operand 8 states and 106 transitions. [2024-06-28 04:02:23,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 188 transitions, 2199 flow [2024-06-28 04:02:23,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 188 transitions, 2132 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-28 04:02:23,758 INFO L231 Difference]: Finished difference. Result has 175 places, 173 transitions, 1782 flow [2024-06-28 04:02:23,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1683, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1782, PETRI_PLACES=175, PETRI_TRANSITIONS=173} [2024-06-28 04:02:23,758 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 133 predicate places. [2024-06-28 04:02:23,758 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 173 transitions, 1782 flow [2024-06-28 04:02:23,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-28 04:02:23,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:02:23,759 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:02:23,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-28 04:02:23,759 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)] === [2024-06-28 04:02:23,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:02:23,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1598196429, now seen corresponding path program 1 times [2024-06-28 04:02:23,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:02:23,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500523939] [2024-06-28 04:02:23,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:02:23,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:02:23,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:02:26,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:02:26,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:02:26,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500523939] [2024-06-28 04:02:26,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500523939] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:02:26,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:02:26,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:02:26,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151929860] [2024-06-28 04:02:26,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:02:26,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:02:26,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:02:26,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:02:26,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:02:26,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-28 04:02:26,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 173 transitions, 1782 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-28 04:02:26,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:02:26,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-28 04:02:26,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:02:28,678 INFO L124 PetriNetUnfolderBase]: 5203/8172 cut-off events. [2024-06-28 04:02:28,679 INFO L125 PetriNetUnfolderBase]: For 383249/383249 co-relation queries the response was YES. [2024-06-28 04:02:28,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46497 conditions, 8172 events. 5203/8172 cut-off events. For 383249/383249 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 50227 event pairs, 2516 based on Foata normal form. 14/8186 useless extension candidates. Maximal degree in co-relation 46413. Up to 8031 conditions per place. [2024-06-28 04:02:28,747 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 180 selfloop transitions, 19 changer transitions 0/202 dead transitions. [2024-06-28 04:02:28,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 202 transitions, 2291 flow [2024-06-28 04:02:28,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:02:28,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:02:28,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-28 04:02:28,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3867595818815331 [2024-06-28 04:02:28,748 INFO L175 Difference]: Start difference. First operand has 175 places, 173 transitions, 1782 flow. Second operand 7 states and 111 transitions. [2024-06-28 04:02:28,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 202 transitions, 2291 flow [2024-06-28 04:02:29,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 202 transitions, 2193 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-28 04:02:29,100 INFO L231 Difference]: Finished difference. Result has 175 places, 175 transitions, 1762 flow [2024-06-28 04:02:29,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1686, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1762, PETRI_PLACES=175, PETRI_TRANSITIONS=175} [2024-06-28 04:02:29,101 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 133 predicate places. [2024-06-28 04:02:29,101 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 175 transitions, 1762 flow [2024-06-28 04:02:29,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-28 04:02:29,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:02:29,102 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:02:29,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-28 04:02:29,102 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)] === [2024-06-28 04:02:29,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:02:29,102 INFO L85 PathProgramCache]: Analyzing trace with hash 1230144679, now seen corresponding path program 2 times [2024-06-28 04:02:29,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:02:29,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721192722] [2024-06-28 04:02:29,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:02:29,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:02:29,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:02:31,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:02:31,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:02:31,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721192722] [2024-06-28 04:02:31,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721192722] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:02:31,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:02:31,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:02:31,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306015565] [2024-06-28 04:02:31,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:02:31,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:02:31,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:02:31,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:02:31,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:02:31,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-28 04:02:31,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 175 transitions, 1762 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-28 04:02:31,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:02:31,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-28 04:02:31,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:02:33,752 INFO L124 PetriNetUnfolderBase]: 5211/8187 cut-off events. [2024-06-28 04:02:33,752 INFO L125 PetriNetUnfolderBase]: For 388805/388811 co-relation queries the response was YES. [2024-06-28 04:02:33,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47052 conditions, 8187 events. 5211/8187 cut-off events. For 388805/388811 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 50311 event pairs, 2497 based on Foata normal form. 8/8195 useless extension candidates. Maximal degree in co-relation 46968. Up to 8095 conditions per place. [2024-06-28 04:02:33,809 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 172 selfloop transitions, 19 changer transitions 0/194 dead transitions. [2024-06-28 04:02:33,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 194 transitions, 2217 flow [2024-06-28 04:02:33,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:02:33,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:02:33,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 100 transitions. [2024-06-28 04:02:33,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34843205574912894 [2024-06-28 04:02:33,810 INFO L175 Difference]: Start difference. First operand has 175 places, 175 transitions, 1762 flow. Second operand 7 states and 100 transitions. [2024-06-28 04:02:33,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 194 transitions, 2217 flow [2024-06-28 04:02:34,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 194 transitions, 2161 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-28 04:02:34,161 INFO L231 Difference]: Finished difference. Result has 177 places, 177 transitions, 1785 flow [2024-06-28 04:02:34,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1706, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1785, PETRI_PLACES=177, PETRI_TRANSITIONS=177} [2024-06-28 04:02:34,162 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 135 predicate places. [2024-06-28 04:02:34,162 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 177 transitions, 1785 flow [2024-06-28 04:02:34,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-28 04:02:34,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:02:34,162 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:02:34,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-28 04:02:34,162 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)] === [2024-06-28 04:02:34,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:02:34,163 INFO L85 PathProgramCache]: Analyzing trace with hash -394468045, now seen corresponding path program 3 times [2024-06-28 04:02:34,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:02:34,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297743209] [2024-06-28 04:02:34,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:02:34,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:02:34,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:02:37,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:02:37,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:02:37,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297743209] [2024-06-28 04:02:37,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297743209] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:02:37,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:02:37,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:02:37,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291764473] [2024-06-28 04:02:37,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:02:37,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:02:37,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:02:37,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:02:37,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:02:37,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-28 04:02:37,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 177 transitions, 1785 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-28 04:02:37,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:02:37,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-28 04:02:37,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:02:38,782 INFO L124 PetriNetUnfolderBase]: 5206/8180 cut-off events. [2024-06-28 04:02:38,782 INFO L125 PetriNetUnfolderBase]: For 403908/403914 co-relation queries the response was YES. [2024-06-28 04:02:38,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47293 conditions, 8180 events. 5206/8180 cut-off events. For 403908/403914 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 50253 event pairs, 2488 based on Foata normal form. 8/8188 useless extension candidates. Maximal degree in co-relation 47208. Up to 8016 conditions per place. [2024-06-28 04:02:38,854 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 174 selfloop transitions, 24 changer transitions 0/201 dead transitions. [2024-06-28 04:02:38,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 201 transitions, 2286 flow [2024-06-28 04:02:38,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:02:38,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:02:38,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 106 transitions. [2024-06-28 04:02:38,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3693379790940767 [2024-06-28 04:02:38,856 INFO L175 Difference]: Start difference. First operand has 177 places, 177 transitions, 1785 flow. Second operand 7 states and 106 transitions. [2024-06-28 04:02:38,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 201 transitions, 2286 flow [2024-06-28 04:02:39,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 201 transitions, 2223 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-28 04:02:39,273 INFO L231 Difference]: Finished difference. Result has 179 places, 179 transitions, 1815 flow [2024-06-28 04:02:39,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1722, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1815, PETRI_PLACES=179, PETRI_TRANSITIONS=179} [2024-06-28 04:02:39,274 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 137 predicate places. [2024-06-28 04:02:39,274 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 179 transitions, 1815 flow [2024-06-28 04:02:39,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-28 04:02:39,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:02:39,274 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:02:39,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-28 04:02:39,275 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)] === [2024-06-28 04:02:39,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:02:39,275 INFO L85 PathProgramCache]: Analyzing trace with hash -1197289528, now seen corresponding path program 1 times [2024-06-28 04:02:39,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:02:39,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520032096] [2024-06-28 04:02:39,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:02:39,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:02:39,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:02:42,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:02:42,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:02:42,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520032096] [2024-06-28 04:02:42,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520032096] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:02:42,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:02:42,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:02:42,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697408845] [2024-06-28 04:02:42,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:02:42,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:02:42,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:02:42,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:02:42,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:02:42,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-28 04:02:42,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 179 transitions, 1815 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:02:42,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:02:42,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-28 04:02:42,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:02:43,957 INFO L124 PetriNetUnfolderBase]: 5234/8223 cut-off events. [2024-06-28 04:02:43,958 INFO L125 PetriNetUnfolderBase]: For 427964/427970 co-relation queries the response was YES. [2024-06-28 04:02:44,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47943 conditions, 8223 events. 5234/8223 cut-off events. For 427964/427970 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 50411 event pairs, 2246 based on Foata normal form. 14/8237 useless extension candidates. Maximal degree in co-relation 47857. Up to 7948 conditions per place. [2024-06-28 04:02:44,026 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 190 selfloop transitions, 27 changer transitions 0/220 dead transitions. [2024-06-28 04:02:44,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 220 transitions, 2475 flow [2024-06-28 04:02:44,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:02:44,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:02:44,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-28 04:02:44,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3794037940379404 [2024-06-28 04:02:44,028 INFO L175 Difference]: Start difference. First operand has 179 places, 179 transitions, 1815 flow. Second operand 9 states and 140 transitions. [2024-06-28 04:02:44,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 220 transitions, 2475 flow [2024-06-28 04:02:44,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 220 transitions, 2398 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-28 04:02:44,420 INFO L231 Difference]: Finished difference. Result has 183 places, 180 transitions, 1808 flow [2024-06-28 04:02:44,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1738, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1808, PETRI_PLACES=183, PETRI_TRANSITIONS=180} [2024-06-28 04:02:44,421 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 141 predicate places. [2024-06-28 04:02:44,421 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 180 transitions, 1808 flow [2024-06-28 04:02:44,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:02:44,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:02:44,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:02:44,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-28 04:02:44,421 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)] === [2024-06-28 04:02:44,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:02:44,422 INFO L85 PathProgramCache]: Analyzing trace with hash -179567302, now seen corresponding path program 2 times [2024-06-28 04:02:44,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:02:44,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162485690] [2024-06-28 04:02:44,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:02:44,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:02:44,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:02:46,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:02:46,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:02:46,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162485690] [2024-06-28 04:02:46,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162485690] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:02:46,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:02:46,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:02:46,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414219991] [2024-06-28 04:02:46,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:02:46,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:02:46,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:02:46,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:02:46,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:02:46,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-28 04:02:46,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 180 transitions, 1808 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:02:46,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:02:46,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-28 04:02:46,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:02:48,989 INFO L124 PetriNetUnfolderBase]: 5278/8291 cut-off events. [2024-06-28 04:02:48,990 INFO L125 PetriNetUnfolderBase]: For 449998/450004 co-relation queries the response was YES. [2024-06-28 04:02:49,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48634 conditions, 8291 events. 5278/8291 cut-off events. For 449998/450004 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 51063 event pairs, 2402 based on Foata normal form. 18/8309 useless extension candidates. Maximal degree in co-relation 48547. Up to 8122 conditions per place. [2024-06-28 04:02:49,048 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 187 selfloop transitions, 24 changer transitions 0/214 dead transitions. [2024-06-28 04:02:49,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 214 transitions, 2340 flow [2024-06-28 04:02:49,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:02:49,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:02:49,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 134 transitions. [2024-06-28 04:02:49,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36314363143631434 [2024-06-28 04:02:49,050 INFO L175 Difference]: Start difference. First operand has 183 places, 180 transitions, 1808 flow. Second operand 9 states and 134 transitions. [2024-06-28 04:02:49,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 214 transitions, 2340 flow [2024-06-28 04:02:49,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 214 transitions, 2264 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-28 04:02:49,478 INFO L231 Difference]: Finished difference. Result has 185 places, 181 transitions, 1801 flow [2024-06-28 04:02:49,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1734, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1801, PETRI_PLACES=185, PETRI_TRANSITIONS=181} [2024-06-28 04:02:49,479 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 143 predicate places. [2024-06-28 04:02:49,479 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 181 transitions, 1801 flow [2024-06-28 04:02:49,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:02:49,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:02:49,479 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:02:49,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-28 04:02:49,479 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)] === [2024-06-28 04:02:49,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:02:49,480 INFO L85 PathProgramCache]: Analyzing trace with hash -184989946, now seen corresponding path program 1 times [2024-06-28 04:02:49,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:02:49,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076365960] [2024-06-28 04:02:49,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:02:49,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:02:49,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:02:51,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:02:51,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:02:51,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076365960] [2024-06-28 04:02:51,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076365960] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:02:51,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:02:51,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:02:51,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693028487] [2024-06-28 04:02:51,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:02:51,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:02:51,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:02:51,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:02:51,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:02:51,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-28 04:02:51,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 181 transitions, 1801 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-28 04:02:51,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:02:51,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-28 04:02:51,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:02:54,323 INFO L124 PetriNetUnfolderBase]: 5274/8289 cut-off events. [2024-06-28 04:02:54,323 INFO L125 PetriNetUnfolderBase]: For 458380/458397 co-relation queries the response was YES. [2024-06-28 04:02:54,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48327 conditions, 8289 events. 5274/8289 cut-off events. For 458380/458397 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 50748 event pairs, 1957 based on Foata normal form. 28/8317 useless extension candidates. Maximal degree in co-relation 48239. Up to 7500 conditions per place. [2024-06-28 04:02:54,395 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 172 selfloop transitions, 61 changer transitions 1/237 dead transitions. [2024-06-28 04:02:54,396 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 237 transitions, 2611 flow [2024-06-28 04:02:54,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:02:54,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:02:54,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-28 04:02:54,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-28 04:02:54,397 INFO L175 Difference]: Start difference. First operand has 185 places, 181 transitions, 1801 flow. Second operand 10 states and 175 transitions. [2024-06-28 04:02:54,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 237 transitions, 2611 flow [2024-06-28 04:02:54,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 237 transitions, 2562 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-28 04:02:54,800 INFO L231 Difference]: Finished difference. Result has 188 places, 183 transitions, 1901 flow [2024-06-28 04:02:54,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1752, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1901, PETRI_PLACES=188, PETRI_TRANSITIONS=183} [2024-06-28 04:02:54,801 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 146 predicate places. [2024-06-28 04:02:54,801 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 183 transitions, 1901 flow [2024-06-28 04:02:54,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-28 04:02:54,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:02:54,801 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:02:54,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-28 04:02:54,802 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)] === [2024-06-28 04:02:54,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:02:54,802 INFO L85 PathProgramCache]: Analyzing trace with hash -179276026, now seen corresponding path program 2 times [2024-06-28 04:02:54,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:02:54,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738429209] [2024-06-28 04:02:54,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:02:54,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:02:54,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:02:57,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:02:57,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:02:57,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738429209] [2024-06-28 04:02:57,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738429209] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:02:57,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:02:57,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:02:57,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357378943] [2024-06-28 04:02:57,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:02:57,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:02:57,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:02:57,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:02:57,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:02:57,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-28 04:02:57,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 183 transitions, 1901 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-28 04:02:57,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:02:57,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-28 04:02:57,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:02:59,638 INFO L124 PetriNetUnfolderBase]: 5382/8441 cut-off events. [2024-06-28 04:02:59,639 INFO L125 PetriNetUnfolderBase]: For 483884/483901 co-relation queries the response was YES. [2024-06-28 04:02:59,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50436 conditions, 8441 events. 5382/8441 cut-off events. For 483884/483901 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 51653 event pairs, 1952 based on Foata normal form. 20/8461 useless extension candidates. Maximal degree in co-relation 50347. Up to 7556 conditions per place. [2024-06-28 04:02:59,708 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 161 selfloop transitions, 67 changer transitions 1/232 dead transitions. [2024-06-28 04:02:59,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 232 transitions, 2747 flow [2024-06-28 04:02:59,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:02:59,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:02:59,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-28 04:02:59,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4173441734417344 [2024-06-28 04:02:59,710 INFO L175 Difference]: Start difference. First operand has 188 places, 183 transitions, 1901 flow. Second operand 9 states and 154 transitions. [2024-06-28 04:02:59,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 232 transitions, 2747 flow [2024-06-28 04:03:00,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 232 transitions, 2629 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-28 04:03:00,217 INFO L231 Difference]: Finished difference. Result has 191 places, 189 transitions, 2026 flow [2024-06-28 04:03:00,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1791, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2026, PETRI_PLACES=191, PETRI_TRANSITIONS=189} [2024-06-28 04:03:00,217 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 149 predicate places. [2024-06-28 04:03:00,218 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 189 transitions, 2026 flow [2024-06-28 04:03:00,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-28 04:03:00,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:03:00,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:03:00,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-28 04:03:00,218 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)] === [2024-06-28 04:03:00,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:03:00,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1857624326, now seen corresponding path program 3 times [2024-06-28 04:03:00,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:03:00,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108355504] [2024-06-28 04:03:00,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:03:00,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:03:00,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:03:02,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:03:02,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:03:02,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108355504] [2024-06-28 04:03:02,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108355504] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:03:02,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:03:02,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:03:02,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729576401] [2024-06-28 04:03:02,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:03:02,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:03:02,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:03:02,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:03:02,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:03:02,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-28 04:03:02,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 189 transitions, 2026 flow. Second operand has 10 states, 10 states have (on average 7.7) internal successors, (77), 10 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:03:02,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:03:02,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-28 04:03:02,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:03:05,613 INFO L124 PetriNetUnfolderBase]: 6445/9965 cut-off events. [2024-06-28 04:03:05,613 INFO L125 PetriNetUnfolderBase]: For 585770/585770 co-relation queries the response was YES. [2024-06-28 04:03:05,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62033 conditions, 9965 events. 6445/9965 cut-off events. For 585770/585770 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 61392 event pairs, 2819 based on Foata normal form. 12/9977 useless extension candidates. Maximal degree in co-relation 61942. Up to 8897 conditions per place. [2024-06-28 04:03:05,710 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 261 selfloop transitions, 77 changer transitions 1/342 dead transitions. [2024-06-28 04:03:05,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 342 transitions, 4360 flow [2024-06-28 04:03:05,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-06-28 04:03:05,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-06-28 04:03:05,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 247 transitions. [2024-06-28 04:03:05,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37652439024390244 [2024-06-28 04:03:05,712 INFO L175 Difference]: Start difference. First operand has 191 places, 189 transitions, 2026 flow. Second operand 16 states and 247 transitions. [2024-06-28 04:03:05,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 342 transitions, 4360 flow [2024-06-28 04:03:06,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 342 transitions, 4171 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-28 04:03:06,474 INFO L231 Difference]: Finished difference. Result has 207 places, 259 transitions, 3094 flow [2024-06-28 04:03:06,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1930, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=3094, PETRI_PLACES=207, PETRI_TRANSITIONS=259} [2024-06-28 04:03:06,474 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 165 predicate places. [2024-06-28 04:03:06,475 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 259 transitions, 3094 flow [2024-06-28 04:03:06,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.7) internal successors, (77), 10 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:03:06,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:03:06,475 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:03:06,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-28 04:03:06,475 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)] === [2024-06-28 04:03:06,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:03:06,475 INFO L85 PathProgramCache]: Analyzing trace with hash -901831318, now seen corresponding path program 3 times [2024-06-28 04:03:06,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:03:06,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868616137] [2024-06-28 04:03:06,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:03:06,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:03:06,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:03:09,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:03:09,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:03:09,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868616137] [2024-06-28 04:03:09,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868616137] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:03:09,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:03:09,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 04:03:09,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090065172] [2024-06-28 04:03:09,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:03:09,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 04:03:09,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:03:09,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 04:03:09,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-28 04:03:09,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-28 04:03:09,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 259 transitions, 3094 flow. Second operand has 11 states, 11 states have (on average 7.636363636363637) internal successors, (84), 11 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) [2024-06-28 04:03:09,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:03:09,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-28 04:03:09,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:03:11,730 INFO L124 PetriNetUnfolderBase]: 6409/9921 cut-off events. [2024-06-28 04:03:11,730 INFO L125 PetriNetUnfolderBase]: For 596685/596691 co-relation queries the response was YES. [2024-06-28 04:03:11,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62609 conditions, 9921 events. 6409/9921 cut-off events. For 596685/596691 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 60993 event pairs, 2900 based on Foata normal form. 15/9936 useless extension candidates. Maximal degree in co-relation 62512. Up to 9710 conditions per place. [2024-06-28 04:03:11,832 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 250 selfloop transitions, 29 changer transitions 0/282 dead transitions. [2024-06-28 04:03:11,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 282 transitions, 3732 flow [2024-06-28 04:03:11,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:03:11,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:03:11,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 107 transitions. [2024-06-28 04:03:11,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37282229965156793 [2024-06-28 04:03:11,834 INFO L175 Difference]: Start difference. First operand has 207 places, 259 transitions, 3094 flow. Second operand 7 states and 107 transitions. [2024-06-28 04:03:11,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 282 transitions, 3732 flow [2024-06-28 04:03:12,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 282 transitions, 3682 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-28 04:03:12,806 INFO L231 Difference]: Finished difference. Result has 211 places, 259 transitions, 3107 flow [2024-06-28 04:03:12,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3044, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3107, PETRI_PLACES=211, PETRI_TRANSITIONS=259} [2024-06-28 04:03:12,807 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 169 predicate places. [2024-06-28 04:03:12,807 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 259 transitions, 3107 flow [2024-06-28 04:03:12,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.636363636363637) internal successors, (84), 11 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) [2024-06-28 04:03:12,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:03:12,807 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] [2024-06-28 04:03:12,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-28 04:03:12,812 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)] === [2024-06-28 04:03:12,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:03:12,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1417812866, now seen corresponding path program 4 times [2024-06-28 04:03:12,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:03:12,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722841226] [2024-06-28 04:03:12,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:03:12,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:03:12,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:03:15,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:03:15,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:03:15,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722841226] [2024-06-28 04:03:15,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722841226] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:03:15,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:03:15,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:03:15,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678858977] [2024-06-28 04:03:15,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:03:15,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:03:15,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:03:15,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:03:15,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:03:15,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-28 04:03:15,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 259 transitions, 3107 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-28 04:03:15,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:03:15,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-28 04:03:15,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:03:18,033 INFO L124 PetriNetUnfolderBase]: 7196/11057 cut-off events. [2024-06-28 04:03:18,033 INFO L125 PetriNetUnfolderBase]: For 678323/678334 co-relation queries the response was YES. [2024-06-28 04:03:18,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71004 conditions, 11057 events. 7196/11057 cut-off events. For 678323/678334 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 68459 event pairs, 3541 based on Foata normal form. 31/11088 useless extension candidates. Maximal degree in co-relation 70906. Up to 10122 conditions per place. [2024-06-28 04:03:18,148 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 272 selfloop transitions, 87 changer transitions 1/363 dead transitions. [2024-06-28 04:03:18,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 363 transitions, 4956 flow [2024-06-28 04:03:18,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 04:03:18,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 04:03:18,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 174 transitions. [2024-06-28 04:03:18,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3858093126385809 [2024-06-28 04:03:18,150 INFO L175 Difference]: Start difference. First operand has 211 places, 259 transitions, 3107 flow. Second operand 11 states and 174 transitions. [2024-06-28 04:03:18,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 363 transitions, 4956 flow [2024-06-28 04:03:19,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 363 transitions, 4878 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-28 04:03:19,367 INFO L231 Difference]: Finished difference. Result has 221 places, 311 transitions, 4213 flow [2024-06-28 04:03:19,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3039, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4213, PETRI_PLACES=221, PETRI_TRANSITIONS=311} [2024-06-28 04:03:19,367 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 179 predicate places. [2024-06-28 04:03:19,367 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 311 transitions, 4213 flow [2024-06-28 04:03:19,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-28 04:03:19,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:03:19,368 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:03:19,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-28 04:03:19,368 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)] === [2024-06-28 04:03:19,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:03:19,368 INFO L85 PathProgramCache]: Analyzing trace with hash -130571032, now seen corresponding path program 5 times [2024-06-28 04:03:19,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:03:19,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8706961] [2024-06-28 04:03:19,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:03:19,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:03:19,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:03:21,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:03:21,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:03:21,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8706961] [2024-06-28 04:03:21,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8706961] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:03:21,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:03:21,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:03:21,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661125941] [2024-06-28 04:03:21,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:03:21,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:03:21,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:03:21,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:03:21,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:03:21,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-28 04:03:21,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 311 transitions, 4213 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-28 04:03:21,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:03:21,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-28 04:03:21,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:03:24,763 INFO L124 PetriNetUnfolderBase]: 7198/11078 cut-off events. [2024-06-28 04:03:24,763 INFO L125 PetriNetUnfolderBase]: For 674794/674798 co-relation queries the response was YES. [2024-06-28 04:03:24,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72207 conditions, 11078 events. 7198/11078 cut-off events. For 674794/674798 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 68918 event pairs, 3320 based on Foata normal form. 28/11106 useless extension candidates. Maximal degree in co-relation 72103. Up to 9508 conditions per place. [2024-06-28 04:03:24,870 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 244 selfloop transitions, 145 changer transitions 2/394 dead transitions. [2024-06-28 04:03:24,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 394 transitions, 5718 flow [2024-06-28 04:03:24,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 04:03:24,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 04:03:24,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 200 transitions. [2024-06-28 04:03:24,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4065040650406504 [2024-06-28 04:03:24,871 INFO L175 Difference]: Start difference. First operand has 221 places, 311 transitions, 4213 flow. Second operand 12 states and 200 transitions. [2024-06-28 04:03:24,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 394 transitions, 5718 flow [2024-06-28 04:03:26,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 394 transitions, 5555 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-28 04:03:26,096 INFO L231 Difference]: Finished difference. Result has 230 places, 334 transitions, 4856 flow [2024-06-28 04:03:26,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4085, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4856, PETRI_PLACES=230, PETRI_TRANSITIONS=334} [2024-06-28 04:03:26,097 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 188 predicate places. [2024-06-28 04:03:26,097 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 334 transitions, 4856 flow [2024-06-28 04:03:26,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-28 04:03:26,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:03:26,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:03:26,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-28 04:03:26,098 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)] === [2024-06-28 04:03:26,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:03:26,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1689890416, now seen corresponding path program 6 times [2024-06-28 04:03:26,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:03:26,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091794062] [2024-06-28 04:03:26,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:03:26,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:03:26,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:03:28,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:03:28,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:03:28,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091794062] [2024-06-28 04:03:28,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091794062] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:03:28,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:03:28,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:03:28,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306484165] [2024-06-28 04:03:28,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:03:28,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:03:28,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:03:28,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:03:28,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:03:28,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-28 04:03:28,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 334 transitions, 4856 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-28 04:03:28,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:03:28,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-28 04:03:28,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:03:31,702 INFO L124 PetriNetUnfolderBase]: 7042/10879 cut-off events. [2024-06-28 04:03:31,702 INFO L125 PetriNetUnfolderBase]: For 685257/685257 co-relation queries the response was YES. [2024-06-28 04:03:31,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70251 conditions, 10879 events. 7042/10879 cut-off events. For 685257/685257 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 67278 event pairs, 2843 based on Foata normal form. 60/10939 useless extension candidates. Maximal degree in co-relation 70146. Up to 8602 conditions per place. [2024-06-28 04:03:31,807 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 188 selfloop transitions, 190 changer transitions 2/383 dead transitions. [2024-06-28 04:03:31,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 383 transitions, 6103 flow [2024-06-28 04:03:31,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 04:03:31,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 04:03:31,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 172 transitions. [2024-06-28 04:03:31,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38137472283813745 [2024-06-28 04:03:31,812 INFO L175 Difference]: Start difference. First operand has 230 places, 334 transitions, 4856 flow. Second operand 11 states and 172 transitions. [2024-06-28 04:03:31,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 383 transitions, 6103 flow [2024-06-28 04:03:32,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 383 transitions, 5895 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-28 04:03:32,865 INFO L231 Difference]: Finished difference. Result has 233 places, 339 transitions, 5170 flow [2024-06-28 04:03:32,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4656, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5170, PETRI_PLACES=233, PETRI_TRANSITIONS=339} [2024-06-28 04:03:32,866 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 191 predicate places. [2024-06-28 04:03:32,866 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 339 transitions, 5170 flow [2024-06-28 04:03:32,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-28 04:03:32,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:03:32,867 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:03:32,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-28 04:03:32,867 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)] === [2024-06-28 04:03:32,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:03:32,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1821792488, now seen corresponding path program 7 times [2024-06-28 04:03:32,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:03:32,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630628318] [2024-06-28 04:03:32,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:03:32,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:03:32,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:03:35,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:03:35,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:03:35,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630628318] [2024-06-28 04:03:35,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630628318] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:03:35,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:03:35,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:03:35,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168882058] [2024-06-28 04:03:35,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:03:35,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:03:35,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:03:35,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:03:35,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:03:35,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-28 04:03:35,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 339 transitions, 5170 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-28 04:03:35,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:03:35,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-28 04:03:35,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:03:38,177 INFO L124 PetriNetUnfolderBase]: 6870/10605 cut-off events. [2024-06-28 04:03:38,177 INFO L125 PetriNetUnfolderBase]: For 602809/602850 co-relation queries the response was YES. [2024-06-28 04:03:38,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69391 conditions, 10605 events. 6870/10605 cut-off events. For 602809/602850 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 65200 event pairs, 1856 based on Foata normal form. 27/10632 useless extension candidates. Maximal degree in co-relation 69288. Up to 8108 conditions per place. [2024-06-28 04:03:38,269 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 181 selfloop transitions, 185 changer transitions 2/371 dead transitions. [2024-06-28 04:03:38,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 371 transitions, 6216 flow [2024-06-28 04:03:38,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:03:38,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:03:38,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-28 04:03:38,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40853658536585363 [2024-06-28 04:03:38,271 INFO L175 Difference]: Start difference. First operand has 233 places, 339 transitions, 5170 flow. Second operand 8 states and 134 transitions. [2024-06-28 04:03:38,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 371 transitions, 6216 flow [2024-06-28 04:03:39,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 371 transitions, 5900 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-28 04:03:39,388 INFO L231 Difference]: Finished difference. Result has 233 places, 337 transitions, 5207 flow [2024-06-28 04:03:39,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4854, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5207, PETRI_PLACES=233, PETRI_TRANSITIONS=337} [2024-06-28 04:03:39,388 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 191 predicate places. [2024-06-28 04:03:39,388 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 337 transitions, 5207 flow [2024-06-28 04:03:39,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-28 04:03:39,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:03:39,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:03:39,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-28 04:03:39,389 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)] === [2024-06-28 04:03:39,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:03:39,389 INFO L85 PathProgramCache]: Analyzing trace with hash -2085873018, now seen corresponding path program 8 times [2024-06-28 04:03:39,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:03:39,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398387957] [2024-06-28 04:03:39,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:03:39,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:03:39,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:03:41,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:03:41,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:03:41,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398387957] [2024-06-28 04:03:41,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398387957] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:03:41,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:03:41,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:03:41,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464688341] [2024-06-28 04:03:41,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:03:41,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:03:41,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:03:41,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:03:41,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:03:41,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-28 04:03:41,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 337 transitions, 5207 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-28 04:03:41,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:03:41,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-28 04:03:41,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:03:44,417 INFO L124 PetriNetUnfolderBase]: 6554/10141 cut-off events. [2024-06-28 04:03:44,417 INFO L125 PetriNetUnfolderBase]: For 619234/619269 co-relation queries the response was YES. [2024-06-28 04:03:44,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67208 conditions, 10141 events. 6554/10141 cut-off events. For 619234/619269 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 62253 event pairs, 2780 based on Foata normal form. 40/10181 useless extension candidates. Maximal degree in co-relation 67104. Up to 9574 conditions per place. [2024-06-28 04:03:44,504 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 249 selfloop transitions, 103 changer transitions 4/359 dead transitions. [2024-06-28 04:03:44,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 359 transitions, 5987 flow [2024-06-28 04:03:44,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:03:44,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:03:44,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 119 transitions. [2024-06-28 04:03:44,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3628048780487805 [2024-06-28 04:03:44,528 INFO L175 Difference]: Start difference. First operand has 233 places, 337 transitions, 5207 flow. Second operand 8 states and 119 transitions. [2024-06-28 04:03:44,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 359 transitions, 5987 flow [2024-06-28 04:03:45,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 359 transitions, 5386 flow, removed 9 selfloop flow, removed 10 redundant places. [2024-06-28 04:03:45,735 INFO L231 Difference]: Finished difference. Result has 231 places, 333 transitions, 4753 flow [2024-06-28 04:03:45,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4606, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4753, PETRI_PLACES=231, PETRI_TRANSITIONS=333} [2024-06-28 04:03:45,736 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 189 predicate places. [2024-06-28 04:03:45,736 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 333 transitions, 4753 flow [2024-06-28 04:03:45,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-28 04:03:45,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:03:45,737 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:03:45,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-28 04:03:45,737 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)] === [2024-06-28 04:03:45,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:03:45,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1822158474, now seen corresponding path program 1 times [2024-06-28 04:03:45,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:03:45,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444449013] [2024-06-28 04:03:45,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:03:45,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:03:45,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:03:48,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:03:48,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:03:48,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444449013] [2024-06-28 04:03:48,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444449013] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:03:48,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:03:48,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:03:48,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816049428] [2024-06-28 04:03:48,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:03:48,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:03:48,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:03:48,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:03:48,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:03:48,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-28 04:03:48,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 333 transitions, 4753 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:03:48,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:03:48,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-28 04:03:48,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:03:51,110 INFO L124 PetriNetUnfolderBase]: 6438/9981 cut-off events. [2024-06-28 04:03:51,110 INFO L125 PetriNetUnfolderBase]: For 613445/613451 co-relation queries the response was YES. [2024-06-28 04:03:51,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64912 conditions, 9981 events. 6438/9981 cut-off events. For 613445/613451 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 61146 event pairs, 2677 based on Foata normal form. 14/9995 useless extension candidates. Maximal degree in co-relation 64808. Up to 9644 conditions per place. [2024-06-28 04:03:51,192 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 320 selfloop transitions, 36 changer transitions 0/359 dead transitions. [2024-06-28 04:03:51,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 359 transitions, 5585 flow [2024-06-28 04:03:51,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:03:51,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:03:51,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 109 transitions. [2024-06-28 04:03:51,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3797909407665505 [2024-06-28 04:03:51,194 INFO L175 Difference]: Start difference. First operand has 231 places, 333 transitions, 4753 flow. Second operand 7 states and 109 transitions. [2024-06-28 04:03:51,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 359 transitions, 5585 flow [2024-06-28 04:03:52,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 359 transitions, 5206 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-28 04:03:52,231 INFO L231 Difference]: Finished difference. Result has 229 places, 334 transitions, 4476 flow [2024-06-28 04:03:52,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4374, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4476, PETRI_PLACES=229, PETRI_TRANSITIONS=334} [2024-06-28 04:03:52,232 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 187 predicate places. [2024-06-28 04:03:52,232 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 334 transitions, 4476 flow [2024-06-28 04:03:52,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:03:52,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:03:52,232 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:03:52,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-28 04:03:52,232 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)] === [2024-06-28 04:03:52,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:03:52,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1551144012, now seen corresponding path program 9 times [2024-06-28 04:03:52,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:03:52,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625761261] [2024-06-28 04:03:52,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:03:52,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:03:52,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:03:55,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:03:55,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:03:55,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625761261] [2024-06-28 04:03:55,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625761261] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:03:55,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:03:55,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:03:55,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794043470] [2024-06-28 04:03:55,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:03:55,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:03:55,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:03:55,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:03:55,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:03:55,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-28 04:03:55,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 334 transitions, 4476 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-28 04:03:55,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:03:55,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-28 04:03:55,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:03:57,737 INFO L124 PetriNetUnfolderBase]: 6322/9803 cut-off events. [2024-06-28 04:03:57,737 INFO L125 PetriNetUnfolderBase]: For 611973/611973 co-relation queries the response was YES. [2024-06-28 04:03:57,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63025 conditions, 9803 events. 6322/9803 cut-off events. For 611973/611973 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 60435 event pairs, 3100 based on Foata normal form. 12/9815 useless extension candidates. Maximal degree in co-relation 62920. Up to 9174 conditions per place. [2024-06-28 04:03:57,839 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 307 selfloop transitions, 73 changer transitions 2/385 dead transitions. [2024-06-28 04:03:57,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 385 transitions, 5420 flow [2024-06-28 04:03:57,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 04:03:57,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 04:03:57,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 173 transitions. [2024-06-28 04:03:57,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835920177383592 [2024-06-28 04:03:57,842 INFO L175 Difference]: Start difference. First operand has 229 places, 334 transitions, 4476 flow. Second operand 11 states and 173 transitions. [2024-06-28 04:03:57,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 385 transitions, 5420 flow [2024-06-28 04:03:59,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 385 transitions, 5328 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-28 04:03:59,012 INFO L231 Difference]: Finished difference. Result has 235 places, 333 transitions, 4521 flow [2024-06-28 04:03:59,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4384, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4521, PETRI_PLACES=235, PETRI_TRANSITIONS=333} [2024-06-28 04:03:59,012 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 193 predicate places. [2024-06-28 04:03:59,013 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 333 transitions, 4521 flow [2024-06-28 04:03:59,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-28 04:03:59,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:03:59,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:03:59,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-28 04:03:59,013 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)] === [2024-06-28 04:03:59,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:03:59,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1938873088, now seen corresponding path program 4 times [2024-06-28 04:03:59,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:03:59,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494756197] [2024-06-28 04:03:59,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:03:59,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:03:59,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:04:01,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:04:01,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:04:01,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494756197] [2024-06-28 04:04:01,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494756197] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:04:01,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:04:01,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:04:01,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760769435] [2024-06-28 04:04:01,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:04:01,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:04:01,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:04:01,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:04:01,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:04:01,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-28 04:04:01,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 333 transitions, 4521 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:04:01,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:04:01,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-28 04:04:01,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:04:04,442 INFO L124 PetriNetUnfolderBase]: 6108/9459 cut-off events. [2024-06-28 04:04:04,443 INFO L125 PetriNetUnfolderBase]: For 625530/625536 co-relation queries the response was YES. [2024-06-28 04:04:04,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62142 conditions, 9459 events. 6108/9459 cut-off events. For 625530/625536 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 57376 event pairs, 2499 based on Foata normal form. 18/9477 useless extension candidates. Maximal degree in co-relation 62036. Up to 9198 conditions per place. [2024-06-28 04:04:04,537 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 320 selfloop transitions, 36 changer transitions 0/359 dead transitions. [2024-06-28 04:04:04,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 359 transitions, 5349 flow [2024-06-28 04:04:04,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:04:04,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:04:04,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 118 transitions. [2024-06-28 04:04:04,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3597560975609756 [2024-06-28 04:04:04,538 INFO L175 Difference]: Start difference. First operand has 235 places, 333 transitions, 4521 flow. Second operand 8 states and 118 transitions. [2024-06-28 04:04:04,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 359 transitions, 5349 flow [2024-06-28 04:04:05,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 359 transitions, 5166 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-28 04:04:05,677 INFO L231 Difference]: Finished difference. Result has 237 places, 334 transitions, 4443 flow [2024-06-28 04:04:05,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4338, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4443, PETRI_PLACES=237, PETRI_TRANSITIONS=334} [2024-06-28 04:04:05,677 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 195 predicate places. [2024-06-28 04:04:05,678 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 334 transitions, 4443 flow [2024-06-28 04:04:05,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:04:05,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:04:05,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:04:05,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-28 04:04:05,678 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)] === [2024-06-28 04:04:05,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:04:05,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1790265798, now seen corresponding path program 1 times [2024-06-28 04:04:05,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:04:05,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560784660] [2024-06-28 04:04:05,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:04:05,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:04:05,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:04:08,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:04:08,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:04:08,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560784660] [2024-06-28 04:04:08,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560784660] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:04:08,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:04:08,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:04:08,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214254207] [2024-06-28 04:04:08,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:04:08,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:04:08,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:04:08,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:04:08,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:04:08,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-28 04:04:08,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 334 transitions, 4443 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-28 04:04:08,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:04:08,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-28 04:04:08,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:04:10,806 INFO L124 PetriNetUnfolderBase]: 6096/9461 cut-off events. [2024-06-28 04:04:10,807 INFO L125 PetriNetUnfolderBase]: For 622690/622690 co-relation queries the response was YES. [2024-06-28 04:04:10,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61709 conditions, 9461 events. 6096/9461 cut-off events. For 622690/622690 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 57766 event pairs, 2598 based on Foata normal form. 4/9465 useless extension candidates. Maximal degree in co-relation 61602. Up to 8808 conditions per place. [2024-06-28 04:04:10,924 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 253 selfloop transitions, 110 changer transitions 0/366 dead transitions. [2024-06-28 04:04:10,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 366 transitions, 5387 flow [2024-06-28 04:04:10,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:04:10,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:04:10,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-28 04:04:10,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3794037940379404 [2024-06-28 04:04:10,926 INFO L175 Difference]: Start difference. First operand has 237 places, 334 transitions, 4443 flow. Second operand 9 states and 140 transitions. [2024-06-28 04:04:10,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 366 transitions, 5387 flow [2024-06-28 04:04:12,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 366 transitions, 5294 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-28 04:04:12,258 INFO L231 Difference]: Finished difference. Result has 240 places, 334 transitions, 4576 flow [2024-06-28 04:04:12,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4350, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4576, PETRI_PLACES=240, PETRI_TRANSITIONS=334} [2024-06-28 04:04:12,259 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 198 predicate places. [2024-06-28 04:04:12,259 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 334 transitions, 4576 flow [2024-06-28 04:04:12,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-28 04:04:12,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:04:12,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:04:12,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-28 04:04:12,259 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)] === [2024-06-28 04:04:12,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:04:12,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1995089324, now seen corresponding path program 10 times [2024-06-28 04:04:12,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:04:12,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359327750] [2024-06-28 04:04:12,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:04:12,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:04:12,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:04:14,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:04:14,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:04:14,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359327750] [2024-06-28 04:04:14,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359327750] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:04:14,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:04:14,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:04:14,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693621118] [2024-06-28 04:04:14,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:04:14,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:04:14,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:04:14,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:04:14,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:04:15,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-28 04:04:15,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 334 transitions, 4576 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-28 04:04:15,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:04:15,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-28 04:04:15,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:04:17,559 INFO L124 PetriNetUnfolderBase]: 6156/9541 cut-off events. [2024-06-28 04:04:17,560 INFO L125 PetriNetUnfolderBase]: For 656435/656435 co-relation queries the response was YES. [2024-06-28 04:04:17,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62588 conditions, 9541 events. 6156/9541 cut-off events. For 656435/656435 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 58074 event pairs, 2444 based on Foata normal form. 12/9553 useless extension candidates. Maximal degree in co-relation 62480. Up to 7192 conditions per place. [2024-06-28 04:04:17,658 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 172 selfloop transitions, 205 changer transitions 0/380 dead transitions. [2024-06-28 04:04:17,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 380 transitions, 5858 flow [2024-06-28 04:04:17,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:04:17,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:04:17,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 161 transitions. [2024-06-28 04:04:17,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3926829268292683 [2024-06-28 04:04:17,660 INFO L175 Difference]: Start difference. First operand has 240 places, 334 transitions, 4576 flow. Second operand 10 states and 161 transitions. [2024-06-28 04:04:17,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 380 transitions, 5858 flow [2024-06-28 04:04:18,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 380 transitions, 5594 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-28 04:04:18,888 INFO L231 Difference]: Finished difference. Result has 242 places, 340 transitions, 4785 flow [2024-06-28 04:04:18,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4312, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=199, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4785, PETRI_PLACES=242, PETRI_TRANSITIONS=340} [2024-06-28 04:04:18,889 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 200 predicate places. [2024-06-28 04:04:18,889 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 340 transitions, 4785 flow [2024-06-28 04:04:18,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-28 04:04:18,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:04:18,889 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:04:18,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-28 04:04:18,890 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)] === [2024-06-28 04:04:18,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:04:18,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1905705768, now seen corresponding path program 2 times [2024-06-28 04:04:18,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:04:18,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580752909] [2024-06-28 04:04:18,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:04:18,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:04:18,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:04:21,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:04:21,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:04:21,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580752909] [2024-06-28 04:04:21,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580752909] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:04:21,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:04:21,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:04:21,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646363229] [2024-06-28 04:04:21,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:04:21,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:04:21,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:04:21,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:04:21,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:04:21,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-28 04:04:21,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 340 transitions, 4785 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-28 04:04:21,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:04:21,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-28 04:04:21,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:04:24,274 INFO L124 PetriNetUnfolderBase]: 6176/9569 cut-off events. [2024-06-28 04:04:24,275 INFO L125 PetriNetUnfolderBase]: For 666086/666086 co-relation queries the response was YES. [2024-06-28 04:04:24,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63951 conditions, 9569 events. 6176/9569 cut-off events. For 666086/666086 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 58382 event pairs, 2578 based on Foata normal form. 4/9573 useless extension candidates. Maximal degree in co-relation 63842. Up to 8908 conditions per place. [2024-06-28 04:04:24,357 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 254 selfloop transitions, 111 changer transitions 0/368 dead transitions. [2024-06-28 04:04:24,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 368 transitions, 5747 flow [2024-06-28 04:04:24,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:04:24,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:04:24,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 133 transitions. [2024-06-28 04:04:24,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3604336043360434 [2024-06-28 04:04:24,358 INFO L175 Difference]: Start difference. First operand has 242 places, 340 transitions, 4785 flow. Second operand 9 states and 133 transitions. [2024-06-28 04:04:24,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 368 transitions, 5747 flow [2024-06-28 04:04:25,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 368 transitions, 5460 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-28 04:04:25,538 INFO L231 Difference]: Finished difference. Result has 245 places, 343 transitions, 4764 flow [2024-06-28 04:04:25,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4503, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4764, PETRI_PLACES=245, PETRI_TRANSITIONS=343} [2024-06-28 04:04:25,539 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 203 predicate places. [2024-06-28 04:04:25,539 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 343 transitions, 4764 flow [2024-06-28 04:04:25,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-28 04:04:25,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:04:25,539 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:04:25,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-28 04:04:25,539 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)] === [2024-06-28 04:04:25,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:04:25,540 INFO L85 PathProgramCache]: Analyzing trace with hash -526905654, now seen corresponding path program 11 times [2024-06-28 04:04:25,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:04:25,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25276983] [2024-06-28 04:04:25,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:04:25,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:04:25,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:04:28,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:04:28,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:04:28,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25276983] [2024-06-28 04:04:28,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25276983] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:04:28,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:04:28,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:04:28,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830164091] [2024-06-28 04:04:28,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:04:28,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:04:28,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:04:28,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:04:28,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:04:28,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-28 04:04:28,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 343 transitions, 4764 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-28 04:04:28,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:04:28,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-28 04:04:28,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:04:30,568 INFO L124 PetriNetUnfolderBase]: 6196/9605 cut-off events. [2024-06-28 04:04:30,568 INFO L125 PetriNetUnfolderBase]: For 687083/687114 co-relation queries the response was YES. [2024-06-28 04:04:30,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63828 conditions, 9605 events. 6196/9605 cut-off events. For 687083/687114 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 58649 event pairs, 2635 based on Foata normal form. 19/9624 useless extension candidates. Maximal degree in co-relation 63718. Up to 8848 conditions per place. [2024-06-28 04:04:30,669 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 245 selfloop transitions, 123 changer transitions 0/371 dead transitions. [2024-06-28 04:04:30,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 371 transitions, 5853 flow [2024-06-28 04:04:30,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:04:30,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:04:30,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 134 transitions. [2024-06-28 04:04:30,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36314363143631434 [2024-06-28 04:04:30,671 INFO L175 Difference]: Start difference. First operand has 245 places, 343 transitions, 4764 flow. Second operand 9 states and 134 transitions. [2024-06-28 04:04:30,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 371 transitions, 5853 flow [2024-06-28 04:04:32,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 371 transitions, 5680 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-28 04:04:32,145 INFO L231 Difference]: Finished difference. Result has 248 places, 346 transitions, 4876 flow [2024-06-28 04:04:32,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4591, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4876, PETRI_PLACES=248, PETRI_TRANSITIONS=346} [2024-06-28 04:04:32,146 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 206 predicate places. [2024-06-28 04:04:32,146 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 346 transitions, 4876 flow [2024-06-28 04:04:32,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-28 04:04:32,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:04:32,147 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:04:32,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-28 04:04:32,147 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)] === [2024-06-28 04:04:32,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:04:32,147 INFO L85 PathProgramCache]: Analyzing trace with hash 242536714, now seen corresponding path program 12 times [2024-06-28 04:04:32,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:04:32,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650110531] [2024-06-28 04:04:32,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:04:32,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:04:32,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:04:34,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:04:34,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:04:34,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650110531] [2024-06-28 04:04:34,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650110531] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:04:34,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:04:34,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:04:34,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125799508] [2024-06-28 04:04:34,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:04:34,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:04:34,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:04:34,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:04:34,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:04:34,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-28 04:04:34,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 346 transitions, 4876 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-28 04:04:34,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:04:34,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-28 04:04:34,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:04:37,082 INFO L124 PetriNetUnfolderBase]: 6184/9577 cut-off events. [2024-06-28 04:04:37,082 INFO L125 PetriNetUnfolderBase]: For 700656/700693 co-relation queries the response was YES. [2024-06-28 04:04:37,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63863 conditions, 9577 events. 6184/9577 cut-off events. For 700656/700693 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 58264 event pairs, 2095 based on Foata normal form. 16/9593 useless extension candidates. Maximal degree in co-relation 63752. Up to 6826 conditions per place. [2024-06-28 04:04:37,178 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 177 selfloop transitions, 201 changer transitions 0/381 dead transitions. [2024-06-28 04:04:37,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 381 transitions, 6174 flow [2024-06-28 04:04:37,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:04:37,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:04:37,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-28 04:04:37,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-28 04:04:37,179 INFO L175 Difference]: Start difference. First operand has 248 places, 346 transitions, 4876 flow. Second operand 8 states and 132 transitions. [2024-06-28 04:04:37,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 381 transitions, 6174 flow [2024-06-28 04:04:38,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 381 transitions, 5749 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-28 04:04:38,516 INFO L231 Difference]: Finished difference. Result has 249 places, 352 transitions, 5048 flow [2024-06-28 04:04:38,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4451, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5048, PETRI_PLACES=249, PETRI_TRANSITIONS=352} [2024-06-28 04:04:38,517 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 207 predicate places. [2024-06-28 04:04:38,517 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 352 transitions, 5048 flow [2024-06-28 04:04:38,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-28 04:04:38,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:04:38,517 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:04:38,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-28 04:04:38,518 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)] === [2024-06-28 04:04:38,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:04:38,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1362129912, now seen corresponding path program 3 times [2024-06-28 04:04:38,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:04:38,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294982399] [2024-06-28 04:04:38,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:04:38,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:04:38,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:04:41,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:04:41,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:04:41,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294982399] [2024-06-28 04:04:41,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294982399] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:04:41,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:04:41,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:04:41,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487130776] [2024-06-28 04:04:41,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:04:41,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:04:41,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:04:41,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:04:41,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:04:41,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-28 04:04:41,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 352 transitions, 5048 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-28 04:04:41,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:04:41,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-28 04:04:41,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:04:43,949 INFO L124 PetriNetUnfolderBase]: 6204/9617 cut-off events. [2024-06-28 04:04:43,950 INFO L125 PetriNetUnfolderBase]: For 726105/726136 co-relation queries the response was YES. [2024-06-28 04:04:44,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66351 conditions, 9617 events. 6204/9617 cut-off events. For 726105/726136 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 58716 event pairs, 2631 based on Foata normal form. 19/9636 useless extension candidates. Maximal degree in co-relation 66238. Up to 8936 conditions per place. [2024-06-28 04:04:44,052 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 265 selfloop transitions, 111 changer transitions 0/379 dead transitions. [2024-06-28 04:04:44,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 379 transitions, 6037 flow [2024-06-28 04:04:44,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:04:44,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:04:44,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 132 transitions. [2024-06-28 04:04:44,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35772357723577236 [2024-06-28 04:04:44,054 INFO L175 Difference]: Start difference. First operand has 249 places, 352 transitions, 5048 flow. Second operand 9 states and 132 transitions. [2024-06-28 04:04:44,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 379 transitions, 6037 flow [2024-06-28 04:04:45,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 379 transitions, 5780 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-28 04:04:45,736 INFO L231 Difference]: Finished difference. Result has 254 places, 355 transitions, 5060 flow [2024-06-28 04:04:45,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4791, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5060, PETRI_PLACES=254, PETRI_TRANSITIONS=355} [2024-06-28 04:04:45,736 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 212 predicate places. [2024-06-28 04:04:45,737 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 355 transitions, 5060 flow [2024-06-28 04:04:45,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-28 04:04:45,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:04:45,737 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:04:45,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-28 04:04:45,737 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)] === [2024-06-28 04:04:45,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:04:45,738 INFO L85 PathProgramCache]: Analyzing trace with hash 419788390, now seen corresponding path program 4 times [2024-06-28 04:04:45,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:04:45,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599782359] [2024-06-28 04:04:45,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:04:45,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:04:45,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:04:48,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:04:48,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:04:48,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599782359] [2024-06-28 04:04:48,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599782359] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:04:48,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:04:48,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:04:48,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286301497] [2024-06-28 04:04:48,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:04:48,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:04:48,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:04:48,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:04:48,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:04:48,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-28 04:04:48,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 355 transitions, 5060 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-28 04:04:48,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:04:48,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-28 04:04:48,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:04:51,199 INFO L124 PetriNetUnfolderBase]: 6192/9601 cut-off events. [2024-06-28 04:04:51,199 INFO L125 PetriNetUnfolderBase]: For 737565/737596 co-relation queries the response was YES. [2024-06-28 04:04:51,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66085 conditions, 9601 events. 6192/9601 cut-off events. For 737565/737596 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 58675 event pairs, 2627 based on Foata normal form. 19/9620 useless extension candidates. Maximal degree in co-relation 65970. Up to 8928 conditions per place. [2024-06-28 04:04:51,310 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 256 selfloop transitions, 116 changer transitions 0/375 dead transitions. [2024-06-28 04:04:51,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 375 transitions, 5864 flow [2024-06-28 04:04:51,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:04:51,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:04:51,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 128 transitions. [2024-06-28 04:04:51,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34688346883468835 [2024-06-28 04:04:51,312 INFO L175 Difference]: Start difference. First operand has 254 places, 355 transitions, 5060 flow. Second operand 9 states and 128 transitions. [2024-06-28 04:04:51,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 375 transitions, 5864 flow [2024-06-28 04:04:52,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 375 transitions, 5519 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-28 04:04:52,950 INFO L231 Difference]: Finished difference. Result has 255 places, 355 transitions, 4953 flow [2024-06-28 04:04:52,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4715, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4953, PETRI_PLACES=255, PETRI_TRANSITIONS=355} [2024-06-28 04:04:52,951 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 213 predicate places. [2024-06-28 04:04:52,951 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 355 transitions, 4953 flow [2024-06-28 04:04:52,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-28 04:04:52,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:04:52,951 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:04:52,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-28 04:04:52,952 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)] === [2024-06-28 04:04:52,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:04:52,952 INFO L85 PathProgramCache]: Analyzing trace with hash 242656684, now seen corresponding path program 13 times [2024-06-28 04:04:52,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:04:52,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144433019] [2024-06-28 04:04:52,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:04:52,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:04:52,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:04:55,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:04:55,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:04:55,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144433019] [2024-06-28 04:04:55,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144433019] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:04:55,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:04:55,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:04:55,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091513676] [2024-06-28 04:04:55,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:04:55,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:04:55,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:04:55,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:04:55,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:04:55,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-28 04:04:55,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 355 transitions, 4953 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-28 04:04:55,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:04:55,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-28 04:04:55,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:04:57,838 INFO L124 PetriNetUnfolderBase]: 6180/9585 cut-off events. [2024-06-28 04:04:57,839 INFO L125 PetriNetUnfolderBase]: For 748907/748938 co-relation queries the response was YES. [2024-06-28 04:04:57,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65573 conditions, 9585 events. 6180/9585 cut-off events. For 748907/748938 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 58636 event pairs, 2623 based on Foata normal form. 19/9604 useless extension candidates. Maximal degree in co-relation 65458. Up to 8896 conditions per place. [2024-06-28 04:04:57,927 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 257 selfloop transitions, 116 changer transitions 0/376 dead transitions. [2024-06-28 04:04:57,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 376 transitions, 5761 flow [2024-06-28 04:04:57,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:04:57,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:04:57,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 129 transitions. [2024-06-28 04:04:57,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34959349593495936 [2024-06-28 04:04:57,929 INFO L175 Difference]: Start difference. First operand has 255 places, 355 transitions, 4953 flow. Second operand 9 states and 129 transitions. [2024-06-28 04:04:57,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 376 transitions, 5761 flow [2024-06-28 04:04:59,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 376 transitions, 5457 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-28 04:04:59,414 INFO L231 Difference]: Finished difference. Result has 255 places, 355 transitions, 4887 flow [2024-06-28 04:04:59,415 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4649, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4887, PETRI_PLACES=255, PETRI_TRANSITIONS=355} [2024-06-28 04:04:59,415 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 213 predicate places. [2024-06-28 04:04:59,415 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 355 transitions, 4887 flow [2024-06-28 04:04:59,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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) [2024-06-28 04:04:59,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:04:59,415 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] [2024-06-28 04:04:59,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-28 04:04:59,416 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)] === [2024-06-28 04:04:59,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:04:59,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1296923830, now seen corresponding path program 2 times [2024-06-28 04:04:59,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:04:59,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868752537] [2024-06-28 04:04:59,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:04:59,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:04:59,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:05:02,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:05:02,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:05:02,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868752537] [2024-06-28 04:05:02,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868752537] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:05:02,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:05:02,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:05:02,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422979679] [2024-06-28 04:05:02,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:05:02,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:05:02,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:05:02,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:05:02,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:05:02,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-28 04:05:02,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 355 transitions, 4887 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:05:02,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:05:02,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-28 04:05:02,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:05:04,782 INFO L124 PetriNetUnfolderBase]: 6208/9607 cut-off events. [2024-06-28 04:05:04,782 INFO L125 PetriNetUnfolderBase]: For 777709/777715 co-relation queries the response was YES. [2024-06-28 04:05:04,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66156 conditions, 9607 events. 6208/9607 cut-off events. For 777709/777715 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 58355 event pairs, 2487 based on Foata normal form. 14/9621 useless extension candidates. Maximal degree in co-relation 66040. Up to 9308 conditions per place. [2024-06-28 04:05:04,891 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 343 selfloop transitions, 38 changer transitions 0/384 dead transitions. [2024-06-28 04:05:04,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 384 transitions, 5787 flow [2024-06-28 04:05:04,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:05:04,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:05:04,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-28 04:05:04,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36890243902439024 [2024-06-28 04:05:04,893 INFO L175 Difference]: Start difference. First operand has 255 places, 355 transitions, 4887 flow. Second operand 8 states and 121 transitions. [2024-06-28 04:05:04,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 384 transitions, 5787 flow [2024-06-28 04:05:06,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 384 transitions, 5529 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-28 04:05:06,407 INFO L231 Difference]: Finished difference. Result has 254 places, 356 transitions, 4739 flow [2024-06-28 04:05:06,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4629, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4739, PETRI_PLACES=254, PETRI_TRANSITIONS=356} [2024-06-28 04:05:06,407 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 212 predicate places. [2024-06-28 04:05:06,408 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 356 transitions, 4739 flow [2024-06-28 04:05:06,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:05:06,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:05:06,408 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] [2024-06-28 04:05:06,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-28 04:05:06,408 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)] === [2024-06-28 04:05:06,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:05:06,408 INFO L85 PathProgramCache]: Analyzing trace with hash 656209580, now seen corresponding path program 3 times [2024-06-28 04:05:06,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:05:06,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279044585] [2024-06-28 04:05:06,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:05:06,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:05:06,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:05:09,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:05:09,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:05:09,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279044585] [2024-06-28 04:05:09,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279044585] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:05:09,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:05:09,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:05:09,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268199776] [2024-06-28 04:05:09,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:05:09,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:05:09,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:05:09,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:05:09,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:05:09,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-28 04:05:09,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 356 transitions, 4739 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:05:09,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:05:09,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-28 04:05:09,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:05:11,726 INFO L124 PetriNetUnfolderBase]: 6190/9581 cut-off events. [2024-06-28 04:05:11,726 INFO L125 PetriNetUnfolderBase]: For 779619/779625 co-relation queries the response was YES. [2024-06-28 04:05:11,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65341 conditions, 9581 events. 6190/9581 cut-off events. For 779619/779625 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 58157 event pairs, 2447 based on Foata normal form. 14/9595 useless extension candidates. Maximal degree in co-relation 65224. Up to 9090 conditions per place. [2024-06-28 04:05:11,825 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 335 selfloop transitions, 45 changer transitions 0/383 dead transitions. [2024-06-28 04:05:11,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 383 transitions, 5605 flow [2024-06-28 04:05:11,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:05:11,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:05:11,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 119 transitions. [2024-06-28 04:05:11,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3628048780487805 [2024-06-28 04:05:11,826 INFO L175 Difference]: Start difference. First operand has 254 places, 356 transitions, 4739 flow. Second operand 8 states and 119 transitions. [2024-06-28 04:05:11,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 383 transitions, 5605 flow [2024-06-28 04:05:13,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 383 transitions, 5509 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-28 04:05:13,356 INFO L231 Difference]: Finished difference. Result has 256 places, 356 transitions, 4737 flow [2024-06-28 04:05:13,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4643, PETRI_DIFFERENCE_MINUEND_PLACES=248, 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=4737, PETRI_PLACES=256, PETRI_TRANSITIONS=356} [2024-06-28 04:05:13,357 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 214 predicate places. [2024-06-28 04:05:13,357 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 356 transitions, 4737 flow [2024-06-28 04:05:13,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:05:13,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:05:13,357 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:05:13,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-28 04:05:13,358 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)] === [2024-06-28 04:05:13,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:05:13,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1877187458, now seen corresponding path program 1 times [2024-06-28 04:05:13,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:05:13,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171242120] [2024-06-28 04:05:13,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:05:13,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:05:13,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:05:16,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:05:16,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:05:16,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171242120] [2024-06-28 04:05:16,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171242120] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:05:16,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:05:16,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:05:16,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713806656] [2024-06-28 04:05:16,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:05:16,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:05:16,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:05:16,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:05:16,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:05:16,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-28 04:05:16,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 356 transitions, 4737 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:05:16,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:05:16,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-28 04:05:16,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:05:18,983 INFO L124 PetriNetUnfolderBase]: 6238/9680 cut-off events. [2024-06-28 04:05:18,984 INFO L125 PetriNetUnfolderBase]: For 811671/811671 co-relation queries the response was YES. [2024-06-28 04:05:19,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66223 conditions, 9680 events. 6238/9680 cut-off events. For 811671/811671 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 59324 event pairs, 3542 based on Foata normal form. 8/9688 useless extension candidates. Maximal degree in co-relation 66105. Up to 9374 conditions per place. [2024-06-28 04:05:19,079 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 365 selfloop transitions, 22 changer transitions 0/390 dead transitions. [2024-06-28 04:05:19,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 390 transitions, 5803 flow [2024-06-28 04:05:19,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:05:19,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:05:19,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-28 04:05:19,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4076655052264808 [2024-06-28 04:05:19,080 INFO L175 Difference]: Start difference. First operand has 256 places, 356 transitions, 4737 flow. Second operand 7 states and 117 transitions. [2024-06-28 04:05:19,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 390 transitions, 5803 flow [2024-06-28 04:05:20,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 390 transitions, 5480 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-28 04:05:20,619 INFO L231 Difference]: Finished difference. Result has 254 places, 358 transitions, 4492 flow [2024-06-28 04:05:20,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4414, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4492, PETRI_PLACES=254, PETRI_TRANSITIONS=358} [2024-06-28 04:05:20,620 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 212 predicate places. [2024-06-28 04:05:20,620 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 358 transitions, 4492 flow [2024-06-28 04:05:20,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:05:20,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:05:20,620 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:05:20,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-28 04:05:20,620 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)] === [2024-06-28 04:05:20,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:05:20,621 INFO L85 PathProgramCache]: Analyzing trace with hash -570211644, now seen corresponding path program 1 times [2024-06-28 04:05:20,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:05:20,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64871542] [2024-06-28 04:05:20,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:05:20,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:05:20,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:05:23,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:05:23,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:05:23,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64871542] [2024-06-28 04:05:23,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64871542] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:05:23,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:05:23,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:05:23,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174432248] [2024-06-28 04:05:23,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:05:23,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:05:23,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:05:23,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:05:23,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:05:23,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-28 04:05:23,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 358 transitions, 4492 flow. Second operand has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 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) [2024-06-28 04:05:23,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:05:23,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-28 04:05:23,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:05:26,118 INFO L124 PetriNetUnfolderBase]: 6220/9654 cut-off events. [2024-06-28 04:05:26,118 INFO L125 PetriNetUnfolderBase]: For 807281/807281 co-relation queries the response was YES. [2024-06-28 04:05:26,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64783 conditions, 9654 events. 6220/9654 cut-off events. For 807281/807281 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 59121 event pairs, 3532 based on Foata normal form. 8/9662 useless extension candidates. Maximal degree in co-relation 64667. Up to 9366 conditions per place. [2024-06-28 04:05:26,204 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 362 selfloop transitions, 24 changer transitions 0/389 dead transitions. [2024-06-28 04:05:26,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 389 transitions, 5384 flow [2024-06-28 04:05:26,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:05:26,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:05:26,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-28 04:05:26,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-28 04:05:26,206 INFO L175 Difference]: Start difference. First operand has 254 places, 358 transitions, 4492 flow. Second operand 8 states and 123 transitions. [2024-06-28 04:05:26,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 389 transitions, 5384 flow [2024-06-28 04:05:27,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 389 transitions, 5351 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-28 04:05:27,656 INFO L231 Difference]: Finished difference. Result has 259 places, 358 transitions, 4512 flow [2024-06-28 04:05:27,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4459, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4512, PETRI_PLACES=259, PETRI_TRANSITIONS=358} [2024-06-28 04:05:27,657 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 217 predicate places. [2024-06-28 04:05:27,657 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 358 transitions, 4512 flow [2024-06-28 04:05:27,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 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) [2024-06-28 04:05:27,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:05:27,657 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:05:27,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-28 04:05:27,657 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)] === [2024-06-28 04:05:27,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:05:27,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1172386244, now seen corresponding path program 2 times [2024-06-28 04:05:27,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:05:27,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908264333] [2024-06-28 04:05:27,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:05:27,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:05:27,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:05:30,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:05:30,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:05:30,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908264333] [2024-06-28 04:05:30,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908264333] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:05:30,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:05:30,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:05:30,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335698320] [2024-06-28 04:05:30,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:05:30,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:05:30,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:05:30,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:05:30,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:05:30,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-28 04:05:30,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 358 transitions, 4512 flow. Second operand has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 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) [2024-06-28 04:05:30,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:05:30,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-28 04:05:30,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:05:32,784 INFO L124 PetriNetUnfolderBase]: 6202/9631 cut-off events. [2024-06-28 04:05:32,785 INFO L125 PetriNetUnfolderBase]: For 809018/809024 co-relation queries the response was YES. [2024-06-28 04:05:32,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64465 conditions, 9631 events. 6202/9631 cut-off events. For 809018/809024 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 59016 event pairs, 3492 based on Foata normal form. 14/9645 useless extension candidates. Maximal degree in co-relation 64347. Up to 9294 conditions per place. [2024-06-28 04:05:32,895 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 359 selfloop transitions, 24 changer transitions 0/386 dead transitions. [2024-06-28 04:05:32,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 386 transitions, 5388 flow [2024-06-28 04:05:32,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:05:32,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:05:32,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-28 04:05:32,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3867595818815331 [2024-06-28 04:05:32,897 INFO L175 Difference]: Start difference. First operand has 259 places, 358 transitions, 4512 flow. Second operand 7 states and 111 transitions. [2024-06-28 04:05:32,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 386 transitions, 5388 flow [2024-06-28 04:05:34,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 386 transitions, 5310 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-28 04:05:34,750 INFO L231 Difference]: Finished difference. Result has 259 places, 358 transitions, 4486 flow [2024-06-28 04:05:34,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4434, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4486, PETRI_PLACES=259, PETRI_TRANSITIONS=358} [2024-06-28 04:05:34,750 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 217 predicate places. [2024-06-28 04:05:34,750 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 358 transitions, 4486 flow [2024-06-28 04:05:34,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 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) [2024-06-28 04:05:34,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:05:34,751 INFO 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] [2024-06-28 04:05:34,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-28 04:05:34,751 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)] === [2024-06-28 04:05:34,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:05:34,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1671848806, now seen corresponding path program 1 times [2024-06-28 04:05:34,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:05:34,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459135863] [2024-06-28 04:05:34,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:05:34,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:05:34,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:05:38,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:05:38,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:05:38,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459135863] [2024-06-28 04:05:38,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459135863] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:05:38,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:05:38,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:05:38,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324304399] [2024-06-28 04:05:38,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:05:38,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:05:38,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:05:38,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:05:38,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:05:38,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-28 04:05:38,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 358 transitions, 4486 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:05:38,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:05:38,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-28 04:05:38,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:05:41,164 INFO L124 PetriNetUnfolderBase]: 6254/9703 cut-off events. [2024-06-28 04:05:41,164 INFO L125 PetriNetUnfolderBase]: For 848715/848715 co-relation queries the response was YES. [2024-06-28 04:05:41,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65158 conditions, 9703 events. 6254/9703 cut-off events. For 848715/848715 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 59476 event pairs, 2634 based on Foata normal form. 14/9717 useless extension candidates. Maximal degree in co-relation 65040. Up to 9002 conditions per place. [2024-06-28 04:05:41,272 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 283 selfloop transitions, 105 changer transitions 0/391 dead transitions. [2024-06-28 04:05:41,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 391 transitions, 5422 flow [2024-06-28 04:05:41,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:05:41,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:05:41,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 139 transitions. [2024-06-28 04:05:41,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37669376693766937 [2024-06-28 04:05:41,274 INFO L175 Difference]: Start difference. First operand has 259 places, 358 transitions, 4486 flow. Second operand 9 states and 139 transitions. [2024-06-28 04:05:41,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 391 transitions, 5422 flow [2024-06-28 04:05:42,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 391 transitions, 5350 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-28 04:05:42,982 INFO L231 Difference]: Finished difference. Result has 262 places, 360 transitions, 4698 flow [2024-06-28 04:05:42,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4414, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4698, PETRI_PLACES=262, PETRI_TRANSITIONS=360} [2024-06-28 04:05:42,983 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 220 predicate places. [2024-06-28 04:05:42,983 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 360 transitions, 4698 flow [2024-06-28 04:05:42,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:05:42,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:05:42,984 INFO 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] [2024-06-28 04:05:42,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-28 04:05:42,984 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)] === [2024-06-28 04:05:42,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:05:42,984 INFO L85 PathProgramCache]: Analyzing trace with hash 652076534, now seen corresponding path program 2 times [2024-06-28 04:05:42,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:05:42,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720940314] [2024-06-28 04:05:42,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:05:42,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:05:42,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:05:46,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:05:46,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:05:46,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720940314] [2024-06-28 04:05:46,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720940314] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:05:46,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:05:46,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:05:46,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695983843] [2024-06-28 04:05:46,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:05:46,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:05:46,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:05:46,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:05:46,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:05:46,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-28 04:05:46,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 360 transitions, 4698 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:05:46,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:05:46,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-28 04:05:46,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:05:48,694 INFO L124 PetriNetUnfolderBase]: 6262/9709 cut-off events. [2024-06-28 04:05:48,694 INFO L125 PetriNetUnfolderBase]: For 838983/839012 co-relation queries the response was YES. [2024-06-28 04:05:48,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65922 conditions, 9709 events. 6262/9709 cut-off events. For 838983/839012 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 59468 event pairs, 2564 based on Foata normal form. 24/9733 useless extension candidates. Maximal degree in co-relation 65804. Up to 9174 conditions per place. [2024-06-28 04:05:48,797 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 279 selfloop transitions, 101 changer transitions 0/383 dead transitions. [2024-06-28 04:05:48,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 383 transitions, 5574 flow [2024-06-28 04:05:48,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:05:48,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:05:48,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 118 transitions. [2024-06-28 04:05:48,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3597560975609756 [2024-06-28 04:05:48,798 INFO L175 Difference]: Start difference. First operand has 262 places, 360 transitions, 4698 flow. Second operand 8 states and 118 transitions. [2024-06-28 04:05:48,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 383 transitions, 5574 flow [2024-06-28 04:05:50,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 383 transitions, 5334 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-28 04:05:50,316 INFO L231 Difference]: Finished difference. Result has 263 places, 362 transitions, 4726 flow [2024-06-28 04:05:50,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4460, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4726, PETRI_PLACES=263, PETRI_TRANSITIONS=362} [2024-06-28 04:05:50,323 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 221 predicate places. [2024-06-28 04:05:50,323 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 362 transitions, 4726 flow [2024-06-28 04:05:50,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:05:50,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:05:50,323 INFO 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] [2024-06-28 04:05:50,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-28 04:05:50,323 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)] === [2024-06-28 04:05:50,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:05:50,324 INFO L85 PathProgramCache]: Analyzing trace with hash 652343444, now seen corresponding path program 3 times [2024-06-28 04:05:50,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:05:50,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165116819] [2024-06-28 04:05:50,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:05:50,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:05:50,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:05:53,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:05:53,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:05:53,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165116819] [2024-06-28 04:05:53,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165116819] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:05:53,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:05:53,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:05:53,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519064971] [2024-06-28 04:05:53,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:05:53,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:05:53,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:05:53,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:05:53,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:05:53,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-28 04:05:53,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 362 transitions, 4726 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:05:53,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:05:53,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-28 04:05:53,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:05:56,095 INFO L124 PetriNetUnfolderBase]: 6270/9721 cut-off events. [2024-06-28 04:05:56,096 INFO L125 PetriNetUnfolderBase]: For 799300/799329 co-relation queries the response was YES. [2024-06-28 04:05:56,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65243 conditions, 9721 events. 6270/9721 cut-off events. For 799300/799329 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 59576 event pairs, 2490 based on Foata normal form. 24/9745 useless extension candidates. Maximal degree in co-relation 65124. Up to 8978 conditions per place. [2024-06-28 04:05:56,185 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 279 selfloop transitions, 108 changer transitions 0/390 dead transitions. [2024-06-28 04:05:56,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 390 transitions, 5650 flow [2024-06-28 04:05:56,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:05:56,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:05:56,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-28 04:05:56,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3780487804878049 [2024-06-28 04:05:56,187 INFO L175 Difference]: Start difference. First operand has 263 places, 362 transitions, 4726 flow. Second operand 8 states and 124 transitions. [2024-06-28 04:05:56,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 390 transitions, 5650 flow [2024-06-28 04:05:57,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 390 transitions, 5406 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-28 04:05:57,544 INFO L231 Difference]: Finished difference. Result has 265 places, 364 transitions, 4764 flow [2024-06-28 04:05:57,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4484, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4764, PETRI_PLACES=265, PETRI_TRANSITIONS=364} [2024-06-28 04:05:57,545 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 223 predicate places. [2024-06-28 04:05:57,545 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 364 transitions, 4764 flow [2024-06-28 04:05:57,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:05:57,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:05:57,545 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:05:57,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-28 04:05:57,546 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)] === [2024-06-28 04:05:57,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:05:57,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1705829581, now seen corresponding path program 1 times [2024-06-28 04:05:57,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:05:57,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691487881] [2024-06-28 04:05:57,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:05:57,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:05:57,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:06:00,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:06:00,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:06:00,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691487881] [2024-06-28 04:06:00,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691487881] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:06:00,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:06:00,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:06:00,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212578248] [2024-06-28 04:06:00,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:06:00,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:06:00,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:06:00,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:06:00,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:06:00,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-28 04:06:00,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 364 transitions, 4764 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:06:00,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:06:00,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-28 04:06:00,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:06:03,923 INFO L124 PetriNetUnfolderBase]: 6310/9775 cut-off events. [2024-06-28 04:06:03,924 INFO L125 PetriNetUnfolderBase]: For 814477/814477 co-relation queries the response was YES. [2024-06-28 04:06:03,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65520 conditions, 9775 events. 6310/9775 cut-off events. For 814477/814477 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 59871 event pairs, 2431 based on Foata normal form. 8/9783 useless extension candidates. Maximal degree in co-relation 65400. Up to 7362 conditions per place. [2024-06-28 04:06:04,010 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 212 selfloop transitions, 217 changer transitions 0/432 dead transitions. [2024-06-28 04:06:04,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 432 transitions, 6132 flow [2024-06-28 04:06:04,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-28 04:06:04,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-28 04:06:04,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 212 transitions. [2024-06-28 04:06:04,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3977485928705441 [2024-06-28 04:06:04,012 INFO L175 Difference]: Start difference. First operand has 265 places, 364 transitions, 4764 flow. Second operand 13 states and 212 transitions. [2024-06-28 04:06:04,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 432 transitions, 6132 flow [2024-06-28 04:06:05,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 432 transitions, 5868 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-28 04:06:05,422 INFO L231 Difference]: Finished difference. Result has 272 places, 367 transitions, 4970 flow [2024-06-28 04:06:05,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4504, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=214, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4970, PETRI_PLACES=272, PETRI_TRANSITIONS=367} [2024-06-28 04:06:05,423 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 230 predicate places. [2024-06-28 04:06:05,423 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 367 transitions, 4970 flow [2024-06-28 04:06:05,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:06:05,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:06:05,423 INFO 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] [2024-06-28 04:06:05,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-28 04:06:05,424 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)] === [2024-06-28 04:06:05,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:06:05,424 INFO L85 PathProgramCache]: Analyzing trace with hash 2092263901, now seen corresponding path program 2 times [2024-06-28 04:06:05,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:06:05,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912359149] [2024-06-28 04:06:05,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:06:05,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:06:05,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:06:08,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:06:08,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:06:08,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912359149] [2024-06-28 04:06:08,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912359149] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:06:08,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:06:08,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:06:08,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67725851] [2024-06-28 04:06:08,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:06:08,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:06:08,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:06:08,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:06:08,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:06:08,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-28 04:06:08,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 367 transitions, 4970 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:06:08,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:06:08,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-28 04:06:08,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:06:11,258 INFO L124 PetriNetUnfolderBase]: 6286/9743 cut-off events. [2024-06-28 04:06:11,259 INFO L125 PetriNetUnfolderBase]: For 797295/797295 co-relation queries the response was YES. [2024-06-28 04:06:11,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65745 conditions, 9743 events. 6286/9743 cut-off events. For 797295/797295 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 59769 event pairs, 2427 based on Foata normal form. 8/9751 useless extension candidates. Maximal degree in co-relation 65624. Up to 7350 conditions per place. [2024-06-28 04:06:11,365 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 211 selfloop transitions, 217 changer transitions 0/431 dead transitions. [2024-06-28 04:06:11,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 431 transitions, 6166 flow [2024-06-28 04:06:11,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-28 04:06:11,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-28 04:06:11,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 211 transitions. [2024-06-28 04:06:11,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39587242026266417 [2024-06-28 04:06:11,367 INFO L175 Difference]: Start difference. First operand has 272 places, 367 transitions, 4970 flow. Second operand 13 states and 211 transitions. [2024-06-28 04:06:11,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 431 transitions, 6166 flow [2024-06-28 04:06:12,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 431 transitions, 5661 flow, removed 8 selfloop flow, removed 11 redundant places. [2024-06-28 04:06:12,663 INFO L231 Difference]: Finished difference. Result has 274 places, 367 transitions, 4905 flow [2024-06-28 04:06:12,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4465, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=217, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4905, PETRI_PLACES=274, PETRI_TRANSITIONS=367} [2024-06-28 04:06:12,664 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 232 predicate places. [2024-06-28 04:06:12,664 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 367 transitions, 4905 flow [2024-06-28 04:06:12,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:06:12,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:06:12,664 INFO 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] [2024-06-28 04:06:12,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-28 04:06:12,665 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)] === [2024-06-28 04:06:12,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:06:12,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1718615224, now seen corresponding path program 4 times [2024-06-28 04:06:12,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:06:12,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253973952] [2024-06-28 04:06:12,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:06:12,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:06:12,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:06:16,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:06:16,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:06:16,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253973952] [2024-06-28 04:06:16,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253973952] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:06:16,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:06:16,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:06:16,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113756762] [2024-06-28 04:06:16,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:06:16,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:06:16,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:06:16,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:06:16,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:06:16,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-28 04:06:16,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 367 transitions, 4905 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:06:16,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:06:16,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-28 04:06:16,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:06:18,585 INFO L124 PetriNetUnfolderBase]: 6338/9827 cut-off events. [2024-06-28 04:06:18,585 INFO L125 PetriNetUnfolderBase]: For 834411/834411 co-relation queries the response was YES. [2024-06-28 04:06:18,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66392 conditions, 9827 events. 6338/9827 cut-off events. For 834411/834411 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 60360 event pairs, 2556 based on Foata normal form. 14/9841 useless extension candidates. Maximal degree in co-relation 66270. Up to 9104 conditions per place. [2024-06-28 04:06:18,699 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 280 selfloop transitions, 114 changer transitions 0/397 dead transitions. [2024-06-28 04:06:18,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 397 transitions, 5847 flow [2024-06-28 04:06:18,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:06:18,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:06:18,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-28 04:06:18,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3871951219512195 [2024-06-28 04:06:18,702 INFO L175 Difference]: Start difference. First operand has 274 places, 367 transitions, 4905 flow. Second operand 8 states and 127 transitions. [2024-06-28 04:06:18,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 397 transitions, 5847 flow [2024-06-28 04:06:20,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 397 transitions, 5413 flow, removed 0 selfloop flow, removed 12 redundant places. [2024-06-28 04:06:20,380 INFO L231 Difference]: Finished difference. Result has 270 places, 369 transitions, 4763 flow [2024-06-28 04:06:20,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4471, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4763, PETRI_PLACES=270, PETRI_TRANSITIONS=369} [2024-06-28 04:06:20,380 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 228 predicate places. [2024-06-28 04:06:20,380 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 369 transitions, 4763 flow [2024-06-28 04:06:20,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:06:20,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:06:20,381 INFO 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] [2024-06-28 04:06:20,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-28 04:06:20,381 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)] === [2024-06-28 04:06:20,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:06:20,382 INFO L85 PathProgramCache]: Analyzing trace with hash 1896889684, now seen corresponding path program 5 times [2024-06-28 04:06:20,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:06:20,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163497473] [2024-06-28 04:06:20,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:06:20,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:06:20,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:06:23,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:06:23,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:06:23,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163497473] [2024-06-28 04:06:23,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163497473] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:06:23,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:06:23,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:06:23,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095011429] [2024-06-28 04:06:23,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:06:23,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:06:23,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:06:23,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:06:23,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:06:23,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-28 04:06:23,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 369 transitions, 4763 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:06:23,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:06:23,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-28 04:06:23,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:06:26,415 INFO L124 PetriNetUnfolderBase]: 6462/10015 cut-off events. [2024-06-28 04:06:26,416 INFO L125 PetriNetUnfolderBase]: For 890267/890267 co-relation queries the response was YES. [2024-06-28 04:06:26,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68069 conditions, 10015 events. 6462/10015 cut-off events. For 890267/890267 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 61698 event pairs, 2560 based on Foata normal form. 14/10029 useless extension candidates. Maximal degree in co-relation 67946. Up to 8960 conditions per place. [2024-06-28 04:06:26,530 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 282 selfloop transitions, 120 changer transitions 0/405 dead transitions. [2024-06-28 04:06:26,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 405 transitions, 5931 flow [2024-06-28 04:06:26,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:06:26,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:06:26,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-28 04:06:26,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-28 04:06:26,532 INFO L175 Difference]: Start difference. First operand has 270 places, 369 transitions, 4763 flow. Second operand 8 states and 132 transitions. [2024-06-28 04:06:26,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 405 transitions, 5931 flow [2024-06-28 04:06:28,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 405 transitions, 5659 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-28 04:06:28,557 INFO L231 Difference]: Finished difference. Result has 272 places, 372 transitions, 4826 flow [2024-06-28 04:06:28,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4491, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4826, PETRI_PLACES=272, PETRI_TRANSITIONS=372} [2024-06-28 04:06:28,558 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 230 predicate places. [2024-06-28 04:06:28,558 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 372 transitions, 4826 flow [2024-06-28 04:06:28,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:06:28,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:06:28,558 INFO 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] [2024-06-28 04:06:28,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-28 04:06:28,559 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)] === [2024-06-28 04:06:28,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:06:28,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1718234265, now seen corresponding path program 3 times [2024-06-28 04:06:28,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:06:28,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006621226] [2024-06-28 04:06:28,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:06:28,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:06:28,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:06:31,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:06:31,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:06:31,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006621226] [2024-06-28 04:06:31,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006621226] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:06:31,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:06:31,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:06:31,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786206075] [2024-06-28 04:06:31,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:06:31,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:06:31,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:06:31,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:06:31,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:06:31,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-28 04:06:31,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 372 transitions, 4826 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:06:31,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:06:31,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-28 04:06:31,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:06:34,674 INFO L124 PetriNetUnfolderBase]: 6566/10159 cut-off events. [2024-06-28 04:06:34,674 INFO L125 PetriNetUnfolderBase]: For 918572/918572 co-relation queries the response was YES. [2024-06-28 04:06:34,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69418 conditions, 10159 events. 6566/10159 cut-off events. For 918572/918572 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 62370 event pairs, 2476 based on Foata normal form. 8/10167 useless extension candidates. Maximal degree in co-relation 69294. Up to 7678 conditions per place. [2024-06-28 04:06:34,783 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 201 selfloop transitions, 224 changer transitions 0/428 dead transitions. [2024-06-28 04:06:34,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 428 transitions, 6170 flow [2024-06-28 04:06:34,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-28 04:06:34,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-28 04:06:34,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 206 transitions. [2024-06-28 04:06:34,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3588850174216028 [2024-06-28 04:06:34,785 INFO L175 Difference]: Start difference. First operand has 272 places, 372 transitions, 4826 flow. Second operand 14 states and 206 transitions. [2024-06-28 04:06:34,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 428 transitions, 6170 flow [2024-06-28 04:06:36,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 428 transitions, 5982 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-28 04:06:36,929 INFO L231 Difference]: Finished difference. Result has 282 places, 378 transitions, 5150 flow [2024-06-28 04:06:36,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4638, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=218, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=5150, PETRI_PLACES=282, PETRI_TRANSITIONS=378} [2024-06-28 04:06:36,930 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 240 predicate places. [2024-06-28 04:06:36,931 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 378 transitions, 5150 flow [2024-06-28 04:06:36,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:06:36,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:06:36,931 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:06:36,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-28 04:06:36,932 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)] === [2024-06-28 04:06:36,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:06:36,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1718228685, now seen corresponding path program 4 times [2024-06-28 04:06:36,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:06:36,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506272884] [2024-06-28 04:06:36,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:06:36,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:06:36,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:06:39,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:06:39,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:06:39,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506272884] [2024-06-28 04:06:39,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506272884] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:06:39,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:06:39,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:06:39,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322555834] [2024-06-28 04:06:39,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:06:39,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:06:39,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:06:39,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:06:39,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:06:39,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-28 04:06:39,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 378 transitions, 5150 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:06:39,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:06:39,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-28 04:06:39,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:06:42,969 INFO L124 PetriNetUnfolderBase]: 6542/10127 cut-off events. [2024-06-28 04:06:42,969 INFO L125 PetriNetUnfolderBase]: For 921141/921141 co-relation queries the response was YES. [2024-06-28 04:06:43,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70096 conditions, 10127 events. 6542/10127 cut-off events. For 921141/921141 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 62182 event pairs, 2472 based on Foata normal form. 8/10135 useless extension candidates. Maximal degree in co-relation 69970. Up to 7666 conditions per place. [2024-06-28 04:06:43,069 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 202 selfloop transitions, 222 changer transitions 0/427 dead transitions. [2024-06-28 04:06:43,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 427 transitions, 6286 flow [2024-06-28 04:06:43,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-28 04:06:43,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-28 04:06:43,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 197 transitions. [2024-06-28 04:06:43,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3696060037523452 [2024-06-28 04:06:43,072 INFO L175 Difference]: Start difference. First operand has 282 places, 378 transitions, 5150 flow. Second operand 13 states and 197 transitions. [2024-06-28 04:06:43,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 427 transitions, 6286 flow [2024-06-28 04:06:44,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 427 transitions, 5913 flow, removed 8 selfloop flow, removed 10 redundant places. [2024-06-28 04:06:44,580 INFO L231 Difference]: Finished difference. Result has 285 places, 378 transitions, 5227 flow [2024-06-28 04:06:44,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4777, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=222, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5227, PETRI_PLACES=285, PETRI_TRANSITIONS=378} [2024-06-28 04:06:44,581 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 243 predicate places. [2024-06-28 04:06:44,582 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 378 transitions, 5227 flow [2024-06-28 04:06:44,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:06:44,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:06:44,582 INFO 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] [2024-06-28 04:06:44,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-28 04:06:44,583 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)] === [2024-06-28 04:06:44,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:06:44,583 INFO L85 PathProgramCache]: Analyzing trace with hash 2043487014, now seen corresponding path program 6 times [2024-06-28 04:06:44,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:06:44,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368642506] [2024-06-28 04:06:44,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:06:44,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:06:44,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:06:47,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:06:47,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:06:47,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368642506] [2024-06-28 04:06:47,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368642506] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:06:47,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:06:47,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:06:47,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351173518] [2024-06-28 04:06:47,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:06:47,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:06:47,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:06:47,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:06:47,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:06:47,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-28 04:06:47,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 378 transitions, 5227 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:06:47,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:06:47,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-28 04:06:47,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:06:50,180 INFO L124 PetriNetUnfolderBase]: 6550/10147 cut-off events. [2024-06-28 04:06:50,180 INFO L125 PetriNetUnfolderBase]: For 931703/931734 co-relation queries the response was YES. [2024-06-28 04:06:50,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70671 conditions, 10147 events. 6550/10147 cut-off events. For 931703/931734 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 62602 event pairs, 2667 based on Foata normal form. 17/10164 useless extension candidates. Maximal degree in co-relation 70544. Up to 9468 conditions per place. [2024-06-28 04:06:50,300 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 284 selfloop transitions, 113 changer transitions 0/400 dead transitions. [2024-06-28 04:06:50,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 400 transitions, 6141 flow [2024-06-28 04:06:50,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:06:50,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:06:50,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 119 transitions. [2024-06-28 04:06:50,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3628048780487805 [2024-06-28 04:06:50,302 INFO L175 Difference]: Start difference. First operand has 285 places, 378 transitions, 5227 flow. Second operand 8 states and 119 transitions. [2024-06-28 04:06:50,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 400 transitions, 6141 flow [2024-06-28 04:06:52,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 400 transitions, 5697 flow, removed 0 selfloop flow, removed 12 redundant places. [2024-06-28 04:06:52,172 INFO L231 Difference]: Finished difference. Result has 281 places, 380 transitions, 5080 flow [2024-06-28 04:06:52,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4783, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5080, PETRI_PLACES=281, PETRI_TRANSITIONS=380} [2024-06-28 04:06:52,172 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 239 predicate places. [2024-06-28 04:06:52,172 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 380 transitions, 5080 flow [2024-06-28 04:06:52,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:06:52,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:06:52,173 INFO 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] [2024-06-28 04:06:52,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-28 04:06:52,173 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)] === [2024-06-28 04:06:52,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:06:52,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1560430572, now seen corresponding path program 7 times [2024-06-28 04:06:52,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:06:52,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349945918] [2024-06-28 04:06:52,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:06:52,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:06:52,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:06:55,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:06:55,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:06:55,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349945918] [2024-06-28 04:06:55,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349945918] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:06:55,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:06:55,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:06:55,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376939938] [2024-06-28 04:06:55,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:06:55,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:06:55,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:06:55,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:06:55,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:06:55,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-28 04:06:55,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 380 transitions, 5080 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:06:55,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:06:55,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-28 04:06:55,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:06:57,912 INFO L124 PetriNetUnfolderBase]: 6571/10178 cut-off events. [2024-06-28 04:06:57,912 INFO L125 PetriNetUnfolderBase]: For 958997/959028 co-relation queries the response was YES. [2024-06-28 04:06:57,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70600 conditions, 10178 events. 6571/10178 cut-off events. For 958997/959028 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 62863 event pairs, 2666 based on Foata normal form. 17/10195 useless extension candidates. Maximal degree in co-relation 70472. Up to 9418 conditions per place. [2024-06-28 04:06:58,035 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 287 selfloop transitions, 120 changer transitions 0/410 dead transitions. [2024-06-28 04:06:58,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 410 transitions, 6272 flow [2024-06-28 04:06:58,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:06:58,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:06:58,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-28 04:06:58,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38109756097560976 [2024-06-28 04:06:58,037 INFO L175 Difference]: Start difference. First operand has 281 places, 380 transitions, 5080 flow. Second operand 8 states and 125 transitions. [2024-06-28 04:06:58,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 410 transitions, 6272 flow [2024-06-28 04:07:00,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 410 transitions, 5991 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-28 04:07:00,160 INFO L231 Difference]: Finished difference. Result has 283 places, 384 transitions, 5180 flow [2024-06-28 04:07:00,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4799, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5180, PETRI_PLACES=283, PETRI_TRANSITIONS=384} [2024-06-28 04:07:00,160 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 241 predicate places. [2024-06-28 04:07:00,160 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 384 transitions, 5180 flow [2024-06-28 04:07:00,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:07:00,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:07:00,161 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:07:00,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-28 04:07:00,161 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)] === [2024-06-28 04:07:00,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:07:00,162 INFO L85 PathProgramCache]: Analyzing trace with hash 345875494, now seen corresponding path program 8 times [2024-06-28 04:07:00,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:07:00,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182430704] [2024-06-28 04:07:00,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:07:00,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:07:00,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:07:03,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:07:03,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:07:03,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182430704] [2024-06-28 04:07:03,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182430704] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:07:03,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:07:03,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:07:03,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022818048] [2024-06-28 04:07:03,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:07:03,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:07:03,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:07:03,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:07:03,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:07:03,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-28 04:07:03,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 384 transitions, 5180 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:07:03,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:07:03,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-28 04:07:03,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:07:05,905 INFO L124 PetriNetUnfolderBase]: 6566/10171 cut-off events. [2024-06-28 04:07:05,905 INFO L125 PetriNetUnfolderBase]: For 976782/976813 co-relation queries the response was YES. [2024-06-28 04:07:05,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70703 conditions, 10171 events. 6566/10171 cut-off events. For 976782/976813 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 62823 event pairs, 2675 based on Foata normal form. 17/10188 useless extension candidates. Maximal degree in co-relation 70574. Up to 9492 conditions per place. [2024-06-28 04:07:06,023 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 284 selfloop transitions, 116 changer transitions 0/403 dead transitions. [2024-06-28 04:07:06,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 403 transitions, 6036 flow [2024-06-28 04:07:06,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:07:06,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:07:06,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 118 transitions. [2024-06-28 04:07:06,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3597560975609756 [2024-06-28 04:07:06,025 INFO L175 Difference]: Start difference. First operand has 283 places, 384 transitions, 5180 flow. Second operand 8 states and 118 transitions. [2024-06-28 04:07:06,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 403 transitions, 6036 flow [2024-06-28 04:07:07,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 403 transitions, 5721 flow, removed 56 selfloop flow, removed 5 redundant places. [2024-06-28 04:07:07,981 INFO L231 Difference]: Finished difference. Result has 286 places, 384 transitions, 5102 flow [2024-06-28 04:07:07,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4865, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5102, PETRI_PLACES=286, PETRI_TRANSITIONS=384} [2024-06-28 04:07:07,981 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 244 predicate places. [2024-06-28 04:07:07,981 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 384 transitions, 5102 flow [2024-06-28 04:07:07,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:07:07,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:07:07,982 INFO 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] [2024-06-28 04:07:07,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-28 04:07:07,982 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)] === [2024-06-28 04:07:07,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:07:07,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1060791569, now seen corresponding path program 5 times [2024-06-28 04:07:07,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:07:07,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310713795] [2024-06-28 04:07:07,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:07:07,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:07:07,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:07:10,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:07:10,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:07:10,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310713795] [2024-06-28 04:07:10,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310713795] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:07:10,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:07:10,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:07:10,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547324959] [2024-06-28 04:07:10,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:07:10,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:07:10,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:07:10,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:07:10,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:07:10,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-28 04:07:10,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 384 transitions, 5102 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:07:10,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:07:10,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-28 04:07:10,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:07:13,820 INFO L124 PetriNetUnfolderBase]: 6542/10127 cut-off events. [2024-06-28 04:07:13,820 INFO L125 PetriNetUnfolderBase]: For 989745/989777 co-relation queries the response was YES. [2024-06-28 04:07:13,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70142 conditions, 10127 events. 6542/10127 cut-off events. For 989745/989777 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 62228 event pairs, 2101 based on Foata normal form. 18/10145 useless extension candidates. Maximal degree in co-relation 70012. Up to 7324 conditions per place. [2024-06-28 04:07:13,945 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 203 selfloop transitions, 215 changer transitions 0/421 dead transitions. [2024-06-28 04:07:13,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 421 transitions, 6196 flow [2024-06-28 04:07:13,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 04:07:13,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 04:07:13,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 166 transitions. [2024-06-28 04:07:13,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36807095343680707 [2024-06-28 04:07:13,947 INFO L175 Difference]: Start difference. First operand has 286 places, 384 transitions, 5102 flow. Second operand 11 states and 166 transitions. [2024-06-28 04:07:13,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 421 transitions, 6196 flow [2024-06-28 04:07:16,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 421 transitions, 5940 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-28 04:07:16,061 INFO L231 Difference]: Finished difference. Result has 290 places, 384 transitions, 5282 flow [2024-06-28 04:07:16,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4846, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=215, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5282, PETRI_PLACES=290, PETRI_TRANSITIONS=384} [2024-06-28 04:07:16,061 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 248 predicate places. [2024-06-28 04:07:16,062 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 384 transitions, 5282 flow [2024-06-28 04:07:16,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:07:16,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:07:16,062 INFO 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] [2024-06-28 04:07:16,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-28 04:07:16,062 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)] === [2024-06-28 04:07:16,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:07:16,062 INFO L85 PathProgramCache]: Analyzing trace with hash 141878450, now seen corresponding path program 9 times [2024-06-28 04:07:16,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:07:16,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267070024] [2024-06-28 04:07:16,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:07:16,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:07:16,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:07:19,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:07:19,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:07:19,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267070024] [2024-06-28 04:07:19,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267070024] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:07:19,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:07:19,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:07:19,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196127961] [2024-06-28 04:07:19,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:07:19,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:07:19,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:07:19,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:07:19,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:07:19,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-28 04:07:19,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 384 transitions, 5282 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:07:19,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:07:19,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-28 04:07:19,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:07:21,859 INFO L124 PetriNetUnfolderBase]: 6550/10151 cut-off events. [2024-06-28 04:07:21,859 INFO L125 PetriNetUnfolderBase]: For 1001254/1001282 co-relation queries the response was YES. [2024-06-28 04:07:21,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71497 conditions, 10151 events. 6550/10151 cut-off events. For 1001254/1001282 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 62753 event pairs, 2663 based on Foata normal form. 17/10168 useless extension candidates. Maximal degree in co-relation 71366. Up to 9442 conditions per place. [2024-06-28 04:07:21,975 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 279 selfloop transitions, 123 changer transitions 0/405 dead transitions. [2024-06-28 04:07:21,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 405 transitions, 6208 flow [2024-06-28 04:07:21,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:07:21,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:07:21,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 118 transitions. [2024-06-28 04:07:21,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3597560975609756 [2024-06-28 04:07:21,977 INFO L175 Difference]: Start difference. First operand has 290 places, 384 transitions, 5282 flow. Second operand 8 states and 118 transitions. [2024-06-28 04:07:21,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 405 transitions, 6208 flow [2024-06-28 04:07:24,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 405 transitions, 5600 flow, removed 17 selfloop flow, removed 10 redundant places. [2024-06-28 04:07:24,313 INFO L231 Difference]: Finished difference. Result has 288 places, 386 transitions, 4997 flow [2024-06-28 04:07:24,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4674, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4997, PETRI_PLACES=288, PETRI_TRANSITIONS=386} [2024-06-28 04:07:24,314 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 246 predicate places. [2024-06-28 04:07:24,314 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 386 transitions, 4997 flow [2024-06-28 04:07:24,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:07:24,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:07:24,314 INFO 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] [2024-06-28 04:07:24,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-28 04:07:24,314 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)] === [2024-06-28 04:07:24,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:07:24,315 INFO L85 PathProgramCache]: Analyzing trace with hash -558004955, now seen corresponding path program 6 times [2024-06-28 04:07:24,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:07:24,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458294078] [2024-06-28 04:07:24,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:07:24,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:07:24,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:07:27,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:07:27,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:07:27,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458294078] [2024-06-28 04:07:27,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458294078] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:07:27,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:07:27,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:07:27,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326988652] [2024-06-28 04:07:27,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:07:27,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:07:27,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:07:27,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:07:27,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:07:27,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-28 04:07:27,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 386 transitions, 4997 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:07:27,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:07:27,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-28 04:07:27,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:07:30,506 INFO L124 PetriNetUnfolderBase]: 6654/10295 cut-off events. [2024-06-28 04:07:30,507 INFO L125 PetriNetUnfolderBase]: For 1061958/1061986 co-relation queries the response was YES. [2024-06-28 04:07:30,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71841 conditions, 10295 events. 6654/10295 cut-off events. For 1061958/1061986 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 63549 event pairs, 2665 based on Foata normal form. 23/10318 useless extension candidates. Maximal degree in co-relation 71710. Up to 9442 conditions per place. [2024-06-28 04:07:30,617 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 292 selfloop transitions, 132 changer transitions 0/427 dead transitions. [2024-06-28 04:07:30,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 427 transitions, 6151 flow [2024-06-28 04:07:30,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 04:07:30,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 04:07:30,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 171 transitions. [2024-06-28 04:07:30,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3475609756097561 [2024-06-28 04:07:30,619 INFO L175 Difference]: Start difference. First operand has 288 places, 386 transitions, 4997 flow. Second operand 12 states and 171 transitions. [2024-06-28 04:07:30,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 427 transitions, 6151 flow [2024-06-28 04:07:32,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 427 transitions, 5844 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-28 04:07:32,583 INFO L231 Difference]: Finished difference. Result has 294 places, 392 transitions, 5012 flow [2024-06-28 04:07:32,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4690, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5012, PETRI_PLACES=294, PETRI_TRANSITIONS=392} [2024-06-28 04:07:32,583 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 252 predicate places. [2024-06-28 04:07:32,584 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 392 transitions, 5012 flow [2024-06-28 04:07:32,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:07:32,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:07:32,584 INFO 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] [2024-06-28 04:07:32,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-28 04:07:32,584 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)] === [2024-06-28 04:07:32,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:07:32,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1067575603, now seen corresponding path program 7 times [2024-06-28 04:07:32,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:07:32,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544068528] [2024-06-28 04:07:32,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:07:32,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:07:32,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:07:35,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:07:35,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:07:35,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544068528] [2024-06-28 04:07:35,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544068528] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:07:35,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:07:35,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:07:35,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144977173] [2024-06-28 04:07:35,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:07:35,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:07:35,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:07:35,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:07:35,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:07:35,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-28 04:07:35,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 392 transitions, 5012 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:07:35,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:07:35,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-28 04:07:35,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:07:38,588 INFO L124 PetriNetUnfolderBase]: 6694/10351 cut-off events. [2024-06-28 04:07:38,589 INFO L125 PetriNetUnfolderBase]: For 1086878/1086906 co-relation queries the response was YES. [2024-06-28 04:07:38,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72384 conditions, 10351 events. 6694/10351 cut-off events. For 1086878/1086906 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 63919 event pairs, 2679 based on Foata normal form. 23/10374 useless extension candidates. Maximal degree in co-relation 72252. Up to 9562 conditions per place. [2024-06-28 04:07:38,689 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 304 selfloop transitions, 120 changer transitions 0/427 dead transitions. [2024-06-28 04:07:38,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 427 transitions, 6141 flow [2024-06-28 04:07:38,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 04:07:38,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 04:07:38,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 159 transitions. [2024-06-28 04:07:38,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.352549889135255 [2024-06-28 04:07:38,690 INFO L175 Difference]: Start difference. First operand has 294 places, 392 transitions, 5012 flow. Second operand 11 states and 159 transitions. [2024-06-28 04:07:38,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 427 transitions, 6141 flow [2024-06-28 04:07:40,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 427 transitions, 5982 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-28 04:07:40,417 INFO L231 Difference]: Finished difference. Result has 297 places, 395 transitions, 5128 flow [2024-06-28 04:07:40,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4853, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5128, PETRI_PLACES=297, PETRI_TRANSITIONS=395} [2024-06-28 04:07:40,418 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 255 predicate places. [2024-06-28 04:07:40,418 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 395 transitions, 5128 flow [2024-06-28 04:07:40,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:07:40,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:07:40,418 INFO 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] [2024-06-28 04:07:40,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-28 04:07:40,419 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)] === [2024-06-28 04:07:40,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:07:40,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1057066919, now seen corresponding path program 8 times [2024-06-28 04:07:40,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:07:40,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794358144] [2024-06-28 04:07:40,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:07:40,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:07:40,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:07:43,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:07:43,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:07:43,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794358144] [2024-06-28 04:07:43,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794358144] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:07:43,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:07:43,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:07:43,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127292860] [2024-06-28 04:07:43,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:07:43,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:07:43,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:07:43,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:07:43,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:07:43,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-28 04:07:43,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 395 transitions, 5128 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:07:43,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:07:43,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-28 04:07:43,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:07:46,011 INFO L124 PetriNetUnfolderBase]: 6670/10319 cut-off events. [2024-06-28 04:07:46,011 INFO L125 PetriNetUnfolderBase]: For 1084738/1084766 co-relation queries the response was YES. [2024-06-28 04:07:46,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72454 conditions, 10319 events. 6670/10319 cut-off events. For 1084738/1084766 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 63733 event pairs, 2675 based on Foata normal form. 23/10342 useless extension candidates. Maximal degree in co-relation 72320. Up to 9550 conditions per place. [2024-06-28 04:07:46,141 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 306 selfloop transitions, 120 changer transitions 0/429 dead transitions. [2024-06-28 04:07:46,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 429 transitions, 6074 flow [2024-06-28 04:07:46,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 04:07:46,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 04:07:46,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 169 transitions. [2024-06-28 04:07:46,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3434959349593496 [2024-06-28 04:07:46,143 INFO L175 Difference]: Start difference. First operand has 297 places, 395 transitions, 5128 flow. Second operand 12 states and 169 transitions. [2024-06-28 04:07:46,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 429 transitions, 6074 flow [2024-06-28 04:07:48,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 429 transitions, 5744 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-28 04:07:48,325 INFO L231 Difference]: Finished difference. Result has 300 places, 395 transitions, 5044 flow [2024-06-28 04:07:48,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4798, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5044, PETRI_PLACES=300, PETRI_TRANSITIONS=395} [2024-06-28 04:07:48,325 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 258 predicate places. [2024-06-28 04:07:48,325 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 395 transitions, 5044 flow [2024-06-28 04:07:48,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:07:48,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:07:48,326 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] [2024-06-28 04:07:48,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-28 04:07:48,326 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)] === [2024-06-28 04:07:48,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:07:48,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1609520111, now seen corresponding path program 9 times [2024-06-28 04:07:48,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:07:48,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704131646] [2024-06-28 04:07:48,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:07:48,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:07:48,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:07:51,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:07:51,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:07:51,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704131646] [2024-06-28 04:07:51,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704131646] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:07:51,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:07:51,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:07:51,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233591634] [2024-06-28 04:07:51,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:07:51,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:07:51,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:07:51,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:07:51,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:07:51,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-28 04:07:51,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 395 transitions, 5044 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:07:51,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:07:51,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-28 04:07:51,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:07:54,776 INFO L124 PetriNetUnfolderBase]: 6646/10287 cut-off events. [2024-06-28 04:07:54,776 INFO L125 PetriNetUnfolderBase]: For 1079225/1079253 co-relation queries the response was YES. [2024-06-28 04:07:54,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71811 conditions, 10287 events. 6646/10287 cut-off events. For 1079225/1079253 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 63532 event pairs, 2661 based on Foata normal form. 23/10310 useless extension candidates. Maximal degree in co-relation 71676. Up to 9454 conditions per place. [2024-06-28 04:07:54,911 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 294 selfloop transitions, 132 changer transitions 0/429 dead transitions. [2024-06-28 04:07:54,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 429 transitions, 5992 flow [2024-06-28 04:07:54,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 04:07:54,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 04:07:54,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 170 transitions. [2024-06-28 04:07:54,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34552845528455284 [2024-06-28 04:07:54,913 INFO L175 Difference]: Start difference. First operand has 300 places, 395 transitions, 5044 flow. Second operand 12 states and 170 transitions. [2024-06-28 04:07:54,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 429 transitions, 5992 flow [2024-06-28 04:07:57,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 429 transitions, 5617 flow, removed 4 selfloop flow, removed 13 redundant places. [2024-06-28 04:07:57,195 INFO L231 Difference]: Finished difference. Result has 299 places, 395 transitions, 4939 flow [2024-06-28 04:07:57,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4669, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4939, PETRI_PLACES=299, PETRI_TRANSITIONS=395} [2024-06-28 04:07:57,196 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 257 predicate places. [2024-06-28 04:07:57,196 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 395 transitions, 4939 flow [2024-06-28 04:07:57,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:07:57,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:07:57,196 INFO 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] [2024-06-28 04:07:57,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-28 04:07:57,197 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)] === [2024-06-28 04:07:57,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:07:57,197 INFO L85 PathProgramCache]: Analyzing trace with hash -1132333902, now seen corresponding path program 10 times [2024-06-28 04:07:57,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:07:57,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604698286] [2024-06-28 04:07:57,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:07:57,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:07:57,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:08:00,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:08:00,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:08:00,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604698286] [2024-06-28 04:08:00,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604698286] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:08:00,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:08:00,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:08:00,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620403336] [2024-06-28 04:08:00,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:08:00,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:08:00,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:08:00,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:08:00,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:08:00,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-28 04:08:00,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 395 transitions, 4939 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:08:00,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:08:00,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-28 04:08:00,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:08:03,033 INFO L124 PetriNetUnfolderBase]: 6654/10299 cut-off events. [2024-06-28 04:08:03,033 INFO L125 PetriNetUnfolderBase]: For 1083357/1083385 co-relation queries the response was YES. [2024-06-28 04:08:03,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71679 conditions, 10299 events. 6654/10299 cut-off events. For 1083357/1083385 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 63679 event pairs, 2576 based on Foata normal form. 17/10316 useless extension candidates. Maximal degree in co-relation 71544. Up to 9127 conditions per place. [2024-06-28 04:08:03,168 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 286 selfloop transitions, 141 changer transitions 0/430 dead transitions. [2024-06-28 04:08:03,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 430 transitions, 6401 flow [2024-06-28 04:08:03,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:08:03,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:08:03,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-28 04:08:03,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39634146341463417 [2024-06-28 04:08:03,170 INFO L175 Difference]: Start difference. First operand has 299 places, 395 transitions, 4939 flow. Second operand 8 states and 130 transitions. [2024-06-28 04:08:03,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 430 transitions, 6401 flow [2024-06-28 04:08:05,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 430 transitions, 6137 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-06-28 04:08:05,200 INFO L231 Difference]: Finished difference. Result has 296 places, 399 transitions, 5110 flow [2024-06-28 04:08:05,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4675, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5110, PETRI_PLACES=296, PETRI_TRANSITIONS=399} [2024-06-28 04:08:05,216 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 254 predicate places. [2024-06-28 04:08:05,216 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 399 transitions, 5110 flow [2024-06-28 04:08:05,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:08:05,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:08:05,217 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, 1] [2024-06-28 04:08:05,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-28 04:08:05,217 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)] === [2024-06-28 04:08:05,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:08:05,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1116116878, now seen corresponding path program 11 times [2024-06-28 04:08:05,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:08:05,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281914148] [2024-06-28 04:08:05,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:08:05,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:08:05,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:08:08,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:08:08,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:08:08,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281914148] [2024-06-28 04:08:08,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281914148] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:08:08,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:08:08,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:08:08,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965813109] [2024-06-28 04:08:08,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:08:08,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:08:08,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:08:08,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:08:08,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:08:08,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-28 04:08:08,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 399 transitions, 5110 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:08:08,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:08:08,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-28 04:08:08,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:08:11,178 INFO L124 PetriNetUnfolderBase]: 6649/10292 cut-off events. [2024-06-28 04:08:11,178 INFO L125 PetriNetUnfolderBase]: For 1102024/1102052 co-relation queries the response was YES. [2024-06-28 04:08:11,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71928 conditions, 10292 events. 6649/10292 cut-off events. For 1102024/1102052 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 63658 event pairs, 2596 based on Foata normal form. 17/10309 useless extension candidates. Maximal degree in co-relation 71792. Up to 9123 conditions per place. [2024-06-28 04:08:11,307 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 280 selfloop transitions, 141 changer transitions 0/424 dead transitions. [2024-06-28 04:08:11,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 424 transitions, 6212 flow [2024-06-28 04:08:11,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:08:11,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:08:11,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-28 04:08:11,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3780487804878049 [2024-06-28 04:08:11,309 INFO L175 Difference]: Start difference. First operand has 296 places, 399 transitions, 5110 flow. Second operand 8 states and 124 transitions. [2024-06-28 04:08:11,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 424 transitions, 6212 flow [2024-06-28 04:08:13,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 424 transitions, 5809 flow, removed 65 selfloop flow, removed 5 redundant places. [2024-06-28 04:08:13,720 INFO L231 Difference]: Finished difference. Result has 299 places, 399 transitions, 4994 flow [2024-06-28 04:08:13,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4707, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4994, PETRI_PLACES=299, PETRI_TRANSITIONS=399} [2024-06-28 04:08:13,721 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 257 predicate places. [2024-06-28 04:08:13,721 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 399 transitions, 4994 flow [2024-06-28 04:08:13,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:08:13,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:08:13,721 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:08:13,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-28 04:08:13,722 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)] === [2024-06-28 04:08:13,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:08:13,722 INFO L85 PathProgramCache]: Analyzing trace with hash 1564026415, now seen corresponding path program 1 times [2024-06-28 04:08:13,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:08:13,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884737896] [2024-06-28 04:08:13,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:08:13,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:08:13,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:08:16,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:08:16,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:08:16,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884737896] [2024-06-28 04:08:16,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884737896] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:08:16,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:08:16,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-28 04:08:16,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900066909] [2024-06-28 04:08:16,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:08:16,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-28 04:08:16,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:08:16,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-28 04:08:16,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-06-28 04:08:16,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-28 04:08:16,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 399 transitions, 4994 flow. Second operand has 12 states, 12 states have (on average 7.583333333333333) internal successors, (91), 12 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:08:16,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:08:16,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-28 04:08:16,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:08:20,846 INFO L124 PetriNetUnfolderBase]: 10029/15641 cut-off events. [2024-06-28 04:08:20,847 INFO L125 PetriNetUnfolderBase]: For 1962355/1962371 co-relation queries the response was YES. [2024-06-28 04:08:20,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109234 conditions, 15641 events. 10029/15641 cut-off events. For 1962355/1962371 co-relation queries the response was YES. Maximal size of possible extension queue 714. Compared 104789 event pairs, 3264 based on Foata normal form. 56/15697 useless extension candidates. Maximal degree in co-relation 109097. Up to 8393 conditions per place. [2024-06-28 04:08:21,046 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 338 selfloop transitions, 284 changer transitions 24/649 dead transitions. [2024-06-28 04:08:21,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 649 transitions, 8769 flow [2024-06-28 04:08:21,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-28 04:08:21,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-28 04:08:21,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 262 transitions. [2024-06-28 04:08:21,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4564459930313589 [2024-06-28 04:08:21,051 INFO L175 Difference]: Start difference. First operand has 299 places, 399 transitions, 4994 flow. Second operand 14 states and 262 transitions. [2024-06-28 04:08:21,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 649 transitions, 8769 flow [2024-06-28 04:08:25,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 649 transitions, 8390 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-28 04:08:25,133 INFO L231 Difference]: Finished difference. Result has 310 places, 505 transitions, 6701 flow [2024-06-28 04:08:25,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4615, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=6701, PETRI_PLACES=310, PETRI_TRANSITIONS=505} [2024-06-28 04:08:25,134 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 268 predicate places. [2024-06-28 04:08:25,134 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 505 transitions, 6701 flow [2024-06-28 04:08:25,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.583333333333333) internal successors, (91), 12 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:08:25,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:08:25,134 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:08:25,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-28 04:08:25,134 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)] === [2024-06-28 04:08:25,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:08:25,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1610140277, now seen corresponding path program 2 times [2024-06-28 04:08:25,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:08:25,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245748009] [2024-06-28 04:08:25,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:08:25,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:08:25,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:08:27,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:08:27,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:08:27,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245748009] [2024-06-28 04:08:27,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245748009] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:08:27,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:08:27,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 04:08:27,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845633383] [2024-06-28 04:08:27,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:08:27,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 04:08:27,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:08:27,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 04:08:27,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-28 04:08:27,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-28 04:08:27,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 505 transitions, 6701 flow. Second operand has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:08:27,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:08:27,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-28 04:08:27,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:08:32,743 INFO L124 PetriNetUnfolderBase]: 10501/16371 cut-off events. [2024-06-28 04:08:32,743 INFO L125 PetriNetUnfolderBase]: For 2238217/2238233 co-relation queries the response was YES. [2024-06-28 04:08:32,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122340 conditions, 16371 events. 10501/16371 cut-off events. For 2238217/2238233 co-relation queries the response was YES. Maximal size of possible extension queue 753. Compared 110226 event pairs, 3619 based on Foata normal form. 56/16427 useless extension candidates. Maximal degree in co-relation 122198. Up to 8353 conditions per place. [2024-06-28 04:08:32,922 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 321 selfloop transitions, 302 changer transitions 16/642 dead transitions. [2024-06-28 04:08:32,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 642 transitions, 9256 flow [2024-06-28 04:08:32,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-28 04:08:32,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-28 04:08:32,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 241 transitions. [2024-06-28 04:08:32,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4521575984990619 [2024-06-28 04:08:32,923 INFO L175 Difference]: Start difference. First operand has 310 places, 505 transitions, 6701 flow. Second operand 13 states and 241 transitions. [2024-06-28 04:08:32,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 642 transitions, 9256 flow [2024-06-28 04:08:37,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 642 transitions, 8995 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-28 04:08:37,735 INFO L231 Difference]: Finished difference. Result has 317 places, 524 transitions, 7505 flow [2024-06-28 04:08:37,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6471, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=505, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=282, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7505, PETRI_PLACES=317, PETRI_TRANSITIONS=524} [2024-06-28 04:08:37,736 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 275 predicate places. [2024-06-28 04:08:37,736 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 524 transitions, 7505 flow [2024-06-28 04:08:37,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:08:37,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:08:37,737 INFO 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] [2024-06-28 04:08:37,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-28 04:08:37,737 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)] === [2024-06-28 04:08:37,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:08:37,737 INFO L85 PathProgramCache]: Analyzing trace with hash 26198903, now seen corresponding path program 3 times [2024-06-28 04:08:37,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:08:37,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975079520] [2024-06-28 04:08:37,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:08:37,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:08:37,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:08:40,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:08:40,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:08:40,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975079520] [2024-06-28 04:08:40,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975079520] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:08:40,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:08:40,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 04:08:40,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051506710] [2024-06-28 04:08:40,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:08:40,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 04:08:40,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:08:40,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 04:08:40,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-28 04:08:40,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-28 04:08:40,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 524 transitions, 7505 flow. Second operand has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:08:40,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:08:40,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-28 04:08:40,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:08:45,837 INFO L124 PetriNetUnfolderBase]: 11323/17645 cut-off events. [2024-06-28 04:08:45,837 INFO L125 PetriNetUnfolderBase]: For 2872477/2872493 co-relation queries the response was YES. [2024-06-28 04:08:46,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145474 conditions, 17645 events. 11323/17645 cut-off events. For 2872477/2872493 co-relation queries the response was YES. Maximal size of possible extension queue 759. Compared 119894 event pairs, 3591 based on Foata normal form. 24/17669 useless extension candidates. Maximal degree in co-relation 145331. Up to 8353 conditions per place. [2024-06-28 04:08:46,088 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 312 selfloop transitions, 308 changer transitions 11/634 dead transitions. [2024-06-28 04:08:46,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 634 transitions, 9731 flow [2024-06-28 04:08:46,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-28 04:08:46,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-28 04:08:46,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 235 transitions. [2024-06-28 04:08:46,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44090056285178236 [2024-06-28 04:08:46,089 INFO L175 Difference]: Start difference. First operand has 317 places, 524 transitions, 7505 flow. Second operand 13 states and 235 transitions. [2024-06-28 04:08:46,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 634 transitions, 9731 flow [2024-06-28 04:08:51,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 634 transitions, 9317 flow, removed 17 selfloop flow, removed 11 redundant places. [2024-06-28 04:08:51,726 INFO L231 Difference]: Finished difference. Result has 320 places, 531 transitions, 7880 flow [2024-06-28 04:08:51,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7107, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=299, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7880, PETRI_PLACES=320, PETRI_TRANSITIONS=531} [2024-06-28 04:08:51,728 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 278 predicate places. [2024-06-28 04:08:51,729 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 531 transitions, 7880 flow [2024-06-28 04:08:51,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:08:51,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:08:51,729 INFO 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] [2024-06-28 04:08:51,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-28 04:08:51,729 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)] === [2024-06-28 04:08:51,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:08:51,730 INFO L85 PathProgramCache]: Analyzing trace with hash 70074311, now seen corresponding path program 4 times [2024-06-28 04:08:51,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:08:51,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550157867] [2024-06-28 04:08:51,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:08:51,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:08:51,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:08:56,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:08:56,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:08:56,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550157867] [2024-06-28 04:08:56,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550157867] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:08:56,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:08:56,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:08:56,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270291490] [2024-06-28 04:08:56,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:08:56,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:08:56,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:08:56,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:08:56,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:08:57,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-28 04:08:57,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 531 transitions, 7880 flow. Second operand has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:08:57,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:08:57,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-28 04:08:57,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:09:05,613 INFO L124 PetriNetUnfolderBase]: 16581/25967 cut-off events. [2024-06-28 04:09:05,613 INFO L125 PetriNetUnfolderBase]: For 5392802/5392806 co-relation queries the response was YES. [2024-06-28 04:09:05,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 212901 conditions, 25967 events. 16581/25967 cut-off events. For 5392802/5392806 co-relation queries the response was YES. Maximal size of possible extension queue 1086. Compared 188708 event pairs, 5880 based on Foata normal form. 292/26259 useless extension candidates. Maximal degree in co-relation 212758. Up to 14649 conditions per place. [2024-06-28 04:09:06,067 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 346 selfloop transitions, 354 changer transitions 55/758 dead transitions. [2024-06-28 04:09:06,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 758 transitions, 12045 flow [2024-06-28 04:09:06,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-28 04:09:06,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-28 04:09:06,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 249 transitions. [2024-06-28 04:09:06,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4337979094076655 [2024-06-28 04:09:06,069 INFO L175 Difference]: Start difference. First operand has 320 places, 531 transitions, 7880 flow. Second operand 14 states and 249 transitions. [2024-06-28 04:09:06,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 758 transitions, 12045 flow [2024-06-28 04:09:14,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 758 transitions, 11312 flow, removed 10 selfloop flow, removed 10 redundant places. [2024-06-28 04:09:14,786 INFO L231 Difference]: Finished difference. Result has 328 places, 609 transitions, 9397 flow [2024-06-28 04:09:14,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7328, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=259, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=9397, PETRI_PLACES=328, PETRI_TRANSITIONS=609} [2024-06-28 04:09:14,787 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 286 predicate places. [2024-06-28 04:09:14,787 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 609 transitions, 9397 flow [2024-06-28 04:09:14,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:09:14,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:09:14,787 INFO 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] [2024-06-28 04:09:14,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-28 04:09:14,787 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)] === [2024-06-28 04:09:14,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:09:14,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1857248791, now seen corresponding path program 5 times [2024-06-28 04:09:14,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:09:14,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396155034] [2024-06-28 04:09:14,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:09:14,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:09:14,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:09:17,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:09:17,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:09:17,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396155034] [2024-06-28 04:09:17,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396155034] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:09:17,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:09:17,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 04:09:17,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074784516] [2024-06-28 04:09:17,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:09:17,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 04:09:17,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:09:17,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 04:09:17,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-28 04:09:17,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-28 04:09:17,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 609 transitions, 9397 flow. Second operand has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:09:17,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:09:17,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-28 04:09:17,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand